diff options
Diffstat (limited to 'drivers/regulator/s2mps11.c')
| -rw-r--r-- | drivers/regulator/s2mps11.c | 770 |
1 files changed, 770 insertions, 0 deletions
diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c new file mode 100644 index 00000000000..02e2fb2fca6 --- /dev/null +++ b/drivers/regulator/s2mps11.c @@ -0,0 +1,770 @@ +/* + * s2mps11.c + * + * Copyright (c) 2012-2014 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#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/of_gpio.h> +#include <linux/mfd/samsung/core.h> +#include <linux/mfd/samsung/s2mps11.h> +#include <linux/mfd/samsung/s2mps14.h> + +struct s2mps11_info { + unsigned int rdev_num; + int ramp_delay2; + int ramp_delay34; + int ramp_delay5; + int ramp_delay16; + int ramp_delay7810; + int ramp_delay9; + /* + * One bit for each S2MPS14 regulator whether the suspend mode + * was enabled. + */ + unsigned int s2mps14_suspend_state:30; + /* Array of size rdev_num with GPIO-s for external sleep control */ + int *ext_control_gpio; +}; + +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 s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev, + unsigned int old_selector, + unsigned int new_selector) +{ + struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev); + unsigned int ramp_delay = 0; + int old_volt, new_volt; + + switch (rdev_get_id(rdev)) { + case S2MPS11_BUCK2: + ramp_delay = s2mps11->ramp_delay2; + break; + case S2MPS11_BUCK3: + case S2MPS11_BUCK4: + ramp_delay = s2mps11->ramp_delay34; + break; + case S2MPS11_BUCK5: + ramp_delay = s2mps11->ramp_delay5; + break; + case S2MPS11_BUCK6: + case S2MPS11_BUCK1: + ramp_delay = s2mps11->ramp_delay16; + break; + case S2MPS11_BUCK7: + case S2MPS11_BUCK8: + case S2MPS11_BUCK10: + ramp_delay = s2mps11->ramp_delay7810; + break; + case S2MPS11_BUCK9: + ramp_delay = s2mps11->ramp_delay9; + } + + 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 s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) +{ + struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev); + unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK; + unsigned int ramp_enable = 1, enable_shift = 0; + int ret; + + switch (rdev_get_id(rdev)) { + case S2MPS11_BUCK1: + if (ramp_delay > s2mps11->ramp_delay16) + s2mps11->ramp_delay16 = ramp_delay; + else + ramp_delay = s2mps11->ramp_delay16; + + ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT; + break; + case S2MPS11_BUCK2: + enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT; + if (!ramp_delay) { + ramp_enable = 0; + break; + } + + s2mps11->ramp_delay2 = ramp_delay; + ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT; + ramp_reg = S2MPS11_REG_RAMP; + break; + case S2MPS11_BUCK3: + enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT; + if (!ramp_delay) { + ramp_enable = 0; + break; + } + + if (ramp_delay > s2mps11->ramp_delay34) + s2mps11->ramp_delay34 = ramp_delay; + else + ramp_delay = s2mps11->ramp_delay34; + + ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT; + ramp_reg = S2MPS11_REG_RAMP; + break; + case S2MPS11_BUCK4: + enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT; + if (!ramp_delay) { + ramp_enable = 0; + break; + } + + if (ramp_delay > s2mps11->ramp_delay34) + s2mps11->ramp_delay34 = ramp_delay; + else + ramp_delay = s2mps11->ramp_delay34; + + ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT; + ramp_reg = S2MPS11_REG_RAMP; + break; + case S2MPS11_BUCK5: + s2mps11->ramp_delay5 = ramp_delay; + ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT; + break; + case