LXR linux/drivers/mfd/axp20x-i2c.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * I2C driver for the X-Powers' Power Management ICs
   4 *
   5 * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
   6 * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
   7 * as well as configurable GPIOs.
   8 *
   9 * This driver supports the I2C variants.
  10 *
  11 * Copyright (C) 2014 Carlo Caione
  12 *
  13 * Author: Carlo Caione <carlo@caione.org>
  14 */
  15
  16#include <linux/acpi.h>
  17#include <linux/err.h>
  18#include <linux/i2c.h>
  19#include <linux/module.h>
  20#include <linux/mfd/axp20x.h>
  21#include <linux/of.h>
  22#include <linux/regmap.h>
  23#include <linux/slab.h>
  24
  25static int axp20x_i2c_probe(struct i2c_client *i2c,
  26                            const struct i2c_device_id *id)
  27{
  28        struct axp20x_dev *axp20x;
  29        int ret;
  30
  31        axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
  32        if (!axp20x)
  33                return -ENOMEM;
  34
  35        axp20x->dev = &i2c->dev;
  36        axp20x->irq = i2c->irq;
  37        dev_set_drvdata(axp20x->dev, axp20x);
  38
  39        ret = axp20x_match_device(axp20x);
  40        if (ret)
  41                return ret;
  42
  43        axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
  44        if (IS_ERR(axp20x->regmap)) {
  45                ret = PTR_ERR(axp20x->regmap);
  46                dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
  47                return ret;
  48        }
  49
  50        return axp20x_device_probe(axp20x);
  51}
  52
  53static int axp20x_i2c_remove(struct i2c_client *i2c)
  54{
  55        struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
  56
  57        axp20x_device_remove(axp20x);
  58
  59        return 0;
  60}
  61
  62#ifdef CONFIG_OF
  63static const struct of_device_id axp20x_i2c_of_match[] = {
  64        { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
  65        { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
  66        { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
  67        { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
  68        { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
  69        { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
  70        { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
  71        { },
  72};
  73MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
  74#endif
  75
  76static const struct i2c_device_id axp20x_i2c_id[] = {
  77        { "axp152", 0 },
  78        { "axp202", 0 },
  79        { "axp209", 0 },
  80        { "axp221", 0 },
  81        { "axp223", 0 },
  82        { "axp803", 0 },
  83        { "axp806", 0 },
  84        { },
  85};
  86MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
  87
  88#ifdef CONFIG_ACPI
  89static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
  90        {
  91                .id = "INT33F4",
  92                .driver_data = AXP288_ID,
  93        },
  94        { },
  95};
  96MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
  97#endif
  98
  99static struct i2c_driver axp20x_i2c_driver = {
 100        .driver = {
 101                .name   = "axp20x-i2c",
 102                .of_match_table = of_match_ptr(axp20x_i2c_of_match),
 103                .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
 104        },
 105        .probe          = axp20x_i2c_probe,
 106        .remove         = axp20x_i2c_remove,
 107        .id_table       = axp20x_i2c_id,
 108};
 109
 110module_i2c_driver(axp20x_i2c_driver);
 111
 112MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
 113MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
 114MODULE_LICENSE("GPL");
 115