Quelle  bd71828-regulator.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (C) 2019 ROHM Semiconductors
// bd71828-regulator.c ROHM BD71828GW-DS1 regulator driver
//

#include <linux/delay.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/rohm-bd71828.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>

struct reg_init {
 unsigned int reg;
 unsigned int mask;
 unsigned int val;
};
struct bd71828_regulator_data {
 struct regulator_desc desc;
 const struct rohm_dvs_config dvs;
 const struct reg_init *reg_inits;
 int reg_init_amnt;
};

static const struct reg_init buck1_inits[] = {
 /*
 * DVS Buck voltages can be changed by register values or via GPIO.
 * Use register accesses by default.
 */
 {
  .reg = BD71828_REG_PS_CTRL_1,
  .mask = BD71828_MASK_DVS_BUCK1_CTRL,
  .val = BD71828_DVS_BUCK1_CTRL_I2C,
 },
};

static const struct reg_init buck2_inits[] = {
 {
  .reg = BD71828_REG_PS_CTRL_1,
  .mask = BD71828_MASK_DVS_BUCK2_CTRL,
  .val = BD71828_DVS_BUCK2_CTRL_I2C,
 },
};

static const struct reg_init buck6_inits[] = {
 {
  .reg = BD71828_REG_PS_CTRL_1,
  .mask = BD71828_MASK_DVS_BUCK6_CTRL,
  .val = BD71828_DVS_BUCK6_CTRL_I2C,
 },
};

static const struct reg_init buck7_inits[] = {
 {
  .reg = BD71828_REG_PS_CTRL_1,
  .mask = BD71828_MASK_DVS_BUCK7_CTRL,
  .val = BD71828_DVS_BUCK7_CTRL_I2C,
 },
};

static const struct linear_range bd71828_buck1267_volts[] = {
 REGULATOR_LINEAR_RANGE(500000, 0x00, 0xef, 6250),
 REGULATOR_LINEAR_RANGE(2000000, 0xf0, 0xff, 0),
};

static const struct linear_range bd71828_buck3_volts[] = {
 REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x0f, 50000),
 REGULATOR_LINEAR_RANGE(2000000, 0x10, 0x1f, 0),
};

static const struct linear_range bd71828_buck4_volts[] = {
 REGULATOR_LINEAR_RANGE(1000000, 0x00, 0x1f, 25000),
 REGULATOR_LINEAR_RANGE(1800000, 0x20, 0x3f, 0),
};

static const struct linear_range bd71828_buck5_volts[] = {
 REGULATOR_LINEAR_RANGE(2500000, 0x00, 0x0f, 50000),
 REGULATOR_LINEAR_RANGE(3300000, 0x10, 0x1f, 0),
};

static const struct linear_range bd71828_ldo_volts[] = {
 REGULATOR_LINEAR_RANGE(800000, 0x00, 0x31, 50000),
 REGULATOR_LINEAR_RANGE(3300000, 0x32, 0x3f, 0),
};

static const unsigned int bd71828_ramp_delay[] = { 2500, 5000, 10000, 20000 };

static int buck_set_hw_dvs_levels(struct device_node *np,
      const struct regulator_desc *desc,
      struct regulator_config *cfg)
{
 struct bd71828_regulator_data *data;

 data = container_of(desc, struct bd71828_regulator_data, desc);

 return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
}

static int ldo6_parse_dt(struct device_node *np,
    const struct regulator_desc *desc,
    struct regulator_config *cfg)
{
 int ret, i;
 uint32_t uv = 0;
 unsigned int en;
 struct regmap *regmap = cfg->regmap;
 static const char * const props[] = { "rohm,dvs-run-voltage",
           "rohm,dvs-idle-voltage",
           "rohm,dvs-suspend-voltage",
           "rohm,dvs-lpsr-voltage" };
 unsigned int mask[] = { BD71828_MASK_RUN_EN, BD71828_MASK_IDLE_EN,
          BD71828_MASK_SUSP_EN, BD71828_MASK_LPSR_EN };

 for (i = 0; i < ARRAY_SIZE(props); i++) {
  ret = of_property_read_u32(np, props[i], &uv);
  if (ret) {
   if (ret != -EINVAL)
    return ret;
   continue;
  }
  if (uv)
   en = 0xffffffff;
  else
   en = 0;

  ret = regmap_update_bits(regmap, desc->enable_reg, mask[i], en);
  if (ret)
   return ret;
 }
 return 0;
}

static const struct regulator_ops bd71828_buck_ops = {
 .enable = regulator_enable_regmap,
 .disable = regulator_disable_regmap,
 .is_enabled = regulator_is_enabled_regmap,
 .list_voltage = regulator_list_voltage_linear_range,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
};

static const struct regulator_ops bd71828_dvs_buck_ops = {
 .enable = regulator_enable_regmap,
 .disable = regulator_disable_regmap,
 .is_enabled = regulator_is_enabled_regmap,
 .list_voltage = regulator_list_voltage_linear_range,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
 .set_voltage_time_sel = regulator_set_voltage_time_sel,
 .set_ramp_delay = regulator_set_ramp_delay_regmap,
};

static const struct regulator_ops bd71828_ldo_ops = {
 .enable = regulator_enable_regmap,
 .disable = regulator_disable_regmap,
 .is_enabled = regulator_is_enabled_regmap,
 .list_voltage = regulator_list_voltage_linear_range,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
};

static const struct regulator_ops bd71828_ldo6_ops = {
 .enable = regulator_enable_regmap,
 .disable = regulator_disable_regmap,
 .is_enabled = regulator_is_enabled_regmap,
};

static const struct bd71828_regulator_data bd71828_rdata[] = {
 {
  .desc = {
   .name = "buck1",
   .of_match = of_match_ptr("BUCK1"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK1,
   .ops = &bd71828_dvs_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck1267_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
   .n_voltages = BD71828_BUCK1267_VOLTS,
   .enable_reg = BD71828_REG_BUCK1_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK1_VOLT,
   .vsel_mask = BD71828_MASK_BUCK1267_VOLT,
   .ramp_delay_table = bd71828_ramp_delay,
   .n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
   .ramp_reg = BD71828_REG_BUCK1_MODE,
   .ramp_mask = BD71828_MASK_RAMP_DELAY,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK1_VOLT,
   .run_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_reg = BD71828_REG_BUCK1_IDLE_VOLT,
   .idle_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_reg = BD71828_REG_BUCK1_SUSP_VOLT,
   .suspend_mask = BD71828_MASK_BUCK1267_VOLT,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   /*
 * LPSR voltage is same as SUSPEND voltage. Allow
 * only enabling/disabling regulator for LPSR state
 */
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
  .reg_inits = buck1_inits,
  .reg_init_amnt = ARRAY_SIZE(buck1_inits),
 },
 {
  .desc = {
   .name = "buck2",
   .of_match = of_match_ptr("BUCK2"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK2,
   .ops = &bd71828_dvs_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck1267_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
   .n_voltages = BD71828_BUCK1267_VOLTS,
   .enable_reg = BD71828_REG_BUCK2_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK2_VOLT,
   .vsel_mask = BD71828_MASK_BUCK1267_VOLT,
   .ramp_delay_table = bd71828_ramp_delay,
   .n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
   .ramp_reg = BD71828_REG_BUCK2_MODE,
   .ramp_mask = BD71828_MASK_RAMP_DELAY,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK2_VOLT,
   .run_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_reg = BD71828_REG_BUCK2_IDLE_VOLT,
   .idle_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_reg = BD71828_REG_BUCK2_SUSP_VOLT,
   .suspend_mask = BD71828_MASK_BUCK1267_VOLT,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
   .lpsr_reg = BD71828_REG_BUCK2_SUSP_VOLT,
   .lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
  },
  .reg_inits = buck2_inits,
  .reg_init_amnt = ARRAY_SIZE(buck2_inits),
 },
 {
  .desc = {
   .name = "buck3",
   .of_match = of_match_ptr("BUCK3"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK3,
   .ops = &bd71828_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck3_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck3_volts),
   .n_voltages = BD71828_BUCK3_VOLTS,
   .enable_reg = BD71828_REG_BUCK3_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK3_VOLT,
   .vsel_mask = BD71828_MASK_BUCK3_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * BUCK3 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK3_VOLT,
   .run_mask = BD71828_MASK_BUCK3_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
 },
 {
  .desc = {
   .name = "buck4",
   .of_match = of_match_ptr("BUCK4"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK4,
   .ops = &bd71828_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck4_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck4_volts),
   .n_voltages = BD71828_BUCK4_VOLTS,
   .enable_reg = BD71828_REG_BUCK4_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK4_VOLT,
   .vsel_mask = BD71828_MASK_BUCK4_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * BUCK4 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK4_VOLT,
   .run_mask = BD71828_MASK_BUCK4_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
 },
 {
  .desc = {
   .name = "buck5",
   .of_match = of_match_ptr("BUCK5"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK5,
   .ops = &bd71828_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck5_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck5_volts),
   .n_voltages = BD71828_BUCK5_VOLTS,
   .enable_reg = BD71828_REG_BUCK5_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK5_VOLT,
   .vsel_mask = BD71828_MASK_BUCK5_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * BUCK5 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK5_VOLT,
   .run_mask = BD71828_MASK_BUCK5_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
 },
 {
  .desc = {
   .name = "buck6",
   .of_match = of_match_ptr("BUCK6"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK6,
   .ops = &bd71828_dvs_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck1267_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
   .n_voltages = BD71828_BUCK1267_VOLTS,
   .enable_reg = BD71828_REG_BUCK6_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK6_VOLT,
   .vsel_mask = BD71828_MASK_BUCK1267_VOLT,
   .ramp_delay_table = bd71828_ramp_delay,
   .n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
   .ramp_reg = BD71828_REG_BUCK6_MODE,
   .ramp_mask = BD71828_MASK_RAMP_DELAY,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK6_VOLT,
   .run_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_reg = BD71828_REG_BUCK6_IDLE_VOLT,
   .idle_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_reg = BD71828_REG_BUCK6_SUSP_VOLT,
   .suspend_mask = BD71828_MASK_BUCK1267_VOLT,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
   .lpsr_reg = BD71828_REG_BUCK6_SUSP_VOLT,
   .lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
  },
  .reg_inits = buck6_inits,
  .reg_init_amnt = ARRAY_SIZE(buck6_inits),
 },
 {
  .desc = {
   .name = "buck7",
   .of_match = of_match_ptr("BUCK7"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_BUCK7,
   .ops = &bd71828_dvs_buck_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_buck1267_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
   .n_voltages = BD71828_BUCK1267_VOLTS,
   .enable_reg = BD71828_REG_BUCK7_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_BUCK7_VOLT,
   .vsel_mask = BD71828_MASK_BUCK1267_VOLT,
   .ramp_delay_table = bd71828_ramp_delay,
   .n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
   .ramp_reg = BD71828_REG_BUCK7_MODE,
   .ramp_mask = BD71828_MASK_RAMP_DELAY,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_BUCK7_VOLT,
   .run_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_reg = BD71828_REG_BUCK7_IDLE_VOLT,
   .idle_mask = BD71828_MASK_BUCK1267_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_reg = BD71828_REG_BUCK7_SUSP_VOLT,
   .suspend_mask = BD71828_MASK_BUCK1267_VOLT,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
   .lpsr_reg = BD71828_REG_BUCK7_SUSP_VOLT,
   .lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
  },
  .reg_inits = buck7_inits,
  .reg_init_amnt = ARRAY_SIZE(buck7_inits),
 },
 {
  .desc = {
   .name = "ldo1",
   .of_match = of_match_ptr("LDO1"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO1,
   .ops = &bd71828_ldo_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_ldo_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
   .n_voltages = BD71828_LDO_VOLTS,
   .enable_reg = BD71828_REG_LDO1_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_LDO1_VOLT,
   .vsel_mask = BD71828_MASK_LDO_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * LDO1 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_LDO1_VOLT,
   .run_mask = BD71828_MASK_LDO_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
 }, {
  .desc = {
   .name = "ldo2",
   .of_match = of_match_ptr("LDO2"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO2,
   .ops = &bd71828_ldo_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_ldo_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
   .n_voltages = BD71828_LDO_VOLTS,
   .enable_reg = BD71828_REG_LDO2_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_LDO2_VOLT,
   .vsel_mask = BD71828_MASK_LDO_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * LDO2 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_LDO2_VOLT,
   .run_mask = BD71828_MASK_LDO_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
 }, {
  .desc = {
   .name = "ldo3",
   .of_match = of_match_ptr("LDO3"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO3,
   .ops = &bd71828_ldo_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_ldo_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
   .n_voltages = BD71828_LDO_VOLTS,
   .enable_reg = BD71828_REG_LDO3_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_LDO3_VOLT,
   .vsel_mask = BD71828_MASK_LDO_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * LDO3 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_LDO3_VOLT,
   .run_mask = BD71828_MASK_LDO_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },

 }, {
  .desc = {
   .name = "ldo4",
   .of_match = of_match_ptr("LDO4"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO4,
   .ops = &bd71828_ldo_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_ldo_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
   .n_voltages = BD71828_LDO_VOLTS,
   .enable_reg = BD71828_REG_LDO4_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_LDO4_VOLT,
   .vsel_mask = BD71828_MASK_LDO_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * LDO1 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_LDO4_VOLT,
   .run_mask = BD71828_MASK_LDO_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },
 }, {
  .desc = {
   .name = "ldo5",
   .of_match = of_match_ptr("LDO5"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO5,
   .ops = &bd71828_ldo_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_ldo_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
   .n_voltages = BD71828_LDO_VOLTS,
   .enable_reg = BD71828_REG_LDO5_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_LDO5_VOLT,
   .vsel_mask = BD71828_MASK_LDO_VOLT,
   .of_parse_cb = buck_set_hw_dvs_levels,
   .owner = THIS_MODULE,
  },
  /*
 * LDO5 is special. It can choose vsel settings to be configured
 * from 2 different registers (by GPIO).
 *
 * This driver supports only configuration where
 * BD71828_REG_LDO5_VOLT_L is used.
 */
  .dvs = {
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_LDO5_VOLT,
   .run_mask = BD71828_MASK_LDO_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },

 }, {
  .desc = {
   .name = "ldo6",
   .of_match = of_match_ptr("LDO6"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO6,
   .ops = &bd71828_ldo6_ops,
   .type = REGULATOR_VOLTAGE,
   .fixed_uV = BD71828_LDO_6_VOLTAGE,
   .n_voltages = 1,
   .enable_reg = BD71828_REG_LDO6_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .owner = THIS_MODULE,
   /*
 * LDO6 only supports enable/disable for all states.
 * Voltage for LDO6 is fixed.
 */
   .of_parse_cb = ldo6_parse_dt,
  },
 }, {
  .desc = {
   /* SNVS LDO in data-sheet */
   .name = "ldo7",
   .of_match = of_match_ptr("LDO7"),
   .regulators_node = of_match_ptr("regulators"),
   .id = BD71828_LDO_SNVS,
   .ops = &bd71828_ldo_ops,
   .type = REGULATOR_VOLTAGE,
   .linear_ranges = bd71828_ldo_volts,
   .n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
   .n_voltages = BD71828_LDO_VOLTS,
   .enable_reg = BD71828_REG_LDO7_EN,
   .enable_mask = BD71828_MASK_RUN_EN,
   .vsel_reg = BD71828_REG_LDO7_VOLT,
   .vsel_mask = BD71828_MASK_LDO_VOLT,
   .owner = THIS_MODULE,
   .of_parse_cb = buck_set_hw_dvs_levels,
  },
  .dvs = {
   /*
 * LDO7 only supports single voltage for all states.
 * voltage can be individually enabled for each state
 * though => allow setting all states to support
 * enabling power rail on different states.
 */
   .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
         ROHM_DVS_LEVEL_SUSPEND |
         ROHM_DVS_LEVEL_LPSR,
   .run_reg = BD71828_REG_LDO7_VOLT,
   .idle_reg = BD71828_REG_LDO7_VOLT,
   .suspend_reg = BD71828_REG_LDO7_VOLT,
   .lpsr_reg = BD71828_REG_LDO7_VOLT,
   .run_mask = BD71828_MASK_LDO_VOLT,
   .idle_on_mask = BD71828_MASK_IDLE_EN,
   .suspend_on_mask = BD71828_MASK_SUSP_EN,
   .lpsr_on_mask = BD71828_MASK_LPSR_EN,
  },

 },
};

static int bd71828_probe(struct platform_device *pdev)
{
 int i, j, ret;
 struct regulator_config config = {
  .dev = pdev->dev.parent,
 };

 config.regmap = dev_get_regmap(pdev->dev.parent, NULL);
 if (!config.regmap)
  return -ENODEV;

 for (i = 0; i < ARRAY_SIZE(bd71828_rdata); i++) {
  struct regulator_dev *rdev;
  const struct bd71828_regulator_data *rd;

  rd = &bd71828_rdata[i];
  rdev = devm_regulator_register(&pdev->dev,
            &rd->desc, &config);
  if (IS_ERR(rdev))
   return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
          "failed to register %s regulator\n",
          rd->desc.name);

  for (j = 0; j < rd->reg_init_amnt; j++) {
   ret = regmap_update_bits(config.regmap,
       rd->reg_inits[j].reg,
       rd->reg_inits[j].mask,
       rd->reg_inits[j].val);
   if (ret)
    return dev_err_probe(&pdev->dev, ret,
           "regulator %s init failed\n",
           rd->desc.name);
  }
 }
 return 0;
}

static struct platform_driver bd71828_regulator = {
 .driver = {
  .name = "bd71828-pmic",
  .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 },
 .probe = bd71828_probe,
};

module_platform_driver(bd71828_regulator);

MODULE_AUTHOR("Matti Vaittinen ");
MODULE_DESCRIPTION("BD71828 voltage regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bd71828-pmic");