S2MPS11_BUCK6: + enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT; + if (!ramp_delay) { + ramp_enable = 0; + break; + } + + if (ramp_delay > s2mps11->ramp_delay16) + s2mps11->ramp_delay16 = ramp_delay; + else + ramp_delay = s2mps11->ramp_delay16; + + ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT; + break; + case S2MPS11_BUCK7: + case S2MPS11_BUCK8: + case S2MPS11_BUCK10: + if (ramp_delay > s2mps11->ramp_delay7810) + s2mps11->ramp_delay7810 = ramp_delay; + else + ramp_delay = s2mps11->ramp_delay7810; + + ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT; + break; + case S2MPS11_BUCK9: + s2mps11->ramp_delay9 = ramp_delay; + ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT; + break; + default: + return 0; + } + + if (!ramp_enable) + goto ramp_disable; + + /* Ramp delay can be enabled/disabled only for buck[2346] */ + if ((rdev_get_id(rdev) >= S2MPS11_BUCK2 && + rdev_get_id(rdev) <= S2MPS11_BUCK4) || + rdev_get_id(rdev) == S2MPS11_BUCK6) { + ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP, + 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, S2MPS11_REG_RAMP, + 1 << enable_shift, 0); +} + +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 = s2mps11_regulator_set_voltage_time_sel, + .set_ramp_delay = s2mps11_set_ramp_delay, +}; + +#define regulator_desc_s2mps11_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_s2mps11_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_s2mps11_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, \ + .ramp_delay = S2MPS11_RAMP_DELAY, \ + .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_s2mps11_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, \ + .ramp_delay = S2MPS11_RAMP_DELAY, \ + .vsel_reg = S2MPS11_REG_B5CTRL2, \ + .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ + .enable_reg = S2MPS11_REG_B5CTRL1, \ + .enable_mask = S2MPS11_ENABLE_MASK \ +} + +#define regulator_desc_s2mps11_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, \ + .ramp_delay = S2MPS11_RAMP_DELAY, \ + .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_s2mps11_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, \ + .ramp_delay = S2MPS11_RAMP_DELAY, \ + .vsel_reg = S2MPS11_REG_B9CTRL2, \ + .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ + .enable_reg = S2MPS11_REG_B9CTRL1, \ + .enable_mask = S2MPS11_ENABLE_MASK \ +} + +#define regulator_desc_s2mps11_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, \ + .ramp_delay = S2MPS11_RAMP_DELAY, \ + .vsel_reg = S2MPS11_REG_B10CTRL2, \ + .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \ + .enable_reg = S2MPS11_REG_B10CTRL1, \ + .enable_mask = S2MPS11_ENABLE_MASK \ +} + +static const struct regulator_desc s2mps11_regulators[] = { + regulator_desc_s2mps11_ldo2(1), + regulator_desc_s2mps11_ldo1(2), + regulator_desc_s2mps11_ldo1(3), + regulator_desc_s2mps11_ldo1(4), + regulator_desc_s2mps11_ldo1(5), + regulator_desc_s2mps11_ldo2(6), + regulator_desc_s2mps11_ldo1(7), + regulator_desc_s2mps11_ldo1(8), + regulator_desc_s2mps11_ldo1(9), + regulator_desc_s2mps11_ldo1(10), + regulator_desc_s2mps11_ldo2(11), + regulator_desc_s2mps11_ldo1(12), + regulator_desc_s2mps11_ldo1(13), + regulator_desc_s2mps11_ldo1(14), + regulator_desc_s2mps11_ldo1(15), + regulator_desc_s2mps11_ldo1(16), + regulator_desc_s2mps11_ldo1(17), + regulator_desc_s2mps11_ldo1(18), + regulator_desc_s2mps11_ldo1(19), + regulator_desc_s2mps11_ldo1(20), + regulator_desc_s2mps11_ldo1(21), + regulator_desc_s2mps11_ldo2(22), + regulator_desc_s2mps11_ldo2(23), + regulator_desc_s2mps11_ldo1(24), + regulator_desc_s2mps11_ldo1(25), + regulator_desc_s2mps11_ldo1(26), + regulator_desc_s2mps11_ldo2(27), + regulator_desc_s2mps11_ldo1(28), + regulator_desc_s2mps11_ldo1(29), + regulator_desc_s2mps11_ldo1(30), + regulator_desc_s2mps11_ldo1(31), + regulator_desc_s2mps11_ldo1(32), + regulator_desc_s2mps11_ldo1(33), + regulator_desc_s2mps11_ldo1(34), + regulator_desc_s2mps11_ldo1(35), + regulator_desc_s2mps11_ldo1(36), + regulator_desc_s2mps11_ldo1(37), + regulator_desc_s2mps11_ldo1(38), + regulator_desc_s2mps11_buck1_4(1), + regulator_desc_s2mps11_buck1_4(2), + regulator_desc_s2mps11_buck1_4(3), + regulator_desc_s2mps11_buck1_4(4), + regulator_desc_s2mps11_buck5, + regulator_desc_s2mps11_buck6_8(6), + regulator_desc_s2mps11_buck6_8(7), + regulator_desc_s2mps11_buck6_8(8), + regulator_desc_s2mps11_buck9, + regulator_desc_s2mps11_buck10, +}; + +static int s2mps14_regulator_enable(struct regulator_dev *rdev) +{ + struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev); + unsigned int val; + + if (s2mps11->s2mps14_suspend_state & (1 << rdev_get_id(rdev))) + val = S2MPS14_ENABLE_SUSPEND; + else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)])) + val = S2MPS14_ENABLE_EXT_CONTROL; + else + val = rdev->desc->enable_mask; + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val); +} + +static int s2mps14_regulator_set_suspend_disable(struct regulator_dev *rdev) +{ + int ret; + unsigned int val; + struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev); + + /* LDO3 should be always on and does not support suspend mode */ + if (rdev_get_id(rdev) == S2MPS14_LDO3) + return 0; + + ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val); + if (ret < 0) + return ret; + + s2mps11->s2mps14_suspend_state |= (1 << rdev_get_id(rdev)); + /* + * Don't enable suspend mode if regulator is already disabled because + * this would effectively for a short time turn on the regulator after + * resuming. + * However we still want to toggle the suspend_state bit for regulator + * in case if it got enabled before suspending the system. + */ + if (!(val & rdev->desc->enable_mask)) + return 0; + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, S2MPS14_ENABLE_SUSPEND); +} + +static struct regulator_ops s2mps14_reg_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = s2mps14_regulator_enable, + .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, + .set_suspend_disable = s2mps14_regulator_set_suspend_disable, +}; + +#define regulator_desc_s2mps14_ldo1(num) { \ + .name = "LDO"#num, \ + .id = S2MPS14_LDO##num, \ + .ops = &s2mps14_reg_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = S2MPS14_LDO_MIN_800MV, \ + .uV_step = S2MPS14_LDO_STEP_25MV, \ + .n_voltages = S2MPS14_LDO_N_VOLTAGES, \ + .vsel_reg = S2MPS14_REG_L1CTRL + num - 1, \ + .vsel_mask = S2MPS14_LDO_VSEL_MASK, \ + .enable_reg = S2MPS14_REG_L1CTRL + num - 1, \ + .enable_mask = S2MPS14_ENABLE_MASK \ +} +#define regulator_desc_s2mps14_ldo2(num) { \ + .name = "LDO"#num, \ + .id = S2MPS14_LDO##num, \ + .ops = &s2mps14_reg_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = S2MPS14_LDO_MIN_1800MV, \ + .uV_step = S2MPS14_LDO_STEP_25MV, \ + .n_voltages = S2MPS14_LDO_N_VOLTAGES, \ + .vsel_reg = S2MPS14_REG_L1CTRL + num - 1, \ + .vsel_mask = S2MPS14_LDO_VSEL_MASK, \ + .enable_reg = S2MPS14_REG_L1CTRL + num - 1, \ + .enable_mask = S2MPS14_ENABLE_MASK \ +} +#define regulator_desc_s2mps14_ldo3(num) { \ + .name = "LDO"#num, \ + .id = S2MPS14_LDO##num, \ + .ops = &s2mps14_reg_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = S2MPS14_LDO_MIN_800MV, \ + .uV_step = S2MPS14_LDO_STEP_12_5MV, \ + .n_voltages = S2MPS14_LDO_N_VOLTAGES, \ + .vsel_reg = S2MPS14_REG_L1CTRL + num - 1, \ + .vsel_mask = S2MPS14_LDO_VSEL_MASK, \ + .enable_reg = S2MPS14_REG_L1CTRL + num - 1, \ + .enable_mask = S2MPS14_ENABLE_MASK \ +} +#define regulator_desc_s2mps14_buck1235(num) { \ + .name = "BUCK"#num, \ + .id = S2MPS14_BUCK##num, \ + .ops = &s2mps14_reg_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = S2MPS14_BUCK1235_MIN_600MV, \ + .uV_step = S2MPS14_BUCK1235_STEP_6_25MV, \ + .n_voltages = S2MPS14_BUCK_N_VOLTAGES, \ + .linear_min_sel = S2MPS14_BUCK1235_START_SEL, \ + .ramp_delay = S2MPS14_BUCK_RAMP_DELAY, \ + .vsel_reg = S2MPS14_REG_B1CTRL2 + (num - 1) * 2, \ + .vsel_mask = S2MPS14_BUCK_VSEL_MASK, \ + .enable_reg = S2MPS14_REG_B1CTRL1 + (num - 1) * 2, \ + .enable_mask = S2MPS14_ENABLE_MASK \ +} +#define regulator_desc_s2mps14_buck4(num) { \ + .name = "BUCK"#num, \ + .id = S2MPS14_BUCK##num, \ + .ops = &s2mps14_reg_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = S2MPS14_BUCK4_MIN_1400MV, \ + .uV_step = S2MPS14_BUCK4_STEP_12_5MV, \ + .n_voltages = S2MPS14_BUCK_N_VOLTAGES, \ + .linear_min_sel = S2MPS14_BUCK4_START_SEL, \ + .ramp_delay = S2MPS14_BUCK_RAMP_DELAY, \ + .vsel_reg = S2MPS14_REG_B1CTRL2 + (num - 1) * 2, \ + .vsel_mask = S2MPS14_BUCK_VSEL_MASK, \ + .enable_reg = S2MPS14_REG_B1CTRL1 + (num - 1) * 2, \ + .enable_mask = S2MPS14_ENABLE_MASK \ +} + +static const struct regulator_desc s2mps14_regulators[] = { + regulator_desc_s2mps14_ldo3(1), + regulator_desc_s2mps14_ldo3(2), + regulator_desc_s2mps14_ldo1(3), + regulator_desc_s2mps14_ldo1(4), + regulator_desc_s2mps14_ldo3(5), + regulator_desc_s2mps14_ldo3(6), + regulator_desc_s2mps14_ldo1(7), + regulator_desc_s2mps14_ldo2(8), + regulator_desc_s2mps14_ldo3(9), + regulator_desc_s2mps14_ldo3(10), + regulator_desc_s2mps14_ldo1(11), + regulator_desc_s2mps14_ldo2(12), + regulator_desc_s2mps14_ldo2(13), + regulator_desc_s2mps14_ldo2(14), + regulator_desc_s2mps14_ldo2(15), + regulator_desc_s2mps14_ldo2(16), + regulator_desc_s2mps14_ldo2(17), + regulator_desc_s2mps14_ldo2(18), + regulator_desc_s2mps14_ldo1(19), + regulator_desc_s2mps14_ldo1(20), + regulator_desc_s2mps14_ldo1(21), + regulator_desc_s2mps14_ldo3(22), + regulator_desc_s2mps14_ldo1(23), + regulator_desc_s2mps14_ldo2(24), + regulator_desc_s2mps14_ldo2(25), + regulator_desc_s2mps14_buck1235(1), + regulator_desc_s2mps14_buck1235(2), + regulator_desc_s2mps14_buck1235(3), + regulator_desc_s2mps14_buck4(4), + regulator_desc_s2mps14_buck1235(5), +}; + +static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11, + struct regulator_dev *rdev) +{ + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, S2MPS14_ENABLE_EXT_CONTROL); +} + +static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev, + struct of_regulator_match *rdata, struct s2mps11_info *s2mps11) +{ + int *gpio = s2mps11->ext_control_gpio; + unsigned int i; + unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11, + S2MPS14_LDO12 }; + + for (i = 0; i < ARRAY_SIZE(valid_regulators); i++) { + unsigned int reg = valid_regulators[i]; + + if (!rdata[reg].init_data || !rdata[reg].of_node) + continue; + + gpio[reg] = of_get_named_gpio(rdata[reg].of_node, + "samsung,ext-control-gpios", 0); + if (gpio_is_valid(gpio[reg])) + dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n", + gpio[reg], reg, rdata[reg].name); + } +} + +static int s2mps11_pmic_dt_parse(struct platform_device *pdev, + struct of_regulator_match *rdata, struct s2mps11_info *s2mps11, + enum sec_device_type dev_type) +{ + struct device_node *reg_np; + + reg_np = of_get_child_by_name(pdev->dev.parent->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, s2mps11->rdev_num); + if (dev_type == S2MPS14X) + s2mps14_pmic_dt_parse_ext_control_gpio(pdev, rdata, s2mps11); + + of_node_put(reg_np); + + return 0; +} + +static int s2mps11_pmic_probe(struct platform_device *pdev) +{ + struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct sec_platform_data *pdata = NULL; + struct of_regulator_match *rdata = NULL; + struct regulator_config config = { }; + struct s2mps11_info *s2mps11; + int i, ret = 0; + const struct regulator_desc *regulators; + enum sec_device_type dev_type; + + s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info), + GFP_KERNEL); + if (!s2mps11) + return -ENOMEM; + + dev_type = platform_get_device_id(pdev)->driver_data; + switch (dev_type) { + case S2MPS11X: + s2mps11->rdev_num = ARRAY_SIZE(s2mps11_regulators); + regulators = s2mps11_regulators; + break; + case S2MPS14X: + s2mps11->rdev_num = ARRAY_SIZE(s2mps14_regulators); + regulators = s2mps14_regulators; + break; + default: + dev_err(&pdev->dev, "Invalid device type: %u\n", dev_type); + return -EINVAL; + }; + + s2mps11->ext_control_gpio = devm_kzalloc(&pdev->dev, + sizeof(*s2mps11->ext_control_gpio) * s2mps11->rdev_num, + GFP_KERNEL); + if (!s2mps11->ext_control_gpio) + return -ENOMEM; + /* + * 0 is a valid GPIO so initialize all GPIO-s to negative value + * to indicate that external control won't be used for this regulator. + */ + for (i = 0; i < s2mps11->rdev_num; i++) + s2mps11->ext_control_gpio[i] = -EINVAL; + + if (!iodev->dev->of_node) { + if (iodev->pdata) { + pdata = iodev->pdata; + goto common_reg; + } else { + dev_err(pdev->dev.parent, + "Platform data or DT node not supplied\n"); + return -ENODEV; + } + } + + rdata = kzalloc(sizeof(*rdata) * s2mps11->rdev_num, GFP_KERNEL); + if (!rdata) + return -ENOMEM; + + for (i = 0; i < s2mps11->rdev_num; i++) + rdata[i].name = regulators[i].name; + + ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11, dev_type); + if (ret) + goto out; + +common_reg: + platform_set_drvdata(pdev, s2mps11); + + config.dev = &pdev->dev; + config.regmap = iodev->regmap_pmic; + config.driver_data = s2mps11; + config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH; + for (i = 0; i < s2mps11->rdev_num; i++) { + struct regulator_dev *regulator; + + if (pdata) { + config.init_data = pdata->regulators[i].initdata; + config.of_node = pdata->regulators[i].reg_node; + } else { + config.init_data = rdata[i].init_data; + config.of_node = rdata[i].of_node; + } + config.ena_gpio = s2mps11->ext_control_gpio[i]; + + regulator = devm_regulator_register(&pdev->dev, + ®ulators[i], &config); + if (IS_ERR(regulator)) { + ret = PTR_ERR(regulator); + dev_err(&pdev->dev, "regulator init failed for %d\n", + i); + goto out; + } + + if (gpio_is_valid(s2mps11->ext_control_gpio[i])) { + ret = s2mps14_pmic_enable_ext_control(s2mps11, + regulator); + if (ret < 0) { + dev_err(&pdev->dev, + "failed to enable GPIO control over %s: %d\n", + regulator->desc->name, ret); + goto out; + } + } + } + +out: + kfree(rdata); + + return ret; +} + +static const struct platform_device_id s2mps11_pmic_id[] = { + { "s2mps11-pmic", S2MPS11X}, + { "s2mps14-pmic", S2MPS14X}, + { }, +}; +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, + .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/S2MPS14 Regulator Driver"); +MODULE_LICENSE("GPL"); |