1 /* 2 * I2C 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 I2C variants. 9 * 10 * Copyright (C) 2014 Carlo Caione 11 * 12 * Author: Carlo Caione <carlo@caione.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/i2c.h> 22 #include <linux/module.h> 23 #include <linux/mfd/axp20x.h> 24 #include <linux/of.h> 25 #include <linux/regmap.h> 26 #include <linux/slab.h> 27 28 static int axp20x_i2c_probe(struct i2c_client *i2c, 29 const struct i2c_device_id *id) 30 { 31 struct axp20x_dev *axp20x; 32 int ret; 33 34 axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); 35 if (!axp20x) 36 return -ENOMEM; 37 38 axp20x->dev = &i2c->dev; 39 axp20x->irq = i2c->irq; 40 dev_set_drvdata(axp20x->dev, axp20x); 41 42 ret = axp20x_match_device(axp20x); 43 if (ret) 44 return ret; 45 46 axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg); 47 if (IS_ERR(axp20x->regmap)) { 48 ret = PTR_ERR(axp20x->regmap); 49 dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 50 return ret; 51 } 52 53 return axp20x_device_probe(axp20x); 54 } 55 56 static int axp20x_i2c_remove(struct i2c_client *i2c) 57 { 58 struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); 59 60 return axp20x_device_remove(axp20x); 61 } 62 63 static const struct of_device_id axp20x_i2c_of_match[] = { 64 { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID }, 65 { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID }, 66 { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID }, 67 { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID }, 68 { }, 69 }; 70 MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match); 71 72 static const struct i2c_device_id axp20x_i2c_id[] = { 73 { "axp152", 0 }, 74 { "axp202", 0 }, 75 { "axp209", 0 }, 76 { "axp221", 0 }, 77 { }, 78 }; 79 MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); 80 81 static const struct acpi_device_id axp20x_i2c_acpi_match[] = { 82 { 83 .id = "INT33F4", 84 .driver_data = AXP288_ID, 85 }, 86 { }, 87 }; 88 MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match); 89 90 static struct i2c_driver axp20x_i2c_driver = { 91 .driver = { 92 .name = "axp20x-i2c", 93 .of_match_table = of_match_ptr(axp20x_i2c_of_match), 94 .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match), 95 }, 96 .probe = axp20x_i2c_probe, 97 .remove = axp20x_i2c_remove, 98 .id_table = axp20x_i2c_id, 99 }; 100 101 module_i2c_driver(axp20x_i2c_driver); 102 103 MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X"); 104 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 105 MODULE_LICENSE("GPL"); 106