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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/regulator/lm363x-regulator.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
 * TI LM363X Regulator Driver
 *
 * Copyright 2015 Texas Instruments
 *
 * Author: Milo Kim <milo.kim@ti.com>
 */
 
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/mfd/ti-lmu.h>
#include <linux/mfd/ti-lmu-register.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
 
/* LM3631 */
#define LM3631_BOOST_VSEL_MAX		0x25
#define LM3631_LDO_VSEL_MAX		0x28
#define LM3631_CONT_VSEL_MAX		0x03
#define LM3631_VBOOST_MIN		4500000
#define LM3631_VCONT_MIN		1800000
#define LM3631_VLDO_MIN			4000000
#define ENABLE_TIME_USEC		1000
 
/* LM3632 */
#define LM3632_BOOST_VSEL_MAX		0x26
#define LM3632_LDO_VSEL_MAX		0x28
#define LM3632_VBOOST_MIN		4500000
#define LM3632_VLDO_MIN			4000000
 
/* LM36274 */
#define LM36274_BOOST_VSEL_MAX		0x3f
#define LM36274_LDO_VSEL_MAX		0x32
#define LM36274_VOLTAGE_MIN		4000000
 
/* Common */
#define LM363X_STEP_50mV		50000
#define LM363X_STEP_500mV		500000
 
static const int ldo_cont_enable_time[] = {
<------>0, 2000, 5000, 10000, 20000, 50000, 100000, 200000,
};
 
static int lm363x_regulator_enable_time(struct regulator_dev *rdev)
{
<------>enum lm363x_regulator_id id = rdev_get_id(rdev);
<------>unsigned int val, addr, mask;
 
<------>switch (id) {
<------>case LM3631_LDO_CONT:
<------><------>addr = LM3631_REG_ENTIME_VCONT;
<------><------>mask = LM3631_ENTIME_CONT_MASK;
<------><------>break;
<------>case LM3631_LDO_OREF:
<------><------>addr = LM3631_REG_ENTIME_VOREF;
<------><------>mask = LM3631_ENTIME_MASK;
<------><------>break;
<------>case LM3631_LDO_POS:
<------><------>addr = LM3631_REG_ENTIME_VPOS;
<------><------>mask = LM3631_ENTIME_MASK;
<------><------>break;
<------>case LM3631_LDO_NEG:
<------><------>addr = LM3631_REG_ENTIME_VNEG;
<------><------>mask = LM3631_ENTIME_MASK;
<------><------>break;
<------>default:
<------><------>return 0;
<------>}
 
<------>if (regmap_read(rdev->regmap, addr, &val))
<------><------>return -EINVAL;
 
<------>val = (val & mask) >> LM3631_ENTIME_SHIFT;
 
<------>if (id == LM3631_LDO_CONT)
<------><------>return ldo_cont_enable_time[val];
<------>else
<------><------>return ENABLE_TIME_USEC * val;
}
 
static const struct regulator_ops lm363x_boost_voltage_table_ops = {
<------>.list_voltage     = regulator_list_voltage_linear,
<------>.set_voltage_sel  = regulator_set_voltage_sel_regmap,
<------>.get_voltage_sel  = regulator_get_voltage_sel_regmap,
};
 
static const struct regulator_ops lm363x_regulator_voltage_table_ops = {
<------>.list_voltage     = regulator_list_voltage_linear,
<------>.set_voltage_sel  = regulator_set_voltage_sel_regmap,
<------>.get_voltage_sel  = regulator_get_voltage_sel_regmap,
<------>.enable           = regulator_enable_regmap,
<------>.disable          = regulator_disable_regmap,
<------>.is_enabled       = regulator_is_enabled_regmap,
<------>.enable_time      = lm363x_regulator_enable_time,
};
 
static const struct regulator_desc lm363x_regulator_desc[] = {
<------>/* LM3631 */
<------>{
<------><------>.name           = "vboost",
<------><------>.of_match	= "vboost",
<------><------>.id             = LM3631_BOOST,
<------><------>.ops            = &lm363x_boost_voltage_table_ops,
<------><------>.n_voltages     = LM3631_BOOST_VSEL_MAX + 1,
<------><------>.min_uV         = LM3631_VBOOST_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3631_REG_VOUT_BOOST,
<------><------>.vsel_mask      = LM3631_VOUT_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_cont",
<------><------>.of_match	= "vcont",
<------><------>.id             = LM3631_LDO_CONT,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM3631_CONT_VSEL_MAX + 1,
<------><------>.min_uV         = LM3631_VCONT_MIN,
<------><------>.uV_step        = LM363X_STEP_500mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3631_REG_VOUT_CONT,
<------><------>.vsel_mask      = LM3631_VOUT_CONT_MASK,
<------><------>.enable_reg     = LM3631_REG_LDO_CTRL2,
<------><------>.enable_mask    = LM3631_EN_CONT_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_oref",
<------><------>.of_match	= "voref",
<------><------>.id             = LM3631_LDO_OREF,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM3631_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM3631_VLDO_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3631_REG_VOUT_OREF,
<------><------>.vsel_mask      = LM3631_VOUT_MASK,
<------><------>.enable_reg     = LM3631_REG_LDO_CTRL1,
<------><------>.enable_mask    = LM3631_EN_OREF_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_vpos",
<------><------>.of_match	= "vpos",
<------><------>.id             = LM3631_LDO_POS,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM3631_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM3631_VLDO_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3631_REG_VOUT_POS,
<------><------>.vsel_mask      = LM3631_VOUT_MASK,
<------><------>.enable_reg     = LM3631_REG_LDO_CTRL1,
<------><------>.enable_mask    = LM3631_EN_VPOS_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_vneg",
<------><------>.of_match	= "vneg",
<------><------>.id             = LM3631_LDO_NEG,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM3631_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM3631_VLDO_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3631_REG_VOUT_NEG,
<------><------>.vsel_mask      = LM3631_VOUT_MASK,
<------><------>.enable_reg     = LM3631_REG_LDO_CTRL1,
<------><------>.enable_mask    = LM3631_EN_VNEG_MASK,
<------>},
<------>/* LM3632 */
<------>{
<------><------>.name           = "vboost",
<------><------>.of_match	= "vboost",
<------><------>.id             = LM3632_BOOST,
<------><------>.ops            = &lm363x_boost_voltage_table_ops,
<------><------>.n_voltages     = LM3632_BOOST_VSEL_MAX + 1,
<------><------>.min_uV         = LM3632_VBOOST_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3632_REG_VOUT_BOOST,
<------><------>.vsel_mask      = LM3632_VOUT_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_vpos",
<------><------>.of_match	= "vpos",
<------><------>.id             = LM3632_LDO_POS,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM3632_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM3632_VLDO_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3632_REG_VOUT_POS,
<------><------>.vsel_mask      = LM3632_VOUT_MASK,
<------><------>.enable_reg     = LM3632_REG_BIAS_CONFIG,
<------><------>.enable_mask    = LM3632_EN_VPOS_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_vneg",
<------><------>.of_match	= "vneg",
<------><------>.id             = LM3632_LDO_NEG,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM3632_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM3632_VLDO_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM3632_REG_VOUT_NEG,
<------><------>.vsel_mask      = LM3632_VOUT_MASK,
<------><------>.enable_reg     = LM3632_REG_BIAS_CONFIG,
<------><------>.enable_mask    = LM3632_EN_VNEG_MASK,
<------>},
 
<------>/* LM36274 */
<------>{
<------><------>.name           = "vboost",
<------><------>.of_match	= "vboost",
<------><------>.id             = LM36274_BOOST,
<------><------>.ops            = &lm363x_boost_voltage_table_ops,
<------><------>.n_voltages     = LM36274_BOOST_VSEL_MAX + 1,
<------><------>.min_uV         = LM36274_VOLTAGE_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM36274_REG_VOUT_BOOST,
<------><------>.vsel_mask      = LM36274_VOUT_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_vpos",
<------><------>.of_match	= "vpos",
<------><------>.id             = LM36274_LDO_POS,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM36274_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM36274_VOLTAGE_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM36274_REG_VOUT_POS,
<------><------>.vsel_mask      = LM36274_VOUT_MASK,
<------><------>.enable_reg     = LM36274_REG_BIAS_CONFIG_1,
<------><------>.enable_mask    = LM36274_EN_VPOS_MASK,
<------>},
<------>{
<------><------>.name           = "ldo_vneg",
<------><------>.of_match	= "vneg",
<------><------>.id             = LM36274_LDO_NEG,
<------><------>.ops            = &lm363x_regulator_voltage_table_ops,
<------><------>.n_voltages     = LM36274_LDO_VSEL_MAX + 1,
<------><------>.min_uV         = LM36274_VOLTAGE_MIN,
<------><------>.uV_step        = LM363X_STEP_50mV,
<------><------>.type           = REGULATOR_VOLTAGE,
<------><------>.owner          = THIS_MODULE,
<------><------>.vsel_reg       = LM36274_REG_VOUT_NEG,
<------><------>.vsel_mask      = LM36274_VOUT_MASK,
<------><------>.enable_reg     = LM36274_REG_BIAS_CONFIG_1,
<------><------>.enable_mask    = LM36274_EN_VNEG_MASK,
<------>},
};
 
static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
{
<------>/*
<------> * Check LCM_EN1/2_GPIO is configured.
<------> * Those pins are used for enabling VPOS/VNEG LDOs.
<------> * Do not use devm* here: the regulator core takes over the
<------> * lifecycle management of the GPIO descriptor.
<------> */
<------>switch (id) {
<------>case LM3632_LDO_POS:
<------>case LM36274_LDO_POS:
<------><------>return gpiod_get_index_optional(dev, "enable", 0,
<------><------><------><------>GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
<------>case LM3632_LDO_NEG:
<------>case LM36274_LDO_NEG:
<------><------>return gpiod_get_index_optional(dev, "enable", 1,
<------><------><------><------>GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
<------>default:
<------><------>return NULL;
<------>}
}
 
static int lm363x_regulator_set_ext_en(struct regmap *regmap, int id)
{
<------>int ext_en_mask = 0;
 
<------>switch (id) {
<------>case LM3632_LDO_POS:
<------>case LM3632_LDO_NEG:
<------><------>ext_en_mask = LM3632_EXT_EN_MASK;
<------><------>break;
<------>case LM36274_LDO_POS:
<------>case LM36274_LDO_NEG:
<------><------>ext_en_mask = LM36274_EXT_EN_MASK;
<------><------>break;
<------>default:
<------><------>return -ENODEV;
<------>}
 
<------>return regmap_update_bits(regmap, lm363x_regulator_desc[id].enable_reg,
<------><------><------><------> ext_en_mask, ext_en_mask);
}
 
static int lm363x_regulator_probe(struct platform_device *pdev)
{
<------>struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
<------>struct regmap *regmap = lmu->regmap;
<------>struct regulator_config cfg = { };
<------>struct regulator_dev *rdev;
<------>struct device *dev = &pdev->dev;
<------>int id = pdev->id;
<------>struct gpio_desc *gpiod;
<------>int ret;
 
<------>cfg.dev = dev;
<------>cfg.regmap = regmap;
 
<------>/*
<------> * LM3632 LDOs can be controlled by external pin.
<------> * Register update is required if the pin is used.
<------> */
<------>gpiod = lm363x_regulator_of_get_enable_gpio(dev, id);
<------>if (IS_ERR(gpiod))
<------><------>return PTR_ERR(gpiod);
 
<------>if (gpiod) {
<------><------>cfg.ena_gpiod = gpiod;
<------><------>ret = lm363x_regulator_set_ext_en(regmap, id);
<------><------>if (ret) {
<------><------><------>gpiod_put(gpiod);
<------><------><------>dev_err(dev, "External pin err: %d\n", ret);
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>rdev = devm_regulator_register(dev, &lm363x_regulator_desc[id], &cfg);
<------>if (IS_ERR(rdev)) {
<------><------>ret = PTR_ERR(rdev);
<------><------>dev_err(dev, "[%d] regulator register err: %d\n", id, ret);
<------><------>return ret;
<------>}
 
<------>return 0;
}
 
static struct platform_driver lm363x_regulator_driver = {
<------>.probe = lm363x_regulator_probe,
<------>.driver = {
<------><------>.name = "lm363x-regulator",
<------>},
};
 
module_platform_driver(lm363x_regulator_driver);
 
MODULE_DESCRIPTION("TI LM363X Regulator Driver");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:lm363x-regulator");
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