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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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