--- /dev/null
+/*
+ * s5m8767.c
+ *
+ * Copyright (c) 2011 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/err.h>
+#include <linux/of_gpio.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/s5m8767.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
+
+#define S5M8767_OPMODE_NORMAL_MODE 0x1
+
+struct s5m8767_info {
+ struct device *dev;
+ struct sec_pmic_dev *iodev;
+ int num_regulators;
+ struct sec_opmode_data *opmode;
+
+ int ramp_delay;
+ bool buck2_ramp;
+ bool buck3_ramp;
+ bool buck4_ramp;
+
+ bool buck2_gpiodvs;
+ bool buck3_gpiodvs;
+ bool buck4_gpiodvs;
+ u8 buck2_vol[8];
+ u8 buck3_vol[8];
+ u8 buck4_vol[8];
+ int buck_gpios[3];
+ int buck_ds[3];
+ int buck_gpioindex;
+};
+
+struct sec_voltage_desc {
+ int max;
+ int min;
+ int step;
+};
+
+static const struct sec_voltage_desc buck_voltage_val1 = {
+ .max = 2225000,
+ .min = 650000,
+ .step = 6250,
+};
+
+static const struct sec_voltage_desc buck_voltage_val2 = {
+ .max = 1600000,
+ .min = 600000,
+ .step = 6250,
+};
+
+static const struct sec_voltage_desc buck_voltage_val3 = {
+ .max = 3000000,
+ .min = 750000,
+ .step = 12500,
+};
+
+static const struct sec_voltage_desc ldo_voltage_val1 = {
+ .max = 3950000,
+ .min = 800000,
+ .step = 50000,
+};
+
+static const struct sec_voltage_desc ldo_voltage_val2 = {
+ .max = 2375000,
+ .min = 800000,
+ .step = 25000,
+};
+
+static const struct sec_voltage_desc *reg_voltage_map[] = {
+ [S5M8767_LDO1] = &ldo_voltage_val2,
+ [S5M8767_LDO2] = &ldo_voltage_val2,
+ [S5M8767_LDO3] = &ldo_voltage_val1,
+ [S5M8767_LDO4] = &ldo_voltage_val1,
+ [S5M8767_LDO5] = &ldo_voltage_val1,
+ [S5M8767_LDO6] = &ldo_voltage_val2,
+ [S5M8767_LDO7] = &ldo_voltage_val2,
+ [S5M8767_LDO8] = &ldo_voltage_val2,
+ [S5M8767_LDO9] = &ldo_voltage_val1,
+ [S5M8767_LDO10] = &ldo_voltage_val1,
+ [S5M8767_LDO11] = &ldo_voltage_val1,
+ [S5M8767_LDO12] = &ldo_voltage_val1,
+ [S5M8767_LDO13] = &ldo_voltage_val1,
+ [S5M8767_LDO14] = &ldo_voltage_val1,
+ [S5M8767_LDO15] = &ldo_voltage_val2,
+ [S5M8767_LDO16] = &ldo_voltage_val1,
+ [S5M8767_LDO17] = &ldo_voltage_val1,
+ [S5M8767_LDO18] = &ldo_voltage_val1,
+ [S5M8767_LDO19] = &ldo_voltage_val1,
+ [S5M8767_LDO20] = &ldo_voltage_val1,
+ [S5M8767_LDO21] = &ldo_voltage_val1,
+ [S5M8767_LDO22] = &ldo_voltage_val1,
+ [S5M8767_LDO23] = &ldo_voltage_val1,
+ [S5M8767_LDO24] = &ldo_voltage_val1,
+ [S5M8767_LDO25] = &ldo_voltage_val1,
+ [S5M8767_LDO26] = &ldo_voltage_val1,
+ [S5M8767_LDO27] = &ldo_voltage_val1,
+ [S5M8767_LDO28] = &ldo_voltage_val1,
+ [S5M8767_BUCK1] = &buck_voltage_val1,
+ [S5M8767_BUCK2] = &buck_voltage_val2,
+ [S5M8767_BUCK3] = &buck_voltage_val2,
+ [S5M8767_BUCK4] = &buck_voltage_val2,
+ [S5M8767_BUCK5] = &buck_voltage_val1,
+ [S5M8767_BUCK6] = &buck_voltage_val1,
+ [S5M8767_BUCK7] = &buck_voltage_val3,
+ [S5M8767_BUCK8] = &buck_voltage_val3,
+ [S5M8767_BUCK9] = &buck_voltage_val3,
+};
+
+static unsigned int s5m8767_opmode_reg[][4] = {
+ /* {OFF, ON, LOWPOWER, SUSPEND} */
+ /* LDO1 ... LDO28 */
+ {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x0, 0x0, 0x0},
+ {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x0, 0x0, 0x0},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x0, 0x0, 0x0},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1},
+ {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
+
+ /* BUCK1 ... BUCK9 */
+ {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
