regulator: s2mps11: Add samsung s2mps11 regulator driver

This patch add Samsung S2MPS11 regulator driver.
The S2MPS11 can support 10 Bucks and 38 LDOs and RTC.
Especially, S2MPS11 is designed for high performance
Samsung application processor.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

3 files changed, 377 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 27fe52f592d..3923a3b2e47 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -256,6 +256,14 @@ config REGULATOR_RC5T583
 	  through regulator interface. The device supports multiple DCDC/LDO
 	  outputs which can be controlled by i2c communication.
 
+config REGULATOR_S2MPS11
+	tristate "Samsung S2MPS11 voltage regulator"
+	depends on MFD_SEC_CORE
+	help
+	 This driver supports a Samsung S2MPS11 voltage output regulator
+	 via I2C bus. S2MPS11 is comprised of high efficient Buck converters
+	 including Dual-Phase Buck converter, Buck-Boost converter, various LDOs.
+
 config REGULATOR_S5M8767
 	tristate "Samsung S5M8767A voltage regulator"
 	depends on MFD_S5M_CORE
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index c7460888edc..a70c4f4525a 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
 obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
 obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o
+obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
 obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
 obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
new file mode 100644
index 00000000000..514cf5416a3
--- /dev/null
+++ b/drivers/regulator/s2mps11.c
@@ -0,0 +1,368 @@
+/*
+ * s2mps11.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd
+ *              http://www.samsung.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/samsung/core.h>
+#include <linux/mfd/samsung/s2mps11.h>
+
+struct s2mps11_info {
+	struct device *dev;
+	struct sec_pmic_dev *iodev;
+	struct regulator_dev **rdev;
+
+	int ramp_delay2;
+	int ramp_delay34;
+	int ramp_delay5;
+	int ramp_delay16;
+	int ramp_delay7810;
+	int ramp_delay9;
+
+	bool buck6_ramp;
+	bool buck2_ramp;
+	bool buck3_ramp;
+	bool buck4_ramp;
+};
+
+static int get_ramp_delay(int ramp_delay)
+{
+	unsigned char cnt = 0;
+
+	ramp_delay /= 6;
+
+	while (true) {
+		ramp_delay = ramp_delay >> 1;
+		if (ramp_delay == 0)
+			break;
+		cnt++;
+	}
+	return cnt;
+}
+
+static struct regulator_ops s2mps11_ldo_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.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,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+};
+
+static struct regulator_ops s2mps11_buck_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.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,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+};
+
+#define regulator_desc_ldo1(num)	{		\
+	.name		= "LDO"#num,			\
+	.id		= S2MPS11_LDO##num,		\
+	.ops		= &s2mps11_ldo_ops,		\
+	.type		= REGULATOR_VOLTAGE,		\
+	.owner		= THIS_MODULE,			\
+	.min_uV		= S2MPS11_LDO_MIN,		\
+	.uV_step	= S2MPS11_LDO_STEP1,		\
+	.n_voltages	= S2MPS11_LDO_N_VOLTAGES,	\
+	.vsel_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
+	.vsel_mask	= S2MPS11_LDO_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
+	.enable_mask	= S2MPS11_ENABLE_MASK		\
+}
+#define regulator_desc_ldo2(num)	{		\
+	.name		= "LDO"#num,			\
+	.id		= S2MPS11_LDO##num,		\
+	.ops		= &s2mps11_ldo_ops,		\
+	.type		= REGULATOR_VOLTAGE,		\
+	.owner		= THIS_MODULE,			\
+	.min_uV		= S2MPS11_LDO_MIN,		\
+	.uV_step	= S2MPS11_LDO_STEP2,		\
+	.n_voltages	= S2MPS11_LDO_N_VOLTAGES,	\
+	.vsel_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
+	.vsel_mask	= S2MPS11_LDO_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
+	.enable_mask	= S2MPS11_ENABLE_MASK		\
+}
+
+#define regulator_desc_buck1_4(num)	{			\
