regulator: Add support for S2MPA01 regulator
authorSachin Kamat <sachin.kamat@linaro.org>
Fri, 14 Mar 2014 11:51:58 +0000 (17:21 +0530)
committerLee Jones <lee.jones@linaro.org>
Tue, 18 Mar 2014 10:56:30 +0000 (10:56 +0000)
Add support for S2MPA01 voltage and current regulator.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
drivers/regulator/Kconfig
drivers/regulator/Makefile
drivers/regulator/s2mpa01.c [new file with mode: 0644]

index 6a79328..8f8e671 100644 (file)
@@ -416,6 +416,13 @@ config REGULATOR_RC5T583
          through regulator interface. The device supports multiple DCDC/LDO
          outputs which can be controlled by i2c communication.
 
+config REGULATOR_S2MPA01
+       tristate "Samsung S2MPA01 voltage regulator"
+       depends on MFD_SEC_CORE
+       help
+        This driver controls Samsung S2MPA01 voltage output regulator
+        via I2C bus. S2MPA01 has 10 Bucks and 26 LDO outputs.
+
 config REGULATOR_S2MPS11
        tristate "Samsung S2MPS11 voltage regulator"
        depends on MFD_SEC_CORE
index 979f9dd..b3ece84 100644 (file)
@@ -57,6 +57,7 @@ obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o
 obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
 obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o
+obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
 obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
 obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
 obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
diff --git a/drivers/regulator/s2mpa01.c b/drivers/regulator/s2mpa01.c
new file mode 100644 (file)
index 0000000..808b3aa
--- /dev/null
@@ -0,0 +1,481 @@
+/*
+ * Copyright (c) 2013 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/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/samsung/core.h>
+#include <linux/mfd/samsung/s2mpa01.h>
+
+#define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)
+
+struct s2mpa01_info {
+       int ramp_delay24;
+       int ramp_delay3;
+       int ramp_delay5;
+       int ramp_delay16;
+       int ramp_delay7;
+       int ramp_delay8910;
+};
+
+static int get_ramp_delay(int ramp_delay)
+{
+       unsigned char cnt = 0;
+
+       ramp_delay /= 6250;
+
+       while (true) {
+               ramp_delay = ramp_delay >> 1;
+               if (ramp_delay == 0)
+                       break;
+               cnt++;
+       }
+
+       if (cnt > 3)
+               cnt = 3;
+
+       return cnt;
+}
+
+static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
+                                  unsigned int old_selector,
+                                  unsigned int new_selector)
+{
+       struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
+       unsigned int ramp_delay = 0;
+       int old_volt, new_volt;
+
+       switch (rdev->desc->id) {
+       case S2MPA01_BUCK2:
+       case S2MPA01_BUCK4:
+               ramp_delay = s2mpa01->ramp_delay24;
+               break;
+       case S2MPA01_BUCK3:
+               ramp_delay = s2mpa01->ramp_delay3;
+               break;
+       case S2MPA01_BUCK5:
+               ramp_delay = s2mpa01->ramp_delay5;
+               break;
+       case S2MPA01_BUCK1:
+       case S2MPA01_BUCK6:
+               ramp_delay = s2mpa01->ramp_delay16;
+               break;
+       case S2MPA01_BUCK7:
+               ramp_delay = s2mpa01->ramp_delay7;
+               break;
+       case S2MPA01_BUCK8:
+       case S2MPA01_BUCK9:
+       case S2MPA01_BUCK10:
+               ramp_delay = s2mpa01->ramp_delay8910;
+               break;
+       }
+
+       if (ramp_delay == 0)
+               ramp_delay = rdev->desc->ramp_delay;
+
+       old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
+       new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
+
+       return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
+}
+
+static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+       struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
+       unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
+       unsigned int ramp_enable = 1, enable_shift = 0;
+       int ret;
+
+       switch (rdev->desc->id) {
+       case S2MPA01_BUCK1:
+               enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
+               if (!ramp_delay) {
+                       ramp_enable = 0;
+                       break;
+               }
+
+               if (ramp_delay > s2mpa01->ramp_delay16)
+                       s2mpa01->ramp_delay16 = ramp_delay;
+               else
+                       ramp_delay = s2mpa01->ramp_delay16;
+
+               ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
+               ramp_reg = S2MPA01_REG_RAMP1;
+               break;
+       case S2MPA01_BUCK2:
+               enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
+               if (!ramp_delay) {
+                       ramp_enable = 0;
+                       break;
+               }
+
+               if (ramp_delay > s2mpa01->ramp_delay24)
+                       s2mpa01->ramp_delay24 = ramp_delay;
+               else
+                       ramp_delay = s2mpa01->ramp_delay24;
+
+               ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
+               ramp_reg = S2MPA01_REG_RAMP1;
+               break;
+       case S2MPA01_BUCK3:
+               enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
+               if (!ramp_delay) {
+                       ramp_enable = 0;
+                       break;
+               }
+
+               s2mpa01->ramp_delay3 = ramp_delay;
+               ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
+               ramp_reg = S2MPA01_REG_RAMP1;
+               break;
+       case S2MPA01_BUCK4:
+               enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
+               if (!ramp_delay) {
+                       ramp_enable = 0;
+                       break;
+               }
+
+               if (ramp_delay > s2mpa01->ramp_delay24)
+                       s2mpa01->ramp_delay24 = ramp_delay;
+               else
+                       ramp_delay = s2mpa01->ramp_delay24;
+
+               ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
+               ramp_reg = S2MPA01_REG_RAMP1;
+               break;
+       case S2MPA01_BUCK5:
+               s2mpa01->ramp_delay5 = ramp_delay;
+               ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
+               break;
+       case S2MPA01_BUCK6:
+               if (ramp_delay > s2mpa01->ramp_delay16)
+                       s2mpa01->ramp_delay16 = ramp_delay;
+               else
+                       ramp_delay = s2mpa01->ramp_delay16;
+
+               ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
+               break;
+       case S2MPA01_BUCK7:
+               s2mpa01->ramp_delay7 = ramp_delay;
+               ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
+               break;
+       case S2MPA01_BUCK8:
+       case S2MPA01_BUCK9:
+       case S2MPA01_BUCK10:
+               if (ramp_delay > s2mpa01->ramp_delay8910)
+                       s2mpa01->ramp_delay8910 = ramp_delay;
+               else
+                       ramp_delay = s2mpa01->ramp_delay8910;
+
+               ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
+               break;
+       default:
+               return 0;
+       }
+
+       if (!ramp_enable)
+               goto ramp_disable;
+
+       if (enable_shift) {
+               ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
+                                       1 << enable_shift, 1 << enable_shift);
+               if (ret) {
+                       dev_err(&rdev->dev, "failed to enable ramp rate\n");
+                       return ret;
+               }
+       }
+
+       ramp_val = get_ramp_delay(ramp_delay);
+
+       return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
+                                 ramp_val << ramp_shift);
+
+ramp_disable:
+       return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
+                                 1 << enable_shift, 0);
+}
+
+static struct regulator_ops s2mpa01_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 s2mpa01_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   = s2mpa01_regulator_set_voltage_time_sel,
+       .set_ramp_delay         = s2mpa01_set_ramp_delay,
+};
+
+#define regulator_desc_ldo1(num)       {               \
+       .name           = "LDO"#num,                    \
+       .id             = S2MPA01_LDO##num,             \
+       .ops            = &s2mpa01_ldo_ops,             \
+       .type           = REGULATOR_VOLTAGE,            \
+       .owner          = THIS_MODULE,                  \
+       .min_uV         = S2MPA01_LDO_MIN,              \
+       .uV_step        = S2MPA01_LDO_STEP1,            \
+       .n_voltages     = S2MPA01_LDO_N_VOLTAGES,       \
+       .vsel_reg       = S2MPA01_REG_L1CTRL + num - 1, \
+       .vsel_mask      = S2MPA01_LDO_VSEL_MASK,        \
+       .enable_reg     = S2MPA01_REG_L1CTRL + num - 1, \
+       .enable_mask    = S2MPA01_ENABLE_MASK           \
+}
+#define regulator_desc_ldo2(num)       {               \
+       .name           = "LDO"#num,                    \
+       .id             = S2MPA01_LDO##num,             \
+       .ops            = &s2mpa01_ldo_ops,             \
+       .type           = REGULATOR_VOLTAGE,            \
+       .owner          = THIS_MODULE,                  \
+       .min_uV         = S2MPA01_LDO_MIN,              \
+       .uV_step        = S2MPA01_LDO_STEP2,            \
+       .n_voltages     = S2MPA01_LDO_N_VOLTAGES,       \
+       .vsel_reg       = S2MPA01_REG_L1CTRL + num - 1, \
+       .vsel_mask      = S2MPA01_LDO_VSEL_MASK,        \
+       .enable_reg     = S2MPA01_REG_L1CTRL + num - 1, \
+       .enable_mask    = S2MPA01_ENABLE_MASK           \
+}
+
+#define regulator_desc_buck1_4(num)    {                       \
+       .name           = "BUCK"#num,                           \
+       .id             = S2MPA01_BUCK##num,                    \
+       .ops            = &s2mpa01_buck_ops,                    \
+       .type           = REGULATOR_VOLTAGE,                    \
+       .owner          = THIS_MODULE,                          \
+       .min_uV         = S2MPA01_BUCK_MIN1,                    \
+       .uV_step        = S2MPA01_BUCK_STEP1,                   \
+       .n_voltages     = S2MPA01_BUCK_N_VOLTAGES,              \
+       .ramp_delay     = S2MPA01_RAMP_DELAY,                   \
+       .vsel_reg       = S2MPA01_REG_B1CTRL2 + (num - 1) * 2,  \
+       .vsel_mask      = S2MPA01_BUCK_VSEL_MASK,               \
+       .enable_reg     = S2MPA01_REG_B1CTRL1 + (num - 1) * 2,  \
+       .enable_mask    = S2MPA01_ENABLE_MASK                   \
+}
+
+#define regulator_desc_buck5   {                               \
+       .name           = "BUCK5",                              \
+       .id             = S2MPA01_BUCK5,                        \
+       .ops            = &s2mpa01_buck_ops,                    \
+       .type           = REGULATOR_VOLTAGE,                    \
+       .owner          = THIS_MODULE,                          \
+       .min_uV         = S2MPA01_BUCK_MIN2,                    \
+       .uV_step        = S2MPA01_BUCK_STEP1,                   \
+       .n_voltages     = S2MPA01_BUCK_N_VOLTAGES,              \
+       .ramp_delay     = S2MPA01_RAMP_DELAY,                   \
+       .vsel_reg       = S2MPA01_REG_B5CTRL2,                  \
+       .vsel_mask      = S2MPA01_BUCK_VSEL_MASK,               \
+       .enable_reg     = S2MPA01_REG_B5CTRL1,                  \
+       .enable_mask    = S2MPA01_ENABLE_MASK                   \
+}
+
+#define regulator_desc_buck6_7(num)    {                       \
+       .name           = "BUCK"#num,                           \
+       .id             = S2MPA01_BUCK##num,                    \
+       .ops            = &s2mpa01_buck_ops,                    \
+       .type           = REGULATOR_VOLTAGE,                    \
+       .owner          = THIS_MODULE,                          \
+       .min_uV         = S2MPA01_BUCK_MIN1,                    \
+       .uV_step        = S2MPA01_BUCK_STEP1,                   \
+       .n_voltages     = S2MPA01_BUCK_N_VOLTAGES,              \
+       .ramp_delay     = S2MPA01_RAMP_DELAY,                   \
+       .vsel_reg       = S2MPA01_REG_B6CTRL2 + (num - 6) * 2,  \
+       .vsel_mask      = S2MPA01_BUCK_VSEL_MASK,               \
+       .enable_reg     = S2MPA01_REG_B6CTRL1 + (num - 6) * 2,  \
+       .enable_mask    = S2MPA01_ENABLE_MASK                   \
+}
+
+#define regulator_desc_buck8   {                               \
+       .name           = "BUCK8",                              \
+       .id             = S2MPA01_BUCK8,                        \
+       .ops            = &s2mpa01_buck_ops,                    \
+       .type           = REGULATOR_VOLTAGE,                    \
+       .owner          = THIS_MODULE,                          \
+       .min_uV         = S2MPA01_BUCK_MIN2,                    \
+       .uV_step        = S2MPA01_BUCK_STEP2,                   \
+       .n_voltages     = S2MPA01_BUCK_N_VOLTAGES,              \
+       .ramp_delay     = S2MPA01_RAMP_DELAY,                   \
+       .vsel_reg       = S2MPA01_REG_B8CTRL2,                  \
+       .vsel_mask      = S2MPA01_BUCK_VSEL_MASK,               \
+       .enable_reg     = S2MPA01_REG_B8CTRL1,                  \
+       .enable_mask    = S2MPA01_ENABLE_MASK                   \
+}
+
+#define regulator_desc_buck9   {                               \
+       .name           = "BUCK9",                              \
+       .id             = S2MPA01_BUCK9,                        \
+       .ops            = &s2mpa01_buck_ops,                    \