+ {0x0, 0x3, 0x1, 0x1},
+ {0x0, 0x3, 0x1, 0x1},
+ {0x0, 0x3, 0x1, 0x1},
+ {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
+ {0x0, 0x3, 0x1, 0x1},
+ {0x0, 0x3, 0x1, 0x1},
+ {0x0, 0x3, 0x1, 0x1},
+ {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
+};
+
+static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
+ int *reg, int *enable_ctrl)
+{
+ int i;
+ unsigned int mode;
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO2:
+ *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
+ break;
+ case S5M8767_LDO3 ... S5M8767_LDO28:
+ *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
+ break;
+ case S5M8767_BUCK1:
+ *reg = S5M8767_REG_BUCK1CTRL1;
+ break;
+ case S5M8767_BUCK2 ... S5M8767_BUCK4:
+ *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
+ break;
+ case S5M8767_BUCK5:
+ *reg = S5M8767_REG_BUCK5CTRL1;
+ break;
+ case S5M8767_BUCK6 ... S5M8767_BUCK9:
+ *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ for (i = 0; i < s5m8767->num_regulators; i++) {
+ if (s5m8767->opmode[i].id == reg_id) {
+ mode = s5m8767->opmode[i].mode;
+ break;
+ }
+ }
+
+ if (i < s5m8767->num_regulators)
+ *enable_ctrl =
+ s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
+
+ return 0;
+}
+
+static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
+{
+ int reg;
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO2:
+ reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
+ break;
+ case S5M8767_LDO3 ... S5M8767_LDO28:
+ reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
+ break;
+ case S5M8767_BUCK1:
+ reg = S5M8767_REG_BUCK1CTRL2;
+ break;
+ case S5M8767_BUCK2:
+ reg = S5M8767_REG_BUCK2DVS1;
+ if (s5m8767->buck2_gpiodvs)
+ reg += s5m8767->buck_gpioindex;
+ break;
+ case S5M8767_BUCK3:
+ reg = S5M8767_REG_BUCK3DVS1;
+ if (s5m8767->buck3_gpiodvs)
+ reg += s5m8767->buck_gpioindex;
+ break;
+ case S5M8767_BUCK4:
+ reg = S5M8767_REG_BUCK4DVS1;
+ if (s5m8767->buck4_gpiodvs)
+ reg += s5m8767->buck_gpioindex;
+ break;
+ case S5M8767_BUCK5:
+ reg = S5M8767_REG_BUCK5CTRL2;
+ break;
+ case S5M8767_BUCK6 ... S5M8767_BUCK9:
+ reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return reg;
+}
+
+static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
+ int min_vol)
+{
+ int selector = 0;
+
+ if (desc == NULL)
+ return -EINVAL;
+
+ if (min_vol > desc->max)
+ return -EINVAL;
+
+ if (min_vol < desc->min)
+ min_vol = desc->min;
+
+ selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
+
+ if (desc->min + desc->step * selector > desc->max)
+ return -EINVAL;
+
+ return selector;
+}
+
+static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
+{
+ int temp_index = s5m8767->buck_gpioindex;
+
+ gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
+ gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
+ gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
+
+ return 0;
+}
+
+static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
+{
+ int temp_index = s5m8767->buck_gpioindex;
+
+ gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
+ gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
+ gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
+
+ return 0;
+}
+
+static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
+ int reg_id = rdev_get_id(rdev);
+ int old_index, index = 0;
+ u8 *buck234_vol = NULL;
+
+ switch (reg_id) {
+ case S5M8767_LDO1 ... S5M8767_LDO28:
