Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Simple MFD - I2C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * This driver creates a single register map with the intention for it to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * shared by all sub-devices.  Children can use their parent's device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * (dev.parent) in order to reference it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Once the register map has been successfully initialised, any sub-devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * represented by child nodes in Device Tree will be subsequently registered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static const struct regmap_config simple_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	.reg_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	.val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static int simple_mfd_i2c_probe(struct i2c_client *i2c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	const struct regmap_config *config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	config = device_get_match_data(&i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if (!config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		config = &simple_regmap_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	regmap = devm_regmap_init_i2c(i2c, config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	if (IS_ERR(regmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		return PTR_ERR(regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	return devm_of_platform_populate(&i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static const struct of_device_id simple_mfd_i2c_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	{ .compatible = "kontron,sl28cpld" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static struct i2c_driver simple_mfd_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	.probe_new = simple_mfd_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		.name = "simple-mfd-i2c",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		.of_match_table = simple_mfd_i2c_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) module_i2c_driver(simple_mfd_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) MODULE_DESCRIPTION("Simple MFD - I2C driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) MODULE_LICENSE("GPL v2");