power: Add base support for the RK808 PMIC

This Rockchip PMIC provides features suitable for battery-powered applications. It is commonly used with Rockchip SoCs. Add a driver which provides register access. The regulator driver will use this. Signed-off-by: Simon Glass <sjg@chromium.org>

power: Add base support for the RK808 PMIC
This Rockchip PMIC provides features suitable for battery-powered applications. It is commonly used with Rockchip SoCs. Add a driver which provides register access. The regulator driver will use this. Signed-off-by: Simon Glass <sjg@chromium.org>
Simon Glass
1 parent 61101e0583
Showing 4 changed files with 183 additions and 0 deletions Side-by-side Diff
drivers/power/pmic/Kconfig
drivers/power/pmic/Makefile
drivers/power/pmic/rk808.c
include/power/rk808_pmic.h
@@ -33,6 +33,15 @@
 	This config enables implementation of driver-model pmic uclass features
 	for PMIC MAX77686. The driver implements read/write operations.
  
+config PMIC_RK808
+	bool "Enable support for Rockchip PMIC RK808"
+	depends on DM_PMIC
+	---help---
+	The Rockchip RK808 PMIC provides four buck DC-DC convertors, 8 LDOs,
+	an RTC and two low Rds (resistance (drain to source)) switches. It is
+	accessed via an I2C interface. The device is used with Rockchip SoCs.
+	This driver implements register read/write operations.
+
 config PMIC_S2MPS11
 	bool "Enable Driver Model for PMIC Samsung S2MPS11"
 	depends on DM_PMIC
@@ -11,6 +11,7 @@
 obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o
 obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
 obj-$(CONFIG_PMIC_ACT8846) += act8846.o
+obj-$(CONFIG_PMIC_RK808) += rk808.o
 obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
 obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
  
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <power/rk808_pmic.h>
+#include <power/pmic.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "DCDC_REG", .driver = "rk808_buck"},
+	{ .prefix = "LDO_REG", .driver = "rk808_ldo"},
+	{ .prefix = "SWITCH_REG", .driver = "rk808_switch"},
+	{ },
+};
+
+static int rk808_reg_count(struct udevice *dev)
+{
+	return RK808_NUM_OF_REGS;
+}
+
+static int rk808_write(struct udevice *dev, uint reg, const uint8_t *buff,
+			  int len)
+{
+	if (dm_i2c_write(dev, reg, buff, len)) {
+		debug("write error to device: %p register: %#x!", dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int rk808_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	if (dm_i2c_read(dev, reg, buff, len)) {
+		debug("read error from device: %p register: %#x!", dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
+static int rk808_bind(struct udevice *dev)
+{
+	const void *blob = gd->fdt_blob;
+	int regulators_node;
+	int children;
+
+	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+					     "regulators");
+	if (regulators_node <= 0) {
+		debug("%s: %s regulators subnode not found!", __func__,
+		      dev->name);
+		return -ENXIO;
+	}
+
+	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
+
+	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+	if (!children)
+		debug("%s: %s - no child found\n", __func__, dev->name);
+
+	/* Always return success for this device */
+	return 0;
+}
+#endif
+
+static struct dm_pmic_ops rk808_ops = {
+	.reg_count = rk808_reg_count,
+	.read = rk808_read,
+	.write = rk808_write,
+};
+
+static const struct udevice_id rk808_ids[] = {
+	{ .compatible = "rockchip,rk808" },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_rk808) = {
+	.name = "rk808 pmic",
+	.id = UCLASS_PMIC,
+	.of_match = rk808_ids,
+#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
+	.bind = rk808_bind,
+#endif
+	.ops = &rk808_ops,
+};
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _PMIC_RK808_H_
+#define _PMIC_RK808_H_
+
+enum {
+	REG_DCDC_EN			= 0x23,
+	REG_LDO_EN,
+	REG_SLEEP_SET_OFF1,
+	REG_SLEEP_SET_OFF2,
+	REG_DCDC_UV_STS,
+
+	REG_DCDC_UV_ACT,
+	REG_LDO_UV_STS,
+	REG_LDO_UV_ACT,
+	REG_DCDC_PG,
+	REG_LDO_PG,
+	REG_VOUT_MON_TDB,
+	REG_BUCK1_CONFIG,
+	REG_BUCK1_ON_VSEL,
+
+	REG_BUCK1_SLP_VSEL,
+	REG_BUCK1_DVS_VSEL,
+	REG_BUCK2_CONFIG,
+	REG_BUCK2_ON_VSEL,
+	REG_BUCK2_SLP_VSEL,
+	REG_BUCK2_DVS_VSEL,
+	REG_BUCK3_CONFIG,
+	REG_BUCK4_CONFIG,
+
+	REG_BUCK4_ON_VSEL,
+	REG_BUCK4_SLP_VSEL,
+	LDO1_ON_VSEL			= 0x3b,
+	LDO1_SLP_VSEL,
+	LDO2_ON_VSEL,
+	LDO2_SLP_VSEL,
+	LDO3_ON_VSEL,
+
+	LDO3_SLP_VSEL,
+	LDO4_ON_VSEL,
+	LDO4_SLP_VSEL,
+	LDO5_ON_VSEL,
+	LDO5_SLP_VSEL,
+	LDO6_ON_VSEL,
+	LDO6_SLP_VSEL,
+	LDO7_ON_VSEL,
+
+	LDO7_SLP_VSEL,
+	LDO8_ON_VSEL,
+	LDO8_SLP_VSEL,
+	DEVCTRL,
+	INT_STS1,
+	INT_STS_MSK1,
+	INT_STS2,
+	INT_STS_MSK2,
+	IO_POL,
+
+	/* Not sure what this does */
+	DCDC_ILMAX			= 0x90,
+
+	RK808_NUM_OF_REGS,
+};
+
+struct rk808_reg_table {
+	char *name;
+	u8 reg_ctl;
+	u8 reg_vol;
+};
+
+int rk808_spl_configure_buck(struct udevice *pmic, int buck, int uvolt);
+
+#endif
...	...	@@ -33,6 +33,15 @@
33	33	This config enables implementation of driver-model pmic uclass features
34	34	for PMIC MAX77686. The driver implements read/write operations.
35	35
	36	+config PMIC_RK808
	37	+ bool "Enable support for Rockchip PMIC RK808"
	38	+ depends on DM_PMIC
	39	+ ---help---
	40	+ The Rockchip RK808 PMIC provides four buck DC-DC convertors, 8 LDOs,
	41	+ an RTC and two low Rds (resistance (drain to source)) switches. It is
	42	+ accessed via an I2C interface. The device is used with Rockchip SoCs.
	43	+ This driver implements register read/write operations.
	44	+
36	45	config PMIC_S2MPS11
37	46	bool "Enable Driver Model for PMIC Samsung S2MPS11"
38	47	depends on DM_PMIC
...	...	@@ -11,6 +11,7 @@
11	11	obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o
12	12	obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
13	13	obj-$(CONFIG_PMIC_ACT8846) += act8846.o
	14	+obj-$(CONFIG_PMIC_RK808) += rk808.o
14	15	obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
15	16	obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
16	17
	1	+/*
	2	+ * Copyright (C) 2015 Google, Inc
	3	+ * Written by Simon Glass <sjg@chromium.org>
	4	+ *
	5	+ * SPDX-License-Identifier: GPL-2.0+
	6	+ */
	7	+
	8	+#include <common.h>
	9	+#include <dm.h>
	10	+#include <errno.h>
	11	+#include <fdtdec.h>
	12	+#include <libfdt.h>
	13	+#include <power/rk808_pmic.h>
	14	+#include <power/pmic.h>
	15	+
	16	+DECLARE_GLOBAL_DATA_PTR;
	17	+
	18	+static const struct pmic_child_info pmic_children_info[] = {
	19	+ { .prefix = "DCDC_REG", .driver = "rk808_buck"},
	20	+ { .prefix = "LDO_REG", .driver = "rk808_ldo"},
	21	+ { .prefix = "SWITCH_REG", .driver = "rk808_switch"},
	22	+ { },
	23	+};
	24	+
	25	+static int rk808_reg_count(struct udevice *dev)
	26	+{
	27	+ return RK808_NUM_OF_REGS;
	28	+}
	29	+
	30	+static int rk808_write(struct udevice dev, uint reg, const uint8_t buff,
	31	+ int len)
	32	+{
	33	+ if (dm_i2c_write(dev, reg, buff, len)) {
	34	+ debug("write error to device: %p register: %#x!", dev, reg);
	35	+ return -EIO;
	36	+ }
	37	+
	38	+ return 0;
	39	+}
	40	+
	41	+static int rk808_read(struct udevice dev, uint reg, uint8_t buff, int len)
	42	+{
	43	+ if (dm_i2c_read(dev, reg, buff, len)) {
	44	+ debug("read error from device: %p register: %#x!", dev, reg);
	45	+ return -EIO;
	46	+ }
	47	+
	48	+ return 0;
	49	+}
	50	+
	51	+#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
	52	+static int rk808_bind(struct udevice *dev)
	53	+{
	54	+ const void *blob = gd->fdt_blob;
	55	+ int regulators_node;
	56	+ int children;
	57	+
	58	+ regulators_node = fdt_subnode_offset(blob, dev->of_offset,
	59	+ "regulators");
	60	+ if (regulators_node <= 0) {
	61	+ debug("%s: %s regulators subnode not found!", __func__,
	62	+ dev->name);
	63	+ return -ENXIO;
	64	+ }
	65	+
	66	+ debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
	67	+
	68	+ children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	69	+ if (!children)
	70	+ debug("%s: %s - no child found\n", __func__, dev->name);
	71	+
	72	+ /* Always return success for this device */
	73	+ return 0;
	74	+}
	75	+#endif
	76	+
	77	+static struct dm_pmic_ops rk808_ops = {
	78	+ .reg_count = rk808_reg_count,
	79	+ .read = rk808_read,
	80	+ .write = rk808_write,
	81	+};
	82	+
	83	+static const struct udevice_id rk808_ids[] = {
	84	+ { .compatible = "rockchip,rk808" },
	85	+ { }
	86	+};
	87	+
	88	+U_BOOT_DRIVER(pmic_rk808) = {
	89	+ .name = "rk808 pmic",
	90	+ .id = UCLASS_PMIC,
	91	+ .of_match = rk808_ids,
	92	+#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
	93	+ .bind = rk808_bind,
	94	+#endif
	95	+ .ops = &rk808_ops,
	96	+};