+ break;
+ case S5M8767_BUCK1 ... S5M8767_BUCK6:
+ if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
+ buck234_vol = &s5m8767->buck2_vol[0];
+ else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
+ buck234_vol = &s5m8767->buck3_vol[0];
+ else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
+ buck234_vol = &s5m8767->buck4_vol[0];
+ break;
+ case S5M8767_BUCK7 ... S5M8767_BUCK8:
+ return -EINVAL;
+ case S5M8767_BUCK9:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
+ if (buck234_vol) {
+ while (*buck234_vol != selector) {
+ buck234_vol++;
+ index++;
+ }
+ old_index = s5m8767->buck_gpioindex;
+ s5m8767->buck_gpioindex = index;
+
+ if (index > old_index)
+ return s5m8767_set_high(s5m8767);
+ else
+ return s5m8767_set_low(s5m8767);
+ } else {
+ return regulator_set_voltage_sel_regmap(rdev, selector);
+ }
+}
+
+static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
+ unsigned int old_sel,
+ unsigned int new_sel)
+{
+ struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
+ const struct sec_voltage_desc *desc;
+ int reg_id = rdev_get_id(rdev);
+
+ desc = reg_voltage_map[reg_id];
+
+ if ((old_sel < new_sel) && s5m8767->ramp_delay)
+ return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
+ s5m8767->ramp_delay * 1000);
+ return 0;
+}
+
+static struct regulator_ops s5m8767_ops = {
+ .list_voltage = regulator_list_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 = s5m8767_set_voltage_sel,
+ .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
+};
+
+static struct regulator_ops s5m8767_buck78_ops = {
+ .list_voltage = regulator_list_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,
+};
+
+#define s5m8767_regulator_desc(_name) { \
+ .name = #_name, \
+ .id = S5M8767_##_name, \
+ .ops = &s5m8767_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+}
+
+#define s5m8767_regulator_buck78_desc(_name) { \
+ .name = #_name, \
+ .id = S5M8767_##_name, \
+ .ops = &s5m8767_buck78_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+}
+
+static struct regulator_desc regulators[] = {
+ s5m8767_regulator_desc(LDO1),
+ s5m8767_regulator_desc(LDO2),
+ s5m8767_regulator_desc(LDO3),
+ s5m8767_regulator_desc(LDO4),
+ s5m8767_regulator_desc(LDO5),
+ s5m8767_regulator_desc(LDO6),
+ s5m8767_regulator_desc(LDO7),
+ s5m8767_regulator_desc(LDO8),
+ s5m8767_regulator_desc(LDO9),
+ s5m8767_regulator_desc(LDO10),
+ s5m8767_regulator_desc(LDO11),
+ s5m8767_regulator_desc(LDO12),
+ s5m8767_regulator_desc(LDO13),
+ s5m8767_regulator_desc(LDO14),
+ s5m8767_regulator_desc(LDO15),
+ s5m8767_regulator_desc(LDO16),
+ s5m8767_regulator_desc(LDO17),
+ s5m8767_regulator_desc(LDO18),
+ s5m8767_regulator_desc(LDO19),
+ s5m8767_regulator_desc(LDO20),
+ s5m8767_regulator_desc(LDO21),
+ s5m8767_regulator_desc(LDO22),
+ s5m8767_regulator_desc(LDO23),
+ s5m8767_regulator_desc(LDO24),
+ s5m8767_regulator_desc(LDO25),
+ s5m8767_regulator_desc(LDO26),
+ s5m8767_regulator_desc(LDO27),
+ s5m8767_regulator_desc(LDO28),
+ s5m8767_regulator_desc(BUCK1),
+ s5m8767_regulator_desc(BUCK2),
+ s5m8767_regulator_desc(BUCK3),
+ s5m8767_regulator_desc(BUCK4),
+ s5m8767_regulator_desc(BUCK5),
+ s5m8767_regulator_desc(BUCK6),
+ s5m8767_regulator_buck78_desc(BUCK7),
+ s5m8767_regulator_buck78_desc(BUCK8),
+ s5m8767_regulator_desc(BUCK9),
+};
+
+/*
+ * Enable GPIO control over BUCK9 in regulator_config for that regulator.
