14fd41151SChen-Yu Tsai /* 24fd41151SChen-Yu Tsai * I2C driver for the X-Powers' Power Management ICs 34fd41151SChen-Yu Tsai * 44fd41151SChen-Yu Tsai * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC 54fd41151SChen-Yu Tsai * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature 64fd41151SChen-Yu Tsai * as well as configurable GPIOs. 74fd41151SChen-Yu Tsai * 84fd41151SChen-Yu Tsai * This driver supports the I2C variants. 94fd41151SChen-Yu Tsai * 104fd41151SChen-Yu Tsai * Copyright (C) 2014 Carlo Caione 114fd41151SChen-Yu Tsai * 124fd41151SChen-Yu Tsai * Author: Carlo Caione <carlo@caione.org> 134fd41151SChen-Yu Tsai * 144fd41151SChen-Yu Tsai * This program is free software; you can redistribute it and/or modify 154fd41151SChen-Yu Tsai * it under the terms of the GNU General Public License version 2 as 164fd41151SChen-Yu Tsai * published by the Free Software Foundation. 174fd41151SChen-Yu Tsai */ 184fd41151SChen-Yu Tsai 194fd41151SChen-Yu Tsai #include <linux/acpi.h> 204fd41151SChen-Yu Tsai #include <linux/err.h> 214fd41151SChen-Yu Tsai #include <linux/i2c.h> 224fd41151SChen-Yu Tsai #include <linux/module.h> 234fd41151SChen-Yu Tsai #include <linux/mfd/axp20x.h> 244fd41151SChen-Yu Tsai #include <linux/of.h> 254fd41151SChen-Yu Tsai #include <linux/regmap.h> 264fd41151SChen-Yu Tsai #include <linux/slab.h> 274fd41151SChen-Yu Tsai 284fd41151SChen-Yu Tsai static int axp20x_i2c_probe(struct i2c_client *i2c, 294fd41151SChen-Yu Tsai const struct i2c_device_id *id) 304fd41151SChen-Yu Tsai { 314fd41151SChen-Yu Tsai struct axp20x_dev *axp20x; 324fd41151SChen-Yu Tsai int ret; 334fd41151SChen-Yu Tsai 344fd41151SChen-Yu Tsai axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); 354fd41151SChen-Yu Tsai if (!axp20x) 364fd41151SChen-Yu Tsai return -ENOMEM; 374fd41151SChen-Yu Tsai 384fd41151SChen-Yu Tsai axp20x->dev = &i2c->dev; 394fd41151SChen-Yu Tsai axp20x->irq = i2c->irq; 404fd41151SChen-Yu Tsai dev_set_drvdata(axp20x->dev, axp20x); 414fd41151SChen-Yu Tsai 424fd41151SChen-Yu Tsai ret = axp20x_match_device(axp20x); 434fd41151SChen-Yu Tsai if (ret) 444fd41151SChen-Yu Tsai return ret; 454fd41151SChen-Yu Tsai 464fd41151SChen-Yu Tsai axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg); 474fd41151SChen-Yu Tsai if (IS_ERR(axp20x->regmap)) { 484fd41151SChen-Yu Tsai ret = PTR_ERR(axp20x->regmap); 494fd41151SChen-Yu Tsai dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 504fd41151SChen-Yu Tsai return ret; 514fd41151SChen-Yu Tsai } 524fd41151SChen-Yu Tsai 534fd41151SChen-Yu Tsai return axp20x_device_probe(axp20x); 544fd41151SChen-Yu Tsai } 554fd41151SChen-Yu Tsai 564fd41151SChen-Yu Tsai static int axp20x_i2c_remove(struct i2c_client *i2c) 574fd41151SChen-Yu Tsai { 584fd41151SChen-Yu Tsai struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); 594fd41151SChen-Yu Tsai 604fd41151SChen-Yu Tsai return axp20x_device_remove(axp20x); 614fd41151SChen-Yu Tsai } 624fd41151SChen-Yu Tsai 634fd41151SChen-Yu Tsai static const struct of_device_id axp20x_i2c_of_match[] = { 644fd41151SChen-Yu Tsai { .compatible = "x-powers,axp152", .data = (void *)AXP152_ID }, 654fd41151SChen-Yu Tsai { .compatible = "x-powers,axp202", .data = (void *)AXP202_ID }, 664fd41151SChen-Yu Tsai { .compatible = "x-powers,axp209", .data = (void *)AXP209_ID }, 674fd41151SChen-Yu Tsai { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID }, 684fd41151SChen-Yu Tsai { }, 694fd41151SChen-Yu Tsai }; 704fd41151SChen-Yu Tsai MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match); 714fd41151SChen-Yu Tsai 724fd41151SChen-Yu Tsai /* 734fd41151SChen-Yu Tsai * This is useless for OF-enabled devices, but it is needed by I2C subsystem 744fd41151SChen-Yu Tsai */ 754fd41151SChen-Yu Tsai static const struct i2c_device_id axp20x_i2c_id[] = { 764fd41151SChen-Yu Tsai { }, 774fd41151SChen-Yu Tsai }; 784fd41151SChen-Yu Tsai MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); 794fd41151SChen-Yu Tsai 804fd41151SChen-Yu Tsai static const struct acpi_device_id axp20x_i2c_acpi_match[] = { 814fd41151SChen-Yu Tsai { 824fd41151SChen-Yu Tsai .id = "INT33F4", 834fd41151SChen-Yu Tsai .driver_data = AXP288_ID, 844fd41151SChen-Yu Tsai }, 854fd41151SChen-Yu Tsai { }, 864fd41151SChen-Yu Tsai }; 874fd41151SChen-Yu Tsai MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match); 884fd41151SChen-Yu Tsai 894fd41151SChen-Yu Tsai static struct i2c_driver axp20x_i2c_driver = { 904fd41151SChen-Yu Tsai .driver = { 914fd41151SChen-Yu Tsai .name = "axp20x-i2c", 924fd41151SChen-Yu Tsai .of_match_table = of_match_ptr(axp20x_i2c_of_match), 934fd41151SChen-Yu Tsai .acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match), 944fd41151SChen-Yu Tsai }, 954fd41151SChen-Yu Tsai .probe = axp20x_i2c_probe, 964fd41151SChen-Yu Tsai .remove = axp20x_i2c_remove, 974fd41151SChen-Yu Tsai .id_table = axp20x_i2c_id, 984fd41151SChen-Yu Tsai }; 994fd41151SChen-Yu Tsai 1004fd41151SChen-Yu Tsai module_i2c_driver(axp20x_i2c_driver); 1014fd41151SChen-Yu Tsai 1024fd41151SChen-Yu Tsai MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X"); 1034fd41151SChen-Yu Tsai MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); 1044fd41151SChen-Yu Tsai MODULE_LICENSE("GPL"); 105