clk: convert API to match reset/mailbox style

The following changes are made to the clock API: * The concept of "clocks" and "peripheral clocks" are unified; each clock provider now implements a single set of clocks. This provides a simpler conceptual interface to clients, and better aligns with device tree clock bindings. * Clocks are now identified with a single "struct clk", rather than requiring clients to store the clock provider device and clock identity values separately. For simple clock consumers, this isolates clients from internal details of the clock API. * clk.h is split so it only contains the client/consumer API, whereas clk-uclass.h contains the provider API. This aligns with the recently added reset and mailbox APIs. * clk_ops .of_xlate(), .request(), and .free() are added so providers can customize these operations if needed. This also aligns with the recently added reset and mailbox APIs. * clk_disable() is added. * All users of the current clock APIs are updated. * Sandbox clock tests are updated to exercise clock lookup via DT, and clock enable/disable. * rkclk_get_clk() is removed and replaced with standard APIs. Buildman shows no clock-related errors for any board for which buildman can download a toolchain. test/py passes for sandbox (which invokes the dm clk test amongst others). Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>

clk: convert API to match reset/mailbox style
The following changes are made to the clock API: * The concept of "clocks" and "peripheral clocks" are unified; each clock provider now implements a single set of clocks. This provides a simpler conceptual interface to clients, and better aligns with device tree clock bindings. * Clocks are now identified with a single "struct clk", rather than requiring clients to store the clock provider device and clock identity values separately. For simple clock consumers, this isolates clients from internal details of the clock API. * clk.h is split so it only contains the client/consumer API, whereas clk-uclass.h contains the provider API. This aligns with the recently added reset and mailbox APIs. * clk_ops .of_xlate(), .request(), and .free() are added so providers can customize these operations if needed. This also aligns with the recently added reset and mailbox APIs. * clk_disable() is added. * All users of the current clock APIs are updated. * Sandbox clock tests are updated to exercise clock lookup via DT, and clock enable/disable. * rkclk_get_clk() is removed and replaced with standard APIs. Buildman shows no clock-related errors for any board for which buildman can download a toolchain. test/py passes for sandbox (which invokes the dm clk test amongst others). Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
Stephen Warren · Simon Glass · Eric Lee · Eric Lee · Eric Lee · Eric Lee
1 parent 4581b717b1
Showing 37 changed files with 985 additions and 570 deletions Side-by-side Diff
arch/arm/include/asm/arch-rockchip/clock.h
arch/arm/mach-rockchip/board.c
arch/arm/mach-rockchip/rk3288/sdram_rk3288.c
arch/arm/mach-snapdragon/clock-apq8016.c
arch/arm/mach-zynq/clk.c
arch/mips/mach-pic32/cpu.c
arch/sandbox/dts/test.dts
arch/sandbox/include/asm/clk.h
arch/sandbox/include/asm/test.h
board/microchip/pic32mzda/pic32mzda.c
drivers/clk/Makefile
drivers/clk/clk-uclass.c
drivers/clk/clk_fixed_rate.c
drivers/clk/clk_pic32.c
drivers/clk/clk_rk3036.c
drivers/clk/clk_rk3288.c
drivers/clk/clk_sandbox.c
drivers/clk/clk_sandbox_test.c
drivers/clk/exynos/clk-exynos7420.c
drivers/clk/uniphier/clk-uniphier-core.c
@@ -62,18 +62,6 @@
  */
 void *rockchip_get_cru(void);
  
-/**
- * rkclk_get_clk() - get a pointer to a given clock
- *
- * This is an internal function - use outside the clock subsystem indicates
- * that work is needed!
- *
- * @clk_id:	Clock requested
- * @devp:	Returns a pointer to that clock
- * @return 0 if OK, -ve on error
- */
-int rkclk_get_clk(enum rk_clk_id clk_id, struct udevice **devp);
-
 struct rk3288_cru;
 struct rk3288_grf;
  
@@ -9,6 +9,7 @@
 #include <dm.h>
 #include <ram.h>
 #include <asm/io.h>
+#include <asm/arch/clock.h>
  
 DECLARE_GLOBAL_DATA_PTR;
  
  
  
@@ -54,15 +55,43 @@
 static int do_clock(cmd_tbl_t *cmdtp, int flag, int argc,
 		       char * const argv[])
 {
+	static const struct {
+		char *name;
+		int id;
+	} clks[] = {
+		{ "osc", CLK_OSC },
+		{ "apll", CLK_ARM },
+		{ "dpll", CLK_DDR },
+		{ "cpll", CLK_CODEC },
+		{ "gpll", CLK_GENERAL },
+#ifdef CONFIG_ROCKCHIP_RK3036
+		{ "mpll", CLK_NEW },
+#else
+		{ "npll", CLK_NEW },
+#endif
+	};
+	int ret, i;
 	struct udevice *dev;
  
-	for (uclass_first_device(UCLASS_CLK, &dev);
-	     dev;
-	     uclass_next_device(&dev)) {
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
+	if (ret) {
+		printf("clk-uclass not found\n");
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(clks); i++) {
+		struct clk clk;
 		ulong rate;
  
-		rate = clk_get_rate(dev);
-		printf("%s: %lu\n", dev->name, rate);
+		clk.id = clks[i].id;
+		ret = clk_request(dev, &clk);
+		if (ret < 0)
+			continue;
+
+		rate = clk_get_rate(&clk);
+		printf("%s: %lu\n", clks[i].name, rate);
+
+		clk_free(&clk);
 	}
  
 	return 0;
@@ -36,7 +36,7 @@
 struct dram_info {
 	struct chan_info chan[2];
 	struct ram_info info;
-	struct udevice *ddr_clk;
+	struct clk ddr_clk;
 	struct rk3288_cru *cru;
 	struct rk3288_grf *grf;
 	struct rk3288_sgrf *sgrf;
@@ -576,7 +576,7 @@
 	rk_clrsetreg(&dram->sgrf->soc_con2, 0x1f, sdram_params->base.stride);
 }
  
-static int sdram_init(const struct dram_info *dram,
+static int sdram_init(struct dram_info *dram,
 		      const struct rk3288_sdram_params *sdram_params)
 {
 	int channel;
@@ -592,8 +592,8 @@
 		return -E2BIG;
 	}
  
-	debug("ddr clk %s\n", dram->ddr_clk->name);
-	ret = clk_set_rate(dram->ddr_clk, sdram_params->base.ddr_freq);
+	debug("ddr clk dpll\n");
+	ret = clk_set_rate(&dram->ddr_clk, sdram_params->base.ddr_freq);
 	debug("ret=%d\n", ret);
 	if (ret) {
 		debug("Could not set DDR clock\n");
@@ -836,6 +836,7 @@
 	struct dram_info *priv = dev_get_priv(dev);
 	struct regmap *map;
 	int ret;
+	struct udevice *dev_clk;
  
 	map = syscon_get_regmap_by_driver_data(ROCKCHIP_SYSCON_NOC);
 	if (IS_ERR(map))
@@ -856,7 +857,11 @@
 	priv->chan[1].pctl = regmap_get_range(map, 2);
 	priv->chan[1].publ = regmap_get_range(map, 3);
  
-	ret = uclass_get_device(UCLASS_CLK, CLK_DDR, &priv->ddr_clk);
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev_clk);
+	if (ret)
+		return ret;
+	priv->ddr_clk.id = CLK_DDR;
+	ret = clk_request(dev_clk, &priv->ddr_clk);
 	if (ret)
 		return ret;
  
@@ -9,7 +9,7 @@
  */
  
 #include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
 #include <asm/io.h>
  
  
@@ -212,11 +212,11 @@
 	return 0;
 }
  
-ulong msm_set_periph_rate(struct udevice *dev, int periph, ulong rate)
+ulong msm_set_rate(struct clk *clk, ulong rate)
 {
-	struct msm_clk_priv *priv = dev_get_priv(dev);
+	struct msm_clk_priv *priv = dev_get_priv(clk->dev);
  
-	switch (periph) {
+	switch (clk->id) {
 	case 0: /* SDC1 */
 		return clk_init_sdc(priv, 0, rate);
 		break;
@@ -243,7 +243,7 @@
 }
  
 static struct clk_ops msm_clk_ops = {
-	.set_periph_rate = msm_set_periph_rate,
+	.set_rate = msm_set_rate,
 };
  
 static const struct udevice_id msm_clk_ids[] = {
@@ -6,7 +6,6 @@
  */
 #include <common.h>
 #include <errno.h>
-#include <clk.h>
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/clk.h>
@@ -23,20 +23,36 @@
  
 DECLARE_GLOBAL_DATA_PTR;
  
-static ulong clk_get_cpu_rate(void)
+static ulong rate(int id)
 {
 	int ret;
 	struct udevice *dev;
+	struct clk clk;
+	ulong rate;
  
 	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
 	if (ret) {
-		panic("uclass-clk: device not found\n");
+		printf("clk-uclass not found\n");
 		return 0;
 	}
  
-	return clk_get_rate(dev);
+	clk.id = id;
+	ret = clk_request(dev, &clk);
+	if (ret < 0)
+		return ret;
+
+	rate = clk_get_rate(&clk);
+
+	clk_free(&clk);
+
+	return rate;
 }
  
+static ulong clk_get_cpu_rate(void)
+{
+	return rate(PB7CLK);
+}
+
 /* initialize prefetch module related to cpu_clk */
 static void prefetch_init(void)
 {
  
  
  
  
  
  
@@ -127,30 +143,25 @@
 }
 #endif
 #ifdef CONFIG_CMD_CLK
+
 int soc_clk_dump(void)
 {
-	int i, ret;
-	struct udevice *dev;
+	int i;
  
-	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
-	if (ret) {
-		printf("clk-uclass not found\n");
-		return ret;
-	}
-
 	printf("PLL Speed: %lu MHz\n",
-	       CLK_MHZ(clk_get_periph_rate(dev, PLLCLK)));
-	printf("CPU Speed: %lu MHz\n", CLK_MHZ(clk_get_rate(dev)));
-	printf("MPLL Speed: %lu MHz\n",
-	       CLK_MHZ(clk_get_periph_rate(dev, MPLL)));
+	       CLK_MHZ(rate(PLLCLK)));
  
+	printf("CPU Speed: %lu MHz\n", CLK_MHZ(rate(PB7CLK)));
+
+	printf("MPLL Speed: %lu MHz\n", CLK_MHZ(rate(MPLL)));
+
 	for (i = PB1CLK; i <= PB7CLK; i++)
 		printf("PB%d Clock Speed: %lu MHz\n", i - PB1CLK + 1,
-		       CLK_MHZ(clk_get_periph_rate(dev, i)));
+		       CLK_MHZ(rate(i)));
  
 	for (i = REF1CLK; i <= REF5CLK; i++)
 		printf("REFO%d Clock Speed: %lu MHz\n", i - REF1CLK + 1,
-		       CLK_MHZ(clk_get_periph_rate(dev, i)));
+		       CLK_MHZ(rate(i)));
 	return 0;
 }
 #endif
@@ -108,8 +108,23 @@
 		compatible = "denx,u-boot-fdt-test";
 	};
  
-	clk@0 {
+	clk_fixed: clk-fixed {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <1234>;
+	};
+
+	clk_sandbox: clk-sbox {
 		compatible = "sandbox,clk";
+		#clock-cells = <1>;
+	};
+
+	clk-test {
+		compatible = "sandbox,clk-test";
+		clocks = <&clk_fixed>,
+			 <&clk_sandbox 1>,
+			 <&clk_sandbox 0>;
+		clock-names = "fixed", "i2c", "spi";
 	};
  
 	eth@10002000 {
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __SANDBOX_CLK_H
+#define __SANDBOX_CLK_H
+
+#include <common.h>
+
+struct udevice;
+
+/**
+ * enum sandbox_clk_id - Identity of clocks implemented by the sandbox clock
+ * provider.
+ *
+ * These IDs are within/relative-to the clock provider.
+ */
+enum sandbox_clk_id {
+	SANDBOX_CLK_ID_SPI,
+	SANDBOX_CLK_ID_I2C,
+
+	SANDBOX_CLK_ID_COUNT,
+};
+
+/**
+ * enum sandbox_clk_test_id - Identity of the clocks consumed by the sandbox
+ * clock test device.
+ *
+ * These are the IDs the clock consumer knows the clocks as.
+ */
+enum sandbox_clk_test_id {
+	SANDBOX_CLK_TEST_ID_FIXED,
+	SANDBOX_CLK_TEST_ID_SPI,
+	SANDBOX_CLK_TEST_ID_I2C,
+
+	SANDBOX_CLK_TEST_ID_COUNT,
+};
+
+/**
+ * sandbox_clk_query_rate - Query the current rate of a sandbox clock.
+ *
+ * @dev:	The sandbox clock provider device.
+ * @id:		The clock to query.
+ * @return:	The rate of the clock.
+ */
+ulong sandbox_clk_query_rate(struct udevice *dev, int id);
+/**
+ * sandbox_clk_query_enable - Query the enable state of a sandbox clock.
+ *
+ * @dev:	The sandbox clock provider device.
+ * @id:		The clock to query.
+ * @return:	The rate of the clock.
+ */
+int sandbox_clk_query_enable(struct udevice *dev, int id);
+
+/**
+ * sandbox_clk_test_get - Ask the sandbox clock test device to request its
+ * clocks.
+ *
+ * @dev:	The sandbox clock test (client) devivce.
+ * @return:	0 if OK, or a negative error code.
+ */
+int sandbox_clk_test_get(struct udevice *dev);
+/**
+ * sandbox_clk_test_get_rate - Ask the sandbox clock test device to query a
+ * clock's rate.
+ *
+ * @dev:	The sandbox clock test (client) devivce.
+ * @id:		The test device's clock ID to query.
+ * @return:	The rate of the clock.
+ */
+ulong sandbox_clk_test_get_rate(struct udevice *dev, int id);
+/**
+ * sandbox_clk_test_set_rate - Ask the sandbox clock test device to set a
+ * clock's rate.
+ *
+ * @dev:	The sandbox clock test (client) devivce.
+ * @id:		The test device's clock ID to configure.
+ * @return:	The new rate of the clock.
+ */
+ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate);
+/**
+ * sandbox_clk_test_enable - Ask the sandbox clock test device to enable a
+ * clock.
+ *
+ * @dev:	The sandbox clock test (client) devivce.
+ * @id:		The test device's clock ID to configure.
+ * @return:	0 if OK, or a negative error code.
+ */
+int sandbox_clk_test_enable(struct udevice *dev, int id);
+/**
+ * sandbox_clk_test_disable - Ask the sandbox clock test device to disable a
+ * clock.
+ *
+ * @dev:	The sandbox clock test (client) devivce.
+ * @id:		The test device's clock ID to configure.
+ * @return:	0 if OK, or a negative error code.
+ */
+int sandbox_clk_test_disable(struct udevice *dev, int id);
+/**
+ * sandbox_clk_test_free - Ask the sandbox clock test device to free its
+ * clocks.
+ *
+ * @dev:	The sandbox clock test (client) devivce.
+ * @return:	0 if OK, or a negative error code.
+ */
+int sandbox_clk_test_free(struct udevice *dev);
+
+#endif
@@ -19,15 +19,6 @@
  
 #define SANDBOX_CLK_RATE		32768
  
-enum {
-	PERIPH_ID_FIRST = 0,
-	PERIPH_ID_SPI = PERIPH_ID_FIRST,
-	PERIPH_ID_I2C,
-	PERIPH_ID_PCI,
-
-	PERIPH_ID_COUNT,
-};
-
 /* System controller driver data */
 enum {
 	SYSCON0		= 32,
@@ -11,20 +11,31 @@
 #include <common.h>
 #include <dm.h>
 #include <clk.h>
+#include <dt-bindings/clock/microchip,clock.h>
 #include <mach/pic32.h>
  
 #ifdef CONFIG_DISPLAY_BOARDINFO
 int checkboard(void)
 {
-	ulong rate = 0;
+	ulong rate;
 	struct udevice *dev;
+	struct clk clk;
+	int ret;
  
 	printf("Core: %s\n", get_core_name());
  
-	if (!uclass_get_device(UCLASS_CLK, 0, &dev)) {
-		rate = clk_get_rate(dev);
-		printf("CPU Speed: %lu MHz\n", rate / 1000000);
-	}
+	if (uclass_get_device(UCLASS_CLK, 0, &dev))
+		return 0;
+
+	clk.id = PB7CLK;
+	ret = clk_request(dev, &clk);
+	if (ret < 0)
+		return 0;
+
+	rate = clk_get_rate(&clk);
+	printf("CPU Speed: %lu MHz\n", rate / 1000000);
+
+	clk_free(&clk);
  
 	return 0;
 }
@@ -9,6 +9,7 @@
 obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o
 obj-$(CONFIG_ROCKCHIP_RK3288) += clk_rk3288.o
 obj-$(CONFIG_SANDBOX) += clk_sandbox.o
+obj-$(CONFIG_SANDBOX) += clk_sandbox_test.o
 obj-$(CONFIG_MACH_PIC32) += clk_pic32.o
 obj-$(CONFIG_CLK_UNIPHIER) += uniphier/
 obj-$(CONFIG_CLK_EXYNOS) += exynos/
 /*
  * Copyright (C) 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
+ * Copyright (c) 2016, NVIDIA CORPORATION.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
  
 #include <common.h>
 #include <clk.h>
+#include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
-#include <dm/lists.h>
-#include <dm/root.h>
  
 DECLARE_GLOBAL_DATA_PTR;
  
-ulong clk_get_rate(struct udevice *dev)
+static inline struct clk_ops *clk_dev_ops(struct udevice *dev)
 {
-	struct clk_ops *ops = clk_get_ops(dev);
-
-	if (!ops->get_rate)
-		return -ENOSYS;
-
-	return ops->get_rate(dev);
+	return (struct clk_ops *)dev->driver->ops;
 }
  
-ulong clk_set_rate(struct udevice *dev, ulong rate)
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+#ifdef CONFIG_SPL_BUILD
+int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
 {
-	struct clk_ops *ops = clk_get_ops(dev);
+	int ret;
+	u32 cell[2];
  
-	if (!ops->set_rate)
+	if (index != 0)
 		return -ENOSYS;
-
-	return ops->set_rate(dev, rate);
+	assert(clk);
+	ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev);
+	if (ret)
+		return ret;
+	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clocks",
+				   cell, 2);
+	if (ret)
+		return ret;
+	clk->id = cell[1];
+	return 0;
 }
  
-int clk_enable(struct udevice *dev, int periph)
+int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
 {
-	struct clk_ops *ops = clk_get_ops(dev);
-
-	if (!ops->enable)
-		return -ENOSYS;
-
-	return ops->enable(dev, periph);
+	return -ENOSYS;
 }
-
-ulong clk_get_periph_rate(struct udevice *dev, int periph)
+#else
+static int clk_of_xlate_default(struct clk *clk,
+				struct fdtdec_phandle_args *args)
 {
-	struct clk_ops *ops = clk_get_ops(dev);
+	debug("%s(clk=%p)\n", __func__, clk);
  
-	if (!ops->get_periph_rate)
-		return -ENOSYS;
+	if (args->args_count > 1) {
+		debug("Invaild args_count: %d\n", args->args_count);
+		return -EINVAL;
+	}
  
-	return ops->get_periph_rate(dev, periph);
-}
+	if (args->args_count)
+		clk->id = args->args[0];
+	else
+		clk->id = 0;
  
-ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate)
-{
-	struct clk_ops *ops = clk_get_ops(dev);
-
-	if (!ops->set_periph_rate)
-		return -ENOSYS;
-
-	return ops->set_periph_rate(dev, periph, rate);
+	return 0;
 }
  
-#if CONFIG_IS_ENABLED(OF_CONTROL)
-int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp)
+int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
 {
 	int ret;
-#ifdef CONFIG_SPL_BUILD
-	u32 cell[2];
-
-	if (index != 0)
-		return -ENOSYS;
-	assert(*clk_devp);
-	ret = uclass_get_device(UCLASS_CLK, 0, clk_devp);
-	if (ret)
-		return ret;
-	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clocks",
-				   cell, 2);
-	if (ret)
-		return ret;
-	return cell[1];
-#else
 	struct fdtdec_phandle_args args;
+	struct udevice *dev_clk;
+	struct clk_ops *ops;
  
-	assert(*clk_devp);
+	debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
+
+	assert(clk);
 	ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
 					     "clocks", "#clock-cells", 0, index,
 					     &args);
  
  
  
@@ -95,16 +82,117 @@
 		return ret;
 	}
  
-	ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, clk_devp);
+	ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, &dev_clk);
 	if (ret) {
 		debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
 		      __func__, ret);
 		return ret;
 	}
-	return args.args_count > 0 ? args.args[0] : 0;
-#endif
+	ops = clk_dev_ops(dev_clk);
+
+	if (ops->of_xlate)
+		ret = ops->of_xlate(clk, &args);
+	else
+		ret = clk_of_xlate_default(clk, &args);
+	if (ret) {
+		debug("of_xlate() failed: %d\n", ret);
+		return ret;
+	}
+
+	return clk_request(dev_clk, clk);
 }
+
+int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
+{
+	int index;
+
+	debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk);
+
+	index = fdt_find_string(gd->fdt_blob, dev->of_offset, "clock-names",
+				name);
+	if (index < 0) {
+		debug("fdt_find_string() failed: %d\n", index);
+		return index;
+	}
+
+	return clk_get_by_index(dev, index, clk);
+}
 #endif
+#endif
+
+int clk_request(struct udevice *dev, struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(dev);
+
+	debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk);
+
+	clk->dev = dev;
+
+	if (!ops->request)
+		return 0;
+
+	return ops->request(clk);
+}
+
+int clk_free(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->free)
+		return 0;
+
+	return ops->free(clk);
+}
+
+ulong clk_get_rate(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->get_rate)
+		return -ENOSYS;
+
+	return ops->get_rate(clk);
+}
+
+ulong clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
+
+	if (!ops->set_rate)
+		return -ENOSYS;
+
+	return ops->set_rate(clk, rate);
+}
+
+int clk_enable(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->enable)
+		return -ENOSYS;
+
+	return ops->enable(clk);
+}
+
+int clk_disable(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->disable)
+		return -ENOSYS;
+
+	return ops->disable(clk);
+}
  
 UCLASS_DRIVER(clk) = {
 	.id		= UCLASS_CLK,
@@ -5,7 +5,7 @@
  */
  
 #include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm/device.h>
  
 DECLARE_GLOBAL_DATA_PTR;
  
  
  
@@ -16,19 +16,16 @@
  
 #define to_clk_fixed_rate(dev)	((struct clk_fixed_rate *)dev_get_platdata(dev))
  
-static ulong clk_fixed_rate_get_rate(struct udevice *dev)
+static ulong clk_fixed_rate_get_rate(struct clk *clk)
 {
-	return to_clk_fixed_rate(dev)->fixed_rate;
-}
+	if (clk->id != 0)
+		return -EINVAL;
  
-static ulong clk_fixed_rate_get_periph_rate(struct udevice *dev, int periph)
-{
-	return clk_fixed_rate_get_rate(dev);
+	return to_clk_fixed_rate(clk->dev)->fixed_rate;
 }
  
 const struct clk_ops clk_fixed_rate_ops = {
 	.get_rate = clk_fixed_rate_get_rate,
-	.get_periph_rate = clk_fixed_rate_get_periph_rate,
 };
  
 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
@@ -6,7 +6,7 @@
  */
  
 #include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm.h>
 #include <div64.h>
 #include <wait_bit.h>
  
  
  
  
@@ -339,24 +339,17 @@
 	pic32_mpll_init(priv);
 }
  
-static ulong pic32_clk_get_rate(struct udevice *dev)
+static ulong pic32_get_rate(struct clk *clk)
 {
-	struct pic32_clk_priv *priv = dev_get_priv(dev);
-
-	return pic32_get_cpuclk(priv);
-}
-
-static ulong pic32_get_periph_rate(struct udevice *dev, int periph)
-{
-	struct pic32_clk_priv *priv = dev_get_priv(dev);
+	struct pic32_clk_priv *priv = dev_get_priv(clk->dev);
 	ulong rate;
  
-	switch (periph) {
+	switch (clk->id) {
 	case PB1CLK ... PB7CLK:
-		rate = pic32_get_pbclk(priv, periph);
+		rate = pic32_get_pbclk(priv, clk->id);
 		break;
 	case REF1CLK ... REF5CLK:
-		rate = pic32_get_refclk(priv, periph);
+		rate = pic32_get_refclk(priv, clk->id);
 		break;
 	case PLLCLK:
 		rate = pic32_get_pll_rate(priv);
  
  
  
@@ -372,15 +365,15 @@
 	return rate;
 }
  
-static ulong pic32_set_periph_rate(struct udevice *dev, int periph, ulong rate)
+static ulong pic32_set_rate(struct clk *clk, ulong rate)
 {
-	struct pic32_clk_priv *priv = dev_get_priv(dev);
+	struct pic32_clk_priv *priv = dev_get_priv(clk->dev);
 	ulong pll_hz;
  
-	switch (periph) {
+	switch (clk->id) {
 	case REF1CLK ... REF5CLK:
 		pll_hz = pic32_get_pll_rate(priv);
-		pic32_set_refclk(priv, periph, pll_hz, rate, ROCLK_SRC_SPLL);
+		pic32_set_refclk(priv, clk->id, pll_hz, rate, ROCLK_SRC_SPLL);
 		break;
 	default:
 		break;
@@ -390,9 +383,8 @@
 }
  
 static struct clk_ops pic32_pic32_clk_ops = {
-	.get_rate = pic32_clk_get_rate,
-	.set_periph_rate = pic32_set_periph_rate,
-	.get_periph_rate = pic32_get_periph_rate,
+	.set_rate = pic32_set_rate,
+	.get_rate = pic32_get_rate,
 };
  
 static int pic32_clk_probe(struct udevice *dev)
@@ -5,7 +5,7 @@
  */
  
 #include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
 #include <syscon.h>
@@ -18,10 +18,6 @@
  
 DECLARE_GLOBAL_DATA_PTR;
  
-struct rk3036_clk_plat {
-	enum rk_clk_id clk_id;
-};
-
 struct rk3036_clk_priv {
 	struct rk3036_cru *cru;
 	ulong rate;
  
  
  
  
  
  
@@ -315,31 +311,30 @@
 	return rockchip_mmc_get_clk(cru, clk_general_rate, periph);
 }
  
-static ulong rk3036_clk_get_rate(struct udevice *dev)
+static ulong rk3036_clk_get_rate(struct clk *clk)
 {
-	struct rk3036_clk_plat *plat = dev_get_platdata(dev);
-	struct rk3036_clk_priv *priv = dev_get_priv(dev);
+	struct rk3036_clk_priv *priv = dev_get_priv(clk->dev);
  
-	debug("%s\n", dev->name);
-	return rkclk_pll_get_rate(priv->cru, plat->clk_id);
+	switch (clk->id) {
+	case 0 ... 63:
+		return rkclk_pll_get_rate(priv->cru, clk->id);
+	default:
+		return -ENOENT;
+	}
 }
  
-static ulong rk3036_clk_set_rate(struct udevice *dev, ulong rate)
+static ulong rk3036_clk_set_rate(struct clk *clk, ulong rate)
 {
-	debug("%s\n", dev->name);
+	struct rk3036_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong new_rate, gclk_rate;
  
-	return 0;
-}
-
-static ulong rk3036_set_periph_rate(struct udevice *dev, int periph, ulong rate)
-{
-	struct rk3036_clk_priv *priv = dev_get_priv(dev);
-	ulong new_rate;
-
-	switch (periph) {
+	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
+	switch (clk->id) {
+	case 0 ... 63:
+		return 0;
 	case HCLK_EMMC:
-		new_rate = rockchip_mmc_set_clk(priv->cru, clk_get_rate(dev),
-						periph, rate);
+		new_rate = rockchip_mmc_set_clk(priv->cru, gclk_rate,
+						clk->id, rate);
 		break;
 	default:
 		return -ENOENT;
  
  
  
  
  
@@ -351,61 +346,22 @@
 static struct clk_ops rk3036_clk_ops = {
 	.get_rate	= rk3036_clk_get_rate,
 	.set_rate	= rk3036_clk_set_rate,
-	.set_periph_rate = rk3036_set_periph_rate,
 };
  
 static int rk3036_clk_probe(struct udevice *dev)
 {
-	struct rk3036_clk_plat *plat = dev_get_platdata(dev);
 	struct rk3036_clk_priv *priv = dev_get_priv(dev);
  
-	if (plat->clk_id != CLK_OSC) {
-		struct rk3036_clk_priv *parent_priv = dev_get_priv(dev->parent);
-
-		priv->cru = parent_priv->cru;
-		return 0;
-	}
 	priv->cru = (struct rk3036_cru *)dev_get_addr(dev);
 	rkclk_init(priv->cru);
  
 	return 0;
 }
  
-static const char *const clk_name[] = {
-	"osc",
-	"apll",
-	"dpll",
-	"cpll",
-	"gpll",
-	"mpll",
-};
-
 static int rk3036_clk_bind(struct udevice *dev)
 {
-	struct rk3036_clk_plat *plat = dev_get_platdata(dev);
-	int pll, ret;
+	int ret;
  
-	/* We only need to set up the root clock */
-	if (dev->of_offset == -1) {
-		plat->clk_id = CLK_OSC;
-		return 0;
-	}
-
-	/* Create devices for P main clocks */
-	for (pll = 1; pll < CLK_COUNT; pll++) {
-		struct udevice *child;
-		struct rk3036_clk_plat *cplat;
-
-		debug("%s %s\n", __func__, clk_name[pll]);
-		ret = device_bind_driver(dev, "clk_rk3036", clk_name[pll],
-					 &child);
-		if (ret)
-			return ret;
-
-		cplat = dev_get_platdata(child);
-		cplat->clk_id = pll;
-	}
-
 	/* The reset driver does not have a device node, so bind it here */
 	ret = device_bind_driver(gd->dm_root, "rk3036_sysreset", "reset", &dev);
 	if (ret)
@@ -424,7 +380,6 @@
 	.id		= UCLASS_CLK,
 	.of_match	= rk3036_clk_ids,
 	.priv_auto_alloc_size = sizeof(struct rk3036_clk_priv),
-	.platdata_auto_alloc_size = sizeof(struct rk3036_clk_plat),
 	.ops		= &rk3036_clk_ops,
 	.bind		= rk3036_clk_bind,
 	.probe		= rk3036_clk_probe,
@@ -5,7 +5,7 @@
  */
  
 #include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
 #include <syscon.h>
@@ -21,10 +21,6 @@
  
 DECLARE_GLOBAL_DATA_PTR;
  
-struct rk3288_clk_plat {
-	enum rk_clk_id clk_id;
-};
-
 struct rk3288_clk_priv {
 	struct rk3288_grf *grf;
 	struct rk3288_cru *cru;
  
  
  
@@ -135,34 +131,18 @@
 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
  
-int rkclk_get_clk(enum rk_clk_id clk_id, struct udevice **devp)
-{
-	struct udevice *dev;
-
-	for (uclass_find_first_device(UCLASS_CLK, &dev);
-	     dev;
-	     uclass_find_next_device(&dev)) {
-		struct rk3288_clk_plat *plat = dev_get_platdata(dev);
-
-		if (plat->clk_id == clk_id) {
-			*devp = dev;
-			return device_probe(dev);
-		}
-	}
-
-	return -ENODEV;
-}
-
 void *rockchip_get_cru(void)
 {
 	struct rk3288_clk_priv *priv;
 	struct udevice *dev;
 	int ret;
  
-	ret = rkclk_get_clk(CLK_GENERAL, &dev);
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
 	if (ret)
 		return ERR_PTR(ret);
+
 	priv = dev_get_priv(dev);
+
 	return priv->cru;
 }
  
@@ -539,32 +519,6 @@
 	}
 }
  
-static ulong rk3288_clk_get_rate(struct udevice *dev)
-{
-	struct rk3288_clk_plat *plat = dev_get_platdata(dev);
-	struct rk3288_clk_priv *priv = dev_get_priv(dev);
-
-	debug("%s\n", dev->name);
-	return rkclk_pll_get_rate(priv->cru, plat->clk_id);
-}
-
-static ulong rk3288_clk_set_rate(struct udevice *dev, ulong rate)
-{
-	struct rk3288_clk_plat *plat = dev_get_platdata(dev);
-	struct rk3288_clk_priv *priv = dev_get_priv(dev);
-
-	debug("%s\n", dev->name);
-	switch (plat->clk_id) {
-	case CLK_DDR:
-		rkclk_configure_ddr(priv->cru, priv->grf, rate);
-		break;
-	default:
-		return -ENOENT;
-	}
-
-	return 0;
-}
-
 static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint gclk_rate,
 				  int periph)
 {
  
  
  
  
  
@@ -710,27 +664,25 @@
 	return rockchip_spi_get_clk(cru, gclk_rate, periph);
 }
  
-static ulong rk3288_get_periph_rate(struct udevice *dev, int periph)
+static ulong rk3288_clk_get_rate(struct clk *clk)
 {
-	struct rk3288_clk_priv *priv = dev_get_priv(dev);
-	struct udevice *gclk;
+	struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
 	ulong new_rate, gclk_rate;
-	int ret;
  
-	ret = rkclk_get_clk(CLK_GENERAL, &gclk);
-	if (ret)
-		return ret;
-	gclk_rate = clk_get_rate(gclk);
-	switch (periph) {
+	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
+	switch (clk->id) {
+	case 0 ... 63:
+		new_rate = rkclk_pll_get_rate(priv->cru, clk->id);
+		break;
 	case HCLK_EMMC:
 	case HCLK_SDMMC:
 	case HCLK_SDIO0:
-		new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, periph);
+		new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id);
 		break;
 	case SCLK_SPI0:
 	case SCLK_SPI1:
 	case SCLK_SPI2:
-		new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, periph);
+		new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id);
 		break;
 	case PCLK_I2C0:
 	case PCLK_I2C1:
  
  
  
  
  
  
  
  
@@ -746,36 +698,34 @@
 	return new_rate;
 }
  
-static ulong rk3288_set_periph_rate(struct udevice *dev, int periph, ulong rate)
+static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate)
 {
-	struct rk3288_clk_priv *priv = dev_get_priv(dev);
+	struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
 	struct rk3288_cru *cru = priv->cru;
-	struct udevice *gclk;
 	ulong new_rate, gclk_rate;
-	int ret;
  
-	ret = rkclk_get_clk(CLK_GENERAL, &gclk);
-	if (ret)
-		return ret;
-	gclk_rate = clk_get_rate(gclk);
-	switch (periph) {
+	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
+	switch (clk->id) {
+	case CLK_DDR:
+		new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate);
+		break;
 	case HCLK_EMMC:
 	case HCLK_SDMMC:
 	case HCLK_SDIO0:
-		new_rate = rockchip_mmc_set_clk(cru, gclk_rate, periph, rate);
+		new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate);
 		break;
 	case SCLK_SPI0:
 	case SCLK_SPI1:
 	case SCLK_SPI2:
-		new_rate = rockchip_spi_set_clk(cru, gclk_rate, periph, rate);
+		new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate);
 		break;
 #ifndef CONFIG_SPL_BUILD
 	case SCLK_MAC:
-		new_rate = rockchip_mac_set_clk(priv->cru, periph, rate);
+		new_rate = rockchip_mac_set_clk(priv->cru, clk->id, rate);
 		break;
 	case DCLK_VOP0:
 	case DCLK_VOP1:
-		new_rate = rockchip_vop_set_clk(cru, priv->grf, periph, rate);
+		new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate);
 		break;
 	case SCLK_EDP_24M:
 		/* clk_edp_24M source: 24M */
@@ -795,7 +745,7 @@
 		div = CPLL_HZ / rate;
 		assert((div - 1 < 64) && (div * rate == CPLL_HZ));
  
-		switch (periph) {
+		switch (clk->id) {
 		case ACLK_VOP0:
 			rk_clrsetreg(&cru->cru_clksel_con[31],
 				     3 << 6 | 0x1f << 0,
  
  
@@ -831,22 +781,12 @@
 static struct clk_ops rk3288_clk_ops = {
 	.get_rate	= rk3288_clk_get_rate,
 	.set_rate	= rk3288_clk_set_rate,
-	.set_periph_rate = rk3288_set_periph_rate,
-	.get_periph_rate = rk3288_get_periph_rate,
 };
  
 static int rk3288_clk_probe(struct udevice *dev)
 {
-	struct rk3288_clk_plat *plat = dev_get_platdata(dev);
 	struct rk3288_clk_priv *priv = dev_get_priv(dev);
  
-	if (plat->clk_id != CLK_OSC) {
-		struct rk3288_clk_priv *parent_priv = dev_get_priv(dev->parent);
-
-		priv->cru = parent_priv->cru;
-		priv->grf = parent_priv->grf;
-		return 0;
-	}
 	priv->cru = (struct rk3288_cru *)dev_get_addr(dev);
 	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 #ifdef CONFIG_SPL_BUILD
  
  
@@ -856,40 +796,10 @@
 	return 0;
 }
  
-static const char *const clk_name[CLK_COUNT] = {
-	"osc",
-	"apll",
-	"dpll",
-	"cpll",
-	"gpll",
-	"npll",
-};
-
 static int rk3288_clk_bind(struct udevice *dev)
 {
-	struct rk3288_clk_plat *plat = dev_get_platdata(dev);
-	int pll, ret;
+	int ret;
  
-	/* We only need to set up the root clock */
-	if (dev->of_offset == -1) {
-		plat->clk_id = CLK_OSC;
-		return 0;
-	}
-
-	/* Create devices for P main clocks */
-	for (pll = 1; pll < CLK_COUNT; pll++) {
-		struct udevice *child;
-		struct rk3288_clk_plat *cplat;
-
-		debug("%s %s\n", __func__, clk_name[pll]);
-		ret = device_bind_driver(dev, "clk_rk3288", clk_name[pll],
-					 &child);
-		if (ret)
-			return ret;
-		cplat = dev_get_platdata(child);
-		cplat->clk_id = pll;
-	}
-
 	/* The reset driver does not have a device node, so bind it here */
 	ret = device_bind_driver(gd->dm_root, "rk3288_sysreset", "reset", &dev);
 	if (ret)
@@ -908,7 +818,6 @@
 	.id		= UCLASS_CLK,
 	.of_match	= rk3288_clk_ids,
 	.priv_auto_alloc_size = sizeof(struct rk3288_clk_priv),
-	.platdata_auto_alloc_size = sizeof(struct rk3288_clk_plat),
 	.ops		= &rk3288_clk_ops,
 	.bind		= rk3288_clk_bind,
 	.probe		= rk3288_clk_probe,
@@ -5,70 +5,72 @@
  */
  
 #include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
-#include <asm/test.h>
+#include <asm/clk.h>
  
 struct sandbox_clk_priv {
-	ulong rate;
-	ulong periph_rate[PERIPH_ID_COUNT];
+	ulong rate[SANDBOX_CLK_ID_COUNT];
+	bool enabled[SANDBOX_CLK_ID_COUNT];
 };
  
-static ulong sandbox_clk_get_rate(struct udevice *dev)
+static ulong sandbox_clk_get_rate(struct clk *clk)
 {
-	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
  
-	return priv->rate;
+	if (clk->id < 0 || clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->rate[clk->id];
 }
  
-static ulong sandbox_clk_set_rate(struct udevice *dev, ulong rate)
+static ulong sandbox_clk_set_rate(struct clk *clk, ulong rate)
 {
-	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong old_rate;
  
+	if (clk->id < 0 || clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
 	if (!rate)
 		return -EINVAL;
-	priv->rate = rate;
-	return 0;
-}
  
-static ulong sandbox_get_periph_rate(struct udevice *dev, int periph)
-{
-	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+	old_rate = priv->rate[clk->id];
+	priv->rate[clk->id] = rate;
  
-	if (periph < PERIPH_ID_FIRST || periph >= PERIPH_ID_COUNT)
-		return -EINVAL;
-	return priv->periph_rate[periph];
+	return old_rate;
 }
  
-static ulong sandbox_set_periph_rate(struct udevice *dev, int periph,
-				     ulong rate)
+static int sandbox_clk_enable(struct clk *clk)
 {
-	struct sandbox_clk_priv *priv = dev_get_priv(dev);
-	ulong old_rate;
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
  
-	if (periph < PERIPH_ID_FIRST || periph >= PERIPH_ID_COUNT)
+	if (clk->id < 0 || clk->id >= SANDBOX_CLK_ID_COUNT)
 		return -EINVAL;
-	old_rate = priv->periph_rate[periph];
-	priv->periph_rate[periph] = rate;
  
-	return old_rate;
+	priv->enabled[clk->id] = true;
+
+	return 0;
 }
  
-static int sandbox_clk_probe(struct udevice *dev)
+static int sandbox_clk_disable(struct clk *clk)
 {
-	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
  
-	priv->rate = SANDBOX_CLK_RATE;
+	if (clk->id < 0 || clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
  
+	priv->enabled[clk->id] = false;
+
 	return 0;
 }
  
 static struct clk_ops sandbox_clk_ops = {
 	.get_rate	= sandbox_clk_get_rate,
 	.set_rate	= sandbox_clk_set_rate,
-	.get_periph_rate = sandbox_get_periph_rate,
-	.set_periph_rate = sandbox_set_periph_rate,
+	.enable		= sandbox_clk_enable,
+	.disable	= sandbox_clk_disable,
 };
  
 static const struct udevice_id sandbox_clk_ids[] = {
  
@@ -82,6 +84,25 @@
 	.of_match	= sandbox_clk_ids,
 	.ops		= &sandbox_clk_ops,
 	.priv_auto_alloc_size = sizeof(struct sandbox_clk_priv),
-	.probe		= sandbox_clk_probe,
 };
+
+ulong sandbox_clk_query_rate(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->rate[id];
+}
+
+int sandbox_clk_query_enable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->enabled[id];
+}
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <clk.h>
+#include <asm/clk.h>
+
+struct sandbox_clk_test {
+	struct clk clks[SANDBOX_CLK_TEST_ID_COUNT];
+};
+
+static const char * const sandbox_clk_test_names[] = {
+	[SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
+	[SANDBOX_CLK_TEST_ID_SPI] = "spi",
+	[SANDBOX_CLK_TEST_ID_I2C] = "i2c",
+};
+
+int sandbox_clk_test_get(struct udevice *dev)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+	int i, ret;
+
+	for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
+		ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
+				      &sbct->clks[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_get_rate(&sbct->clks[id]);
+}
+
+ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_set_rate(&sbct->clks[id], rate);
+}
+
+int sandbox_clk_test_enable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_enable(&sbct->clks[id]);
+}
+
+int sandbox_clk_test_disable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_disable(&sbct->clks[id]);
+}
+
+int sandbox_clk_test_free(struct udevice *dev)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+	int i, ret;
+
+	for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
+		ret = clk_free(&sbct->clks[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct udevice_id sandbox_clk_test_ids[] = {
+	{ .compatible = "sandbox,clk-test" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_clk_test) = {
+	.name = "sandbox_clk_test",
+	.id = UCLASS_MISC,
+	.of_match = sandbox_clk_test_ids,
+	.priv_auto_alloc_size = sizeof(struct sandbox_clk_test),
+};
@@ -9,7 +9,7 @@
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <asm/io.h>
 #include <dt-bindings/clock/exynos7420-clk.h>
 #include "clk-pll.h"
  
  
@@ -67,11 +67,11 @@
 	unsigned long sclk_uart2;
 };
  
-static ulong exynos7420_topc_get_periph_rate(struct udevice *dev, int periph)
+static ulong exynos7420_topc_get_rate(struct clk *clk)
 {
-	struct exynos7420_clk_topc_priv *priv = dev_get_priv(dev);
+	struct exynos7420_clk_topc_priv *priv = dev_get_priv(clk->dev);
  
-	switch (periph) {
+	switch (clk->id) {
 	case DOUT_SCLK_BUS0_PLL:
 	case SCLK_BUS0_PLL_A:
 	case SCLK_BUS0_PLL_B:
  
@@ -86,14 +86,14 @@
 }
  
 static struct clk_ops exynos7420_clk_topc_ops = {
-	.get_periph_rate	= exynos7420_topc_get_periph_rate,
+	.get_rate	= exynos7420_topc_get_rate,
 };
  
 static int exynos7420_clk_topc_probe(struct udevice *dev)
 {
 	struct exynos7420_clk_topc_priv *priv = dev_get_priv(dev);
 	struct exynos7420_clk_cmu_topc *topc;
-	struct udevice *clk_dev;
+	struct clk in_clk;
 	unsigned long rate;
 	fdt_addr_t base;
 	int ret;
  
@@ -105,9 +105,9 @@
 	topc = (struct exynos7420_clk_cmu_topc *)base;
 	priv->topc = topc;
  
-	ret = clk_get_by_index(dev, 0, &clk_dev);
+	ret = clk_get_by_index(dev, 0, &in_clk);
 	if (ret >= 0)
-		priv->fin_freq = clk_get_rate(clk_dev);
+		priv->fin_freq = clk_get_rate(&in_clk);
  
 	rate = pll145x_get_rate(&topc->bus0_pll_con[0], priv->fin_freq);
 	if (readl(&topc->mux_sel[1]) & (1 << 16))
  
  
@@ -122,12 +122,12 @@
 	return 0;
 }
  
-static ulong exynos7420_top0_get_periph_rate(struct udevice *dev, int periph)
+static ulong exynos7420_top0_get_rate(struct clk *clk)
 {
-	struct exynos7420_clk_top0_priv *priv = dev_get_priv(dev);
+	struct exynos7420_clk_top0_priv *priv = dev_get_priv(clk->dev);
 	struct exynos7420_clk_cmu_top0 *top0 = priv->top0;
  
-	switch (periph) {
+	switch (clk->id) {
 	case CLK_SCLK_UART2:
 		return priv->mout_top0_bus0_pll_half /
 			DIVIDER(&top0->div_peric[3], 8, 0xf);
  
@@ -137,14 +137,14 @@
 }
  
 static struct clk_ops exynos7420_clk_top0_ops = {
-	.get_periph_rate	= exynos7420_top0_get_periph_rate,
+	.get_rate	= exynos7420_top0_get_rate,
 };
  
 static int exynos7420_clk_top0_probe(struct udevice *dev)
 {
 	struct exynos7420_clk_top0_priv *priv;
 	struct exynos7420_clk_cmu_top0 *top0;
-	struct udevice *clk_dev;
+	struct clk in_clk;
 	fdt_addr_t base;
 	int ret;
  
  
@@ -159,10 +159,10 @@
 	top0 = (struct exynos7420_clk_cmu_top0 *)base;
 	priv->top0 = top0;
  
-	ret = clk_get_by_index(dev, 1, &clk_dev);
+	ret = clk_get_by_index(dev, 1, &in_clk);
 	if (ret >= 0) {
 		priv->mout_top0_bus0_pll_half =
-			clk_get_periph_rate(clk_dev, ret);
+			clk_get_rate(&in_clk);
 		if (readl(&top0->mux_sel[1]) & (1 << 16))
 			priv->mout_top0_bus0_pll_half >>= 1;
 	}
  
  
  
  
@@ -170,18 +170,18 @@
 	return 0;
 }
  
-static ulong exynos7420_peric1_get_periph_rate(struct udevice *dev, int periph)
+static ulong exynos7420_peric1_get_rate(struct clk *clk)
 {
-	struct udevice *clk_dev;
+	struct clk in_clk;
 	unsigned int ret;
 	unsigned long freq = 0;
  
-	switch (periph) {
+	switch (clk->id) {
 	case SCLK_UART2:
-		ret = clk_get_by_index(dev, 3, &clk_dev);
+		ret = clk_get_by_index(clk->dev, 3, &in_clk);
 		if (ret < 0)
 			return ret;
-		freq = clk_get_periph_rate(clk_dev, ret);
+		freq = clk_get_rate(&in_clk);
 		break;
 	}
  
@@ -189,7 +189,7 @@
 }
  
 static struct clk_ops exynos7420_clk_peric1_ops = {
-	.get_periph_rate	= exynos7420_peric1_get_periph_rate,
+	.get_rate	= exynos7420_peric1_get_rate,
 };
  
 static const struct udevice_id exynos7420_clk_topc_compat[] = {
@@ -9,14 +9,14 @@
 #include <linux/bitops.h>
 #include <linux/io.h>
 #include <linux/sizes.h>
-#include <clk.h>
+#include <clk-uclass.h>
 #include <dm/device.h>
  
 #include "clk-uniphier.h"
  
-static int uniphier_clk_enable(struct udevice *dev, int index)
+static int uniphier_clk_enable(struct clk *clk)
 {
-	struct uniphier_clk_priv *priv = dev_get_priv(dev);
+	struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
 	struct uniphier_clk_gate_data *gate = priv->socdata->gate;
 	unsigned int nr_gate = priv->socdata->nr_gate;
 	void __iomem *reg;
@@ -24,7 +24,7 @@
 	int i;
  
 	for (i = 0; i < nr_gate; i++) {
-		if (gate[i].index != index)
+		if (gate[i].index != clk->id)
 			continue;
  
 		reg = priv->base + gate[i].reg;
  
@@ -41,9 +41,9 @@
 	return 0;
 }
  
-static ulong uniphier_clk_get_rate(struct udevice *dev, int index)
+static ulong uniphier_clk_get_rate(struct clk *clk)
 {
-	struct uniphier_clk_priv *priv = dev_get_priv(dev);
+	struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
 	struct uniphier_clk_rate_data *rdata = priv->socdata->rate;
 	unsigned int nr_rdata = priv->socdata->nr_rate;
 	void __iomem *reg;
@@ -52,7 +52,7 @@
 	int i;
  
 	for (i = 0; i < nr_rdata; i++) {
-		if (rdata[i].index != index)
+		if (rdata[i].index != clk->id)
 			continue;
  
 		if (rdata[i].reg == UNIPHIER_CLK_RATE_IS_FIXED)
  
@@ -75,9 +75,9 @@
 	return matched_rate;
 }
  
-static ulong uniphier_clk_set_rate(struct udevice *dev, int index, ulong rate)
+static ulong uniphier_clk_set_rate(struct clk *clk, ulong rate)
 {
-	struct uniphier_clk_priv *priv = dev_get_priv(dev);
+	struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
 	struct uniphier_clk_rate_data *rdata = priv->socdata->rate;
 	unsigned int nr_rdata = priv->socdata->nr_rate;
 	void __iomem *reg;
@@ -87,7 +87,7 @@
  
 	/* first, decide the best match rate */
 	for (i = 0; i < nr_rdata; i++) {
-		if (rdata[i].index != index)
+		if (rdata[i].index != clk->id)
 			continue;
  
 		if (rdata[i].reg == UNIPHIER_CLK_RATE_IS_FIXED)
@@ -105,7 +105,7 @@
  
 	/* second, really set registers */
 	for (i = 0; i < nr_rdata; i++) {
-		if (rdata[i].index != index || rdata[i].rate != best_rate)
+		if (rdata[i].index != clk->id || rdata[i].rate != best_rate)
 			continue;
  
 		reg = priv->base + rdata[i].reg;
@@ -124,8 +124,8 @@
  
 const struct clk_ops uniphier_clk_ops = {
 	.enable = uniphier_clk_enable,
-	.get_periph_rate = uniphier_clk_get_rate,
-	.set_periph_rate = uniphier_clk_set_rate,
+	.get_rate = uniphier_clk_get_rate,
+	.set_rate = uniphier_clk_set_rate,
 };
  
 int uniphier_clk_probe(struct udevice *dev)
@@ -4,7 +4,6 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
  
-#include <clk.h>
 #include <dm/device.h>
  
 #include "clk-uniphier.h"
@@ -29,10 +29,9 @@
 #define RK_I2C_FIFO_SIZE	32
  
 struct rk_i2c {
-	struct udevice *clk;
+	struct clk clk;
 	struct i2c_regs *regs;
 	unsigned int speed;
-	int clk_id;
 };
  
 static inline void rk_i2c_get_div(int div, int *divh, int *divl)
@@ -55,7 +54,7 @@
 	int div, divl, divh;
  
 	/* First get i2c rate from pclk */
-	i2c_rate = clk_get_periph_rate(i2c->clk, i2c->clk_id);
+	i2c_rate = clk_get_rate(&i2c->clk);
  
 	div = DIV_ROUND_UP(i2c_rate, scl_rate * 8) - 2;
 	divh = 0;
@@ -362,7 +361,6 @@
 		      bus->name, ret);
 		return ret;
 	}
-	priv->clk_id = ret;
  
 	return 0;
 }
@@ -49,7 +49,8 @@
 					"clock-frequency", 400000);
 	uint clkd[2]; /* clk_id and clk_no */
 	int clk_offset;
-	struct udevice *clk;
+	struct udevice *clk_dev;
+	struct clk clk;
 	int ret;
  
 	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clock", clkd,
  
@@ -61,11 +62,17 @@
 	if (clk_offset < 0)
 		return clk_offset;
  
-	ret = uclass_get_device_by_of_offset(UCLASS_CLK, clk_offset, &clk);
+	ret = uclass_get_device_by_of_offset(UCLASS_CLK, clk_offset, &clk_dev);
 	if (ret)
 		return ret;
  
-	ret = clk_set_periph_rate(clk, clkd[1], clk_rate);
+	clk.id = clkd[1];
+	ret = clk_request(clk_dev, &clk);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_set_rate(&clk, clk_rate);
+	clk_free(&clk);
 	if (ret < 0)
 		return ret;
  
@@ -24,8 +24,7 @@
 };
  
 struct rockchip_dwmmc_priv {
-	struct udevice *clk;
-	int periph;
+	struct clk clk;
 	struct dwmci_host host;
 };
  
@@ -35,7 +34,7 @@
 	struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
 	int ret;
  
-	ret = clk_set_periph_rate(priv->clk, priv->periph, freq);
+	ret = clk_set_rate(&priv->clk, freq);
 	if (ret < 0) {
 		debug("%s: err=%d\n", __func__, ret);
 		return ret;
@@ -81,7 +80,6 @@
 	ret = clk_get_by_index(dev, 0, &priv->clk);
 	if (ret < 0)
 		return ret;
-	priv->periph = ret;
  
 	if (fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
 				 "clock-freq-min-max", minmax, 2))
@@ -651,8 +651,7 @@
 	struct uniphier_sd_priv *priv = dev_get_priv(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	fdt_addr_t base;
-	struct udevice *clk_dev;
-	int clk_id;
+	struct clk clk;
 	int ret;
  
 	priv->dev = dev;
  
  
  
  
@@ -665,20 +664,22 @@
 	if (!priv->regbase)
 		return -ENOMEM;
  
-	clk_id = clk_get_by_index(dev, 0, &clk_dev);
-	if (clk_id < 0) {
+	ret = clk_get_by_index(dev, 0, &clk);
+	if (ret < 0) {
 		dev_err(dev, "failed to get host clock\n");
-		return clk_id;
+		return ret;
 	}
  
 	/* set to max rate */
-	priv->mclk = clk_set_periph_rate(clk_dev, clk_id, ULONG_MAX);
+	priv->mclk = clk_set_rate(&clk, ULONG_MAX);
 	if (IS_ERR_VALUE(priv->mclk)) {
 		dev_err(dev, "failed to set rate for host clock\n");
+		clk_free(&clk);
 		return priv->mclk;
 	}
  
-	ret = clk_enable(clk_dev, clk_id);
+	ret = clk_enable(&clk);
+	clk_free(&clk);
 	if (ret) {
 		dev_err(dev, "failed to enable host clock\n");
 		return ret;
@@ -150,7 +150,8 @@
 					"clock-frequency", 115200);
 	uint clkd[2]; /* clk_id and clk_no */
 	int clk_offset;
-	struct udevice *clk;
+	struct udevice *clk_dev;
+	struct clk clk;
 	int ret;
  
 	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clock", clkd,
  
@@ -162,11 +163,17 @@
 	if (clk_offset < 0)
 		return clk_offset;
  
-	ret = uclass_get_device_by_of_offset(UCLASS_CLK, clk_offset, &clk);
+	ret = uclass_get_device_by_of_offset(UCLASS_CLK, clk_offset, &clk_dev);
 	if (ret)
 		return ret;
  
-	ret = clk_set_periph_rate(clk, clkd[1], clk_rate);
+	clk.id = clkd[1];
+	ret = clk_request(clk_dev, &clk);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_set_rate(&clk, clk_rate);
+	clk_free(&clk);
 	if (ret < 0)
 		return ret;
  
@@ -135,7 +135,7 @@
 static int pic32_uart_probe(struct udevice *dev)
 {
 	struct pic32_uart_priv *priv = dev_get_priv(dev);
-	struct udevice *clkdev;
+	struct clk clk;
 	fdt_addr_t addr;
 	fdt_size_t size;
 	int ret;
  
@@ -148,10 +148,11 @@
 	priv->base = ioremap(addr, size);
  
 	/* get clock rate */
-	ret = clk_get_by_index(dev, 0, &clkdev);
+	ret = clk_get_by_index(dev, 0, &clk);
 	if (ret < 0)
 		return ret;
-	priv->uartclk = clk_get_periph_rate(clkdev, ret);
+	priv->uartclk = clk_get_rate(&clk);
+	clk_free(&clk);
  
 	/* initialize serial */
 	return pic32_serial_init(priv->base, priv->uartclk, CONFIG_BAUDRATE);
@@ -94,13 +94,13 @@
 	u32 uclk;
  
 #ifdef CONFIG_CLK_EXYNOS
-	struct udevice *clk_dev;
+	struct clk clk;
 	u32 ret;
  
-	ret = clk_get_by_index(dev, 1, &clk_dev);
+	ret = clk_get_by_index(dev, 1, &clk);
 	if (ret < 0)
 		return ret;
-	uclk = clk_get_periph_rate(clk_dev, ret);
+	uclk = clk_get_rate(&clk);
 #else
 	uclk = get_uart_clk(plat->port_id);
 #endif
@@ -35,8 +35,7 @@
  
 struct rockchip_spi_priv {
 	struct rockchip_spi *regs;
-	struct udevice *clk;
-	int clk_id;
+	struct clk clk;
 	unsigned int max_freq;
 	unsigned int mode;
 	ulong last_transaction_us;	/* Time of last transaction end */
@@ -144,7 +143,6 @@
 		      bus->name, ret);
 		return ret;
 	}
-	priv->clk_id = ret;
  
 	plat->frequency = fdtdec_get_int(blob, node, "spi-max-frequency",
 					 50000000);
@@ -175,7 +173,7 @@
 	 * Use 99 MHz as our clock since it divides nicely into 594 MHz which
 	 * is the assumed speed for CLK_GENERAL.
 	 */
-	ret = clk_set_periph_rate(priv->clk, priv->clk_id, 99000000);
+	ret = clk_set_rate(&priv->clk, 99000000);
 	if (ret < 0) {
 		debug("%s: Failed to set clock: %d\n", __func__, ret);
 		return ret;
@@ -26,15 +26,15 @@
 	int i;
  
 	for (i = 0; ; i++) {
-		struct udevice *clk_dev;
-		int clk_id;
+		struct clk clk;
+		int ret;
  
-		clk_id = clk_get_by_index(dev, i, &clk_dev);
-		if (clk_id < 0)
+		ret = clk_get_by_index(dev, i, &clk);
+		if (ret < 0)
 			break;
-		if (clk_enable(clk_dev, clk_id))
-			printf("failed to enable clock (dev=%s, id=%d)\n",
-			       clk_dev->name, clk_id);
+		if (clk_enable(&clk))
+			printf("failed to enable clock %d\n", i);
+		clk_free(&clk);
 	}
  
 	hccr = map_physmem(dev_get_addr(dev), 0x100, MAP_NOCACHE);
@@ -1009,8 +1009,7 @@
 	struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
 	struct rk_edp_priv *priv = dev_get_priv(dev);
 	struct rk3288_edp *regs = priv->regs;
-	struct udevice *clk;
-	int periph;
+	struct clk clk;
 	int ret;
  
 	ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
@@ -1026,8 +1025,8 @@
  
 	ret = clk_get_by_index(dev, 1, &clk);
 	if (ret >= 0) {
-		periph = ret;
-		ret = clk_set_periph_rate(clk, periph, 0);
+		ret = clk_set_rate(&clk, 0);
+		clk_free(&clk);
 	}
 	if (ret) {
 		debug("%s: Failed to set EDP clock: ret=%d\n", __func__, ret);
@@ -1036,8 +1035,8 @@
  
 	ret = clk_get_by_index(uc_plat->src_dev, 0, &clk);
 	if (ret >= 0) {
-		periph = ret;
-		ret = clk_set_periph_rate(clk, periph, 192000000);
+		ret = clk_set_rate(&clk, 192000000);
+		clk_free(&clk);
 	}
 	if (ret < 0) {
 		debug("%s: Failed to set clock in source device '%s': ret=%d\n",
@@ -859,15 +859,15 @@
 {
 	struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
 	struct rk_hdmi_priv *priv = dev_get_priv(dev);
-	struct udevice *reg, *clk;
-	int periph;
+	struct udevice *reg;
+	struct clk clk;
 	int ret;
 	int vop_id = uc_plat->source_id;
  
 	ret = clk_get_by_index(dev, 0, &clk);
 	if (ret >= 0) {
-		periph = ret;
-		ret = clk_set_periph_rate(clk, periph, 0);
+		ret = clk_set_rate(&clk, 0);
+		clk_free(&clk);
 	}
 	if (ret) {
 		debug("%s: Failed to set EDP clock: ret=%d\n", __func__, ret);
@@ -880,8 +880,8 @@
 	 */
 	ret = clk_get_by_index(uc_plat->src_dev, 0, &clk);
 	if (ret >= 0) {
-		periph = ret;
-		ret = clk_set_periph_rate(clk, periph, 384000000);
+		ret = clk_set_rate(&clk, 384000000);
+		clk_free(&clk);
 	}
 	if (ret < 0) {
 		debug("%s: Failed to set clock in source device '%s': ret=%d\n",
@@ -5,7 +5,6 @@
  */
  
 #include <common.h>
-#include <clk.h>
 #include <display.h>
 #include <dm.h>
 #include <edid.h>
@@ -195,7 +195,8 @@
 	struct udevice *disp;
 	int ret, remote, i, offset;
 	struct display_plat *disp_uc_plat;
-	struct udevice *clk;
+	struct udevice *dev_clk;
+	struct clk clk;
  
 	vop_id = fdtdec_get_int(blob, ep_node, "reg", -1);
 	debug("vop_id=%d\n", vop_id);
  
  
@@ -237,11 +238,13 @@
 		return ret;
 	}
  
-	ret = rkclk_get_clk(CLK_NEW, &clk);
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev_clk);
 	if (!ret) {
-		ret = clk_set_periph_rate(clk, DCLK_VOP0 + remote_vop_id,
-					  timing.pixelclock.typ);
+		clk.id = DCLK_VOP0 + remote_vop_id;
+		ret = clk_request(dev_clk, &clk);
 	}
+	if (!ret)
+		ret = clk_set_rate(&clk, timing.pixelclock.typ);
 	if (ret) {
 		debug("%s: Failed to set pixel clock: ret=%d\n", __func__, ret);
 		return ret;
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _CLK_UCLASS_H
+#define _CLK_UCLASS_H
+
+/* See clk.h for background documentation. */
+
+#include <clk.h>
+#include <fdtdec.h>
+
+/**
+ * struct clk_ops - The functions that a clock driver must implement.
+ */
+struct clk_ops {
+	/**
+	 * of_xlate - Translate a client's device-tree (OF) clock specifier.
+	 *
+	 * The clock core calls this function as the first step in implementing
+	 * a client's clk_get_by_*() call.
+	 *
+	 * If this function pointer is set to NULL, the clock core will use a
+	 * default implementation, which assumes #clock-cells = <1>, and that
+	 * the DT cell contains a simple integer clock ID.
+	 *
+	 * At present, the clock API solely supports device-tree. If this
+	 * changes, other xxx_xlate() functions may be added to support those
+	 * other mechanisms.
+	 *
+	 * @clock:	The clock struct to hold the translation result.
+	 * @args:	The clock specifier values from device tree.
+	 * @return 0 if OK, or a negative error code.
+	 */
+	int (*of_xlate)(struct clk *clock,
+			struct fdtdec_phandle_args *args);
+	/**
+	 * request - Request a translated clock.
+	 *
+	 * The clock core calls this function as the second step in
+	 * implementing a client's clk_get_by_*() call, following a successful
+	 * xxx_xlate() call, or as the only step in implementing a client's
+	 * clk_request() call.
+	 *
+	 * @clock:	The clock struct to request; this has been fille in by
+	 *		a previoux xxx_xlate() function call, or by the caller
+	 *		of clk_request().
+	 * @return 0 if OK, or a negative error code.
+	 */
+	int (*request)(struct clk *clock);
+	/**
+	 * free - Free a previously requested clock.
+	 *
+	 * This is the implementation of the client clk_free() API.
+	 *
+	 * @clock:	The clock to free.
+	 * @return 0 if OK, or a negative error code.
+	 */
+	int (*free)(struct clk *clock);
+	/**
+	 * get_rate() - Get current clock rate.
+	 *
+	 * @clk:	The clock to query.
+	 * @return clock rate in Hz, or -ve error code
+	 */
+	ulong (*get_rate)(struct clk *clk);
+	/**
+	 * set_rate() - Set current clock rate.
+	 *
+	 * @clk:	The clock to manipulate.
+	 * @rate:	New clock rate in Hz.
+	 * @return new rate, or -ve error code.
+	 */
+	ulong (*set_rate)(struct clk *clk, ulong rate);
+	/**
+	 * enable() - Enable a clock.
+	 *
+	 * @clk:	The clock to manipulate.
+	 * @return zero on success, or -ve error code.
+	 */
+	int (*enable)(struct clk *clk);
+	/**
+	 * disable() - Disable a clock.
+	 *
+	 * @clk:	The clock to manipulate.
+	 * @return zero on success, or -ve error code.
+	 */
+	int (*disable)(struct clk *clk);
+};
+
+#endif
 /*
  * Copyright (c) 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
+ * Copyright (c) 2016, NVIDIA CORPORATION.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
@@ -8,126 +9,167 @@
 #ifndef _CLK_H_
 #define _CLK_H_
  
-#include <errno.h>
 #include <linux/types.h>
  
+/**
+ * A clock is a hardware signal that oscillates autonomously at a specific
+ * frequency and duty cycle. Most hardware modules require one or more clock
+ * signal to drive their operation. Clock signals are typically generated
+ * externally to the HW module consuming them, by an entity this API calls a
+ * clock provider. This API provides a standard means for drivers to enable and
+ * disable clocks, and to set the rate at which they oscillate.
+ *
+ * A driver that implements UCLASS_CLOCK is a clock provider. A provider will
+ * often implement multiple separate clocks, since the hardware it manages
+ * often has this capability. clock_uclass.h describes the interface which
+ * clock providers must implement.
+ *
+ * Clock consumers/clients are the HW modules driven by the clock signals. This
+ * header file describes the API used by drivers for those HW modules.
+ */
+
 struct udevice;
  
-int soc_clk_dump(void);
-
-struct clk_ops {
-	/**
-	 * get_rate() - Get current clock rate
-	 *
-	 * @dev:	Device to check (UCLASS_CLK)
-	 * @return clock rate in Hz, or -ve error code
+/**
+ * struct clk - A handle to (allowing control of) a single clock.
+ *
+ * Clients provide storage for clock handles. The content of the structure is
+ * managed solely by the clock API and clock drivers. A clock struct is
+ * initialized by "get"ing the clock struct. The clock struct is passed to all
+ * other clock APIs to identify which clock signal to operate upon.
+ *
+ * @dev: The device which implements the clock signal.
+ * @id: The clock signal ID within the provider.
+ *
+ * Currently, the clock API assumes that a single integer ID is enough to
+ * identify and configure any clock signal for any clock provider. If this
+ * assumption becomes invalid in the future, the struct could be expanded to
+ * either (a) add more fields to allow clock providers to store additional
+ * information, or (b) replace the id field with an opaque pointer, which the
+ * provider would dynamically allocated during its .of_xlate op, and process
+ * during is .request op. This may require the addition of an extra op to clean
+ * up the allocation.
+ */
+struct clk {
+	struct udevice *dev;
+	/*
+	 * Written by of_xlate. We assume a single id is enough for now. In the
+	 * future, we might add more fields here.
 	 */
-	ulong (*get_rate)(struct udevice *dev);
+	unsigned long id;
+};
  
-	/**
-	 * set_rate() - Set current clock rate
-	 *
-	 * @dev:	Device to adjust
-	 * @rate:	New clock rate in Hz
-	 * @return new rate, or -ve error code
-	 */
-	ulong (*set_rate)(struct udevice *dev, ulong rate);
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+/**
+ * clock_get_by_index - Get/request a clock by integer index.
+ *
+ * This looks up and requests a clock. The index is relative to the client
+ * device; each device is assumed to have n clocks associated with it somehow,
+ * and this function finds and requests one of them. The mapping of client
+ * device clock indices to provider clocks may be via device-tree properties,
+ * board-provided mapping tables, or some other mechanism.
+ *
+ * @dev:	The client device.
+ * @index:	The index of the clock to request, within the client's list of
+ *		clocks.
+ * @clock	A pointer to a clock struct to initialize.
+ * @return 0 if OK, or a negative error code.
+ */
+int clk_get_by_index(struct udevice *dev, int index, struct clk *clk);
  
-	/**
-	 * enable() - Enable the clock for a peripheral
-	 *
-	 * @dev:	clock provider
-	 * @periph:	Peripheral ID to enable
-	 * @return zero on success, or -ve error code
-	 */
-	int (*enable)(struct udevice *dev, int periph);
+/**
+ * clock_get_by_name - Get/request a clock by name.
+ *
+ * This looks up and requests a clock. The name is relative to the client
+ * device; each device is assumed to have n clocks associated with it somehow,
+ * and this function finds and requests one of them. The mapping of client
+ * device clock names to provider clocks may be via device-tree properties,
+ * board-provided mapping tables, or some other mechanism.
+ *
+ * @dev:	The client device.
+ * @name:	The name of the clock to request, within the client's list of
+ *		clocks.
+ * @clock:	A pointer to a clock struct to initialize.
+ * @return 0 if OK, or a negative error code.
+ */
+int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk);
+#else
+static inline int clk_get_by_index(struct udevice *dev, int index,
+				   struct clk *clk)
+{
+	return -ENOSYS;
+}
  
-	/**
-	 * get_periph_rate() - Get clock rate for a peripheral
-	 *
-	 * @dev:	Device to check (UCLASS_CLK)
-	 * @periph:	Peripheral ID to check
-	 * @return clock rate in Hz, or -ve error code
-	 */
-	ulong (*get_periph_rate)(struct udevice *dev, int periph);
+static int clk_get_by_name(struct udevice *dev, const char *name,
+			   struct clk *clk)
+{
+	return -ENOSYS;
+}
+#endif
  
-	/**
-	 * set_periph_rate() - Set current clock rate for a peripheral
-	 *
-	 * @dev:	Device to update (UCLASS_CLK)
-	 * @periph:	Peripheral ID to update
-	 * @return new clock rate in Hz, or -ve error code
-	 */
-	ulong (*set_periph_rate)(struct udevice *dev, int periph, ulong rate);
-};
-
-#define clk_get_ops(dev)	((struct clk_ops *)(dev)->driver->ops)
-
 /**
- * clk_get_rate() - Get current clock rate
+ * clk_request - Request a clock by provider-specific ID.
  *
- * @dev:	Device to check (UCLASS_CLK)
- * @return clock rate in Hz, or -ve error code
+ * This requests a clock using a provider-specific ID. Generally, this function
+ * should not be used, since clk_get_by_index/name() provide an interface that
+ * better separates clients from intimate knowledge of clock providers.
+ * However, this function may be useful in core SoC-specific code.
+ *
+ * @dev:	The clock provider device.
+ * @clock:	A pointer to a clock struct to initialize. The caller must
+ *		have already initialized any field in this struct which the
+ *		clock provider uses to identify the clock.
+ * @return 0 if OK, or a negative error code.
  */
-ulong clk_get_rate(struct udevice *dev);
+int clk_request(struct udevice *dev, struct clk *clk);
  
 /**
- * clk_set_rate() - Set current clock rate
+ * clock_free - Free a previously requested clock.
  *
- * @dev:	Device to adjust
- * @rate:	New clock rate in Hz
- * @return new rate, or -ve error code
+ * @clock:	A clock struct that was previously successfully requested by
+ *		clk_request/get_by_*().
+ * @return 0 if OK, or a negative error code.
  */
-ulong clk_set_rate(struct udevice *dev, ulong rate);
+int clk_free(struct clk *clk);
  
 /**
- * clk_enable() - Enable the clock for a peripheral
+ * clk_get_rate() - Get current clock rate.
  *
- * @dev:	clock provider
- * @periph:	Peripheral ID to enable
- * @return zero on success, or -ve error code
+ * @clk:	A clock struct that was previously successfully requested by
+ *		clk_request/get_by_*().
+ * @return clock rate in Hz, or -ve error code.
  */
-int clk_enable(struct udevice *dev, int periph);
+ulong clk_get_rate(struct clk *clk);
  
 /**
- * clk_get_periph_rate() - Get current clock rate for a peripheral
+ * clk_set_rate() - Set current clock rate.
  *
- * @dev:	Device to check (UCLASS_CLK)
- * @return clock rate in Hz, -ve error code
+ * @clk:	A clock struct that was previously successfully requested by
+ *		clk_request/get_by_*().
+ * @rate:	New clock rate in Hz.
+ * @return new rate, or -ve error code.
  */
-ulong clk_get_periph_rate(struct udevice *dev, int periph);
+ulong clk_set_rate(struct clk *clk, ulong rate);
  
