diff options
Diffstat (limited to 'drivers/mfd/simple-mfd-i2c.c')
| -rw-r--r-- | drivers/mfd/simple-mfd-i2c.c | 106 |
1 files changed, 96 insertions, 10 deletions
diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c index 87f684cff9a1..8b751d8e3b5a 100644 --- a/drivers/mfd/simple-mfd-i2c.c +++ b/drivers/mfd/simple-mfd-i2c.c @@ -2,49 +2,135 @@ /* * Simple MFD - I2C * + * Author(s): + * Michael Walle <michael@walle.cc> + * Lee Jones <lee.jones@linaro.org> + * * This driver creates a single register map with the intention for it to be * shared by all sub-devices. Children can use their parent's device structure * (dev.parent) in order to reference it. * * Once the register map has been successfully initialised, any sub-devices - * represented by child nodes in Device Tree will be subsequently registered. + * represented by child nodes in Device Tree or via the MFD cells in this file + * will be subsequently registered. */ +#include <linux/array_size.h> +#include <linux/dev_printk.h> +#include <linux/err.h> #include <linux/i2c.h> -#include <linux/kernel.h> +#include <linux/mfd/core.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/property.h> #include <linux/regmap.h> +#include <linux/stddef.h> + +#include "simple-mfd-i2c.h" -static const struct regmap_config simple_regmap_config = { +static const struct regmap_config regmap_config_8r_8v = { .reg_bits = 8, .val_bits = 8, }; static int simple_mfd_i2c_probe(struct i2c_client *i2c) { - const struct regmap_config *config; + const struct simple_mfd_data *simple_mfd_data; + const struct regmap_config *regmap_config; struct regmap *regmap; + int ret; - config = device_get_match_data(&i2c->dev); - if (!config) - config = &simple_regmap_config; + simple_mfd_data = device_get_match_data(&i2c->dev); - regmap = devm_regmap_init_i2c(i2c, config); + /* If no regmap_config is specified, use the default 8reg and 8val bits */ + if (!simple_mfd_data || !simple_mfd_data->regmap_config) + regmap_config = ®map_config_8r_8v; + else + regmap_config = simple_mfd_data->regmap_config; + + regmap = devm_regmap_init_i2c(i2c, regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); - return devm_of_platform_populate(&i2c->dev); + /* If no MFD cells are specified, register using the DT child nodes instead */ + if (!simple_mfd_data || !simple_mfd_data->mfd_cell) + return devm_of_platform_populate(&i2c->dev); + + ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, + simple_mfd_data->mfd_cell, + simple_mfd_data->mfd_cell_size, + NULL, 0, NULL); + if (ret) + dev_err(&i2c->dev, "Failed to add child devices\n"); + + return ret; } +static const struct mfd_cell sy7636a_cells[] = { + { .name = "sy7636a-regulator", }, + { .name = "sy7636a-temperature", }, +}; + +static const struct simple_mfd_data silergy_sy7636a = { + .mfd_cell = sy7636a_cells, + .mfd_cell_size = ARRAY_SIZE(sy7636a_cells), +}; + +static const struct mfd_cell max5970_cells[] = { + { .name = "max5970-regulator", }, + { .name = "max5970-iio", }, + { .name = "max5970-led", }, +}; + +static const struct simple_mfd_data maxim_max5970 = { + .mfd_cell = max5970_cells, + .mfd_cell_size = ARRAY_SIZE(max5970_cells), +}; + +static const struct mfd_cell max77705_sensor_cells[] = { + { .name = "max77705-battery" }, + { .name = "max77705-hwmon", }, +}; + +static const struct simple_mfd_data maxim_mon_max77705 = { + .mfd_cell = max77705_sensor_cells, + .mfd_cell_size = ARRAY_SIZE(max77705_sensor_cells), +}; + +static const struct regmap_config spacemit_p1_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct mfd_cell spacemit_p1_cells[] = { + { .name = "spacemit-p1-regulator", }, + { .name = "spacemit-p1-rtc", }, +}; + +static const struct simple_mfd_data spacemit_p1 = { + .regmap_config = &spacemit_p1_regmap_config, + .mfd_cell = spacemit_p1_cells, + .mfd_cell_size = ARRAY_SIZE(spacemit_p1_cells), +}; + static const struct of_device_id simple_mfd_i2c_of_match[] = { + { .compatible = "fsl,ls1028aqds-fpga" }, + { .compatible = "fsl,lx2160aqds-fpga" }, + { .compatible = "fsl,lx2160ardb-fpga" }, { .compatible = "kontron,sl28cpld" }, + { .compatible = "maxim,max5970", .data = &maxim_max5970 }, + { .compatible = "maxim,max5978", .data = &maxim_max5970 }, + { .compatible = "maxim,max77705-battery", .data = &maxim_mon_max77705 }, + { .compatible = "silergy,sy7636a", .data = &silergy_sy7636a }, + { .compatible = "spacemit,p1", .data = &spacemit_p1 }, {} }; MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match); static struct i2c_driver simple_mfd_i2c_driver = { - .probe_new = simple_mfd_i2c_probe, + .probe = simple_mfd_i2c_probe, .driver = { .name = "simple-mfd-i2c", .of_match_table = simple_mfd_i2c_of_match, |