drivers/mfd/axp20x-rsb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * RSB 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 RSB variants.
  10  *
  11  * Copyright (C) 2015 Chen-Yu Tsai
  12  *
  13  * Author: Chen-Yu Tsai <wens@csie.org>
  14  */
  15
  16 #include <linux/acpi.h>
  17 #include <linux/err.h>
  18 #include <linux/mfd/axp20x.h>
  19 #include <linux/module.h>
  20 #include <linux/of.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23 #include <linux/sunxi-rsb.h>
  24
  25 static int axp20x_rsb_probe(struct sunxi_rsb_device *rdev)
  26 {
  27         struct axp20x_dev *axp20x;
  28         int ret;
  29
  30         axp20x = devm_kzalloc(&rdev->dev, sizeof(*axp20x), GFP_KERNEL);
  31         if (!axp20x)
  32                 return -ENOMEM;
  33
  34         axp20x->dev = &rdev->dev;
  35         axp20x->irq = rdev->irq;
  36         dev_set_drvdata(&rdev->dev, axp20x);
  37
  38         ret = axp20x_match_device(axp20x);
  39         if (ret)
  40                 return ret;
  41
  42         axp20x->regmap = devm_regmap_init_sunxi_rsb(rdev, axp20x->regmap_cfg);
  43         if (IS_ERR(axp20x->regmap)) {
  44                 ret = PTR_ERR(axp20x->regmap);
  45                 dev_err(&rdev->dev, "regmap init failed: %d\n", ret);
  46                 return ret;
  47         }
  48
  49         return axp20x_device_probe(axp20x);
  50 }
  51
  52 static int axp20x_rsb_remove(struct sunxi_rsb_device *rdev)
  53 {
  54         struct axp20x_dev *axp20x = sunxi_rsb_device_get_drvdata(rdev);
  55
  56         return axp20x_device_remove(axp20x);
  57 }
  58
  59 static const struct of_device_id axp20x_rsb_of_match[] = {
  60         { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
  61         { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
  62         { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
  63         { .compatible = "x-powers,axp809", .data = (void *)AXP809_ID },
  64         { .compatible = "x-powers,axp813", .data = (void *)AXP813_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");