+ */
+static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
+ struct sec_regulator_data *rdata,
+ struct regulator_config *config)
+{
+ int i, mode = 0;
+
+ if (rdata->id != S5M8767_BUCK9)
+ return;
+
+ /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
+ for (i = 0; i < s5m8767->num_regulators; i++) {
+ const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
+ if (opmode->id == rdata->id) {
+ mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
+ break;
+ }
+ }
+ if (mode != S5M8767_ENCTRL_USE_GPIO) {
+ dev_warn(s5m8767->dev,
+ "ext-control for %s: mismatched op_mode (%x), ignoring\n",
+ rdata->reg_node->name, mode);
+ return;
+ }
+
+ if (!gpio_is_valid(rdata->ext_control_gpio)) {
+ dev_warn(s5m8767->dev,
+ "ext-control for %s: GPIO not valid, ignoring\n",
+ rdata->reg_node->name);
+ return;
+ }
+
+ config->ena_gpio = rdata->ext_control_gpio;
+ config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+}
+
+/*
+ * Turn on GPIO control over BUCK9.
+ */
+static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
+ struct regulator_dev *rdev)
+{
+ int id = rdev_get_id(rdev);
+ int ret, reg, enable_ctrl;
+
+ if (id != S5M8767_BUCK9)
+ return -EINVAL;
+
+ ret = s5m8767_get_register(s5m8767, id, ®, &enable_ctrl);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ reg, S5M8767_ENCTRL_MASK,
+ S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
+}
+
+
+#ifdef CONFIG_OF
+static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
+ struct sec_platform_data *pdata,
+ struct device_node *pmic_np)
+{
+ int i, gpio;
+
+ for (i = 0; i < 3; i++) {
+ gpio = of_get_named_gpio(pmic_np,
+ "s5m8767,pmic-buck-dvs-gpios", i);
+ if (!gpio_is_valid(gpio)) {
+ dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
+ return -EINVAL;
+ }
+ pdata->buck_gpios[i] = gpio;
+ }
+ return 0;
+}
+
+static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
+ struct sec_platform_data *pdata,
+ struct device_node *pmic_np)
+{
+ int i, gpio;
+
+ for (i = 0; i < 3; i++) {
+ gpio = of_get_named_gpio(pmic_np,
+ "s5m8767,pmic-buck-ds-gpios", i);
+ if (!gpio_is_valid(gpio)) {
+ dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
+ return -EINVAL;
+ }
+ pdata->buck_ds[i] = gpio;
+ }
+ return 0;
+}
+
+static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct sec_platform_data *pdata)
+{
+ struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct device_node *pmic_np, *regulators_np, *reg_np;
+ struct sec_regulator_data *rdata;
+ struct sec_opmode_data *rmode;
+ unsigned int i, dvs_voltage_nr = 8, ret;
+
+ pmic_np = iodev->dev->of_node;
+ if (!pmic_np) {
+ dev_err(iodev->dev, "could not find pmic sub-node\n");
+ return -ENODEV;
+ }
+
+ regulators_np = of_get_child_by_name(pmic_np, "regulators");
+ if (!regulators_np) {
+ dev_err(iodev->dev, "could not find regulators sub-node\n");
+ return -EINVAL;
+ }
+
+ /* count the number of regulators to be supported in pmic */
+ pdata->num_regulators = of_get_child_count(regulators_np);
+
+ rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
+ pdata->num_regulators, GFP_KERNEL);
+ if (!rdata)
+ return -ENOMEM;
+
+ rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
+ pdata->num_regulators, GFP_KERNEL);
+ if (!rmode)
+ return -ENOMEM;
+
+ pdata->regulators = rdata;
+ pdata->opmode = rmode;
+ for_each_child_of_node(regulators_np, reg_np) {
+ for (i = 0; i < ARRAY_SIZE(regulators); i++)
+ if (!of_node_cmp(reg_np->name, regulators[i].name))
+ break;
+
+ if (i == ARRAY_SIZE(regulators)) {
+ dev_warn(iodev->dev,
+ "don't know how to configure regulator %s\n",
+ reg_np->name);
+ continue;
+ }
+
+ rdata->ext_control_gpio = of_get_named_gpio(reg_np,
+ "s5m8767,pmic-ext-control-gpios", 0);
