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 { }, 65 }; 66 MODULE_DEVICE_TABLE(of, axp20x_rsb_of_match); 67 68 static struct sunxi_rsb_driver axp20x_rsb_driver = { 69 .driver = { 70 .name = "axp20x-rsb", 71 .of_match_table = of_match_ptr(axp20x_rsb_of_match), 72 }, 73 .probe = axp20x_rsb_probe, 74 .remove = axp20x_rsb_remove, 75 }; 76 module_sunxi_rsb_driver(axp20x_rsb_driver); 77 78 MODULE_DESCRIPTION("PMIC MFD sunXi RSB driver for AXP20X"); 79 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>"); 80 MODULE_LICENSE("GPL v2"); 81