 /**
- * clk_set_periph_rate() - Set current clock rate for a peripheral
+ * clk_enable() - Enable (turn on) a clock.
  *
- * @dev:	Device to update (UCLASS_CLK)
- * @periph:	Peripheral ID to update
- * @return new clock rate in Hz, or -ve error code
+ * @clk:	A clock struct that was previously successfully requested by
+ *		clk_request/get_by_*().
+ * @return zero on success, or -ve error code.
  */
-ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate);
+int clk_enable(struct clk *clk);
  
-#if CONFIG_IS_ENABLED(OF_CONTROL)
 /**
- * clk_get_by_index() - look up a clock referenced by a device
+ * clk_disable() - Disable (turn off) a clock.
  *
- * Parse a device's 'clocks' list, returning information on the indexed clock,
- * ensuring that it is activated.
- *
- * @dev:	Device containing the clock reference
- * @index:	Clock index to return (0 = first)
- * @clk_devp:	Returns clock device
- * @return:	Peripheral ID for the device to control. This is the first
- *		argument after the clock node phandle. If there is no arguemnt,
- *		returns 0. Return -ve error code on any error
+ * @clk:	A clock struct that was previously successfully requested by
+ *		clk_request/get_by_*().
+ * @return zero on success, or -ve error code.
  */
-int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp);
-#else
-static inline int clk_get_by_index(struct udevice *dev, int index,
-				   struct udevice **clk_devp)
-{
-	return -ENOSYS;
-}
-#endif
+int clk_disable(struct clk *clk);
  
-#endif /* _CLK_H_ */
+int soc_clk_dump(void);
+
+#endif
@@ -5,56 +5,100 @@
  */
  
 #include <common.h>
-#include <clk.h>
 #include <dm.h>
-#include <asm/test.h>
+#include <asm/clk.h>
 #include <dm/test.h>
 #include <linux/err.h>
 #include <test/ut.h>
  
-/* Test that we can find and adjust clocks */
-static int dm_test_clk_base(struct unit_test_state *uts)
+static int dm_test_clk(struct unit_test_state *uts)
 {
-	struct udevice *clk;
+	struct udevice *dev_fixed, *dev_clk, *dev_test;
 	ulong rate;
  
-	ut_assertok(uclass_get_device(UCLASS_CLK, 0, &clk));
-	rate = clk_get_rate(clk);
-	ut_asserteq(SANDBOX_CLK_RATE, rate);
-	ut_asserteq(-EINVAL, clk_set_rate(clk, 0));
-	ut_assertok(clk_set_rate(clk, rate * 2));
-	ut_asserteq(SANDBOX_CLK_RATE * 2, clk_get_rate(clk));
+	ut_assertok(uclass_get_device_by_name(UCLASS_CLK, "clk-fixed",
+					      &dev_fixed));
  
-	return 0;
-}
-DM_TEST(dm_test_clk_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+	ut_assertok(uclass_get_device_by_name(UCLASS_CLK, "clk-sbox",
+					      &dev_clk));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_I2C));
+	ut_asserteq(0, sandbox_clk_query_rate(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(0, sandbox_clk_query_rate(dev_clk, SANDBOX_CLK_ID_I2C));
  
-/* Test that peripheral clocks work as expected */
-static int dm_test_clk_periph(struct unit_test_state *uts)
-{
-	struct udevice *clk;
-	ulong rate;
+	ut_assertok(uclass_get_device_by_name(UCLASS_MISC, "clk-test",
+					      &dev_test));
+	ut_assertok(sandbox_clk_test_get(dev_test));
  
-	ut_assertok(uclass_get_device(UCLASS_CLK, 0, &clk));
-	rate = clk_set_periph_rate(clk, PERIPH_ID_COUNT, 123);
-	ut_asserteq(-EINVAL, rate);
-	ut_asserteq(1, IS_ERR_VALUE(rate));
+	ut_asserteq(1234,
+		    sandbox_clk_test_get_rate(dev_test,
+					      SANDBOX_CLK_TEST_ID_FIXED));
+	ut_asserteq(0, sandbox_clk_test_get_rate(dev_test,
+						 SANDBOX_CLK_TEST_ID_SPI));
+	ut_asserteq(0, sandbox_clk_test_get_rate(dev_test,
+						 SANDBOX_CLK_TEST_ID_I2C));
  
-	rate = clk_set_periph_rate(clk, PERIPH_ID_SPI, 123);
-	ut_asserteq(0, rate);
-	ut_asserteq(123, clk_get_periph_rate(clk, PERIPH_ID_SPI));
+	rate = sandbox_clk_test_set_rate(dev_test, SANDBOX_CLK_TEST_ID_FIXED,
+					 12345);
+	ut_assert(IS_ERR_VALUE(rate));
+	rate = sandbox_clk_test_get_rate(dev_test, SANDBOX_CLK_TEST_ID_FIXED);
+	ut_asserteq(1234, rate);
  
-	rate = clk_set_periph_rate(clk, PERIPH_ID_SPI, 1234);
-	ut_asserteq(123, rate);
+	ut_asserteq(0, sandbox_clk_test_set_rate(dev_test,
+						 SANDBOX_CLK_TEST_ID_SPI,
+						 1000));
+	ut_asserteq(0, sandbox_clk_test_set_rate(dev_test,
+						 SANDBOX_CLK_TEST_ID_I2C,
+						 2000));
  
-	rate = clk_set_periph_rate(clk, PERIPH_ID_I2C, 567);
+	ut_asserteq(1000, sandbox_clk_test_get_rate(dev_test,
+						    SANDBOX_CLK_TEST_ID_SPI));
+	ut_asserteq(2000, sandbox_clk_test_get_rate(dev_test,
+						    SANDBOX_CLK_TEST_ID_I2C));
  
-	rate = clk_set_periph_rate(clk, PERIPH_ID_SPI, 1234);
-	ut_asserteq(1234, rate);
+	ut_asserteq(1000, sandbox_clk_test_set_rate(dev_test,
+						    SANDBOX_CLK_TEST_ID_SPI,
+						    10000));
+	ut_asserteq(2000, sandbox_clk_test_set_rate(dev_test,
+						    SANDBOX_CLK_TEST_ID_I2C,
+						    20000));
  
-	ut_asserteq(567, clk_get_periph_rate(clk, PERIPH_ID_I2C));
+	rate = sandbox_clk_test_set_rate(dev_test, SANDBOX_CLK_TEST_ID_SPI, 0);
+	ut_assert(IS_ERR_VALUE(rate));
+	rate = sandbox_clk_test_set_rate(dev_test, SANDBOX_CLK_TEST_ID_I2C, 0);
+	ut_assert(IS_ERR_VALUE(rate));
  
+	ut_asserteq(10000, sandbox_clk_test_get_rate(dev_test,
+						     SANDBOX_CLK_TEST_ID_SPI));
+	ut_asserteq(20000, sandbox_clk_test_get_rate(dev_test,
+						     SANDBOX_CLK_TEST_ID_I2C));
+
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_I2C));
+	ut_asserteq(10000, sandbox_clk_query_rate(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(20000, sandbox_clk_query_rate(dev_clk, SANDBOX_CLK_ID_I2C));
+
+	ut_assertok(sandbox_clk_test_enable(dev_test, SANDBOX_CLK_TEST_ID_SPI));
+	ut_asserteq(1, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_I2C));
+
+	ut_assertok(sandbox_clk_test_enable(dev_test, SANDBOX_CLK_TEST_ID_I2C));
+	ut_asserteq(1, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(1, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_I2C));
+
+	ut_assertok(sandbox_clk_test_disable(dev_test,
+					     SANDBOX_CLK_TEST_ID_SPI));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(1, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_I2C));
+
+	ut_assertok(sandbox_clk_test_disable(dev_test,
+					     SANDBOX_CLK_TEST_ID_I2C));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_SPI));
+	ut_asserteq(0, sandbox_clk_query_enable(dev_clk, SANDBOX_CLK_ID_I2C));
+
+	ut_assertok(sandbox_clk_test_free(dev_test));
+
 	return 0;
 }
-DM_TEST(dm_test_clk_periph, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+DM_TEST(dm_test_clk, DM_TESTF_SCAN_FDT);
...	...	@@ -62,18 +62,6 @@
62	62	*/
63	63	void *rockchip_get_cru(void);
64	64
65		-/**
66		- * rkclk_get_clk() - get a pointer to a given clock
67		- *
68		- * This is an internal function - use outside the clock subsystem indicates
69		- * that work is needed!
70		- *
71		- * @clk_id: Clock requested
72		- * @devp: Returns a pointer to that clock
73		- * @return 0 if OK, -ve on error
74		- */
75		-int rkclk_get_clk(enum rk_clk_id clk_id, struct udevice **devp);
76		-
77	65	struct rk3288_cru;
78	66	struct rk3288_grf;
79	67
...	...	@@ -9,6 +9,7 @@
9	9	#include <dm.h>
10	10	#include <ram.h>
11	11	#include <asm/io.h>
	12	+#include <asm/arch/clock.h>
12	13
13	14	DECLARE_GLOBAL_DATA_PTR;
14	15
15	16
16	17
...	...	@@ -54,15 +55,43 @@
54	55	static int do_clock(cmd_tbl_t *cmdtp, int flag, int argc,
55	56	char * const argv[])
56	57	{
	58	+ static const struct {
	59	+ char *name;
	60	+ int id;
	61	+ } clks[] = {
	62	+ { "osc", CLK_OSC },
	63	+ { "apll", CLK_ARM },
	64	+ { "dpll", CLK_DDR },
	65	+ { "cpll", CLK_CODEC },
	66	+ { "gpll", CLK_GENERAL },
	67	+#ifdef CONFIG_ROCKCHIP_RK3036
	68	+ { "mpll", CLK_NEW },
	69	+#else
	70	+ { "npll", CLK_NEW },
	71	+#endif
	72	+ };
	73	+ int ret, i;
57	74	struct udevice *dev;
58	75
59		- for (uclass_first_device(UCLASS_CLK, &dev);
60		- dev;
61		- uclass_next_device(&dev)) {
	76	+ ret = uclass_get_device(UCLASS_CLK, 0, &dev);
	77	+ if (ret) {
	78	+ printf("clk-uclass not found\n");
	79	+ return 0;
	80	+ }
	81	+
	82	+ for (i = 0; i < ARRAY_SIZE(clks); i++) {
	83	+ struct clk clk;
62	84	ulong rate;
63	85
64		- rate = clk_get_rate(dev);
65		- printf("%s: %lu\n", dev->name, rate);
	86	+ clk.id = clks[i].id;
	87	+ ret = clk_request(dev, &clk);
	88	+ if (ret < 0)
	89	+ continue;
	90	+
	91	+ rate = clk_get_rate(&clk);
	92	+ printf("%s: %lu\n", clks[i].name, rate);
	93	+
	94	+ clk_free(&clk);
66	95	}
67	96
68	97	return 0;
...	...	@@ -36,7 +36,7 @@
36	36	struct dram_info {
37	37	struct chan_info chan[2];
38	38	struct ram_info info;
39		- struct udevice *ddr_clk;
	39	+ struct clk ddr_clk;
40	40	struct rk3288_cru *cru;
41	41	struct rk3288_grf *grf;
42	42	struct rk3288_sgrf *sgrf;
...	...	@@ -576,7 +576,7 @@
576	576	rk_clrsetreg(&dram->sgrf->soc_con2, 0x1f, sdram_params->base.stride);
577	577	}
578	578
579		-static int sdram_init(const struct dram_info *dram,
	579	+static int sdram_init(struct dram_info *dram,
580	580	const struct rk3288_sdram_params *sdram_params)
581	581	{
582	582	int channel;
...	...	@@ -592,8 +592,8 @@
592	592	return -E2BIG;
593	593	}
594	594
595		- debug("ddr clk %s\n", dram->ddr_clk->name);
596		- ret = clk_set_rate(dram->ddr_clk, sdram_params->base.ddr_freq);
	595	+ debug("ddr clk dpll\n");
	596	+ ret = clk_set_rate(&dram->ddr_clk, sdram_params->base.ddr_freq);
597	597	debug("ret=%d\n", ret);
598	598	if (ret) {
599	599	debug("Could not set DDR clock\n");
...	...	@@ -836,6 +836,7 @@
836	836	struct dram_info *priv = dev_get_priv(dev);
837	837	struct regmap *map;
838	838	int ret;
	839	+ struct udevice *dev_clk;
839	840
840	841	map = syscon_get_regmap_by_driver_data(ROCKCHIP_SYSCON_NOC);
841	842	if (IS_ERR(map))
...	...	@@ -856,7 +857,11 @@
856	857	priv->chan[1].pctl = regmap_get_range(map, 2);
857	858	priv->chan[1].publ = regmap_get_range(map, 3);
858	859
859		- ret = uclass_get_device(UCLASS_CLK, CLK_DDR, &priv->ddr_clk);
	860	+ ret = uclass_get_device(UCLASS_CLK, 0, &dev_clk);
	861	+ if (ret)
	862	+ return ret;
	863	+ priv->ddr_clk.id = CLK_DDR;
	864	+ ret = clk_request(dev_clk, &priv->ddr_clk);
860	865	if (ret)
861	866	return ret;
862	867
...	...	@@ -9,7 +9,7 @@
9	9	*/
10	10
11	11	#include <common.h>
12		-#include <clk.h>
	12	+#include <clk-uclass.h>
13	13	#include <dm.h>
14	14	#include <errno.h>
15	15	#include <asm/io.h>
16	16
17	17
...	...	@@ -212,11 +212,11 @@
212	212	return 0;
213	213	}
214	214
215		-ulong msm_set_periph_rate(struct udevice *dev, int periph, ulong rate)
	215	+ulong msm_set_rate(struct clk *clk, ulong rate)
216	216	{
217		- struct msm_clk_priv *priv = dev_get_priv(dev);
	217	+ struct msm_clk_priv *priv = dev_get_priv(clk->dev);
218	218
219		- switch (periph) {
	219	+ switch (clk->id) {
220	220	case 0: /* SDC1 */
221	221	return clk_init_sdc(priv, 0, rate);
222	222	break;
...	...	@@ -243,7 +243,7 @@
243	243	}
244	244
245	245	static struct clk_ops msm_clk_ops = {
246		- .set_periph_rate = msm_set_periph_rate,
	246	+ .set_rate = msm_set_rate,
247	247	};
248	248
249	249	static const struct udevice_id msm_clk_ids[] = {
...	...	@@ -6,7 +6,6 @@
6	6	*/
7	7	#include <common.h>
8	8	#include <errno.h>
9		-#include <clk.h>
10	9	#include <asm/io.h>
11	10	#include <asm/arch/hardware.h>
12	11	#include <asm/arch/clk.h>
...	...	@@ -23,20 +23,36 @@
23	23
24	24	DECLARE_GLOBAL_DATA_PTR;
25	25
26		-static ulong clk_get_cpu_rate(void)
	26	+static ulong rate(int id)
27	27	{
28	28	int ret;
29	29	struct udevice *dev;
	30	+ struct clk clk;
	31	+ ulong rate;
30	32
31	33	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
32	34	if (ret) {
33		- panic("uclass-clk: device not found\n");
	35	+ printf("clk-uclass not found\n");
34	36	return 0;
35	37	}
36	38
37		- return clk_get_rate(dev);
	39	+ clk.id = id;
	40	+ ret = clk_request(dev, &clk);
	41	+ if (ret < 0)
	42	+ return ret;
	43	+
	44	+ rate = clk_get_rate(&clk);
	45	+
	46	+ clk_free(&clk);
	47	+
	48	+ return rate;
38	49	}
39	50
	51	+static ulong clk_get_cpu_rate(void)
	52	+{
	53	+ return rate(PB7CLK);
	54	+}
	55	+
40	56	/* initialize prefetch module related to cpu_clk */
41	57	static void prefetch_init(void)
42	58	{
43	59
44	60
45	61
46	62
47	63
48	64
...	...	@@ -127,30 +143,25 @@
127	143	}
128	144	#endif
129	145	#ifdef CONFIG_CMD_CLK
	146	+
130	147	int soc_clk_dump(void)
131	148	{
132		- int i, ret;
133		- struct udevice *dev;
	149	+ int i;
134	150
135		- ret = uclass_get_device(UCLASS_CLK, 0, &dev);
136		- if (ret) {
137		- printf("clk-uclass not found\n");
138		- return ret;
139		- }
140		-
141	151	printf("PLL Speed: %lu MHz\n",
142		- CLK_MHZ(clk_get_periph_rate(dev, PLLCLK)));
143		- printf("CPU Speed: %lu MHz\n", CLK_MHZ(clk_get_rate(dev)));
144		- printf("MPLL Speed: %lu MHz\n",
145		- CLK_MHZ(clk_get_periph_rate(dev, MPLL)));
	152	+ CLK_MHZ(rate(PLLCLK)));
146	153
	154	+ printf("CPU Speed: %lu MHz\n", CLK_MHZ(rate(PB7CLK)));
	155	+
	156	+ printf("MPLL Speed: %lu MHz\n", CLK_MHZ(rate(MPLL)));
	157	+
147	158	for (i = PB1CLK; i <= PB7CLK; i++)
148	159	printf("PB%d Clock Speed: %lu MHz\n", i - PB1CLK + 1,
149		- CLK_MHZ(clk_get_periph_rate(dev, i)));
	160	+ CLK_MHZ(rate(i)));
150	161
151	162	for (i = REF1CLK; i <= REF5CLK; i++)
152	163	printf("REFO%d Clock Speed: %lu MHz\n", i - REF1CLK + 1,
153		- CLK_MHZ(clk_get_periph_rate(dev, i)));
	164	+ CLK_MHZ(rate(i)));
154	165	return 0;
155	166	}
156	167	#endif
...	...	@@ -108,8 +108,23 @@
108	108	compatible = "denx,u-boot-fdt-test";
109	109	};
110	110
111		- clk@0 {
	111	+ clk_fixed: clk-fixed {
	112	+ compatible = "fixed-clock";
	113	+ #clock-cells = <0>;
	114	+ clock-frequency = <1234>;
	115	+ };
	116	+
	117	+ clk_sandbox: clk-sbox {
112	118	compatible = "sandbox,clk";
	119	+ #clock-cells = <1>;
	120	+ };
	121	+
	122	+ clk-test {
	123	+ compatible = "sandbox,clk-test";
	124	+ clocks = <&clk_fixed>,
	125	+ <&clk_sandbox 1>,
	126	+ <&clk_sandbox 0>;
	127	+ clock-names = "fixed", "i2c", "spi";
113	128	};
114	129
115	130	eth@10002000 {
	1	+/*
	2	+ * Copyright (c) 2016, NVIDIA CORPORATION.
	3	+ *
	4	+ * SPDX-License-Identifier: GPL-2.0
	5	+ */
	6	+
	7	+#ifndef __SANDBOX_CLK_H
	8	+#define __SANDBOX_CLK_H
	9	+
	10	+#include <common.h>
	11	+
	12	+struct udevice;
	13	+
	14	+/**
	15	+ * enum sandbox_clk_id - Identity of clocks implemented by the sandbox clock
	16	+ * provider.
	17	+ *
	18	+ * These IDs are within/relative-to the clock provider.
	19	+ */
	20	+enum sandbox_clk_id {
	21	+ SANDBOX_CLK_ID_SPI,
	22	+ SANDBOX_CLK_ID_I2C,
	23	+
	24	+ SANDBOX_CLK_ID_COUNT,
	25	+};
	26	+
	27	+/**
	28	+ * enum sandbox_clk_test_id - Identity of the clocks consumed by the sandbox
	29	+ * clock test device.
	30	+ *
	31	+ * These are the IDs the clock consumer knows the clocks as.
	32	+ */
	33	+enum sandbox_clk_test_id {
	34	+ SANDBOX_CLK_TEST_ID_FIXED,
	35	+ SANDBOX_CLK_TEST_ID_SPI,
	36	+ SANDBOX_CLK_TEST_ID_I2C,
	37	+
	38	+ SANDBOX_CLK_TEST_ID_COUNT,
	39	+};
	40	+
	41	+/**
	42	+ * sandbox_clk_query_rate - Query the current rate of a sandbox clock.
	43	+ *
	44	+ * @dev: The sandbox clock provider device.
	45	+ * @id: The clock to query.
	46	+ * @return: The rate of the clock.
	47	+ */
	48	+ulong sandbox_clk_query_rate(struct udevice *dev, int id);
	49	+/**
	50	+ * sandbox_clk_query_enable - Query the enable state of a sandbox clock.
	51	+ *
	52	+ * @dev: The sandbox clock provider device.
	53	+ * @id: The clock to query.
	54	+ * @return: The rate of the clock.
	55	+ */
	56	+int sandbox_clk_query_enable(struct udevice *dev, int id);
	57	+
	58	+/**
	59	+ * sandbox_clk_test_get - Ask the sandbox clock test device to request its
	60	+ * clocks.
	61	+ *
	62	+ * @dev: The sandbox clock test (client) devivce.
	63	+ * @return: 0 if OK, or a negative error code.
	64	+ */
	65	+int sandbox_clk_test_get(struct udevice *dev);
	66	+/**
	67	+ * sandbox_clk_test_get_rate - Ask the sandbox clock test device to query a
	68	+ * clock's rate.
	69	+ *
	70	+ * @dev: The sandbox clock test (client) devivce.
	71	+ * @id: The test device's clock ID to query.
	72	+ * @return: The rate of the clock.
	73	+ */
	74	+ulong sandbox_clk_test_get_rate(struct udevice *dev, int id);
	75	+/**
	76	+ * sandbox_clk_test_set_rate - Ask the sandbox clock test device to set a
	77	+ * clock's rate.
	78	+ *
	79	+ * @dev: The sandbox clock test (client) devivce.
	80	+ * @id: The test device's clock ID to configure.
	81	+ * @return: The new rate of the clock.
	82	+ */
	83	+ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate);
	84	+/**
	85	+ * sandbox_clk_test_enable - Ask the sandbox clock test device to enable a
	86	+ * clock.
	87	+ *
	88	+ * @dev: The sandbox clock test (client) devivce.
	89	+ * @id: The test device's clock ID to configure.
	90	+ * @return: 0 if OK, or a negative error code.
	91	+ */
	92	+int sandbox_clk_test_enable(struct udevice *dev, int id);
	93	+/**
	94	+ * sandbox_clk_test_disable - Ask the sandbox clock test device to disable a
	95	+ * clock.
	96	+ *
	97	+ * @dev: The sandbox clock test (client) devivce.
	98	+ * @id: The test device's clock ID to configure.
	99	+ * @return: 0 if OK, or a negative error code.
	100	+ */
	101	+int sandbox_clk_test_disable(struct udevice *dev, int id);
	102	+/**
	103	+ * sandbox_clk_test_free - Ask the sandbox clock test device to free its
	104	+ * clocks.
	105	+ *
	106	+ * @dev: The sandbox clock test (client) devivce.
	107	+ * @return: 0 if OK, or a negative error code.
	108	+ */
	109	+int sandbox_clk_test_free(struct udevice *dev);
	110	+
	111	+#endif
...	...	@@ -19,15 +19,6 @@
19	19
20	20	#define SANDBOX_CLK_RATE 32768
21	21
22		-enum {
23		- PERIPH_ID_FIRST = 0,
24		- PERIPH_ID_SPI = PERIPH_ID_FIRST,
25		- PERIPH_ID_I2C,
26		- PERIPH_ID_PCI,
27		-
28		- PERIPH_ID_COUNT,
29		-};
30		-
31	22	/* System controller driver data */
32	23	enum {
33	24	SYSCON0 = 32,
...	...	@@ -11,20 +11,31 @@
11	11	#include <common.h>
12	12	#include <dm.h>
13	13	#include <clk.h>
	14	+#include <dt-bindings/clock/microchip,clock.h>
14	15	#include <mach/pic32.h>
15	16
16	17	#ifdef CONFIG_DISPLAY_BOARDINFO
17	18	int checkboard(void)
18	19	{
19		- ulong rate = 0;
	20	+ ulong rate;
20	21	struct udevice *dev;
	22	+ struct clk clk;
	23	+ int ret;
21	24
22	25	printf("Core: %s\n", get_core_name());
23	26
24		- if (!uclass_get_device(UCLASS_CLK, 0, &dev)) {
25		- rate = clk_get_rate(dev);
26		- printf("CPU Speed: %lu MHz\n", rate / 1000000);
27		- }
	27	+ if (uclass_get_device(UCLASS_CLK, 0, &dev))
	28	+ return 0;
	29	+
	30	+ clk.id = PB7CLK;
	31	+ ret = clk_request(dev, &clk);
	32	+ if (ret < 0)
	33	+ return 0;
	34	+
	35	+ rate = clk_get_rate(&clk);
	36	+ printf("CPU Speed: %lu MHz\n", rate / 1000000);
	37	+
	38	+ clk_free(&clk);
28	39
29	40	return 0;
30	41	}