+
+ rdata->id = i;
+ rdata->initdata = of_get_regulator_init_data(
+ &pdev->dev, reg_np,
+ ®ulators[i]);
+ rdata->reg_node = reg_np;
+ rdata++;
+ rmode->id = i;
+ if (of_property_read_u32(reg_np, "op_mode",
+ &rmode->mode)) {
+ dev_warn(iodev->dev,
+ "no op_mode property property at %s\n",
+ reg_np->full_name);
+
+ rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
+ }
+ rmode++;
+ }
+
+ of_node_put(regulators_np);
+
+ if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
+ pdata->buck2_gpiodvs = true;
+
+ if (of_property_read_u32_array(pmic_np,
+ "s5m8767,pmic-buck2-dvs-voltage",
+ pdata->buck2_voltage, dvs_voltage_nr)) {
+ dev_err(iodev->dev, "buck2 voltages not specified\n");
+ return -EINVAL;
+ }
+ }
+
+ if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
+ pdata->buck3_gpiodvs = true;
+
+ if (of_property_read_u32_array(pmic_np,
+ "s5m8767,pmic-buck3-dvs-voltage",
+ pdata->buck3_voltage, dvs_voltage_nr)) {
+ dev_err(iodev->dev, "buck3 voltages not specified\n");
+ return -EINVAL;
+ }
+ }
+
+ if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
+ pdata->buck4_gpiodvs = true;
+
+ if (of_property_read_u32_array(pmic_np,
+ "s5m8767,pmic-buck4-dvs-voltage",
+ pdata->buck4_voltage, dvs_voltage_nr)) {
+ dev_err(iodev->dev, "buck4 voltages not specified\n");
+ return -EINVAL;
+ }
+ }
+
+ if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
+ pdata->buck4_gpiodvs) {
+ ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
+ if (ret)
+ return -EINVAL;
+
+ if (of_property_read_u32(pmic_np,
+ "s5m8767,pmic-buck-default-dvs-idx",
+ &pdata->buck_default_idx)) {
+ pdata->buck_default_idx = 0;
+ } else {
+ if (pdata->buck_default_idx >= 8) {
+ pdata->buck_default_idx = 0;
+ dev_info(iodev->dev,
+ "invalid value for default dvs index, use 0\n");
+ }
+ }
+ }
+
+ ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
+ if (ret)
+ return -EINVAL;
+
+ if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
+ pdata->buck2_ramp_enable = true;
+
+ if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
+ pdata->buck3_ramp_enable = true;
+
+ if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
+ pdata->buck4_ramp_enable = true;
+
+ if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
+ || pdata->buck4_ramp_enable) {
+ if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
+ &pdata->buck_ramp_delay))
+ pdata->buck_ramp_delay = 0;
+ }
+
+ return 0;
+}
+#else
+static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct sec_platform_data *pdata)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
+static int s5m8767_pmic_probe(struct platform_device *pdev)
+{
+ struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct sec_platform_data *pdata = iodev->pdata;
+ struct regulator_config config = { };
+ struct s5m8767_info *s5m8767;
+ int i, ret, buck_init;
+
+ if (!pdata) {
+ dev_err(pdev->dev.parent, "Platform data not supplied\n");
+ return -ENODEV;
+ }
+
+ if (iodev->dev->of_node) {
+ ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
+ if (ret)
+ return ret;
+ }
+
+ if (pdata->buck2_gpiodvs) {
+ if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
+ dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
+ return -EINVAL;
+ }
+ }
+
+ if (pdata->buck3_gpiodvs) {
+ if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
+ dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
+ return -EINVAL;
+ }
+ }
+
+ if (pdata->buck4_gpiodvs) {
+ if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
+ dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
+ return -EINVAL;
+ }
+ }
+
+ s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
+ GFP_KERNEL);
+ if (!s5m8767)
+ return -ENOMEM;
