diff options
Diffstat (limited to 'drivers/mfd/arizona-i2c.c')
| -rw-r--r-- | drivers/mfd/arizona-i2c.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-i2c.c b/drivers/mfd/arizona-i2c.c new file mode 100644 index 000000000..bfc7cf56f --- /dev/null +++ b/drivers/mfd/arizona-i2c.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Arizona-i2c.c -- Arizona I2C bus interface + * + * Copyright 2012 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + */ + +#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) +{ + const void *match_data; + struct arizona *arizona; + const struct regmap_config *regmap_config = NULL; + unsigned long type = 0; + int ret; + + match_data = device_get_match_data(&i2c->dev); + if (match_data) + type = (unsigned long)match_data; + else if (id) + 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 void arizona_i2c_remove(struct i2c_client *i2c) +{ + struct arizona *arizona = dev_get_drvdata(&i2c->dev); + + arizona_dev_exit(arizona); +} + +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); + +#ifdef CONFIG_OF +static const struct of_device_id arizona_i2c_of_match[] = { + { .compatible = "wlf,wm5102", .data = (void *)WM5102 }, + { .compatible = "wlf,wm5110", .data = (void *)WM5110 }, + { .compatible = "wlf,wm8280", .data = (void *)WM8280 }, + { .compatible = "wlf,wm8997", .data = (void *)WM8997 }, + { .compatible = "wlf,wm8998", .data = (void *)WM8998 }, + { .compatible = "wlf,wm1814", .data = (void *)WM1814 }, + {}, +}; +#endif + +static struct i2c_driver arizona_i2c_driver = { + .driver = { + .name = "arizona", + .pm = &arizona_pm_ops, + .of_match_table = of_match_ptr(arizona_i2c_of_match), + }, + .probe = arizona_i2c_probe, + .remove = arizona_i2c_remove, + .id_table = arizona_i2c_id, +}; + +module_i2c_driver(arizona_i2c_driver); + +MODULE_SOFTDEP("pre: arizona_ldo1"); +MODULE_DESCRIPTION("Arizona I2C bus interface"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |