/* * Arizona-i2c.c -- Arizona I2C bus interface * * Copyright 2012 Wolfson Microelectronics plc * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/err.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/mfd/arizona/core.h> #include "arizona.h" static int arizona_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct arizona *arizona; const struct regmap_config *regmap_config = NULL; unsigned long type; int ret; if (i2c->dev.of_node) type = arizona_of_get_type(&i2c->dev); else type = id->driver_data; switch (type) { case WM5102: if (IS_ENABLED(CONFIG_MFD_WM5102)) regmap_config = &wm5102_i2c_regmap; break; case WM5110: case WM8280: if (IS_ENABLED(CONFIG_MFD_WM5110)) regmap_config = &wm5110_i2c_regmap; break; case WM8997: if (IS_ENABLED(CONFIG_MFD_WM8997)) regmap_config = &wm8997_i2c_regmap; break; case WM8998: case WM1814: if (IS_ENABLED(CONFIG_MFD_WM8998)) regmap_config = &wm8998_i2c_regmap; break; default: dev_err(&i2c->dev, "Unknown device type %ld\n", type); return -EINVAL; } if (!regmap_config) { dev_err(&i2c->dev, "No kernel support for device type %ld\n", type); return -EINVAL; } arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL); if (arizona == NULL) return -ENOMEM; arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config); if (IS_ERR(arizona->regmap)) { ret = PTR_ERR(arizona->regmap); dev_err(&i2c->dev, "Failed to allocate register map: %d\n", ret); return ret; } arizona->type = type; arizona->dev = &i2c->dev; arizona->irq = i2c->irq; return arizona_dev_init(arizona); } static int arizona_i2c_remove(struct i2c_client *i2c) { struct arizona *arizona = dev_get_drvdata(&i2c->dev); arizona_dev_exit(arizona); return 0; } static const struct i2c_device_id arizona_i2c_id[] = { { "wm5102", WM5102 }, { "wm5110", WM5110 }, { "wm8280", WM8280 }, { "wm8997", WM8997 }, { "wm8998", WM8998 }, { "wm1814", WM1814 }, { } }; MODULE_DEVICE_TABLE(i2c, arizona_i2c_id); static struct i2c_driver arizona_i2c_driver = { .driver = { .name = "arizona", .pm = &arizona_pm_ops, .of_match_table = of_match_ptr(arizona_of_match), }, .probe = arizona_i2c_probe, .remove = arizona_i2c_remove, .id_table = arizona_i2c_id, }; module_i2c_driver(arizona_i2c_driver); MODULE_DESCRIPTION("Arizona I2C bus interface"); MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); MODULE_LICENSE("GPL");