diff options
Diffstat (limited to 'drivers/regulator/max77620-regulator.c')
| -rw-r--r-- | drivers/regulator/max77620-regulator.c | 929 |
1 files changed, 929 insertions, 0 deletions
diff --git a/drivers/regulator/max77620-regulator.c b/drivers/regulator/max77620-regulator.c new file mode 100644 index 0000000000..7bc87d8e9f --- /dev/null +++ b/drivers/regulator/max77620-regulator.c @@ -0,0 +1,929 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Maxim MAX77620 Regulator driver + * + * Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved. + * + * Author: Mallikarjun Kasoju <mkasoju@nvidia.com> + * Laxman Dewangan <ldewangan@nvidia.com> + */ + +#include <linux/init.h> +#include <linux/mfd/max77620.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> + +#define max77620_rails(_name) "max77620-"#_name + +/* Power Mode */ +#define MAX77620_POWER_MODE_NORMAL 3 +#define MAX77620_POWER_MODE_LPM 2 +#define MAX77620_POWER_MODE_GLPM 1 +#define MAX77620_POWER_MODE_DISABLE 0 + +/* SD Slew Rate */ +#define MAX77620_SD_SR_13_75 0 +#define MAX77620_SD_SR_27_5 1 +#define MAX77620_SD_SR_55 2 +#define MAX77620_SD_SR_100 3 + +enum max77620_regulators { + MAX77620_REGULATOR_ID_SD0, + MAX77620_REGULATOR_ID_SD1, + MAX77620_REGULATOR_ID_SD2, + MAX77620_REGULATOR_ID_SD3, + MAX77620_REGULATOR_ID_SD4, + MAX77620_REGULATOR_ID_LDO0, + MAX77620_REGULATOR_ID_LDO1, + MAX77620_REGULATOR_ID_LDO2, + MAX77620_REGULATOR_ID_LDO3, + MAX77620_REGULATOR_ID_LDO4, + MAX77620_REGULATOR_ID_LDO5, + MAX77620_REGULATOR_ID_LDO6, + MAX77620_REGULATOR_ID_LDO7, + MAX77620_REGULATOR_ID_LDO8, + MAX77620_NUM_REGS, +}; + +/* Regulator types */ +enum max77620_regulator_type { + MAX77620_REGULATOR_TYPE_SD, + MAX77620_REGULATOR_TYPE_LDO_N, + MAX77620_REGULATOR_TYPE_LDO_P, +}; + +struct max77620_regulator_info { + u8 type; + u8 fps_addr; + u8 volt_addr; + u8 cfg_addr; + u8 power_mode_mask; + u8 power_mode_shift; + u8 remote_sense_addr; + u8 remote_sense_mask; + struct regulator_desc desc; +}; + +struct max77620_regulator_pdata { + int active_fps_src; + int active_fps_pd_slot; + int active_fps_pu_slot; + int suspend_fps_src; + int suspend_fps_pd_slot; + int suspend_fps_pu_slot; + int current_mode; + int power_ok; + int ramp_rate_setting; +}; + +struct max77620_regulator { + struct device *dev; + struct regmap *rmap; + struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS]; + struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS]; + int enable_power_mode[MAX77620_NUM_REGS]; + int current_power_mode[MAX77620_NUM_REGS]; + int active_fps_src[MAX77620_NUM_REGS]; +}; + +#define fps_src_name(fps_src) \ + (fps_src == MAX77620_FPS_SRC_0 ? "FPS_SRC_0" : \ + fps_src == MAX77620_FPS_SRC_1 ? "FPS_SRC_1" : \ + fps_src == MAX77620_FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE") + +static int max77620_regulator_get_fps_src(struct max77620_regulator *pmic, + int id) +{ + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + unsigned int val; + int ret; + + ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x read failed %d\n", + rinfo->fps_addr, ret); + return ret; + } + + return (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT; +} + +static int max77620_regulator_set_fps_src(struct max77620_regulator *pmic, + int fps_src, int id) +{ + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + unsigned int val; + int ret; + + if (!rinfo) + return 0; + + switch (fps_src) { + case MAX77620_FPS_SRC_0: + case MAX77620_FPS_SRC_1: + case MAX77620_FPS_SRC_2: + case MAX77620_FPS_SRC_NONE: + break; + + case MAX77620_FPS_SRC_DEF: + ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x read failed %d\n", + rinfo->fps_addr, ret); + return ret; + } + ret = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT; + pmic->active_fps_src[id] = ret; + return 0; + + default: + dev_err(pmic->dev, "Invalid FPS %d for regulator %d\n", + fps_src, id); + return -EINVAL; + } + + ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr, + MAX77620_FPS_SRC_MASK, + fps_src << MAX77620_FPS_SRC_SHIFT); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x update failed %d\n", + rinfo->fps_addr, ret); + return ret; + } + pmic->active_fps_src[id] = fps_src; + + return 0; +} + +static