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
  25 static 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
  53 static int axp20x_i2c_remove(struct i2c_client *i2c)
  54 {
  55         struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
  56
  57         return axp20x_device_remove(axp20x);
  58 }
  59
  60 static const struct of_device_id axp20x_i2c_of_match[] = {
  61         { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
  62         { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
  63         { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
  64         { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
  65         { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
  66         { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
  67         { },
  68 };
  69 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
  70
  71 static const struct i2c_device_id axp20x_i2c_id[] = {
  72         { "axp152", 0 },
  73         { "axp202", 0 },
  74         { "axp209", 0 },
  75         { "axp221", 0 },
  76         { "axp223", 0 },
  77         { "axp806", 0 },
  78         { },
  79 };
  80 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
  81
  82 static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
  83         {
  84                 .id = "INT33F4",
  85                 .driver_data = AXP288_ID,
  86         },
  87         { },
  88 };
  89 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
  90
  91 static struct i2c_driver axp20x_i2c_driver = {
  92         .driver = {
  93                 .name   = "axp20x-i2c",
  94                 .of_match_table = of_match_ptr(axp20x_i2c_of_match),
  95                 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
  96         },
  97         .probe          = axp20x_i2c_probe,
  98         .remove         = axp20x_i2c_remove,
  99         .id_table       = axp20x_i2c_id,
 100 };
 101
 102 module_i2c_driver(axp20x_i2c_driver);
 103
 104 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
 105 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
 106 MODULE_LICENSE("GPL");