+
+ s5m8767->dev = &pdev->dev;
+ s5m8767->iodev = iodev;
+ s5m8767->num_regulators = pdata->num_regulators;
+ platform_set_drvdata(pdev, s5m8767);
+
+ s5m8767->buck_gpioindex = pdata->buck_default_idx;
+ s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
+ s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
+ s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
+ s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
+ s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
+ s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
+ s5m8767->buck_ds[0] = pdata->buck_ds[0];
+ s5m8767->buck_ds[1] = pdata->buck_ds[1];
+ s5m8767->buck_ds[2] = pdata->buck_ds[2];
+
+ s5m8767->ramp_delay = pdata->buck_ramp_delay;
+ s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
+ s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
+ s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
+ s5m8767->opmode = pdata->opmode;
+
+ buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
+ pdata->buck2_init);
+
+ regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
+ buck_init);
+
+ buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
+ pdata->buck3_init);
+
+ regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
+ buck_init);
+
+ buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
+ pdata->buck4_init);
+
+ regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
+ buck_init);
+
+ for (i = 0; i < 8; i++) {
+ if (s5m8767->buck2_gpiodvs) {
+ s5m8767->buck2_vol[i] =
+ s5m8767_convert_voltage_to_sel(
+ &buck_voltage_val2,
+ pdata->buck2_voltage[i]);
+ }
+
+ if (s5m8767->buck3_gpiodvs) {
+ s5m8767->buck3_vol[i] =
+ s5m8767_convert_voltage_to_sel(
+ &buck_voltage_val2,
+ pdata->buck3_voltage[i]);
+ }
+
+ if (s5m8767->buck4_gpiodvs) {
+ s5m8767->buck4_vol[i] =
+ s5m8767_convert_voltage_to_sel(
+ &buck_voltage_val2,
+ pdata->buck4_voltage[i]);
+ }
+ }
+
+ if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
+ pdata->buck4_gpiodvs) {
+
+ if (!gpio_is_valid(pdata->buck_gpios[0]) ||
+ !gpio_is_valid(pdata->buck_gpios[1]) ||
+ !gpio_is_valid(pdata->buck_gpios[2])) {
+ dev_err(&pdev->dev, "GPIO NOT VALID\n");
+ return -EINVAL;
+ }
+
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
+ "S5M8767 SET1");
+ if (ret)
+ return ret;
+
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
+ "S5M8767 SET2");
+ if (ret)
+ return ret;
+
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
+ "S5M8767 SET3");
+ if (ret)
+ return ret;
+
+ /* SET1 GPIO */
+ gpio_direction_output(pdata->buck_gpios[0],
+ (s5m8767->buck_gpioindex >> 2) & 0x1);
+ /* SET2 GPIO */
+ gpio_direction_output(pdata->buck_gpios[1],
+ (s5m8767->buck_gpioindex >> 1) & 0x1);
+ /* SET3 GPIO */
+ gpio_direction_output(pdata->buck_gpios[2],
+ (s5m8767->buck_gpioindex >> 0) & 0x1);
+ }
+
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
+ if (ret)
+ return ret;
+
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
+ if (ret)
+ return ret;
+
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
+ if (ret)
+ return ret;
+
+ /* DS2 GPIO */
+ gpio_direction_output(pdata->buck_ds[0], 0x0);
+ /* DS3 GPIO */
+ gpio_direction_output(pdata->buck_ds[1], 0x0);
+ /* DS4 GPIO */
+ gpio_direction_output(pdata->buck_ds[2], 0x0);
+
+ if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
+ pdata->buck4_gpiodvs) {
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK2CTRL, 1 << 1,
+ (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK3CTRL, 1 << 1,
+ (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK4CTRL, 1 << 1,
+ (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
+ }
+
+ /* Initialize GPIO DVS registers */
+ for (i = 0; i < 8; i++) {