int max77620_regulator_set_fps_slots(struct max77620_regulator *pmic, + int id, bool is_suspend) +{ + struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id]; + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + unsigned int val = 0; + unsigned int mask = 0; + int pu = rpdata->active_fps_pu_slot; + int pd = rpdata->active_fps_pd_slot; + int ret = 0; + + if (!rinfo) + return 0; + + if (is_suspend) { + pu = rpdata->suspend_fps_pu_slot; + pd = rpdata->suspend_fps_pd_slot; + } + + /* FPS power up period setting */ + if (pu >= 0) { + val |= (pu << MAX77620_FPS_PU_PERIOD_SHIFT); + mask |= MAX77620_FPS_PU_PERIOD_MASK; + } + + /* FPS power down period setting */ + if (pd >= 0) { + val |= (pd << MAX77620_FPS_PD_PERIOD_SHIFT); + mask |= MAX77620_FPS_PD_PERIOD_MASK; + } + + if (mask) { + ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr, + mask, val); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n", + rinfo->fps_addr, ret); + return ret; + } + } + + return ret; +} + +static int max77620_regulator_set_power_mode(struct max77620_regulator *pmic, + int power_mode, int id) +{ + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + u8 mask = rinfo->power_mode_mask; + u8 shift = rinfo->power_mode_shift; + u8 addr; + int ret; + + switch (rinfo->type) { + case MAX77620_REGULATOR_TYPE_SD: + addr = rinfo->cfg_addr; + break; + default: + addr = rinfo->volt_addr; + break; + } + + ret = regmap_update_bits(pmic->rmap, addr, mask, power_mode << shift); + if (ret < 0) { + dev_err(pmic->dev, "Regulator %d mode set failed: %d\n", + id, ret); + return ret; + } + pmic->current_power_mode[id] = power_mode; + + return ret; +} + +static int max77620_regulator_get_power_mode(struct max77620_regulator *pmic, + int id) +{ + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + unsigned int val, addr; + u8 mask = rinfo->power_mode_mask; + u8 shift = rinfo->power_mode_shift; + int ret; + + switch (rinfo->type) { + case MAX77620_REGULATOR_TYPE_SD: + addr = rinfo->cfg_addr; + break; + default: + addr = rinfo->volt_addr; + break; + } + + ret = regmap_read(pmic->rmap, addr, &val); + if (ret < 0) { + dev_err(pmic->dev, "Regulator %d: Reg 0x%02x read failed: %d\n", + id, addr, ret); + return ret; + } + + return (val & mask) >> shift; +} + +static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id) +{ + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + unsigned int rval; + int slew_rate; + int ret; + + ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &rval); + if (ret < 0) { + dev_err(pmic->dev, "Register 0x%02x read failed: %d\n", + rinfo->cfg_addr, ret); + return ret; + } + + switch (rinfo->type) { + case MAX77620_REGULATOR_TYPE_SD: + slew_rate = (rval >> MAX77620_SD_SR_SHIFT) & 0x3; + switch (slew_rate) { + case 0: + slew_rate = 13750; + break; + case 1: + slew_rate = 27500; + break; + case 2: + slew_rate = 55000; + break; + case 3: + slew_rate = 100000; + break; + } + rinfo->desc.ramp_delay = slew_rate; + break; + default: + slew_rate = rval & 0x1; + switch (slew_rate) { + case 0: + slew_rate = 100000; + break; + case 1: + slew_rate = 5000; + break; + } + rinfo->desc.ramp_delay = slew_rate; + break; + } + + return 0; +} + +static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id, + int slew_rate) +{ + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + unsigned int val; + int ret; + u8 mask; + + if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) { + if (slew_rate <= 13750) + val = 0; + else if (slew_rate <= 27500) + val = 1; + else if (slew_rate <= 55000) + val = 2; + else + val = 3; + val <<= MAX77620_SD_SR_SHIFT; + mask = MAX77620_SD_SR_MASK; + } else { + if (slew_rate <= 5000) + val = 1; + else + val = 0; + mask = MAX77620_LDO_SLEW_RATE_MASK; + } + + ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val); + if (ret < 0) { + dev_err(pmic->dev, "Regulator %d slew rate set failed: %d\n", + id, ret); + return ret; + } + + return 0; +} + +static int max77620_config_power_ok(struct max77620_regulator *pmic, int id) +{ + struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id]; + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + struct max77620_chip *chip = dev_get_drvdata(pmic->dev->parent); + u8 val, mask; + int ret; + + switch (chip->chip_id) { + case MAX20024: + if (rpdata->power_ok >= 0) { + if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) + mask = MAX20024_SD_CFG1_MPOK_MASK; + else + mask = MAX20024_LDO_CFG2_MPOK_MASK; + + val = rpdata->power_ok ? mask : 0; + + ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, + mask, val); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x update failed %d\n", + rinfo->cfg_addr, ret); + return ret; + } + } + break; + + default: + break; + } + + return 0; +} + +static int max77620_init_pmic(struct max77620_regulator *pmic, int id) +{ + struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id]; + int ret; + + max77620_config_power_ok(pmic, id); + + /* Update power mode */ + ret = max77620_regulator_get_power_mode(pmic, id); + if (ret < 0) + return ret; + + pmic->current_power_mode[id] = ret; + pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL; + + if (rpdata->active_fps_src == MAX77620_FPS_SRC_DEF) { + ret = max77620_regulator_get_fps_src(pmic, id); + if (ret < 0) + return ret; + rpdata->active_fps_src = ret; + } + + /* If rails are externally control of FPS then enable it always. */ + if (rpdata->active_fps_src == MAX77620_FPS_SRC_NONE) { + ret = max77620_regulator_set_power_mode(pmic, + pmic->enable_power_mode[id], id); + if (ret < 0) + return ret; + } else { + if (pmic->current_power_mode[id] != + pmic->enable_power_mode[id]) { + ret = max77620_regulator_set_power_mode(pmic, + pmic->enable_power_mode[id], id); + if (ret < 0) + return ret; + } + } + + ret = max77620_regulator_set_fps_src(pmic, rpdata->active_fps_src, id); + if (ret < 0) + return ret; + + ret = max77620_regulator_set_fps_slots(pmic, id, false); + if (ret < 0) + return ret; + + if (rpdata->ramp_rate_setting) { + ret = max77620_set_slew_rate(pmic, id, + rpdata->ramp_rate_setting); + if (ret < 0) + return ret; + } + + return 0; +} + +static int max77620_regulator_enable(struct regulator_dev *rdev) +{ + struct max77620_regulator *pmic = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + + if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE) + return 0; + + return max77620_regulator_set_power_mode(pmic, + pmic->enable_power_mode[id], id); +} + +static int max77620_regulator_disable(struct regulator_dev *rdev) +{ + struct max77620_regulator *pmic = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + + if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE) + return 0; + + return max77620_regulator_set_power_mode(pmic, + MAX77620_POWER_MODE_DISABLE, id); +} + +static int max77620_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct max77620_regulator *pmic = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + int ret; + + if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE) + return 1; + + ret = max77620_regulator_get_power_mode(pmic, id); + if (ret < 0) + return ret; + + if (ret != MAX77620_POWER_MODE_DISABLE) + return 1; + + return 0; +} + +static int max77620_regulator_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct max77620_regulator *pmic = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id]; + bool fpwm = false; + int power_mode; + int ret; + u8 val; + + switch (mode) { + case REGULATOR_MODE_FAST: + fpwm = true; + power_mode = MAX77620_POWER_MODE_NORMAL; + break; + + case REGULATOR_MODE_NORMAL: + power_mode = MAX77620_POWER_MODE_NORMAL; + break; + + case REGULATOR_MODE_IDLE: + power_mode = MAX77620_POWER_MODE_LPM; + break; + + default: + dev_err(pmic->dev, "Regulator %d mode %d is invalid\n", + id, mode); + return -EINVAL; + } + + if (rinfo->type != MAX77620_REGULATOR_TYPE_SD) + goto skip_fpwm; + + val = (fpwm) ? MAX77620_SD_FPWM_MASK : 0; + ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, + MAX77620_SD_FPWM_MASK, val); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n", + rinfo->cfg_addr, ret); + return ret; + } + rpdata->current_mode = mode; + +skip_fpwm: + ret = max77620_regulator_set_power_mode(pmic, power_mode, id); + if (ret < 0) + return ret; + + pmic->enable_power_mode[id] = power_mode; + + return 0; +} + +static unsigned int max77620_regulator_get_mode(struct regulator_dev *rdev) +{ + struct max77620_regulator *pmic = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + struct max77620_regulator_info *rinfo = pmic->rinfo[id]; + int fpwm = 0; + int ret; + int pm_mode, reg_mode; + unsigned int val; + + ret = max77620_regulator_get_power_mode(pmic, id); + if (ret < 0) + return 0; + + pm_mode = ret; + + if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) { + ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &val); + if (ret < 0) { + dev_err(pmic->dev, "Reg 0x%02x read failed: %d\n", + rinfo->cfg_addr, ret); + return ret; + } + fpwm = !!