Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0+
//
// wm8994-regulator.c  --  Regulator driver for the WM8994
//
// Copyright 2009 Wolfson Microelectronics PLC.
//
// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
 
#include <linux/mfd/wm8994/core.h>
#include <linux/mfd/wm8994/registers.h>
#include <linux/mfd/wm8994/pdata.h>
 
struct wm8994_ldo {
<------>struct regulator_dev *regulator;
<------>struct wm8994 *wm8994;
<------>struct regulator_consumer_supply supply;
<------>struct regulator_init_data init_data;
};
 
#define WM8994_LDO1_MAX_SELECTOR 0x7
#define WM8994_LDO2_MAX_SELECTOR 0x3
 
static const struct regulator_ops wm8994_ldo1_ops = {
<------>.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,
};
 
static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
<------><------><------><------>    unsigned int selector)
{
<------>struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);
 
<------>if (selector > WM8994_LDO2_MAX_SELECTOR)
<------><------>return -EINVAL;
 
<------>switch (ldo->wm8994->type) {
<------>case WM8994:
<------><------>return (selector * 100000) + 900000;
<------>case WM8958:
<------><------>return (selector * 100000) + 1000000;
<------>case WM1811:
<------><------>switch (selector) {
<------><------>case 0:
<------><------><------>return -EINVAL;
<------><------>default:
<------><------><------>return (selector * 100000) + 950000;
<------><------>}
<------><------>break;
<------>default:
<------><------>return -EINVAL;
<------>}
}
 
static const struct regulator_ops wm8994_ldo2_ops = {
<------>.list_voltage = wm8994_ldo2_list_voltage,
<------>.get_voltage_sel = regulator_get_voltage_sel_regmap,
<------>.set_voltage_sel = regulator_set_voltage_sel_regmap,
};
 
static const struct regulator_desc wm8994_ldo_desc[] = {
<------>{
<------><------>.name = "LDO1",
<------><------>.id = 1,
<------><------>.type = REGULATOR_VOLTAGE,
<------><------>.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
<------><------>.vsel_reg = WM8994_LDO_1,
<------><------>.vsel_mask = WM8994_LDO1_VSEL_MASK,
<------><------>.ops = &wm8994_ldo1_ops,
<------><------>.min_uV = 2400000,
<------><------>.uV_step = 100000,
<------><------>.enable_time = 3000,
<------><------>.owner = THIS_MODULE,
<------>},
<------>{
<------><------>.name = "LDO2",
<------><------>.id = 2,
<------><------>.type = REGULATOR_VOLTAGE,
<------><------>.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
<------><------>.vsel_reg = WM8994_LDO_2,
<------><------>.vsel_mask = WM8994_LDO2_VSEL_MASK,
<------><------>.ops = &wm8994_ldo2_ops,
<------><------>.enable_time = 3000,
<------><------>.owner = THIS_MODULE,
<------>},
};
 
static const struct regulator_consumer_supply wm8994_ldo_consumer[] = {
<------>{ .supply = "AVDD1" },
<------>{ .supply = "DCVDD" },
};
 
static const struct regulator_init_data wm8994_ldo_default[] = {
<------>{
<------><------>.constraints = {
<------><------><------>.valid_ops_mask = REGULATOR_CHANGE_STATUS,
<------><------>},
<------><------>.num_consumer_supplies = 1,
<------>},
<------>{
<------><------>.constraints = {
<------><------><------>.valid_ops_mask = REGULATOR_CHANGE_STATUS,
<------><------>},
<------><------>.num_consumer_supplies = 1,
<------>},
};
 
static int wm8994_ldo_probe(struct platform_device *pdev)
{
<------>struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
<------>struct wm8994_pdata *pdata = dev_get_platdata(wm8994->dev);
<------>int id = pdev->id % ARRAY_SIZE(pdata->ldo);
<------>struct regulator_config config = { };
<------>struct wm8994_ldo *ldo;
<------>struct gpio_desc *gpiod;
<------>int ret;
 
<------>dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
 
<------>ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL);
<------>if (!ldo)
<------><------>return -ENOMEM;
 
<------>ldo->wm8994 = wm8994;
<------>ldo->supply = wm8994_ldo_consumer[id];
<------>ldo->supply.dev_name = dev_name(wm8994->dev);
 
<------>config.dev = wm8994->dev;
<------>config.driver_data = ldo;
<------>config.regmap = wm8994->regmap;
<------>config.init_data = &ldo->init_data;
 
<------>/*
<------> * Look up LDO enable GPIO from the parent device node, we don't
<------> * use devm because the regulator core will free the GPIO
<------> */
<------>gpiod = gpiod_get_optional(pdev->dev.parent,
<------><------><------><------>   id ? "wlf,ldo2ena" : "wlf,ldo1ena",
<------><------><------><------>   GPIOD_OUT_LOW |
<------><------><------><------>   GPIOD_FLAGS_BIT_NONEXCLUSIVE);
<------>if (IS_ERR(gpiod))
<------><------>return PTR_ERR(gpiod);
<------>config.ena_gpiod = gpiod;
 
<------>/* Use default constraints if none set up */
<------>if (!pdata || !pdata->ldo[id].init_data || wm8994->dev->of_node) {
<------><------>dev_dbg(wm8994->dev, "Using default init data, supply %s %s\n",
<------><------><------>ldo->supply.dev_name, ldo->supply.supply);
 
<------><------>ldo->init_data = wm8994_ldo_default[id];
<------><------>ldo->init_data.consumer_supplies = &ldo->supply;
<------><------>if (!gpiod)
<------><------><------>ldo->init_data.constraints.valid_ops_mask = 0;
<------>} else {
<------><------>ldo->init_data = *pdata->ldo[id].init_data;
<------>}
 
<------>/*
<------> * At this point the GPIO descriptor is handled over to the
<------> * regulator core and we need not worry about it on the
<------> * error path.
<------> */
<------>ldo->regulator = devm_regulator_register(&pdev->dev,
<------><------><------><------><------><------> &wm8994_ldo_desc[id],
<------><------><------><------><------><------> &config);
<------>if (IS_ERR(ldo->regulator)) {
<------><------>ret = PTR_ERR(ldo->regulator);
<------><------>dev_err(wm8994->dev, "Failed to register LDO%d: %d\n",
<------><------><------>id + 1, ret);
<------><------>return ret;
<------>}
 
<------>platform_set_drvdata(pdev, ldo);
 
<------>return 0;
}
 
static struct platform_driver wm8994_ldo_driver = {
<------>.probe = wm8994_ldo_probe,
<------>.driver		= {
<------><------>.name	= "wm8994-ldo",
<------>},
};
 
module_platform_driver(wm8994_ldo_driver);
 
/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM8994 LDO driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8994-ldo");