+	.name		= "BUCK"#num,				\
+	.id		= S2MPS11_BUCK##num,			\
+	.ops		= &s2mps11_buck_ops,			\
+	.type		= REGULATOR_VOLTAGE,			\
+	.owner		= THIS_MODULE,				\
+	.min_uV		= S2MPS11_BUCK_MIN1,			\
+	.uV_step	= S2MPS11_BUCK_STEP1,			\
+	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
+	.vsel_reg	= S2MPS11_REG_B1CTRL2 + (num - 1) * 2,	\
+	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_B1CTRL1 + (num - 1) * 2,	\
+	.enable_mask	= S2MPS11_ENABLE_MASK			\
+}
+
+#define regulator_desc_buck5	{				\
+	.name		= "BUCK5",				\
+	.id		= S2MPS11_BUCK5,			\
+	.ops		= &s2mps11_buck_ops,			\
+	.type		= REGULATOR_VOLTAGE,			\
+	.owner		= THIS_MODULE,				\
+	.min_uV		= S2MPS11_BUCK_MIN1,			\
+	.uV_step	= S2MPS11_BUCK_STEP1,			\
+	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
+	.vsel_reg	= S2MPS11_REG_B5CTRL2,			\
+	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_B5CTRL1,			\
+	.enable_mask	= S2MPS11_ENABLE_MASK			\
+}
+
+#define regulator_desc_buck6_8(num)	{			\
+	.name		= "BUCK"#num,				\
+	.id		= S2MPS11_BUCK##num,			\
+	.ops		= &s2mps11_buck_ops,			\
+	.type		= REGULATOR_VOLTAGE,			\
+	.owner		= THIS_MODULE,				\
+	.min_uV		= S2MPS11_BUCK_MIN1,			\
+	.uV_step	= S2MPS11_BUCK_STEP1,			\
+	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
+	.vsel_reg	= S2MPS11_REG_B6CTRL2 + (num - 6) * 2,	\
+	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_B6CTRL1 + (num - 6) * 2,	\
+	.enable_mask	= S2MPS11_ENABLE_MASK			\
+}
+
+#define regulator_desc_buck9	{				\
+	.name		= "BUCK9",				\
+	.id		= S2MPS11_BUCK9,			\
+	.ops		= &s2mps11_buck_ops,			\
+	.type		= REGULATOR_VOLTAGE,			\
+	.owner		= THIS_MODULE,				\
+	.min_uV		= S2MPS11_BUCK_MIN3,			\
+	.uV_step	= S2MPS11_BUCK_STEP3,			\
+	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
+	.vsel_reg	= S2MPS11_REG_B9CTRL2,			\
+	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_B9CTRL1,			\
+	.enable_mask	= S2MPS11_ENABLE_MASK			\
+}
+
+#define regulator_desc_buck10	{				\
+	.name		= "BUCK10",				\
+	.id		= S2MPS11_BUCK10,			\
+	.ops		= &s2mps11_buck_ops,			\
+	.type		= REGULATOR_VOLTAGE,			\
+	.owner		= THIS_MODULE,				\
+	.min_uV		= S2MPS11_BUCK_MIN2,			\
+	.uV_step	= S2MPS11_BUCK_STEP2,			\
+	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
+	.vsel_reg	= S2MPS11_REG_B9CTRL2,			\
+	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK		\
+	.enable_reg	= S2MPS11_REG_B9CTRL1,			\
+	.enable_mask	= S2MPS11_ENABLE_MASK			\
+}
+
+static struct regulator_desc regulators[] = {
+	regulator_desc_ldo2(1),
+	regulator_desc_ldo1(2),
+	regulator_desc_ldo1(3),
+	regulator_desc_ldo1(4),
+	regulator_desc_ldo1(5),
+	regulator_desc_ldo2(6),
+	regulator_desc_ldo1(7),
+	regulator_desc_ldo1(8),
+	regulator_desc_ldo1(9),
+	regulator_desc_ldo1(10),
+	regulator_desc_ldo2(11),
+	regulator_desc_ldo1(12),
+	regulator_desc_ldo1(13),
+	regulator_desc_ldo1(14),
+	regulator_desc_ldo1(15),
+	regulator_desc_ldo1(16),
+	regulator_desc_ldo1(17),
+	regulator_desc_ldo1(18),
+	regulator_desc_ldo1(19),
+	regulator_desc_ldo1(20),
+	regulator_desc_ldo1(21),
+	regulator_desc_ldo2(22),
+	regulator_desc_ldo2(23),
+	regulator_desc_ldo1(24),
+	regulator_desc_ldo1(25),
+	regulator_desc_ldo1(26),
+	regulator_desc_ldo2(27),
+	regulator_desc_ldo1(28),
+	regulator_desc_ldo1(29),
+	regulator_desc_ldo1(30),
+	regulator_desc_ldo1(31),
+	regulator_desc_ldo1(32),
+	regulator_desc_ldo1(33),
+	regulator_desc_ldo1(34),
+	regulator_desc_ldo1(35),
+	regulator_desc_ldo1(36),
+	regulator_desc_ldo1(37),
+	regulator_desc_ldo1(38),
+	regulator_desc_buck1_4(1),
+	regulator_desc_buck1_4(2),
+	regulator_desc_buck1_4(3),
+	regulator_desc_buck1_4(4),
+	regulator_desc_buck5,
+	regulator_desc_buck6_8(6),
+	regulator_desc_buck6_8(7),
+	regulator_desc_buck6_8(8),
