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path: root/drivers/regulator/max77620-regulator.c
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-rw-r--r--drivers/regulator/max77620-regulator.c813
1 files changed, 813 insertions, 0 deletions
diff --git a/drivers/regulator/max77620-regulator.c b/drivers/regulator/max77620-regulator.c
new file mode 100644
index 000000000000..73a3356a5c19
--- /dev/null
+++ b/drivers/regulator/max77620-regulator.c
@@ -0,0 +1,813 @@
+/*
+ * Maxim MAX77620 Regulator driver
+ *
+ * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
+ * Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#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 {
+ struct regulator_init_data *reg_idata;
+ 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;
+};
+
+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;
+
+ 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 (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_init_pmic(struct max77620_regulator *pmic, int id)
+{
+ struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
+ int ret;
+
+ /* 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;
+
+ 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 = 1;
+
+ 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_info *rinfo = pmic->rinfo[id];
+ int ret, val;
+ u8 mask;
+
+ if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
+ if (ramp_delay <= 13750)
+ val = 0;
+ else if (ramp_delay <= 27500)
+ val = 1;
+ else if (ramp_delay <= 55000)
+ val = 2;
+ else
+ val = 3;
+ val <<= MAX77620_SD_SR_SHIFT;
+ mask = MAX77620_SD_SR_MASK;
+ } else {
+ if (ramp_delay <= 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, "Reg 0x%02x update failed: %d\n",
+ rinfo->cfg_addr, ret);
+
+ return ret;
+}
+
+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;
+
+ return max77620_init_pmic(pmic, desc->id);
+}
+
+static 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, \
+ }, \
+ }
+
+#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, \
+ }, \
+ }
+
+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_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 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 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;
+ default:
+ rinfo = max20024_regs_info;
+ break;
+ }
+
+ config.regmap = pmic->rmap;
+ config.dev = dev;
+ config.driver_data = pmic;
+
+ 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] = &max77620_regs_info[id];
+ pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
+
+ ret = max77620_read_slew_rate(pmic, id);
+ if (ret < 0)
+ return ret;
+
+ rdev = devm_regulator_register(dev, rdesc, &config);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(dev, "Regulator registration %s failed: %d\n",
+ rdesc->name, ret);
+ return ret;
+ }
+ }
+
+ 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_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", },
+ {},
+};
+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",
+ .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");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.