[U-Boot] [PATCH 0/5] power: pmic: Add support for Palmas family of PMICs

[U-Boot] [PATCH 0/5] power: pmic: Add support for Palmas family of PMICs

[Keerthy]

The series adds support for Palmas family of PMICs.
Implements functions to configure regulators. Enable/Disable
Get/Set voltages of regulators.

Supports TPS659038, TPS65917, Palmas.

Tested on TPS659038, TPS65917 using DRA7XX-EVM and AM57XX-EVM. 

Keerthy (5):
  power: regulator: Add ctrl_reg and volt_reg fields for pmic
  power: pmic: Palmas: Add the base pmic support
  power: regulator: palmas: Add regulator support
  configs: am57xx_evm_defconfig: Enable PALMAS options
  configs: dra7xx_evm_defconfig: Enable PALMAS options

 configs/am57xx_evm_defconfig               |   3 +
 configs/dra7xx_evm_defconfig               |   3 +
 drivers/power/pmic/Kconfig                 |   7 +
 drivers/power/pmic/Makefile                |   1 +
 drivers/power/pmic/palmas.c                |  77 +++++
 drivers/power/regulator/Kconfig            |   8 +
 drivers/power/regulator/Makefile           |   1 +
 drivers/power/regulator/palmas_regulator.c | 460 +++++++++++++++++++++++++++++
 include/power/palmas.h                     |  25 ++
 include/power/regulator.h                  |   2 +
 10 files changed, 587 insertions(+)
 create mode 100644 drivers/power/pmic/palmas.c
 create mode 100644 drivers/power/regulator/palmas_regulator.c
 create mode 100644 include/power/palmas.h

-- 
1.9.1

[U-Boot] [PATCH 1/5] power: regulator: Add ctrl_reg and volt_reg fields for pmic

[Keerthy]

The ctrl reg contains bit fields to enable and disable regulators,
and volt_reg has the bit fields to configure the voltage values.
The registers are frequently accessed hence make them part
of dm_regulator_uclass_platdata structure.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 include/power/regulator.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/power/regulator.h b/include/power/regulator.h
index 9bcd728..57b14a3 100644
--- a/include/power/regulator.h
+++ b/include/power/regulator.h
@@ -171,6 +171,8 @@ struct dm_regulator_uclass_platdata {
 	bool boot_on;
 	const char *name;
 	int flags;
+	u8 ctrl_reg;
+	u8 volt_reg;
 };
 
 /* Regulator device operations */
-- 
1.9.1

[U-Boot] [PATCH 2/5] power: pmic: Palmas: Add the base pmic support

[Keerthy]

Add support to bind the regulators/child nodes with the pmic.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/power/pmic/Kconfig  |  7 +++++
 drivers/power/pmic/Makefile |  1 +
 drivers/power/pmic/palmas.c | 77 +++++++++++++++++++++++++++++++++++++++++++++
 include/power/palmas.h      | 25 +++++++++++++++
 4 files changed, 110 insertions(+)
 create mode 100644 drivers/power/pmic/palmas.c
 create mode 100644 include/power/palmas.h

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 69f8d51..92931c5 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -135,3 +135,10 @@ config PMIC_TPS65090
 	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.
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 52b4f71..828c0cf 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_PMIC_PM8916) += pm8916.o
 obj-$(CONFIG_PMIC_RK808) += rk808.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
diff --git a/drivers/power/pmic/palmas.c b/drivers/power/pmic/palmas.c
new file mode 100644
index 0000000..3cef2c9
--- /dev/null
+++ b/drivers/power/pmic/palmas.c
@@ -0,0 +1,77 @@
+/*
+ * (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_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) {
+		printf("%s: %s pmic subnode not found!", __func__, dev->name);
+		return -ENXIO;
+	}
+
+	regulators_node = fdt_subnode_offset(blob, pmic_node, "regulators");
+
+	if (regulators_node <= 0) {
+		printf("%s: %s reg subnode not found!", __func__, dev->name);
+		return -ENXIO;
+	}
+
+	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+	if (!children)
+		printf("%s: %s - no child found\n", __func__, dev->name);
+
+	/* Always return success for this device */
+	return 0;
+}
+
+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,
+};
diff --git a/include/power/palmas.h b/include/power/palmas.h
new file mode 100644
index 0000000..bad5a35
--- /dev/null
+++ b/include/power/palmas.h
@@ -0,0 +1,25 @@
+#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
-- 
1.9.1

