dm: power: Add a new driver for the TPS65090 PMIC

The existing TPS65090 driver does not support driver model. Add a new one that does. This can be used as a base for a regulator driver also. It uses the standard device tree binding. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>

dm: power: Add a new driver for the TPS65090 PMIC
The existing TPS65090 driver does not support driver model. Add a new one that does. This can be used as a base for a regulator driver also. It uses the standard device tree binding. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Simon Glass
1 parent 7fb57396e6
Showing 4 changed files with 160 additions and 0 deletions Side-by-side Diff
drivers/power/pmic/Kconfig
drivers/power/pmic/Makefile
drivers/power/pmic/tps65090.c
include/power/tps65090.h
@@ -41,4 +41,13 @@
 	  - set by i2c emul driver's probe() (defaults in header)
  
 	Driver binding info: doc/device-tree-bindings/pmic/sandbox.txt
+
+config PMIC_TPS65090
+	bool "Enable driver for Texas Instruments TPS65090 PMIC"
+	depends on DM_PMIC
+	---help---
+	The TPS65090 is a PMIC containing several LDOs, DC to DC convertors,
+	FETs and a battery charger. This driver provides register access
+	only, and you can enable the regulator/charger drivers separately if
+	required.
@@ -8,6 +8,7 @@
 obj-$(CONFIG_DM_PMIC) += pmic-uclass.o
 obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
 obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
+obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
 obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
 obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o
 obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.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 <i2c.h>
+#include <power/pmic.h>
+#include <power/tps65090.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "fet", .driver = TPS65090_FET_DRIVER },
+	{ },
+};
+
+static int tps65090_reg_count(struct udevice *dev)
+{
+	return TPS65090_NUM_REGS;
+}
+
+static int tps65090_write(struct udevice *dev, uint reg, const uint8_t *buff,
+			  int len)
+{
+	if (dm_i2c_write(dev, reg, buff, len)) {
+		error("write error to device: %p register: %#x!", dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int tps65090_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	int ret;
+
+	ret = dm_i2c_read(dev, reg, buff, len);
+	if (ret) {
+		error("read error %d from device: %p register: %#x!", ret, dev,
+		      reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int tps65090_bind(struct udevice *dev)
+{
+	int regulators_node;
+	const void *blob = gd->fdt_blob;
+	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;
+}
+
+static struct dm_pmic_ops tps65090_ops = {
+	.reg_count = tps65090_reg_count,
+	.read = tps65090_read,
+	.write = tps65090_write,
+};
+
+static const struct udevice_id tps65090_ids[] = {
+	{ .compatible = "ti,tps65090" },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_tps65090) = {
+	.name = "tps65090 pmic",
+	.id = UCLASS_PMIC,
+	.of_match = tps65090_ids,
+	.bind = tps65090_bind,
+	.ops = &tps65090_ops,
+};
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __TPS65090_PMIC_H_
+#define __TPS65090_PMIC_H_
+
+/* I2C device address for TPS65090 PMU */
+#define TPS65090_I2C_ADDR	0x48
+
+/* TPS65090 register addresses */
+enum {
+	REG_IRQ1 = 0,
+	REG_CG_CTRL0 = 4,
+	REG_CG_STATUS1 = 0xa,
+	REG_FET_BASE = 0xe,	/* Not a real register, FETs count from here */
+	REG_FET1_CTRL,
+	REG_FET2_CTRL,
+	REG_FET3_CTRL,
+	REG_FET4_CTRL,
+	REG_FET5_CTRL,
+	REG_FET6_CTRL,
+	REG_FET7_CTRL,
+	TPS65090_NUM_REGS,
+};
+
+enum {
+	IRQ1_VBATG = 1 << 3,
+	CG_CTRL0_ENC_MASK	= 0x01,
+
+	MAX_FET_NUM	= 7,
+	MAX_CTRL_READ_TRIES = 5,
+
+	/* TPS65090 FET_CTRL register values */
+	FET_CTRL_TOFET		= 1 << 7,  /* Timeout, startup, overload */
+	FET_CTRL_PGFET		= 1 << 4,  /* Power good for FET status */
+	FET_CTRL_WAIT		= 3 << 2,  /* Overcurrent timeout max */
+	FET_CTRL_ADENFET	= 1 << 1,  /* Enable output auto discharge */
+	FET_CTRL_ENFET		= 1 << 0,  /* Enable FET */
+};
+
+enum {
+	/* Status register fields */
+	TPS65090_ST1_OTC	= 1 << 0,
+	TPS65090_ST1_OCC	= 1 << 1,
+	TPS65090_ST1_STATE_SHIFT = 4,
+	TPS65090_ST1_STATE_MASK	= 0xf << TPS65090_ST1_STATE_SHIFT,
+};
+
+/* Drivers name */
+#define TPS65090_FET_DRIVER	"tps65090_fet"
+
+#endif /* __TPS65090_PMIC_H_ */
...	...	@@ -41,4 +41,13 @@
41	41	- set by i2c emul driver's probe() (defaults in header)
42	42
43	43	Driver binding info: doc/device-tree-bindings/pmic/sandbox.txt
	44	+
	45	+config PMIC_TPS65090
	46	+ bool "Enable driver for Texas Instruments TPS65090 PMIC"
	47	+ depends on DM_PMIC
	48	+ ---help---
	49	+ The TPS65090 is a PMIC containing several LDOs, DC to DC convertors,
	50	+ FETs and a battery charger. This driver provides register access
	51	+ only, and you can enable the regulator/charger drivers separately if
	52	+ required.
...	...	@@ -8,6 +8,7 @@
8	8	obj-$(CONFIG_DM_PMIC) += pmic-uclass.o
9	9	obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
10	10	obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
	11	+obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
11	12	obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
12	13	obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o
13	14	obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
	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 <i2c.h>
	13	+#include <power/pmic.h>
	14	+#include <power/tps65090.h>
	15	+
	16	+DECLARE_GLOBAL_DATA_PTR;
	17	+
	18	+static const struct pmic_child_info pmic_children_info[] = {
	19	+ { .prefix = "fet", .driver = TPS65090_FET_DRIVER },
	20	+ { },
	21	+};
	22	+
	23	+static int tps65090_reg_count(struct udevice *dev)
	24	+{
	25	+ return TPS65090_NUM_REGS;
	26	+}
	27	+
	28	+static int tps65090_write(struct udevice dev, uint reg, const uint8_t buff,
	29	+ int len)
	30	+{
	31	+ if (dm_i2c_write(dev, reg, buff, len)) {
	32	+ error("write error to device: %p register: %#x!", dev, reg);
	33	+ return -EIO;
	34	+ }
	35	+
	36	+ return 0;
	37	+}
	38	+
	39	+static int tps65090_read(struct udevice dev, uint reg, uint8_t buff, int len)
	40	+{
	41	+ int ret;
	42	+
	43	+ ret = dm_i2c_read(dev, reg, buff, len);
	44	+ if (ret) {
	45	+ error("read error %d from device: %p register: %#x!", ret, dev,
	46	+ reg);
	47	+ return -EIO;
	48	+ }
	49	+
	50	+ return 0;
	51	+}
	52	+
	53	+static int tps65090_bind(struct udevice *dev)
	54	+{
	55	+ int regulators_node;
	56	+ const void *blob = gd->fdt_blob;
	57	+ int children;
	58	+
	59	+ regulators_node = fdt_subnode_offset(blob, dev->of_offset,
	60	+ "regulators");
	61	+ if (regulators_node <= 0) {
	62	+ debug("%s: %s regulators subnode not found!", __func__,
	63	+ dev->name);
	64	+ return -ENXIO;
	65	+ }
	66	+
	67	+ debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
	68	+
	69	+ children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	70	+ if (!children)
	71	+ debug("%s: %s - no child found\n", __func__, dev->name);
	72	+
	73	+ /* Always return success for this device */
	74	+ return 0;
	75	+}
	76	+
	77	+static struct dm_pmic_ops tps65090_ops = {
	78	+ .reg_count = tps65090_reg_count,
	79	+ .read = tps65090_read,
	80	+ .write = tps65090_write,
	81	+};
	82	+
	83	+static const struct udevice_id tps65090_ids[] = {
	84	+ { .compatible = "ti,tps65090" },
	85	+ { }
	86	+};
	87	+
	88	+U_BOOT_DRIVER(pmic_tps65090) = {
	89	+ .name = "tps65090 pmic",
	90	+ .id = UCLASS_PMIC,
	91	+ .of_match = tps65090_ids,
	92	+ .bind = tps65090_bind,
	93	+ .ops = &tps65090_ops,
	94	+};