power: pmic: Palmas: Add the base pmic support

Add support to bind the regulators/child nodes with the pmic. Also adds the pmic i2c based read/write funtions to access pmic registers. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>

power: pmic: Palmas: Add the base pmic support
Add support to bind the regulators/child nodes with the pmic. Also adds the pmic i2c based read/write funtions to access pmic registers. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Keerthy · Simon Glass
1 parent 34514b8b9c
Showing 4 changed files with 137 additions and 0 deletions Side-by-side Diff
drivers/power/pmic/Kconfig
drivers/power/pmic/Makefile
drivers/power/pmic/palmas.c
include/power/palmas.h
@@ -143,4 +143,11 @@
 	FETs and a battery charger. This driver provides register access
 	only, and you can enable the regulator/charger drivers separately if
 	required.
+
+config PMIC_PALMAS
+	bool "Enable driver for Texas Instruments PALMAS PMIC"
+	depends on DM_PMIC
+	---help---
+	The PALMAS is a PMIC containing several LDOs, SMPS.
+	This driver binds the pmic children.
@@ -16,6 +16,7 @@
 obj-$(CONFIG_PMIC_RN5T567) += rn5t567.o
 obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
 obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
+obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o
  
 obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
 obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o
+/*
+ * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
+ * Keerthy <j-keerthy@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/palmas.h>
+#include <dm/device.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
+	{ .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
+	{ },
+};
+
+static int palmas_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 palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	if (dm_i2c_read(dev, reg, buff, len)) {
+		error("read error from device: %p register: %#x!", dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int palmas_bind(struct udevice *dev)
+{
+	int pmic_node = -1, regulators_node;
+	const void *blob = gd->fdt_blob;
+	int children;
+	int node = dev->of_offset;
+	int subnode, len;
+
+	fdt_for_each_subnode(blob, subnode, node) {
+		const char *name;
+		char *temp;
+
+		name = fdt_get_name(blob, subnode, &len);
+		temp = strstr(name, "pmic");
+		if (temp) {
+			pmic_node = subnode;
+			break;
+		}
+	}
+
+	if (pmic_node <= 0) {
+		debug("%s: %s pmic subnode not found!", __func__, dev->name);
+		return -ENXIO;
+	}
+
+	regulators_node = fdt_subnode_offset(blob, pmic_node, "regulators");
+
+	if (regulators_node <= 0) {
+		debug("%s: %s reg subnode not found!", __func__, dev->name);
+		return -ENXIO;
+	}
+
+	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 palmas_ops = {
+	.read = palmas_read,
+	.write = palmas_write,
+};
+
+static const struct udevice_id palmas_ids[] = {
+	{ .compatible = "ti,tps659038", .data = TPS659038 },
+	{ .compatible = "ti,tps65917" , .data = TPS65917 },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_palmas) = {
+	.name = "palmas_pmic",
+	.id = UCLASS_PMIC,
+	.of_match = palmas_ids,
+	.bind = palmas_bind,
+	.ops = &palmas_ops,
+};
+#define	PALMAS		0x0
+#define TPS659038	0x1
+#define TPS65917	0x2
+
+/* I2C device address for pmic palmas */
+#define PALMAS_I2C_ADDR	(0x12 >> 1)
+#define PALMAS_LDO_NUM		11
+#define PALMAS_SMPS_NUM	8
+
+/* Drivers name */
+#define PALMAS_LDO_DRIVER     "palmas_ldo"
+#define PALMAS_SMPS_DRIVER    "palmas_smps"
+
+#define PALMAS_SMPS_VOLT_MASK		0x7F
+#define PALMAS_SMPS_RANGE_MASK		0x80
+#define PALMAS_SMPS_VOLT_MAX_HEX	0x7F
+#define PALMAS_SMPS_VOLT_MAX		3300000
+#define PALMAS_SMPS_MODE_MASK		0x3
+#define	PALMAS_SMPS_STATUS_MASK		0x30
+
+#define PALMAS_LDO_VOLT_MASK    0x3F
+#define PALMAS_LDO_VOLT_MAX_HEX 0x3F
+#define PALMAS_LDO_VOLT_MAX     3300000
+#define PALMAS_LDO_MODE_MASK	0x1
+#define PALMAS_LDO_STATUS_MASK	0x10
...	...	@@ -143,4 +143,11 @@
143	143	FETs and a battery charger. This driver provides register access
144	144	only, and you can enable the regulator/charger drivers separately if
145	145	required.
	146	+
	147	+config PMIC_PALMAS
	148	+ bool "Enable driver for Texas Instruments PALMAS PMIC"
	149	+ depends on DM_PMIC
	150	+ ---help---
	151	+ The PALMAS is a PMIC containing several LDOs, SMPS.
	152	+ This driver binds the pmic children.
...	...	@@ -16,6 +16,7 @@
16	16	obj-$(CONFIG_PMIC_RN5T567) += rn5t567.o
17	17	obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
18	18	obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
	19	+obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o
19	20
20	21	obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
21	22	obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o
	1	+/*
	2	+ * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
	3	+ * Keerthy <j-keerthy@ti.com>
	4	+ *
	5	+ * SPDX-License-Identifier: GPL-2.0+
	6	+ */
	7	+
	8	+#include <common.h>
	9	+#include <fdtdec.h>
	10	+#include <errno.h>
	11	+#include <dm.h>
	12	+#include <i2c.h>
	13	+#include <power/pmic.h>
	14	+#include <power/regulator.h>
	15	+#include <power/palmas.h>
	16	+#include <dm/device.h>
	17	+
	18	+DECLARE_GLOBAL_DATA_PTR;
	19	+
	20	+static const struct pmic_child_info pmic_children_info[] = {
	21	+ { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
	22	+ { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
	23	+ { },
	24	+};
	25	+
	26	+static int palmas_write(struct udevice dev, uint reg, const uint8_t buff,
	27	+ int len)
	28	+{
	29	+ if (dm_i2c_write(dev, reg, buff, len)) {
	30	+ error("write error to device: %p register: %#x!", dev, reg);
	31	+ return -EIO;
	32	+ }
	33	+
	34	+ return 0;
	35	+}
	36	+
	37	+static int palmas_read(struct udevice dev, uint reg, uint8_t buff, int len)
	38	+{
	39	+ if (dm_i2c_read(dev, reg, buff, len)) {
	40	+ error("read error from device: %p register: %#x!", dev, reg);
	41	+ return -EIO;
	42	+ }
	43	+
	44	+ return 0;
	45	+}
	46	+
	47	+static int palmas_bind(struct udevice *dev)
	48	+{
	49	+ int pmic_node = -1, regulators_node;
	50	+ const void *blob = gd->fdt_blob;
	51	+ int children;
	52	+ int node = dev->of_offset;
	53	+ int subnode, len;
	54	+
	55	+ fdt_for_each_subnode(blob, subnode, node) {
	56	+ const char *name;
	57	+ char *temp;
	58	+
	59	+ name = fdt_get_name(blob, subnode, &len);
	60	+ temp = strstr(name, "pmic");
	61	+ if (temp) {
	62	+ pmic_node = subnode;
	63	+ break;
	64	+ }
	65	+ }
	66	+
	67	+ if (pmic_node <= 0) {
	68	+ debug("%s: %s pmic subnode not found!", __func__, dev->name);
	69	+ return -ENXIO;
	70	+ }
	71	+
	72	+ regulators_node = fdt_subnode_offset(blob, pmic_node, "regulators");
	73	+
	74	+ if (regulators_node <= 0) {
	75	+ debug("%s: %s reg subnode not found!", __func__, dev->name);
	76	+ return -ENXIO;
	77	+ }
	78	+
	79	+ children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	80	+ if (!children)
	81	+ debug("%s: %s - no child found\n", __func__, dev->name);
	82	+
	83	+ /* Always return success for this device */
	84	+ return 0;
	85	+}
	86	+
	87	+static struct dm_pmic_ops palmas_ops = {
	88	+ .read = palmas_read,
	89	+ .write = palmas_write,
	90	+};
	91	+
	92	+static const struct udevice_id palmas_ids[] = {
	93	+ { .compatible = "ti,tps659038", .data = TPS659038 },
	94	+ { .compatible = "ti,tps65917" , .data = TPS65917 },
	95	+ { }
	96	+};
	97	+
	98	+U_BOOT_DRIVER(pmic_palmas) = {
	99	+ .name = "palmas_pmic",
	100	+ .id = UCLASS_PMIC,
	101	+ .of_match = palmas_ids,
	102	+ .bind = palmas_bind,
	103	+ .ops = &palmas_ops,
	104	+};
	1	+#define PALMAS 0x0
	2	+#define TPS659038 0x1
	3	+#define TPS65917 0x2
	4	+
	5	+/* I2C device address for pmic palmas */
	6	+#define PALMAS_I2C_ADDR (0x12 >> 1)
	7	+#define PALMAS_LDO_NUM 11
	8	+#define PALMAS_SMPS_NUM 8
	9	+
	10	+/* Drivers name */
	11	+#define PALMAS_LDO_DRIVER "palmas_ldo"
	12	+#define PALMAS_SMPS_DRIVER "palmas_smps"
	13	+
	14	+#define PALMAS_SMPS_VOLT_MASK 0x7F
	15	+#define PALMAS_SMPS_RANGE_MASK 0x80
	16	+#define PALMAS_SMPS_VOLT_MAX_HEX 0x7F
	17	+#define PALMAS_SMPS_VOLT_MAX 3300000
	18	+#define PALMAS_SMPS_MODE_MASK 0x3
	19	+#define PALMAS_SMPS_STATUS_MASK 0x30
	20	+
	21	+#define PALMAS_LDO_VOLT_MASK 0x3F
	22	+#define PALMAS_LDO_VOLT_MAX_HEX 0x3F
	23	+#define PALMAS_LDO_VOLT_MAX 3300000
	24	+#define PALMAS_LDO_MODE_MASK 0x1
	25	+#define PALMAS_LDO_STATUS_MASK 0x10