[U-Boot] [PATCH 3/5] power: regulator: palmas: Add regulator support

[Keerthy]

The driver provides regulator set/get voltage
enable/disable functions for palmas family of PMICs.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 drivers/power/regulator/Kconfig            |   8 +
 drivers/power/regulator/Makefile           |   1 +
 drivers/power/regulator/palmas_regulator.c | 460 +++++++++++++++++++++++++++++
 3 files changed, 469 insertions(+)
 create mode 100644 drivers/power/regulator/palmas_regulator.c

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 17f22dd..adb710a 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -115,3 +115,11 @@ config REGULATOR_TPS65090
 	regulators, one for each FET. The standard regulator interface is
 	supported, but it is only possible to turn the regulators on or off.
 	There is no voltage/current control.
+
+config DM_REGULATOR_PALMAS
+	bool "Enable driver for PALMAS PMIC regulators"
+       depends on PMIC_PALMAS
+	---help---
+	This enables implementation of driver-model regulator uclass
+	features for REGULATOR PALMAS and the family of PALMAS PMICs.
+	The driver implements get/set api for: value and enable.
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index 1590d85..75080d4 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808.o
 obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
 obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o
 obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o
diff --git a/drivers/power/regulator/palmas_regulator.c b/drivers/power/regulator/palmas_regulator.c
new file mode 100644
index 0000000..6a506fd
--- /dev/null
+++ b/drivers/power/regulator/palmas_regulator.c
@@ -0,0 +1,460 @@
+/*
+ * (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>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define	REGULATOR_ON		0x1
+#define	REGULATOR_OFF		0x0
+
+#define	SMPS_MODE_MASK		0x3
+#define	SMPS_MODE_SHIFT		0x0
+#define	LDO_MODE_MASK		0x1
+#define	LDO_MODE_SHIFT		0x0
+
+static const char palmas_smps_ctrl[][PALMAS_SMPS_NUM] = {
+	{0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 0x3c},
+	{0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38},
+	{0x20, 0x24, 0x2c, 0x30, 0x38},
+};
+
+static const char palmas_smps_volt[][PALMAS_SMPS_NUM] = {
+	{0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b, 0x3c},
+	{0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b},
+	{0x23, 0x27, 0x2f, 0x33, 0x3B}
+};
+
+static const char palmas_ldo_ctrl[][PALMAS_LDO_NUM] = {
+	{0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
+	{0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
+	{0x50, 0x52, 0x54, 0x5e, 0x62}
+};
+
+static const char palmas_ldo_volt[][PALMAS_LDO_NUM] = {
+	{0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
+	{0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
+	{0x51, 0x53, 0x55, 0x5f, 0x63}
+};
+
+static int palmas_smps_enable(struct udevice *dev, int op, bool *enable)
+{
+	int ret;
+	uint8_t val;
+	unsigned int adr;
+	struct dm_regulator_uclass_platdata *uc_pdata;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+	adr = uc_pdata->ctrl_reg;
+
+	ret = dm_i2c_read(dev->parent, adr, &val, 1);
+		if (ret)
+			return ret;
+
+	if (op == PMIC_OP_GET) {
+		val &= PALMAS_SMPS_STATUS_MASK;
+
+		if (val)
+			*enable = true;
+		else
+			*enable = false;
+
+		return 0;
+	} else if (op == PMIC_OP_SET) {
+		if (*enable)
+			val |= PALMAS_SMPS_MODE_MASK;
+		else
+			val &= ~(PALMAS_SMPS_MODE_MASK);
+
+		dm_i2c_write(dev->parent, adr, &val, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int palmas_smps_volt2hex(int uV)
+{
+	if (uV > PALMAS_LDO_VOLT_MAX)
+		return -EINVAL;
+
+	if (uV > 1650000)
+		return (uV - 1000000) / 20000 + 0x6;
+
+	if (uV == 500000)
+		return 0x6;
+	else
+		return 0x6 + ((uV - 500000) / 10000);
+}
+
+static int palmas_smps_hex2volt(int hex, bool range)
+{
+	unsigned int uV = 0;
+
+	if (hex > PALMAS_SMPS_VOLT_MAX_HEX)
+		return -EINVAL;
+
+	if (hex < 0x7)
+		uV = 500000;
+	else
+		uV = 500000 + (hex - 0x6) * 10000;
+
+	if (range)
+		uV *= 2;
+
+	return uV;
+}
+
+static int palmas_smps_val(struct udevice *dev, int op, int *uV)
+{
+	unsigned int hex, adr;
+	unsigned char val;
+	int ret;
+	bool range;
+	struct dm_regulator_uclass_platdata *uc_pdata;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+
+	if (op == PMIC_OP_GET)
+		*uV = 0;
+
+	adr = uc_pdata->volt_reg;
+
+	ret = dm_i2c_read(dev->parent, adr, &val, 1);
+	if (ret)
+		return ret;
+
+	if (op == PMIC_OP_GET) {
+		if (val & PALMAS_SMPS_RANGE_MASK)
+			range =  true;
+		else
+			range = false;
+
+		val &= PALMAS_SMPS_VOLT_MASK;
+		ret = palmas_smps_hex2volt(val, range);
+		if (ret < 0)
+			return ret;
+		*uV = ret;
+
+		return 0;
+	}
+
+	hex = palmas_smps_volt2hex(*uV);
+	if (hex < 0)
+		return hex;
+
+	val &= ~PALMAS_SMPS_VOLT_MASK;
+	val |= hex;
+	if (*uV > 1650000)
+		val |= PALMAS_SMPS_RANGE_MASK;
+	ret = dm_i2c_write(dev->parent, adr, &val, 1);
+
+	return ret;
+}
+
+static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable)
+{
+	int ret;
+	uint8_t val;
+	unsigned int adr;
+	struct dm_regulator_uclass_platdata *uc_pdata;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+	adr = uc_pdata->ctrl_reg;
+
+	ret = dm_i2c_read(dev->parent, adr, &val, 1);
+		if (ret)
+			return ret;
+
+	if (op == PMIC_OP_GET) {
+		val &= PALMAS_LDO_STATUS_MASK;
+
+		if (val)
+			*enable = true;
+		else
+			*enable = false;
+
+		return 0;
+	} else if (op == PMIC_OP_SET) {
+		if (*enable)
+			val |= PALMAS_LDO_MODE_MASK;
+		else
+			val &= ~(PALMAS_LDO_MODE_MASK);
+
+		dm_i2c_write(dev->parent, adr, &val, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int palmas_ldo_volt2hex(int uV)
+{
+	if (uV > PALMAS_LDO_VOLT_MAX)
+		return -EINVAL;
+
+	return (uV - 850000) / 50000;
+}
+
+static int palmas_ldo_hex2volt(int hex)
+{
+	if (hex > PALMAS_LDO_VOLT_MAX_HEX)
+		return -EINVAL;
+
+	if (!hex)
+		return 0;
+
+	return (hex * 50000) + 850000;
+}
+
+static int palmas_ldo_val(struct udevice *dev, int op, int *uV)
+{
+	unsigned int hex, adr;
+	unsigned char val;
+	int ret;
+
+	struct dm_regulator_uclass_platdata *uc_pdata;
+
+	if (op == PMIC_OP_GET)
+		*uV = 0;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+
+	adr = uc_pdata->volt_reg;
+
+	ret = dm_i2c_read(dev->parent, adr, &val, 1);
+	if (ret)
+		return ret;
+
+	if (op == PMIC_OP_GET) {
+		val &= PALMAS_LDO_VOLT_MASK;
+		ret = palmas_ldo_hex2volt(val);
+		if (ret < 0)
+			return ret;
+		*uV = ret;
+		return 0;
+	}
+
+	hex = palmas_ldo_volt2hex(*uV);
+	if (hex < 0)
+		return hex;
+
+	val &= ~PALMAS_LDO_VOLT_MASK;
+	val |= hex;
+	if (*uV > 1650000)
+		val |= 0x80;
+	ret = dm_i2c_write(dev->parent, adr, &val, 1);
+
+	return ret;
+}
+
+static int palmas_ldo_probe(struct udevice *dev)
+{
+	struct dm_regulator_uclass_platdata *uc_pdata;
+	struct udevice *parent;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+
+	parent = dev_get_parent(dev);
+	int type = dev_get_driver_data(parent);
+
+	uc_pdata->type = REGULATOR_TYPE_LDO;
+
+	if (dev->driver_data) {
+		u8 idx = dev->driver_data - 1;
+		uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][idx];
+		uc_pdata->volt_reg = palmas_ldo_volt[type][idx];
+	} else {
+		/* check for ldoln and ldousb cases */
+		if (!strcmp("ldoln", dev->name)) {
+			uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][9];
+			uc_pdata->volt_reg = palmas_ldo_volt[type][9];
+		} else if (!strcmp("ldousb", dev->name)) {
+			uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][10];
+			uc_pdata->volt_reg = palmas_ldo_volt[type][10];
+		}
+	}
+
+	return 0;
+}
+
+static int ldo_get_value(struct udevice *dev)
+{
+	int uV;
+	int ret;
+
+	ret = palmas_ldo_val(dev, PMIC_OP_GET, &uV);
+	if (ret)
+		return ret;
+
+	return uV;
+}
+
+static int ldo_set_value(struct udevice *dev, int uV)
+{
+	return palmas_ldo_val(dev, PMIC_OP_SET, &uV);
+}
+
+static bool ldo_get_enable(struct udevice *dev)
+{
+	bool enable = false;
+	int ret;
+
+	ret = palmas_ldo_enable(dev, PMIC_OP_GET, &enable);
+	if (ret)
+		return ret;
+
+	return enable;
+}
+
+static int ldo_set_enable(struct udevice *dev, bool enable)
+{
+	return palmas_ldo_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static int palmas_smps_probe(struct udevice *dev)
+{
+	struct dm_regulator_uclass_platdata *uc_pdata;
+	struct udevice *parent;
+	int idx;
+
+	uc_pdata = dev_get_uclass_platdata(dev);
+
+	parent = dev_get_parent(dev);
+	int type = dev_get_driver_data(parent);
+
+	uc_pdata->type = REGULATOR_TYPE_BUCK;
+
+	switch (type) {
+	case PALMAS:
+	case TPS659038:
+		switch (dev->driver_data) {
+		case 123:
+		case 12:
+			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][0];
+			uc_pdata->volt_reg = palmas_smps_volt[type][0];
+			break;
+		case 3:
+			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][1];
+			uc_pdata->volt_reg = palmas_smps_volt[type][1];
+			break;
+		case 45:
+			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][2];
+			uc_pdata->volt_reg = palmas_smps_volt[type][2];
+			break;
+		case 6:
+		case 7:
+		case 8:
+		case 9:
+		case 10:
+			idx = dev->driver_data - 4;
+			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
+			uc_pdata->volt_reg = palmas_smps_volt[type][idx];
+			break;
+
+		default:
+			printf("Wrong ID for regulator\n");
+		}
+		break;
+
+	case TPS65917:
+		switch (dev->driver_data) {
+		case 1:
+		case 2:
+		case 3:
+		case 4:
+		case 5:
+			idx = dev->driver_data - 1;
+			uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
+			uc_pdata->volt_reg = palmas_smps_volt[type][idx];
+			break;
+
+		default:
+			printf("Wrong ID for regulator\n");
+		}
+		break;
+
+	default:
+			printf("Invalid PMIC ID\n");
+	}
+
+	return 0;
+}
+
+static int smps_get_value(struct udevice *dev)
+{
+	int uV;
+	int ret;
+
+	ret = palmas_smps_val(dev, PMIC_OP_GET, &uV);
+	if (ret)
+		return ret;
+
+	return uV;
+}
+
+static int smps_set_value(struct udevice *dev, int uV)
+{
+	return palmas_smps_val(dev, PMIC_OP_SET, &uV);
+}
+
+static bool smps_get_enable(struct udevice *dev)
+{
+	bool enable = false;
+	int ret;
+
+
+	ret = palmas_smps_enable(dev, PMIC_OP_GET, &enable);
+	if (ret)
+		return ret;
+
+	return enable;
+}
+
+static int smps_set_enable(struct udevice *dev, bool enable)
+{
+	return palmas_smps_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static const struct dm_regulator_ops palmas_ldo_ops = {
+	.get_value  = ldo_get_value,
+	.set_value  = ldo_set_value,
+	.get_enable = ldo_get_enable,
+	.set_enable = ldo_set_enable,
+};
+
+U_BOOT_DRIVER(palmas_ldo) = {
+	.name = PALMAS_LDO_DRIVER,
+	.id = UCLASS_REGULATOR,
+	.ops = &palmas_ldo_ops,
+	.probe = palmas_ldo_probe,
+};
+
+static const struct dm_regulator_ops palmas_smps_ops = {
+	.get_value  = smps_get_value,
+	.set_value  = smps_set_value,
+	.get_enable = smps_get_enable,
+	.set_enable = smps_set_enable,
+};
+
+U_BOOT_DRIVER(palmas_smps) = {
+	.name = PALMAS_SMPS_DRIVER,
+	.id = UCLASS_REGULATOR,
+	.ops = &palmas_smps_ops,
+	.probe = palmas_smps_probe,
+};
-- 
1.9.1