+ if (s5m8767->buck2_gpiodvs) {
+ regmap_write(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK2DVS1 + i,
+ s5m8767->buck2_vol[i]);
+ }
+
+ if (s5m8767->buck3_gpiodvs) {
+ regmap_write(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK3DVS1 + i,
+ s5m8767->buck3_vol[i]);
+ }
+
+ if (s5m8767->buck4_gpiodvs) {
+ regmap_write(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK4DVS1 + i,
+ s5m8767->buck4_vol[i]);
+ }
+ }
+
+ if (s5m8767->buck2_ramp)
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_DVSRAMP, 0x08, 0x08);
+
+ if (s5m8767->buck3_ramp)
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_DVSRAMP, 0x04, 0x04);
+
+ if (s5m8767->buck4_ramp)
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_DVSRAMP, 0x02, 0x02);
+
+ if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
+ || s5m8767->buck4_ramp) {
+ unsigned int val;
+ switch (s5m8767->ramp_delay) {
+ case 5:
+ val = S5M8767_DVS_BUCK_RAMP_5;
+ break;
+ case 10:
+ val = S5M8767_DVS_BUCK_RAMP_10;
+ break;
+ case 25:
+ val = S5M8767_DVS_BUCK_RAMP_25;
+ break;
+ case 50:
+ val = S5M8767_DVS_BUCK_RAMP_50;
+ break;
+ case 100:
+ val = S5M8767_DVS_BUCK_RAMP_100;
+ break;
+ default:
+ val = S5M8767_DVS_BUCK_RAMP_10;
+ }
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_DVSRAMP,
+ S5M8767_DVS_BUCK_RAMP_MASK,
+ val << S5M8767_DVS_BUCK_RAMP_SHIFT);
+ }
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ const struct sec_voltage_desc *desc;
+ int id = pdata->regulators[i].id;
+ int enable_reg, enable_val;
+ struct regulator_dev *rdev;
+
+ desc = reg_voltage_map[id];
+ if (desc) {
+ regulators[id].n_voltages =
+ (desc->max - desc->min) / desc->step + 1;
+ regulators[id].min_uV = desc->min;
+ regulators[id].uV_step = desc->step;
+ regulators[id].vsel_reg =
+ s5m8767_get_vsel_reg(id, s5m8767);
+ if (id < S5M8767_BUCK1)
+ regulators[id].vsel_mask = 0x3f;
+ else
+ regulators[id].vsel_mask = 0xff;
+
+ s5m8767_get_register(s5m8767, id, &enable_reg,
+ &enable_val);
+ regulators[id].enable_reg = enable_reg;
+ regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
+ regulators[id].enable_val = enable_val;
+ }
+
+ config.dev = s5m8767->dev;
+ config.init_data = pdata->regulators[i].initdata;
+ config.driver_data = s5m8767;
+ config.regmap = iodev->regmap_pmic;
+ config.of_node = pdata->regulators[i].reg_node;
+ config.ena_gpio = -EINVAL;
+ config.ena_gpio_flags = 0;
+ config.ena_gpio_initialized = true;
+ if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
+ s5m8767_regulator_config_ext_control(s5m8767,
+ &pdata->regulators[i], &config);
+
+ rdev = devm_regulator_register(&pdev->dev, ®ulators[id],
+ &config);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(s5m8767->dev, "regulator init failed for %d\n",
+ id);
+ return ret;
+ }
+
+ if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
+ ret = s5m8767_enable_ext_control(s5m8767, rdev);
+ if (ret < 0) {
+ dev_err(s5m8767->dev,
+ "failed to enable gpio control over %s: %d\n",
+ rdev->desc->name, ret);
+ return ret;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id s5m8767_pmic_id[] = {
+ { "s5m8767-pmic", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
+
+static struct platform_driver s5m8767_pmic_driver = {
+ .driver = {
+ .name = "s5m8767-pmic",
+ },
+ .probe = s5m8767_pmic_probe,
+ .id_table = s5m8767_pmic_id,
+};
+
+static int __init s5m8767_pmic_init(void)
+{
+ return platform_driver_register(&s5m8767_pmic_driver);
+}
+subsys_initcall(s5m8767_pmic_init);
+
+static void __exit s5m8767_pmic_exit(void)
+{
+ platform_driver_unregister(&s5m8767_pmic_driver);
+}
+module_exit(s5m8767_pmic_exit);
+
+/* Module information */
+MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff