Quelle  hi655x-regulator.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
//
// Device driver for regulators in Hi655x IC
//
// Copyright (c) 2016 HiSilicon Ltd.
//
// Authors:
// Chen Feng <puck.chen@hisilicon.com>
// Fei  Wang <w.f@huawei.com>

#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/io.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>
#include <linux/mfd/hi655x-pmic.h>

struct hi655x_regulator {
 unsigned int disable_reg;
 unsigned int status_reg;
 struct regulator_desc rdesc;
};

/* LDO7 & LDO10 */
static const unsigned int ldo7_voltages[] = {
 1800000, 1850000, 2850000, 2900000,
 3000000, 3100000, 3200000, 3300000,
};

static const unsigned int ldo19_voltages[] = {
 1800000, 1850000, 1900000, 1750000,
 2800000, 2850000, 2900000, 3000000,
};

static const unsigned int ldo22_voltages[] = {
  900000, 1000000, 1050000, 1100000,
 1150000, 1175000, 1185000, 1200000,
};

enum hi655x_regulator_id {
 HI655X_LDO0,
 HI655X_LDO1,
 HI655X_LDO2,
 HI655X_LDO3,
 HI655X_LDO4,
 HI655X_LDO5,
 HI655X_LDO6,
 HI655X_LDO7,
 HI655X_LDO8,
 HI655X_LDO9,
 HI655X_LDO10,
 HI655X_LDO11,
 HI655X_LDO12,
 HI655X_LDO13,
 HI655X_LDO14,
 HI655X_LDO15,
 HI655X_LDO16,
 HI655X_LDO17,
 HI655X_LDO18,
 HI655X_LDO19,
 HI655X_LDO20,
 HI655X_LDO21,
 HI655X_LDO22,
};

static int hi655x_is_enabled(struct regulator_dev *rdev)
{
 unsigned int value = 0;
 const struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);

 regmap_read(rdev->regmap, regulator->status_reg, &value);
 return (value & rdev->desc->enable_mask);
}

static int hi655x_disable(struct regulator_dev *rdev)
{
 const struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);

 return regmap_write(rdev->regmap, regulator->disable_reg,
       rdev->desc->enable_mask);
}

static const struct regulator_ops hi655x_regulator_ops = {
 .enable = regulator_enable_regmap,
 .disable = hi655x_disable,
 .is_enabled = hi655x_is_enabled,
 .list_voltage = regulator_list_voltage_table,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_ops hi655x_ldo_linear_ops = {
 .enable = regulator_enable_regmap,
 .disable = hi655x_disable,
 .is_enabled = hi655x_is_enabled,
 .list_voltage = regulator_list_voltage_linear,
 .get_voltage_sel = regulator_get_voltage_sel_regmap,
 .set_voltage_sel = regulator_set_voltage_sel_regmap,
};

#define HI655X_LDO(_ID, vreg, vmask, ereg, dreg,                 \
     sreg, cmask, vtable) {                        \
 .rdesc = {                                               \
  .name            = #_ID,                         \
  .of_match        = of_match_ptr(#_ID),           \
  .ops             = &hi655x_regulator_ops,        \
  .regulators_node = of_match_ptr("regulators"),   \
  .type            = REGULATOR_VOLTAGE,            \
  .id              = HI655X_##_ID,                 \
  .owner           = THIS_MODULE,                  \
  .n_voltages      = ARRAY_SIZE(vtable),           \
  .volt_table      = vtable,                       \
  .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
  .vsel_mask       = vmask,                        \
  .enable_reg      = HI655X_BUS_ADDR(ereg),        \
  .enable_mask     = BIT(cmask),                   \
 },                                                       \
 .disable_reg = HI655X_BUS_ADDR(dreg),                    \
 .status_reg = HI655X_BUS_ADDR(sreg),                     \
}

#define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg,          \
     sreg, cmask, minv, nvolt, vstep) {     \
 .rdesc = {                                               \
  .name            = #_ID,                         \
  .of_match        = of_match_ptr(#_ID),           \
  .ops             = &hi655x_ldo_linear_ops,       \
  .regulators_node = of_match_ptr("regulators"),   \
  .type            = REGULATOR_VOLTAGE,            \
  .id              = HI655X_##_ID,                 \
  .owner           = THIS_MODULE,                  \
  .min_uV          = minv,                         \
  .n_voltages      = nvolt,                        \
  .uV_step         = vstep,                        \
  .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
  .vsel_mask       = vmask,                        \
  .enable_reg      = HI655X_BUS_ADDR(ereg),        \
  .enable_mask     = BIT(cmask),                   \
 },                                                       \
 .disable_reg = HI655X_BUS_ADDR(dreg),                    \
 .status_reg = HI655X_BUS_ADDR(sreg),                     \
}

static const struct hi655x_regulator regulators[] = {
 HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
     2500000, 8, 100000),
 HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
 HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
 HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
     1600000, 8, 50000),
 HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
     2500000, 8, 100000),
 HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
     1600000, 8, 50000),
 HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
     2500000, 8, 100000),
 HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
 HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
     1650000, 8, 50000),
 HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
};

static int hi655x_regulator_probe(struct platform_device *pdev)
{
 unsigned int i;
 struct hi655x_pmic *pmic;
 struct regulator_config config = { };
 struct regulator_dev *rdev;

 pmic = dev_get_drvdata(pdev->dev.parent);
 if (!pmic) {
  dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
  return -ENODEV;
 }

 config.dev = pdev->dev.parent;
 config.regmap = pmic->regmap;
 for (i = 0; i < ARRAY_SIZE(regulators); i++) {
  config.driver_data = (void *) ®ulators[i];

  rdev = devm_regulator_register(&pdev->dev,
            ®ulators[i].rdesc,
            &config);
  if (IS_ERR(rdev)) {
   dev_err(&pdev->dev, "failed to register regulator %s\n",
    regulators[i].rdesc.name);
   return PTR_ERR(rdev);
  }
 }
 return 0;
}

static const struct platform_device_id hi655x_regulator_table[] = {
 { .name = "hi655x-regulator" },
 {},
};
MODULE_DEVICE_TABLE(platform, hi655x_regulator_table);

static struct platform_driver hi655x_regulator_driver = {
 .id_table = hi655x_regulator_table,
 .driver = {
  .name = "hi655x-regulator",
  .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 },
 .probe = hi655x_regulator_probe,
};
module_platform_driver(hi655x_regulator_driver);

MODULE_AUTHOR("Chen Feng ");
MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
MODULE_LICENSE("GPL v2");