Message-ID: <1386053006-6480-4-git-send-email-j-keerthy@ti.com>
Date:	Tue, 3 Dec 2013 12:13:24 +0530
From:	Keerthy <j-keerthy@...com>
To:	<rob.herring@...xeda.com>, <pawel.moll@....com>,
	<mark.rutland@....com>, <swarren@...dotorg.org>,
	<ijc+devicetree@...lion.org.uk>, <rob@...dley.net>,
	<sameo@...ux.intel.com>, <lee.jones@...aro.org>,
	<grant.likely@...aro.org>, <lgirdwood@...il.com>,
	<broonie@...nel.org>
CC:	<j-keerthy@...com>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
Subject: [PATCH 3/4] Regulators: TPS65218: Add Regulator driver for TPS65218 PMIC

This patch adds support for TPS65218 PMIC regulators.

The regulators set consists of 6 DCDCs and 1 LDO. The output
voltages are configurable and are meant to supply power to the
main processor and other components.

Signed-off-by: Keerthy <j-keerthy@...com>
---
 drivers/regulator/Kconfig              |    9 +
 drivers/regulator/Makefile             |    1 +
 drivers/regulator/tps65218-regulator.c |  393 ++++++++++++++++++++++++++++++++
 3 files changed, 403 insertions(+)
 create mode 100644 drivers/regulator/tps65218-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index ce785f4..42f94eb 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -498,6 +498,15 @@ config REGULATOR_TPS65217
 	  voltage regulators. It supports software based voltage control
 	  for different voltage domains
 
+config REGULATOR_TPS65218
+	tristate "TI TPS65218 Power regulators"
+	depends on MFD_TPS65218
+	help
+	  This driver supports TPS65218 voltage regulator chips. TPS65218
+	  provides six step-down converters and one general-purpose LDO
+	  voltage regulators. It supports software based voltage control
+	  for different voltage domains
+
 config REGULATOR_TPS6524X
 	tristate "TI TPS6524X Power regulators"
 	depends on SPI
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 01c597e..dfbfdf9 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65090) += tps65090-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65217) += tps65217-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65218) += tps65218-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
diff --git a/drivers/regulator/tps65218-regulator.c b/drivers/regulator/tps65218-regulator.c
new file mode 100644
index 0000000..4989c83
--- /dev/null
+++ b/drivers/regulator/tps65218-regulator.c
@@ -0,0 +1,393 @@
+/*
+ * tps65218-regulator.c
+ *
+ * Regulator driver for TPS65218 PMIC
+ *
+ * Copyright (C) 2013 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/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/tps65218.h>
+
+static unsigned int tps65218_ramp_delay = 4000;
+
+#define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t) \
+	{						\
+		.name		= _name,		\
+		.id		= _id,			\
+		.ops		= &_ops,		\
+		.n_voltages	= _n,			\
+		.type		= REGULATOR_VOLTAGE,	\
+		.owner		= THIS_MODULE,		\
+		.vsel_reg	= _vr,			\
+		.vsel_mask	= _vm,			\
+		.enable_reg	= _er,	\
+		.enable_mask	= _em,			\
+		.volt_table	= _t,			\
+	}						\
+
+#define TPS65218_INFO(_id, _nm, _min, _max, _f1, _f2)	\
+	{						\
+		.id		= _id,			\
+		.name		= _nm,			\
+		.min_uV		= _min,			\
+		.max_uV		= _max,			\
+		.vsel_to_uv	= _f1,			\
+		.uv_to_vsel	= _f2,			\
+	}
+
+static int tps65218_ldo1_dcdc3_vsel_to_uv(unsigned int vsel)
+{
+	int uV = 0;
+
+	if (vsel <= 26)
+		uV = vsel * 25000 + 900000;
+	else
+		uV = (vsel - 26) * 50000 + 1550000;
+
+	return uV;
+}
+
+static int tps65218_ldo1_dcdc3_uv_to_vsel(int uV, unsigned int *vsel)
+{
+	if (uV <= 1550000)
+		*vsel = DIV_ROUND_UP(uV - 900000, 25000);
+	else
+		*vsel = 26 + DIV_ROUND_UP(uV - 1550000, 50000);
+
+	return 0;
+}
+
+static int tps65218_dcdc1_2_vsel_to_uv(unsigned int vsel)
+{
+	int uV = 0;
+
+	if (vsel <= 50)
+		uV = vsel * 10000 + 850000;
+	else
+		uV = (vsel - 50) * 25000 + 1350000;
+
+	return uV;
+}
+
+static int tps65218_dcdc1_2_uv_to_vsel(int uV, unsigned int *vsel)
+{
+	if (uV <= 1350000)
+		*vsel = DIV_ROUND_UP(uV - 850000, 10000);
+	else
+		*vsel = 50 + DIV_ROUND_UP(uV - 1350000, 25000);
+
+	return 0;
+}
+
+static int tps65218_dcd4_vsel_to_uv(unsigned int vsel)
+{
+	int uV = 0;
+
+	if (vsel <= 15)
+		uV = vsel * 25000 + 1175000;
+	else
+		uV = (vsel - 15) * 50000 + 1550000;
+
+	return uV;
+}
+
+static int tps65218_dcdc4_uv_to_vsel(int uV, unsigned int *vsel)
+{
+	if (uV <= 1550000)
+		*vsel = DIV_ROUND_UP(uV - 1175000, 25000);
+	else
+		*vsel = 15 + DIV_ROUND_UP(uV - 1550000, 50000);
+
+	return 0;
+}
+
+static struct tps_info tps65218_pmic_regs[] = {
+	TPS65218_INFO(0, "DCDC1", 850000, 1675000, tps65218_dcdc1_2_vsel_to_uv,
+		      tps65218_dcdc1_2_uv_to_vsel),
+	TPS65218_INFO(1, "DCDC2", 850000, 1675000, tps65218_dcdc1_2_vsel_to_uv,
+		      tps65218_dcdc1_2_uv_to_vsel),
+	TPS65218_INFO(2, "DCDC3", 900000, 3400000,
+		      tps65218_ldo1_dcdc3_vsel_to_uv,
+		      tps65218_ldo1_dcdc3_uv_to_vsel),
+	TPS65218_INFO(3, "DCDC4", 1175000, 3400000, tps65218_dcd4_vsel_to_uv,
+		      tps65218_dcdc4_uv_to_vsel),
+	TPS65218_INFO(4, "DCDC5", 1000000, 1000000, NULL, NULL),
+	TPS65218_INFO(5, "DCDC6", 1800000, 1800000, NULL, NULL),
+	TPS65218_INFO(6, "LDO1", 900000, 3400000,
+		      tps65218_ldo1_dcdc3_vsel_to_uv,
+		      tps65218_ldo1_dcdc3_uv_to_vsel),
+};
+
+#define TPS65218_OF_MATCH(comp, label) \
+	{ \
+		.compatible = comp, \
+		.data = &label, \
+	}
+
+static const struct of_device_id tps65218_of_match[] = {
+	TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[0]),
+	TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[1]),
+	TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[2]),
+	TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[3]),
+	TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[4]),
+	TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[5]),
+	TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[6]),
+};
+MODULE_DEVICE_TABLE(of, tps65218_of_match);
+
+static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
+					 unsigned selector)
+{
+	int ret;
+	struct tps65218 *tps = rdev_get_drvdata(dev);
+	unsigned int rid = rdev_get_id(dev);
+
+	/* Set the voltage based on vsel value and write protect level is 2 */
+	ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
+				selector, TPS65218_PROTECT_L1);
+
+	/* Set GO bit for DCDC1/2 to initiate voltage transistion */
+	switch (rid) {
+	case TPS65218_DCDC_1:
+	case TPS65218_DCDC_2:
+		ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
+					TPS65218_SLEW_RATE_GO,
+					TPS65218_SLEW_RATE_GO,
+					TPS65218_PROTECT_L1);
+		break;
+	}
+
+	return ret;
+}
+
+static int tps65218_pmic_map_voltage(struct regulator_dev *dev,
+				     int min_uV, int max_uV)
+{
+	struct tps65218 *tps = rdev_get_drvdata(dev);
+	unsigned int sel, rid = rdev_get_id(dev);
+	int ret;
+
+	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
+		return -EINVAL;
+
+	if (min_uV < tps->info[rid]->min_uV)
+		min_uV = tps->info[rid]->min_uV;
+
+	if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV)
+		return -EINVAL;
+
+	ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
+	if (ret)
+		return ret;
+
+	return sel;
+}
+
+static int tps65218_pmic_list_voltage(struct regulator_dev *dev,
+					unsigned selector)
+{
+	struct tps65218 *tps = rdev_get_drvdata(dev);