[U-Boot] [PATCH 4/5] configs: am57xx_evm_defconfig: Enable PALMAS options

[Keerthy]

Enable palmas PMIC config options.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 configs/am57xx_evm_defconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configs/am57xx_evm_defconfig b/configs/am57xx_evm_defconfig
index d49129d..b277783 100644
--- a/configs/am57xx_evm_defconfig
+++ b/configs/am57xx_evm_defconfig
@@ -39,6 +39,9 @@ CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_DM_PMIC=y
+CONFIG_PMIC_PALMAS=y
+CONFIG_DM_REGULATOR_PALMAS=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
 CONFIG_DM_SPI=y
-- 
1.9.1

[U-Boot] [PATCH 5/5] configs: dra7xx_evm_defconfig: Enable PALMAS options

[Keerthy]

Enable palmas PMIC config options.

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
 configs/dra7xx_evm_defconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configs/dra7xx_evm_defconfig b/configs/dra7xx_evm_defconfig
index 64184de..882e615 100644
--- a/configs/dra7xx_evm_defconfig
+++ b/configs/dra7xx_evm_defconfig
@@ -43,8 +43,11 @@ CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_DM_ETH=y
+CONFIG_DM_PMIC=y
+CONFIG_PMIC_PALMAS=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_PALMAS=y
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
 CONFIG_DM_SPI=y
-- 
1.9.1

[U-Boot] [PATCH 1/5] power: regulator: Add ctrl_reg and volt_reg fields for pmic

[Przemyslaw Marczak]

Hello Keerthy,

On 09/14/2016 06:28 AM, Keerthy wrote:
> The ctrl reg contains bit fields to enable and disable regulators,
> and volt_reg has the bit fields to configure the voltage values.
> The registers are frequently accessed hence make them part
> of dm_regulator_uclass_platdata structure.
>
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>   include/power/regulator.h | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/include/power/regulator.h b/include/power/regulator.h
> index 9bcd728..57b14a3 100644
> --- a/include/power/regulator.h
> +++ b/include/power/regulator.h
> @@ -171,6 +171,8 @@ struct dm_regulator_uclass_platdata {
>   	bool boot_on;
>   	const char *name;
>   	int flags;
> +	u8 ctrl_reg;
> +	u8 volt_reg;
>   };
>   
>   /* Regulator device operations */

This structure above is used for some common "high-level" data, which 
can be used by regulator uclass driver.

Even if most of PMICs has some ctrl/volt/etc regs, the regulator uclass 
driver doesn't know, how to use it, so from this point of view it is 
useless.

But, you can keep device/driver data in a proper fields. Please look at 
those files:

drivers/power/regulator/fixed.c:119
drivers/power/regulator/pfuze100.c:567

To store some device internal data, you can use:
.platdata_auto_alloc_size -> with access by dev_get_platdata()
.priv_auto_alloc_size -> with access by dev_get_priv()

Best regards,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com

[U-Boot] [PATCH 1/5] power: regulator: Add ctrl_reg and volt_reg fields for pmic

[Keerthy]

Hi Marczak,

On Wednesday 14 September 2016 01:33 PM, Przemyslaw Marczak wrote:
> Hello Keerthy,
>
> On 09/14/2016 06:28 AM, Keerthy wrote:
>> The ctrl reg contains bit fields to enable and disable regulators,
>> and volt_reg has the bit fields to configure the voltage values.
>> The registers are frequently accessed hence make them part
>> of dm_regulator_uclass_platdata structure.
>>
>> Signed-off-by: Keerthy <j-keerthy@ti.com>
>> ---
>>   include/power/regulator.h | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/include/power/regulator.h b/include/power/regulator.h
>> index 9bcd728..57b14a3 100644
>> --- a/include/power/regulator.h
>> +++ b/include/power/regulator.h
>> @@ -171,6 +171,8 @@ struct dm_regulator_uclass_platdata {
>>       bool boot_on;
>>       const char *name;
>>       int flags;
>> +    u8 ctrl_reg;
>> +    u8 volt_reg;
>>   };
>>     /* Regulator device operations */
>
> This structure above is used for some common "high-level" data, which
> can be used by regulator uclass driver.
>
> Even if most of PMICs has some ctrl/volt/etc regs, the regulator uclass
> driver doesn't know, how to use it, so from this point of view it is
> useless.
>
> But, you can keep device/driver data in a proper fields. Please look at
> those files:
>
> drivers/power/regulator/fixed.c:119
> drivers/power/regulator/pfuze100.c:567
>
> To store some device internal data, you can use:
> .platdata_auto_alloc_size -> with access by dev_get_platdata()
> .priv_auto_alloc_size -> with access by dev_get_priv()

Thanks for a quick review. I did look at some of those options before 
introducing volt and ctrl here.

Many PMICs will have ctrl/volt registers we might end up having lot of 
private strutures with the same ctrl/volt fields. I agree uclass driver 
will not know how to use it.

If i have to draw parallels from the kernel world regulator_desc is a 
common structure which hosts vsel_reg/enable_reg fields.

Isn't it better to have a common structure instead of having a some 
platform specific structure that might have the same fields?

Let me know your thoughts on this.

>
> Best regards,

[U-Boot] [PATCH 1/5] power: regulator: Add ctrl_reg and volt_reg fields for pmic

[Przemyslaw Marczak]

Hello Keerthy,

On 09/14/2016 10:24 AM, Keerthy wrote:
> Hi Marczak,
>
> On Wednesday 14 September 2016 01:33 PM, Przemyslaw Marczak wrote:
>> Hello Keerthy,
>>
>> On 09/14/2016 06:28 AM, Keerthy wrote:
>>> The ctrl reg contains bit fields to enable and disable regulators,
>>> and volt_reg has the bit fields to configure the voltage values.
>>> The registers are frequently accessed hence make them part
>>> of dm_regulator_uclass_platdata structure.
>>>
>>> Signed-off-by: Keerthy <j-keerthy@ti.com>
>>> ---
>>>   include/power/regulator.h | 2 ++
>>>   1 file changed, 2 insertions(+)
>>>
>>> diff --git a/include/power/regulator.h b/include/power/regulator.h
>>> index 9bcd728..57b14a3 100644
>>> --- a/include/power/regulator.h
>>> +++ b/include/power/regulator.h
>>> @@ -171,6 +171,8 @@ struct dm_regulator_uclass_platdata {
>>>       bool boot_on;
>>>       const char *name;
>>>       int flags;
>>> +    u8 ctrl_reg;
>>> +    u8 volt_reg;
>>>   };
>>>     /* Regulator device operations */
>>
>> This structure above is used for some common "high-level" data, which
>> can be used by regulator uclass driver.
>>
>> Even if most of PMICs has some ctrl/volt/etc regs, the regulator uclass
>> driver doesn't know, how to use it, so from this point of view it is
>> useless.
>>
>> But, you can keep device/driver data in a proper fields. Please look at
>> those files:
>>
>> drivers/power/regulator/fixed.c:119
>> drivers/power/regulator/pfuze100.c:567
>>
>> To store some device internal data, you can use:
>> .platdata_auto_alloc_size -> with access by dev_get_platdata()
>> .priv_auto_alloc_size -> with access by dev_get_priv()
>
> Thanks for a quick review. I did look at some of those options before 
> introducing volt and ctrl here.
>
> Many PMICs will have ctrl/volt registers we might end up having lot of 
> private strutures with the same ctrl/volt fields. I agree uclass 
> driver will not know how to use it.
>
> If i have to draw parallels from the kernel world regulator_desc is a 
> common structure which hosts vsel_reg/enable_reg fields.
>
> Isn't it better to have a common structure instead of having a some 
> platform specific structure that might have the same fields?
>
> Let me know your thoughts on this.
>
>>
>> Best regards,
>
>
>

You are right and I agree with you that make things common is a good 
approach.

At the begin of introducing this framework, I just wanted to provide a 
simple user interface for regulators, so I didn't tried to put all 
common things into a single structure, because not always it could be 
useful.

The present structure layout seems to be a good representation of 
regulator's node in the device-tree.

In the other hand, each driver can provide a static arrays with proper 
data like reg/mask/etc,
the driver:
drivers/power/regulator/s5m8767.c- is a good example.

I'm not going to break your solution, but let's wait for Simon's opinion.

Best regards,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com

[U-Boot] [PATCH 1/5] power: regulator: Add ctrl_reg and volt_reg fields for pmic

[Keerthy]

On Wednesday 14 September 2016 05:26 PM, Przemyslaw Marczak wrote:
> Hello Keerthy,
>
> On 09/14/2016 10:24 AM, Keerthy wrote:
>> Hi Marczak,
>>
>> On Wednesday 14 September 2016 01:33 PM, Przemyslaw Marczak wrote:
>>> Hello Keerthy,
>>>
>>> On 09/14/2016 06:28 AM, Keerthy wrote:
>>>> The ctrl reg contains bit fields to enable and disable regulators,
>>>> and volt_reg has the bit fields to configure the voltage values.
>>>> The registers are frequently accessed hence make them part
>>>> of dm_regulator_uclass_platdata structure.
>>>>
>>>> Signed-off-by: Keerthy <j-keerthy@ti.com>
>>>> ---
>>>>   include/power/regulator.h | 2 ++
>>>>   1 file changed, 2 insertions(+)
>>>>
>>>> diff --git a/include/power/regulator.h b/include/power/regulator.h
>>>> index 9bcd728..57b14a3 100644
>>>> --- a/include/power/regulator.h
>>>> +++ b/include/power/regulator.h
>>>> @@ -171,6 +171,8 @@ struct dm_regulator_uclass_platdata {
>>>>       bool boot_on;
>>>>       const char *name;
>>>>       int flags;
>>>> +    u8 ctrl_reg;
>>>> +    u8 volt_reg;
>>>>   };
>>>>     /* Regulator device operations */
>>>
>>> This structure above is used for some common "high-level" data, which
>>> can be used by regulator uclass driver.
>>>
>>> Even if most of PMICs has some ctrl/volt/etc regs, the regulator uclass
>>> driver doesn't know, how to use it, so from this point of view it is
>>> useless.
>>>
>>> But, you can keep device/driver data in a proper fields. Please look at
>>> those files:
>>>
>>> drivers/power/regulator/fixed.c:119
>>> drivers/power/regulator/pfuze100.c:567
>>>
>>> To store some device internal data, you can use:
>>> .platdata_auto_alloc_size -> with access by dev_get_platdata()
>>> .priv_auto_alloc_size -> with access by dev_get_priv()
>>
>> Thanks for a quick review. I did look at some of those options before
>> introducing volt and ctrl here.
>>
>> Many PMICs will have ctrl/volt registers we might end up having lot of
>> private strutures with the same ctrl/volt fields. I agree uclass
>> driver will not know how to use it.
>>
>> If i have to draw parallels from the kernel world regulator_desc is a
>> common structure which hosts vsel_reg/enable_reg fields.
>>
>> Isn't it better to have a common structure instead of having a some
>> platform specific structure that might have the same fields?
>>
>> Let me know your thoughts on this.
>>
>>>
>>> Best regards,
>>
>>
>>
>
> You are right and I agree with you that make things common is a good
> approach.
>
> At the begin of introducing this framework, I just wanted to provide a
> simple user interface for regulators, so I didn't tried to put all
> common things into a single structure, because not always it could be
> useful.
>
> The present structure layout seems to be a good representation of
> regulator's node in the device-tree.
>
> In the other hand, each driver can provide a static arrays with proper
> data like reg/mask/etc,
> the driver:
> drivers/power/regulator/s5m8767.c- is a good example.
>
> I'm not going to break your solution, but let's wait for Simon's opinion.