(val & MAX77620_SD_FPWM_MASK); + } + + switch (pm_mode) { + case MAX77620_POWER_MODE_NORMAL: + case MAX77620_POWER_MODE_DISABLE: + if (fpwm) + reg_mode = REGULATOR_MODE_FAST; + else + reg_mode = REGULATOR_MODE_NORMAL; + break; + case MAX77620_POWER_MODE_LPM: + case MAX77620_POWER_MODE_GLPM: + reg_mode = REGULATOR_MODE_IDLE; + break; + default: + return 0; + } + + return reg_mode; +} + +static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev, + int ramp_delay) +{ + struct max77620_regulator *pmic = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id]; + + /* Device specific ramp rate setting tells that platform has + * different ramp rate from advertised value. In this case, + * do not configure anything and just return success. + */ + if (rpdata->ramp_rate_setting) + return 0; + + return max77620_set_slew_rate(pmic, id, ramp_delay); +} + +static int max77620_of_parse_cb(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *config) +{ + struct max77620_regulator *pmic = config->driver_data; + struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[desc->id]; + u32 pval; + int ret; + + ret = of_property_read_u32(np, "maxim,active-fps-source", &pval); + rpdata->active_fps_src = (!ret) ? pval : MAX77620_FPS_SRC_DEF; + + ret = of_property_read_u32(np, "maxim,active-fps-power-up-slot", &pval); + rpdata->active_fps_pu_slot = (!ret) ? pval : -1; + + ret = of_property_read_u32( + np, "maxim,active-fps-power-down-slot", &pval); + rpdata->active_fps_pd_slot = (!ret) ? pval : -1; + + ret = of_property_read_u32(np, "maxim,suspend-fps-source", &pval); + rpdata->suspend_fps_src = (!ret) ? pval : -1; + + ret = of_property_read_u32( + np, "maxim,suspend-fps-power-up-slot", &pval); + rpdata->suspend_fps_pu_slot = (!ret) ? pval : -1; + + ret = of_property_read_u32( + np, "maxim,suspend-fps-power-down-slot", &pval); + rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1; + + ret = of_property_read_u32(np, "maxim,power-ok-control", &pval); + if (!ret) + rpdata->power_ok = pval; + else + rpdata->power_ok = -1; + + ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval); + rpdata->ramp_rate_setting = (!ret) ? pval : 0; + + return max77620_init_pmic(pmic, desc->id); +} + +static const struct regulator_ops max77620_regulator_ops = { + .is_enabled = max77620_regulator_is_enabled, + .enable = max77620_regulator_enable, + .disable = max77620_regulator_disable, + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_mode = max77620_regulator_set_mode, + .get_mode = max77620_regulator_get_mode, + .set_ramp_delay = max77620_regulator_set_ramp_delay, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_active_discharge = regulator_set_active_discharge_regmap, +}; + +#define MAX77620_SD_CNF2_ROVS_EN_NONE 0 +#define RAIL_SD(_id, _name, _sname, _volt_mask, _min_uV, _max_uV, \ + _step_uV, _rs_add, _rs_mask) \ + [MAX77620_REGULATOR_ID_##_id] = { \ + .type = MAX77620_REGULATOR_TYPE_SD, \ + .volt_addr = MAX77620_REG_##_id, \ + .cfg_addr = MAX77620_REG_##_id##_CFG, \ + .fps_addr = MAX77620_REG_FPS_##_id, \ + .remote_sense_addr = _rs_add, \ + .remote_sense_mask = MAX77620_SD_CNF2_ROVS_EN_##_rs_mask, \ + .power_mode_mask = MAX77620_SD_POWER_MODE_MASK, \ + .power_mode_shift = MAX77620_SD_POWER_MODE_SHIFT, \ + .desc = { \ + .name = max77620_rails(_name), \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .of_parse_cb = max77620_of_parse_cb, \ + .supply_name = _sname, \ + .id = MAX77620_REGULATOR_ID_##_id, \ + .ops = &max77620_regulator_ops, \ + .