+	unsigned int rid = rdev_get_id(dev);
+
+	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
+		return -EINVAL;
+
+	if (selector >= dev->desc->n_voltages)
+		return -EINVAL;
+
+	return tps->info[rid]->vsel_to_uv(selector);
+}
+
+static int tps65218_pmic_enable(struct regulator_dev *dev)
+{
+	struct tps65218 *tps = rdev_get_drvdata(dev);
+	unsigned int rid = rdev_get_id(dev);
+
+	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
+		return -EINVAL;
+
+	/* Enable the regulator and password protection is level 1 */
+	return tps65218_set_bits(tps, dev->desc->enable_reg,
+				 dev->desc->enable_mask, dev->desc->enable_mask,
+				 TPS65218_PROTECT_L1);
+}
+
+static int tps65218_pmic_disable(struct regulator_dev *dev)
+{
+	struct tps65218 *tps = rdev_get_drvdata(dev);
+	unsigned int rid = rdev_get_id(dev);
+
+	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
+		return -EINVAL;
+
+	/* Disable the regulator and password protection is level 1 */
+	return tps65218_clear_bits(tps, dev->desc->enable_reg,
+				   dev->desc->enable_mask, TPS65218_PROTECT_L1);
+}
+
+static int tps65218_set_voltage_time_sel(struct regulator_dev *rdev,
+	unsigned int old_selector, unsigned int new_selector)
+{
+	int old_uv, new_uv;
+
+	old_uv = tps65218_pmic_list_voltage(rdev, old_selector);
+	if (old_uv < 0)
+		return old_uv;
+
+	new_uv = tps65218_pmic_list_voltage(rdev, new_selector);
+	if (new_uv < 0)
+		return new_uv;
+
+	return DIV_ROUND_UP(abs(old_uv - new_uv), tps65218_ramp_delay);
+}
+
+/* Operations permitted on DCDC1, DCDC2 */
+static struct regulator_ops tps65218_dcdc12_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= tps65218_pmic_enable,
+	.disable		= tps65218_pmic_disable,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= tps65218_pmic_set_voltage_sel,
+	.list_voltage		= tps65218_pmic_list_voltage,
+	.map_voltage		= tps65218_pmic_map_voltage,
+	.set_voltage_time_sel	= tps65218_set_voltage_time_sel,
+};
+
+/* Operations permitted on DCDC3, DCDC4 and LDO1 */
+static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= tps65218_pmic_enable,
+	.disable		= tps65218_pmic_disable,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= tps65218_pmic_set_voltage_sel,
+	.list_voltage		= tps65218_pmic_list_voltage,
+	.map_voltage		= tps65218_pmic_map_voltage,
+};
+
+/* Operations permitted on DCDC5, DCDC6 */
+static struct regulator_ops tps65218_dcdc56_pmic_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= tps65218_pmic_enable,
+	.disable		= tps65218_pmic_disable,
+};
+
+static const struct regulator_desc regulators[] = {
+	TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
+			   TPS65218_REG_CONTROL_DCDC1,
+			   TPS65218_CONTROL_DCDC1_MASK,
+			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL),
+	TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
+			   TPS65218_REG_CONTROL_DCDC2,
+			   TPS65218_CONTROL_DCDC2_MASK,
+			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL),
+	TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
+			   64, TPS65218_REG_CONTROL_DCDC3,
+			   TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
+			   TPS65218_ENABLE1_DC3_EN, NULL),
+	TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
+			   53, TPS65218_REG_CONTROL_DCDC4,
+			   TPS65218_CONTROL_DCDC4_MASK,
+			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL),
+	TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
+			   1, -1, -1, TPS65218_REG_ENABLE1,
+			   TPS65218_ENABLE1_DC5_EN, NULL),
+	TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
+			   1, -1, -1, TPS65218_REG_ENABLE1,
+			   TPS65218_ENABLE1_DC6_EN, NULL),
+	TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
+			   TPS65218_REG_CONTROL_LDO1,
+			   TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
+			   TPS65218_ENABLE2_LDO1_EN, NULL),
+};
+
+static int tps65218_regulator_probe(struct platform_device *pdev)
+{
+	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_init_data *init_data;
+	const struct tps_info	*template;
+	struct regulator_dev *rdev;
+	const struct of_device_id	*match;
+	struct regulator_config config = { };
+	int id;
+
+	match = of_match_device(tps65218_of_match, &pdev->dev);
+	if (match) {
+		template = match->data;
+		id = template->id;
+		init_data = of_get_regulator_init_data(&pdev->dev,
+						      pdev->dev.of_node);
+	} else {
+		return -ENODEV;
+	}
+
+	platform_set_drvdata(pdev, tps);
+
+	tps->info[id] = &tps65218_pmic_regs[id];
+	config.dev = &pdev->dev;
+	config.init_data = init_data;
+	config.driver_data = tps;
+	config.regmap = tps->regmap;
+	config.of_node = pdev->dev.of_node;
+
+	rdev = regulator_register(&regulators[id], &config);
+	if (IS_ERR(rdev)) {
+		dev_err(tps->dev, "failed to register %s regulator\n",
+			pdev->name);
+		return PTR_ERR(rdev);
+	}
+
+	/* Save regulator */
+	tps->rdev[id] = rdev;
+
+	return 0;
+}
+
+static int tps65218_regulator_remove(struct platform_device *pdev)
+{
+	struct tps65218 *tps = platform_get_drvdata(pdev);
+	const struct of_device_id	*match;
+	const struct tps_info		*template;
+
+	match = of_match_device(tps65218_of_match, &pdev->dev);
+	template = match->data;
+	regulator_unregister(tps->rdev[template->id]);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver tps65218_regulator_driver = {
+	.driver = {
+		.name = "tps65218-pmic",
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(tps65218_of_match),
+	},
+	.probe = tps65218_regulator_probe,
+	.remove = tps65218_regulator_remove,
+};
+
+module_platform_driver(tps65218_regulator_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@...com>");
+MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
+MODULE_ALIAS("platform:tps65218-pmic");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

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