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// SPDX-License-Identifier: GPL-2.0-only
/*
* Simple MFD - I2C
*
* 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.
*/
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/regmap.h>
static const struct regmap_config simple_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static int simple_mfd_i2c_probe(struct i2c_client *i2c)
{
const struct regmap_config *config;
struct regmap *regmap;
config = device_get_match_data(&i2c->dev);
if (!config)
config = &simple_regmap_config;
regmap = devm_regmap_init_i2c(i2c, config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return devm_of_platform_populate(&i2c->dev);
}
static const struct of_device_id simple_mfd_i2c_of_match[] = {
{ .compatible = "kontron,sl28cpld" },
{}
};
MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
static struct i2c_driver simple_mfd_i2c_driver = {
.probe_new = simple_mfd_i2c_probe,
.driver = {
.name = "simple-mfd-i2c",
.of_match_table = simple_mfd_i2c_of_match,
},
};
module_i2c_driver(simple_mfd_i2c_driver);
MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
MODULE_DESCRIPTION("Simple MFD - I2C driver");
MODULE_LICENSE("GPL v2");
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