+	regulator_desc_buck9,
+	regulator_desc_buck10,
+};
+
+static __devinit int s2mps11_pmic_probe(struct platform_device *pdev)
+{
+	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
+	struct regulator_config config = { };
+	struct regulator_dev **rdev;
+	struct s2mps11_info *s2mps11;
+	int i, ret, size;
+	unsigned char ramp_enable, ramp_reg = 0;
+
+	if (!pdata) {
+		dev_err(pdev->dev.parent, "Platform data not supplied\n");
+		return -ENODEV;
+	}
+
+	s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
+				GFP_KERNEL);
+	if (!s2mps11)
+		return -ENOMEM;
+
+	size = sizeof(struct regulator_dev *) * S2MPS11_REGULATOR_MAX;
+	s2mps11->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+	if (!s2mps11->rdev) {
+		return -ENOMEM;
+	}
+
+	rdev = s2mps11->rdev;
+	config.dev = &pdev->dev;
+	config.regmap = iodev->regmap;
+	platform_set_drvdata(pdev, s2mps11);
+
+	s2mps11->ramp_delay2 = pdata->buck2_ramp_delay;
+	s2mps11->ramp_delay34 = pdata->buck34_ramp_delay;
+	s2mps11->ramp_delay5 = pdata->buck5_ramp_delay;
+	s2mps11->ramp_delay16 = pdata->buck16_ramp_delay;
+	s2mps11->ramp_delay7810 = pdata->buck7810_ramp_delay;
+	s2mps11->ramp_delay9 = pdata->buck9_ramp_delay;
+
+	s2mps11->buck6_ramp = pdata->buck6_ramp_enable;
+	s2mps11->buck2_ramp = pdata->buck2_ramp_enable;
+	s2mps11->buck3_ramp = pdata->buck3_ramp_enable;
+	s2mps11->buck4_ramp = pdata->buck4_ramp_enable;
+
+	ramp_enable = (s2mps11->buck2_ramp << 3) | (s2mps11->buck3_ramp << 2) |
+		(s2mps11->buck4_ramp << 1) | s2mps11->buck6_ramp ;
+
+	if (ramp_enable) {
+		if (s2mps11->buck2_ramp)
+			ramp_reg |= get_ramp_delay(s2mps11->ramp_delay2) >> 6;
+		if (s2mps11->buck3_ramp || s2mps11->buck4_ramp)
+			ramp_reg |= get_ramp_delay(s2mps11->ramp_delay34) >> 4;
+		sec_reg_update(s2mps11->iodev, S2MPS11_REG_RAMP,
+			ramp_reg | ramp_enable, 0xff);
+	}
+
+	ramp_reg &= 0x00;
+	ramp_reg |= get_ramp_delay(s2mps11->ramp_delay5) >> 6;
+	ramp_reg |= get_ramp_delay(s2mps11->ramp_delay16) >> 4;
+	ramp_reg |= get_ramp_delay(s2mps11->ramp_delay7810) >> 2;
+	ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9);
+	sec_reg_update(s2mps11->iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg, 0xff);
+
+	for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
+
+		config.dev = s2mps11->dev;
+		config.regmap = iodev->regmap;
+		config.init_data = pdata->regulators[i].initdata;
+		config.driver_data = s2mps11;
+
+		rdev[i] = regulator_register(&regulators[i], &config);
+		if (IS_ERR(rdev[i])) {
+			ret = PTR_ERR(rdev[i]);
+			dev_err(s2mps11->dev, "regulator init failed for %d\n",
+					i);
+			rdev[i] = NULL;
+			goto err;
+		}
+	}
+
+	return 0;
+err:
+	for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+
+	return ret;
+}
+
+static int __devexit s2mps11_pmic_remove(struct platform_device *pdev)
+{
+	struct s2mps11_info *s2mps11 = platform_get_drvdata(pdev);
+	struct regulator_dev **rdev = s2mps11->rdev;
+	int i;
+
+	for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+
+	return 0;
+}
+
+static const struct platform_device_id s2mps11_pmic_id[] = {
+	{ "s2mps11-pmic", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
+
+static struct platform_driver s2mps11_pmic_driver = {
+	.driver = {
+		.name = "s2mps11-pmic",
+		.owner = THIS_MODULE,
+	},
+	.probe = s2mps11_pmic_probe,
+	.remove = __devexit_p(s2mps11_pmic_remove),
+	.id_table = s2mps11_pmic_id,
+};
+
+static int __init s2mps11_pmic_init(void)
+{
+	return platform_driver_register(&s2mps11_pmic_driver);
+}
+subsys_initcall(s2mps11_pmic_init);
+
+static void __exit s2mps11_pmic_exit(void)
+{
+	platform_driver_unregister(&s2mps11_pmic_driver);
+}
+module_exit(s2mps11_pmic_exit);
+
+/* Module information */
+MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
+MODULE_LICENSE("GPL");