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 {
  27         struct axp20x_dev *axp20x;
  28         int ret;
  29
  30         axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
  31         if (!axp20x)
  32                 return -ENOMEM;
  33
  34         axp20x->dev = &i2c->dev;
  35         axp20x->irq = i2c->irq;
  36         dev_set_drvdata(axp20x->dev, axp20x);
  37
  38         ret = axp20x_match_device(axp20x);
  39         if (ret)
  40                 return ret;
  41
  42         axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
  43         if (IS_ERR(axp20x->regmap)) {
  44                 ret = PTR_ERR(axp20x->regmap);
  45                 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
  46                 return ret;
  47         }
  48
  49         return axp20x_device_probe(axp20x);
  50 }
  51
  52 static void axp20x_i2c_remove(struct i2c_client *i2c)
  53 {
  54         struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
  55
  56         axp20x_device_remove(axp20x);
  57 }
  58
  59 #ifdef CONFIG_OF
  60 static const struct of_device_id axp20x_i2c_of_match[] = {
  61         { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
  62         { .compatible = "x-powers,axp192", .data = (void *)AXP192_ID },
  63         { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
  64         { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
  65         { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
  66         { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
  67         { .compatible = "x-powers,axp313a", .data = (void *)AXP313A_ID },
  68         { .compatible = "x-powers,axp323", .data = (void *)AXP323_ID },
  69         { .compatible = "x-powers,axp717", .data = (void *)AXP717_ID },
  70         { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
  71         { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
  72         { .compatible = "x-powers,axp15060", .data = (void *)AXP15060_ID },
  73         { },
  74 };
  75 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
  76 #endif
  77
  78 static const struct i2c_device_id axp20x_i2c_id[] = {
  79         { "axp152" },
  80         { "axp192" },
  81         { "axp202" },
  82         { "axp209" },
  83         { "axp221" },
  84         { "axp223" },
  85         { "axp313a" },
  86         { "axp717" },
  87         { "axp803" },
  88         { "axp806" },
  89         { "axp15060" },
  90         { }
  91 };
  92 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
  93
  94 #ifdef CONFIG_ACPI
  95 static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
  96         {
  97                 .id = "INT33F4",
  98                 .driver_data = AXP288_ID,
  99         },
 100         { },
 101 };
 102 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
 103 #endif
 104
 105 static struct i2c_driver axp20x_i2c_driver = {
 106         .driver = {
 107                 .name   = "axp20x-i2c",
 108                 .of_match_table = of_match_ptr(axp20x_i2c_of_match),
 109                 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
 110         },
 111         .probe          = axp20x_i2c_probe,
 112         .remove         = axp20x_i2c_remove,
 113         .id_table       = axp20x_i2c_id,
 114 };
 115
 116 module_i2c_driver(axp20x_i2c_driver);
 117
 118 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
 119 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
 120 MODULE_LICENSE("GPL");