+       .type           = REGULATOR_VOLTAGE,                    \
+       .owner          = THIS_MODULE,                          \
+       .min_uV         = S2MPA01_BUCK_MIN4,                    \
+       .uV_step        = S2MPA01_BUCK_STEP2,                   \
+       .n_voltages     = S2MPA01_BUCK_N_VOLTAGES,              \
+       .ramp_delay     = S2MPA01_RAMP_DELAY,                   \
+       .vsel_reg       = S2MPA01_REG_B9CTRL2,                  \
+       .vsel_mask      = S2MPA01_BUCK_VSEL_MASK,               \
+       .enable_reg     = S2MPA01_REG_B9CTRL1,                  \
+       .enable_mask    = S2MPA01_ENABLE_MASK                   \
+}
+
+#define regulator_desc_buck10  {                               \
+       .name           = "BUCK10",                             \
+       .id             = S2MPA01_BUCK10,                       \
+       .ops            = &s2mpa01_buck_ops,                    \
+       .type           = REGULATOR_VOLTAGE,                    \
+       .owner          = THIS_MODULE,                          \
+       .min_uV         = S2MPA01_BUCK_MIN3,                    \
+       .uV_step        = S2MPA01_BUCK_STEP2,                   \
+       .n_voltages     = S2MPA01_BUCK_N_VOLTAGES,              \
+       .ramp_delay     = S2MPA01_RAMP_DELAY,                   \
+       .vsel_reg       = S2MPA01_REG_B10CTRL2,                 \
+       .vsel_mask      = S2MPA01_BUCK_VSEL_MASK,               \
+       .enable_reg     = S2MPA01_REG_B10CTRL1,                 \
+       .enable_mask    = S2MPA01_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_buck1_4(1),
+       regulator_desc_buck1_4(2),
+       regulator_desc_buck1_4(3),
+       regulator_desc_buck1_4(4),
+       regulator_desc_buck5,
+       regulator_desc_buck6_7(6),
+       regulator_desc_buck6_7(7),
+       regulator_desc_buck8,
+       regulator_desc_buck9,
+       regulator_desc_buck10,
+};
+
+static int s2mpa01_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 of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
+       struct device_node *reg_np = NULL;
+       struct regulator_config config = { };
+       struct s2mpa01_info *s2mpa01;
+       int i;
+
+       s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
+       if (!s2mpa01)
+               return -ENOMEM;
+
+       for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
+               rdata[i].name = regulators[i].name;
+
+       if (iodev->dev->of_node) {
+               reg_np = of_get_child_by_name(iodev->dev->of_node,
+                                                       "regulators");
+                       if (!reg_np) {
+                               dev_err(&pdev->dev,
+                                       "could not find regulators sub-node\n");
+                               return -EINVAL;
+                       }
+
+               of_regulator_match(&pdev->dev, reg_np, rdata,
+                                               S2MPA01_REGULATOR_MAX);
+               of_node_put(reg_np);
+       }
+
+       platform_set_drvdata(pdev, s2mpa01);
+
+       config.dev = &pdev->dev;
+       config.regmap = iodev->regmap_pmic;
+       config.driver_data = s2mpa01;
+
+       for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
+               struct regulator_dev *rdev;
+               if (pdata)
+                       config.init_data = pdata->regulators[i].initdata;
+               else
+                       config.init_data = rdata[i].init_data;
+
+               if (reg_np)
+                       config.of_node = rdata[i].of_node;
+
+               rdev = devm_regulator_register(&pdev->dev,
+                                               &regulators[i], &config);
+               if (IS_ERR(rdev)) {
+                       dev_err(&pdev->dev, "regulator init failed for %d\n",
+                               i);
+                       return PTR_ERR(rdev);
+               }
+       }
+
+       return 0;
+}
+
+static const struct platform_device_id s2mpa01_pmic_id[] = {
+       { "s2mpa01-pmic", 0},
+       { },
+};
+MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
+
+static struct platform_driver s2mpa01_pmic_driver = {
+       .driver = {
+               .name = "s2mpa01-pmic",
+               .owner = THIS_MODULE,
+       },
+       .probe = s2mpa01_pmic_probe,
+       .id_table = s2mpa01_pmic_id,
+};
+
+module_platform_driver(s2mpa01_pmic_driver);
+
+/* Module information */
+MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
+MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
+MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
+MODULE_LICENSE("GPL");