drivers/mfd/axp20x-rsb.c

   1 /*
   2  * RSB driver for the X-Powers' Power Management ICs
   3  *
   4  * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
   5  * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
   6  * as well as configurable GPIOs.
   7  *
   8  * This driver supports the RSB variants.
   9  *
  10  * Copyright (C) 2015 Chen-Yu Tsai
  11  *
  12  * Author: Chen-Yu Tsai <wens@csie.org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/acpi.h>
  20 #include <linux/err.h>
  21 #include <linux/mfd/axp20x.h>
  22 #include <linux/module.h>
  23 #include <linux/of.h>
  24 #include <linux/regmap.h>
  25 #include <linux/slab.h>
  26 #include <linux/sunxi-rsb.h>
  27
  28 static int axp20x_rsb_probe(struct sunxi_rsb_device *rdev)
  29 {
  30         struct axp20x_dev *axp20x;
  31         int ret;
  32
  33         axp20x = devm_kzalloc(&rdev->dev, sizeof(*axp20x), GFP_KERNEL);
  34         if (!axp20x)
  35                 return -ENOMEM;
  36
  37         axp20x->dev = &rdev->dev;
  38         axp20x->irq = rdev->irq;
  39         dev_set_drvdata(&rdev->dev, axp20x);
  40
  41         ret = axp20x_match_device(axp20x);
  42         if (ret)
  43                 return ret;
  44
  45         axp20x->regmap = devm_regmap_init_sunxi_rsb(rdev, axp20x->regmap_cfg);
  46         if (IS_ERR(axp20x->regmap)) {
  47                 ret = PTR_ERR(axp20x->regmap);
  48                 dev_err(&rdev->dev, "regmap init failed: %d\n", ret);
  49                 return ret;
  50         }
  51
  52         return axp20x_device_probe(axp20x);
  53 }
  54
  55 static int axp20x_rsb_remove(struct sunxi_rsb_device *rdev)
  56 {
  57         struct axp20x_dev *axp20x = sunxi_rsb_device_get_drvdata(rdev);
  58
  59         return axp20x_device_remove(axp20x);
  60 }
  61
  62 static const struct of_device_id axp20x_rsb_of_match[] = {
  63         { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
  64         { .compatible = "x-powers,axp809", .data = (void *)AXP809_ID },
  65         { },
  66 };
  67 MODULE_DEVICE_TABLE(of, axp20x_rsb_of_match);
  68
  69 static struct sunxi_rsb_driver axp20x_rsb_driver = {
  70         .driver = {
  71                 .name   = "axp20x-rsb",
  72                 .of_match_table = of_match_ptr(axp20x_rsb_of_match),
  73         },
  74         .probe  = axp20x_rsb_probe,
  75         .remove = axp20x_rsb_remove,
  76 };
  77 module_sunxi_rsb_driver(axp20x_rsb_driver);
  78
  79 MODULE_DESCRIPTION("PMIC MFD sunXi RSB driver for AXP20X");
  80 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
  81 MODULE_LICENSE("GPL v2");