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
axp20x_rsb_probe(struct sunxi_rsb_device * rdev)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
axp20x_rsb_remove(struct sunxi_rsb_device * rdev)52 static void axp20x_rsb_remove(struct sunxi_rsb_device *rdev)
53 {
54 struct axp20x_dev *axp20x = sunxi_rsb_device_get_drvdata(rdev);
55
56 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,axp717", .data = (void *)AXP717_ID },
62 { .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
63 { .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
64 { .compatible = "x-powers,axp809", .data = (void *)AXP809_ID },
65 { .compatible = "x-powers,axp813", .data = (void *)AXP813_ID },
66 { },
67 };
68 MODULE_DEVICE_TABLE(of, axp20x_rsb_of_match);
69
70 static struct sunxi_rsb_driver axp20x_rsb_driver = {
71 .driver = {
72 .name = "axp20x-rsb",
73 .of_match_table = of_match_ptr(axp20x_rsb_of_match),
74 },
75 .probe = axp20x_rsb_probe,
76 .remove = axp20x_rsb_remove,
77 };
78 module_sunxi_rsb_driver(axp20x_rsb_driver);
79
80 MODULE_DESCRIPTION("PMIC MFD sunXi RSB driver for AXP20X");
81 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
82 MODULE_LICENSE("GPL v2");
83