Merge remote-tracking branches 'regulator/topic/fan53555', 'regulator/topic/lp3971', 'regulator/topic/lp3972', 'regulator/topic/lp873x' and 'regulator/topic/max77620' into regulator-next

Documentation/devicetree/bindings/regulator/regulator-max77620.txt

@@ -94,6 +94,28 @@ Following are additional properties:
 					This is applicable if suspend state
 					FPS source is selected as FPS0, FPS1 or
 					FPS2.
+- maxim,ramp-rate-setting:		integer, ramp rate(uV/us) setting to be
+					configured to the device.
+					The platform may have different ramp
+					rate than advertised ramp rate if it has
+					design variation from Maxim's
+					recommended. On this case, platform
+					specific ramp rate is used for ramp time
+					calculation and this property is used
+					for device register configurations.
+					The measured ramp rate of platform is
+					provided by the regulator-ramp-delay
+					as described in <devicetree/bindings/
+					regulator/regulator.txt>.
+					Maxim Max77620 supports following ramp
+					delay:
+					  SD: 13.75mV/us, 27.5mV/us, 55mV/us
+					  LDOs: 5mV/us, 100mV/us
+
+Note: If the measured ramp delay is same as advertised ramp delay then it is not
+required to provide the ramp delay with property "maxim,ramp-rate-setting". The
+ramp rate can be provided by the regulator-ramp-delay which will be used for
+ramp time calculation for voltage change as well as for device configuration.
 
 Example:
 --------

drivers/regulator/Kconfig

@@ -321,6 +321,15 @@ config REGULATOR_LP872X
 	help
 	  This driver supports LP8720/LP8725 PMIC
 
+config REGULATOR_LP873X
+	tristate "TI LP873X Power regulators"
+	depends on MFD_LP873X && OF
+	help
+	  This driver supports LP873X voltage regulator chips. LP873X
+	  provides two step-down converters and two general-purpose LDO
+	  voltage regulators. It supports software based voltage control
+	  for different voltage domains
+
 config REGULATOR_LP8755
 	tristate "TI LP8755 High Performance PMU driver"
 	depends on I2C

drivers/regulator/Makefile

@@ -42,6 +42,7 @@ obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o
 obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
 obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
 obj-$(CONFIG_REGULATOR_LP872X) += lp872x.o
+obj-$(CONFIG_REGULATOR_LP873X) += lp873x-regulator.o
 obj-$(CONFIG_REGULATOR_LP8788) += lp8788-buck.o
 obj-$(CONFIG_REGULATOR_LP8788) += lp8788-ldo.o
 obj-$(CONFIG_REGULATOR_LP8755) += lp8755.o

drivers/regulator/fan53555.c

@@ -65,6 +65,13 @@ enum {
 	FAN53555_CHIP_ID_03,
 	FAN53555_CHIP_ID_04,
 	FAN53555_CHIP_ID_05,
+	FAN53555_CHIP_ID_08 = 8,
+};
+
+/* IC mask revision */
+enum {
+	FAN53555_CHIP_REV_00 = 0x3,
+	FAN53555_CHIP_REV_13 = 0xf,
 };
 
 enum {
@@ -217,9 +224,26 @@ static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
 	/* Init voltage range and step */
 	switch (di->chip_id) {
 	case FAN53555_CHIP_ID_00:
+		switch (di->chip_rev) {
+		case FAN53555_CHIP_REV_00:
+			di->vsel_min = 600000;
+			di->vsel_step = 10000;
+			break;
+		case FAN53555_CHIP_REV_13:
+			di->vsel_min = 800000;
+			di->vsel_step = 10000;
+			break;
+		default:
+			dev_err(di->dev,
+				"Chip ID %d with rev %d not supported!\n",
+				di->chip_id, di->chip_rev);
+			return -EINVAL;
+		}
+		break;
 	case FAN53555_CHIP_ID_01:
 	case FAN53555_CHIP_ID_03:
 	case FAN53555_CHIP_ID_05:
+	case FAN53555_CHIP_ID_08:
 		di->vsel_min = 600000;
 		di->vsel_step = 10000;
 		break;

drivers/regulator/lp3971.c

@@ -365,8 +365,8 @@ static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val)
 	mutex_lock(&lp3971->io_lock);
 
 	ret = lp3971_i2c_read(lp3971->i2c, reg, 1, &tmp);
-	tmp = (tmp & ~mask) | val;
 	if (ret == 0) {
+		tmp = (tmp & ~mask) | val;
 		ret = lp3971_i2c_write(lp3971->i2c, reg, 1, &tmp);
 		dev_dbg(lp3971->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
 			(unsigned)val&0xff);

drivers/regulator/lp3972.c

@@ -211,8 +211,8 @@ static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, u16 mask, u16 val)
 	mutex_lock(&lp3972->io_lock);
 
 	ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
-	tmp = (tmp & ~mask) | val;
 	if (ret == 0) {
+		tmp = (tmp & ~mask) | val;
 		ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
 		dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
 			(unsigned)val & 0xff);

drivers/regulator/lp873x-regulator.c

@@ -0,0 +1,241 @@
+/*
+ * Regulator driver for LP873X PMIC
+ *
+ * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp873x.h>
+
+#define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \
+			 _delay, _lr, _nlr, _cr)			\
+	[_id] = {							\
+		.desc = {						\
+			.name			= _name,		\
+			.id			= _id,			\
+			.of_match		= of_match_ptr(_of),	\
+			.regulators_node	= of_match_ptr("regulators"),\
+			.ops			= &_ops,		\
+			.n_voltages		= _n,			\
+			.type			= REGULATOR_VOLTAGE,	\
+			.owner			= THIS_MODULE,		\
+			.vsel_reg		= _vr,			\
+			.vsel_mask		= _vm,			\
+			.enable_reg		= _er,			\
+			.enable_mask		= _em,			\
+			.ramp_delay		= _delay,		\
+			.linear_ranges		= _lr,			\
+			.n_linear_ranges	= _nlr,			\
+		},							\
+		.ctrl2_reg = _cr,					\
+	}
+
+struct lp873x_regulator {
+	struct regulator_desc desc;
+	unsigned int ctrl2_reg;
+};
+
+static const struct lp873x_regulator regulators[];
+
+static const struct regulator_linear_range buck0_buck1_ranges[] = {
+	REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0),
+	REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000),
+	REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
+	REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
+};
+
+static const struct regulator_linear_range ldo0_ldo1_ranges[] = {
+	REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000),
+};
+
+static unsigned int lp873x_buck_ramp_delay[] = {
+	30000, 15000, 10000, 7500, 3800, 1900, 940, 470
+};
+
+/* LP873X BUCK current limit */
+static const unsigned int lp873x_buck_uA[] = {
+	1500000, 2000000, 2500000, 3000000, 3500000, 4000000,
+};
+
+static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev,
+				      int ramp_delay)
+{
+	int id = rdev_get_id(rdev);
+	struct lp873x *lp873 = rdev_get_drvdata(rdev);
+	unsigned int reg;
+	int ret;
+
+	if (ramp_delay <= 470)
+		reg = 7;
+	else if (ramp_delay <= 940)
+		reg = 6;
+	else if (ramp_delay <= 1900)
+		reg = 5;
+	else if (ramp_delay <= 3800)
+		reg = 4;
+	else if (ramp_delay <= 7500)
+		reg = 3;
+	else if (ramp_delay <= 10000)
+		reg = 2;
+	else if (ramp_delay <= 15000)
+		reg = 1;
+	else
+		reg = 0;
+
+	ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg,
+				 LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE,
+				 reg << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE));
+	if (ret) {
+		dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret);
+		return ret;
+	}
+
+	rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg];
+
+	return 0;
+}
+
+static int lp873x_buck_set_current_limit(struct regulator_dev *rdev,
+					 int min_uA, int max_uA)
+{
+	int id = rdev_get_id(rdev);
+	struct lp873x *lp873 = rdev_get_drvdata(rdev);
+	int i;
+
+	for (i = ARRAY_SIZE(lp873x_buck_uA) - 1; i >= 0; i--) {
+		if (lp873x_buck_uA[i] >= min_uA &&
+		    lp873x_buck_uA[i] <= max_uA)
+			return regmap_update_bits(lp873->regmap,
+						  regulators[id].ctrl2_reg,
+						  LP873X_BUCK0_CTRL_2_BUCK0_ILIM,
+						  i << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM));
+	}
+
+	return -EINVAL;
+}
+
+static int lp873x_buck_get_current_limit(struct regulator_dev *rdev)
+{
+	int id = rdev_get_id(rdev);
+	struct lp873x *lp873 = rdev_get_drvdata(rdev);
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(lp873->regmap, regulators[id].ctrl2_reg, &val);
+	if (ret)
+		return ret;
+
+	val = (val & LP873X_BUCK0_CTRL_2_BUCK0_ILIM) >>
+	       __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM);
+
+	return (val < ARRAY_SIZE(lp873x_buck_uA)) ?
+			lp873x_buck_uA[val] : -EINVAL;
+}
+
+/* Operations permitted on BUCK0, BUCK1 */
+static struct regulator_ops lp873x_buck01_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_ramp_delay		= lp873x_buck_set_ramp_delay,
+	.set_current_limit	= lp873x_buck_set_current_limit,
+	.get_current_limit	= lp873x_buck_get_current_limit,
+};
+
+/* Operations permitted on LDO0 and LDO1 */
+static struct regulator_ops lp873x_ldo01_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+};
+
+static const struct lp873x_regulator regulators[] = {
+	LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops,
+			 256, LP873X_REG_BUCK0_VOUT,
+			 LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1,
+			 LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000,
+			 buck0_buck1_ranges, 4, LP873X_REG_BUCK0_CTRL_2),
+	LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops,
+			 256, LP873X_REG_BUCK1_VOUT,
+			 LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1,
+			 LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000,
+			 buck0_buck1_ranges, 4, LP873X_REG_BUCK1_CTRL_2),
+	LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26,
+			 LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET,
+			 LP873X_REG_LDO0_CTRL,
+			 LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 1,
+			 0xFF),
+	LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26,
+			 LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET,
+			 LP873X_REG_LDO1_CTRL,
+			 LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 1,
+			 0xFF),
+};
+
+static int lp873x_regulator_probe(struct platform_device *pdev)
+{
+	struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+	int i;
+
+	platform_set_drvdata(pdev, lp873);
+
+	config.dev = &pdev->dev;
+	config.dev->of_node = lp873->dev->of_node;
+	config.driver_data = lp873;
+	config.regmap = lp873->regmap;
+
+	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+		rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
+					       &config);
+		if (IS_ERR(rdev)) {
+			dev_err(lp873->dev, "failed to register %s regulator\n",
+				pdev->name);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id lp873x_regulator_id_table[] = {
+	{ "lp873x-regulator", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table);
+
+static struct platform_driver lp873x_regulator_driver = {
+	.driver = {
+		.name = "lp873x-pmic",
+	},
+	.probe = lp873x_regulator_probe,
+	.id_table = lp873x_regulator_id_table,
+};
+module_platform_driver(lp873x_regulator_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP873X voltage regulator driver");
+MODULE_ALIAS("platform:lp873x-pmic");
+MODULE_LICENSE("GPL v2");

drivers/regulator/max77620-regulator.c

@@ -81,6 +81,7 @@ struct max77620_regulator_pdata {
 	int suspend_fps_pd_slot;
 	int suspend_fps_pu_slot;
 	int current_mode;
+	int ramp_rate_setting;
 };
 
 struct max77620_regulator {
@@ -307,6 +308,43 @@ static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
 	return 0;
 }
 
+static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id,
+				  int slew_rate)
+{
+	struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+	unsigned int val;
+	int ret;
+	u8 mask;
+
+	if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
+		if (slew_rate <= 13750)
+			val = 0;
+		else if (slew_rate <= 27500)
+			val = 1;
+		else if (slew_rate <= 55000)
+			val = 2;
+		else
+			val = 3;
+		val <<= MAX77620_SD_SR_SHIFT;
+		mask = MAX77620_SD_SR_MASK;
+	} else {
+		if (slew_rate <= 5000)
+			val = 1;
+		else
+			val = 0;
+		mask = MAX77620_LDO_SLEW_RATE_MASK;
+	}
+
+	ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
+	if (ret < 0) {
+		dev_err(pmic->dev, "Regulator %d slew rate set failed: %d\n",
+			id, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
 {
 	struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
@@ -351,6 +389,13 @@ static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
 	if (ret < 0)
 		return ret;
 
+	if (rpdata->ramp_rate_setting) {
+		ret = max77620_set_slew_rate(pmic, id,
+					     rpdata->ramp_rate_setting);
+		if (ret < 0)
+			return ret;
+	}
+
 	return 0;
 }
 
@@ -502,35 +547,16 @@ static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
 {
 	struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
-	struct max77620_regulator_info *rinfo = pmic->rinfo[id];
-	int ret, val;
-	u8 mask;
-
-	if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
-		if (ramp_delay <= 13750)
-			val = 0;
-		else if (ramp_delay <= 27500)
-			val = 1;
-		else if (ramp_delay <= 55000)
-			val = 2;
-		else
-			val = 3;
-		val <<= MAX77620_SD_SR_SHIFT;
-		mask = MAX77620_SD_SR_MASK;
-	} else {
-		if (ramp_delay <= 5000)
-			val = 1;
-		else
-			val = 0;
-		mask = MAX77620_LDO_SLEW_RATE_MASK;
-	}
+	struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
 
-	ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
-	if (ret < 0)
-		dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
-			rinfo->cfg_addr, ret);
+	/* Device specific ramp rate setting tells that platform has
+	 * different ramp rate from advertised value. In this case,
+	 * do not configure anything and just return success.
+	 */
+	if (rpdata->ramp_rate_setting)
+		return 0;
 
-	return ret;
+	return max77620_set_slew_rate(pmic, id, ramp_delay);
 }
 
 static int max77620_of_parse_cb(struct device_node *np,
@@ -563,6 +589,9 @@ static int max77620_of_parse_cb(struct device_node *np,
 			np, "maxim,suspend-fps-power-down-slot", &pval);
 	rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
 
+	ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval);
+	rpdata->ramp_rate_setting = (!ret) ? pval : 0;
+
 	return max77620_init_pmic(pmic, desc->id);
 }