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \ + .min_uV = _min_uV, \ + .uV_step = _step_uV, \ + .enable_time = 500, \ + .vsel_mask = MAX77620_##_volt_mask##_VOLT_MASK, \ + .vsel_reg = MAX77620_REG_##_id, \ + .active_discharge_off = 0, \ + .active_discharge_on = MAX77620_SD_CFG1_ADE_ENABLE, \ + .active_discharge_mask = MAX77620_SD_CFG1_ADE_MASK, \ + .active_discharge_reg = MAX77620_REG_##_id##_CFG, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +#define RAIL_LDO(_id, _name, _sname, _type, _min_uV, _max_uV, _step_uV) \ + [MAX77620_REGULATOR_ID_##_id] = { \ + .type = MAX77620_REGULATOR_TYPE_LDO_##_type, \ + .volt_addr = MAX77620_REG_##_id##_CFG, \ + .cfg_addr = MAX77620_REG_##_id##_CFG2, \ + .fps_addr = MAX77620_REG_FPS_##_id, \ + .remote_sense_addr = 0xFF, \ + .power_mode_mask = MAX77620_LDO_POWER_MODE_MASK, \ + .power_mode_shift = MAX77620_LDO_POWER_MODE_SHIFT, \ + .desc = { \ + .name = max77620_rails(_name), \ + .of_match = of_match_ptr(#_name), \ + .regulators_node = of_match_ptr("regulators"), \ + .of_parse_cb = max77620_of_parse_cb, \ + .supply_name = _sname, \ + .id = MAX77620_REGULATOR_ID_##_id, \ + .ops = &max77620_regulator_ops, \ + .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \ + .min_uV = _min_uV, \ + .uV_step = _step_uV, \ + .enable_time = 500, \ + .vsel_mask = MAX77620_LDO_VOLT_MASK, \ + .vsel_reg = MAX77620_REG_##_id##_CFG, \ + .active_discharge_off = 0, \ + .active_discharge_on = MAX77620_LDO_CFG2_ADE_ENABLE, \ + .active_discharge_mask = MAX77620_LDO_CFG2_ADE_MASK, \ + .active_discharge_reg = MAX77620_REG_##_id##_CFG2, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + }, \ + } + +static struct max77620_regulator_info max77620_regs_info[MAX77620_NUM_REGS] = { + RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 1400000, 12500, 0x22, SD0), + RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 1550000, 12500, 0x22, SD1), + RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE), + RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE), + + RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000), + RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000), + RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000), + RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000), + RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500), + RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000), + RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000), + RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000), + RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000), +}; + +static struct max77620_regulator_info max20024_regs_info[MAX77620_NUM_REGS] = { + RAIL_SD(SD0, sd0, "in-sd0", SD0, 800000, 1587500, 12500, 0x22, SD0), + RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 3387500, 12500, 0x22, SD1), + RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE), + RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE), + RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE), + + RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000), + RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000), + RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000), + RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000), + RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500), + RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000), + RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000), + RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000), + RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000), +}; + +static struct max77620_regulator_info max77663_regs_info[MAX77620_NUM_REGS] = { + RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 3387500, 12500, 0xFF, NONE), + RAIL_SD(SD1, sd1, "in-sd1", SD1, 800000, 1587500, 12500, 0xFF, NONE), + RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE), + RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE), + RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE), + + RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000), + RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000), + RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000), + RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000), + RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500), + RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000), + RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000), + RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000), + RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000), +}; + +static int max77620_regulator_probe(struct platform_device *pdev) +{ + struct max77620_chip *max77620_chip = dev_get_drvdata(pdev->dev.parent); + struct max77620_regulator_info *rinfo; + struct device *dev = &pdev->dev; + struct regulator_config config = { }; + struct max77620_regulator *pmic; + int ret = 0; + int id; + + pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); + if (!pmic) + return -ENOMEM; + + platform_set_drvdata(pdev, pmic); + pmic->dev = dev; + pmic->rmap = max77620_chip->rmap; + if (!dev->of_node) + dev->of_node = pdev->dev.parent->of_node; + + switch (max77620_chip->chip_id) { + case MAX77620: + rinfo = max77620_regs_info; + break; + case MAX20024: + rinfo = max20024_regs_info; + break; + case MAX77663: + rinfo = max77663_regs_info; + break; + default: + return -EINVAL; + } + + config.regmap = pmic->rmap; + config.dev = dev; + config.driver_data = pmic; + + /* + * Set of_node_reuse flag to prevent driver core from attempting to + * claim any pinmux resources already claimed by the parent device. + * Otherwise PMIC driver will fail to re-probe. + */ + device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent); + + for (id = 0; id < MAX77620_NUM_REGS; id++) { + struct regulator_dev *rdev; + struct regulator_desc *rdesc; + + if ((max77620_chip->chip_id == MAX77620) && + (id == MAX77620_REGULATOR_ID_SD4)) + continue; + + rdesc = &rinfo[id].desc; + pmic->rinfo[id] = &rinfo[id]; + pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL; + pmic->reg_pdata[id].active_fps_src = -1; + pmic->reg_pdata[id].active_fps_pd_slot = -1; + pmic->reg_pdata[id].active_fps_pu_slot = -1; + pmic->reg_pdata[id].suspend_fps_src = -1; + pmic->reg_pdata[id].suspend_fps_pd_slot = -1; + pmic->reg_pdata[id].suspend_fps_pu_slot = -1; + pmic->reg_pdata[id].power_ok = -1; + pmic->reg_pdata[id].ramp_rate_setting = -1; + + ret = max77620_read_slew_rate(pmic, id); + if (ret < 0) + return ret; + + rdev = devm_regulator_register(dev, rdesc, &config); + if (IS_ERR(rdev)) + return dev_err_probe(dev, PTR_ERR(rdev), + "Regulator registration %s failed\n", + rdesc->name); + } + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int max77620_regulator_suspend(struct device *dev) +{ + struct max77620_regulator *pmic = dev_get_drvdata(dev); + struct max77620_regulator_pdata *reg_pdata; + int id; + + for (id = 0; id < MAX77620_NUM_REGS; id++) { + reg_pdata = &pmic->reg_pdata[id]; + + max77620_regulator_set_fps_slots(pmic, id, true); + if (reg_pdata->suspend_fps_src < 0) + continue; + + max77620_regulator_set_fps_src(pmic, reg_pdata->suspend_fps_src, + id); + } + + return 0; +} + +static int max77620_regulator_resume(struct device *dev) +{ + struct max77620_regulator *pmic = dev_get_drvdata(dev); + struct max77620_regulator_pdata *reg_pdata; + int id; + + for (id = 0; id < MAX77620_NUM_REGS; id++) { + reg_pdata = &pmic->reg_pdata[id]; + + max77620_config_power_ok(pmic, id); + + max77620_regulator_set_fps_slots(pmic, id, false); + if (reg_pdata->active_fps_src < 0) + continue; + max77620_regulator_set_fps_src(pmic, reg_pdata->active_fps_src, + id); + } + + return 0; +} +#endif + +static const struct dev_pm_ops max77620_regulator_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(max77620_regulator_suspend, + max77620_regulator_resume) +}; + +static const struct platform_device_id max77620_regulator_devtype[] = { + { .name = "max77620-pmic", }, + { .name = "max20024-pmic", }, + { .name = "max77663-pmic", }, + {}, +}; +MODULE_DEVICE_TABLE(platform, max77620_regulator_devtype); + +static struct platform_driver max77620_regulator_driver = { + .probe = max77620_regulator_probe, + .id_table = max77620_regulator_devtype, + .driver = { + .name = "max77620-pmic", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .pm = &max77620_regulator_pm_ops, + }, +}; + +module_platform_driver(max77620_regulator_driver); + +MODULE_DESCRIPTION("MAX77620/MAX20024 regulator driver"); +MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL v2"); |