okay.

>
> Best regards,

[U-Boot] [PATCH 2/5] power: pmic: Palmas: Add the base pmic support

[Simon Glass]

On 13 September 2016 at 22:28, Keerthy <j-keerthy@ti.com> wrote:
> Add support to bind the regulators/child nodes with the pmic.
>
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>  drivers/power/pmic/Kconfig  |  7 +++++
>  drivers/power/pmic/Makefile |  1 +
>  drivers/power/pmic/palmas.c | 77 +++++++++++++++++++++++++++++++++++++++++++++
>  include/power/palmas.h      | 25 +++++++++++++++
>  4 files changed, 110 insertions(+)
>  create mode 100644 drivers/power/pmic/palmas.c
>  create mode 100644 include/power/palmas.h

Reviewed-by: Simon Glass <sjg@chromium.org>

[U-Boot] [PATCH 3/5] power: regulator: palmas: Add regulator support

[Simon Glass]

On 13 September 2016 at 22:28, Keerthy <j-keerthy@ti.com> wrote:
> The driver provides regulator set/get voltage
> enable/disable functions for palmas family of PMICs.
>
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>  drivers/power/regulator/Kconfig            |   8 +
>  drivers/power/regulator/Makefile           |   1 +
>  drivers/power/regulator/palmas_regulator.c | 460 +++++++++++++++++++++++++++++
>  3 files changed, 469 insertions(+)
>  create mode 100644 drivers/power/regulator/palmas_regulator.c

Reviewed-by: Simon Glass <sjg@chromium.org>

But please consider using dm_i2c_reg_read()

Also you have two blank lines at one point.

[U-Boot] [PATCH 3/5] power: regulator: palmas: Add regulator support

[Keerthy]

On Monday 19 September 2016 06:28 AM, Simon Glass wrote:
> On 13 September 2016 at 22:28, Keerthy <j-keerthy@ti.com> wrote:
>> The driver provides regulator set/get voltage
>> enable/disable functions for palmas family of PMICs.
>>
>> Signed-off-by: Keerthy <j-keerthy@ti.com>
>> ---
>>  drivers/power/regulator/Kconfig            |   8 +
>>  drivers/power/regulator/Makefile           |   1 +
>>  drivers/power/regulator/palmas_regulator.c | 460 +++++++++++++++++++++++++++++
>>  3 files changed, 469 insertions(+)
>>  create mode 100644 drivers/power/regulator/palmas_regulator.c
>
> Reviewed-by: Simon Glass <sjg@chromium.org>
>
> But please consider using dm_i2c_reg_read()
>
> Also you have two blank lines at one point.

Sure i will fix them and repost.
Thanks for the review.

>