Commit 8f38236d authored by Farouk Bouabid's avatar Farouk Bouabid Committed by Guenter Roeck
Browse files

hwmon: (amc6821) add support for tsd,mule 



Theobroma Systems Mule is an MCU that emulates a set of I2C devices,
among which is an amc6821 and other devices that are reachable through
an I2C-mux.

The devices on the mux can be selected by writing the appropriate device
number to an I2C config register (amc6821: reg 0xff)

Implement "tsd,mule" compatible to instantiate the I2C-mux platform device
when probing the amc6821.

Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarFarouk Bouabid <farouk.bouabid@cherry.de>
Message-ID: <20240906-dev-mule-i2c-mux-v8-4-dbd28a150e41@cherry.de>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 247a80fd

drivers/hwmon/amc6821.c

+11 −1
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <linux/minmax.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/of_platform.h>

#include <linux/regmap.h>

#include <linux/slab.h>
@@ -893,7 +894,6 @@ static bool amc6821_volatile_reg(struct device *dev, unsigned int reg) 
static const struct regmap_config amc6821_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = AMC6821_REG_CONF3,

	.volatile_reg = amc6821_volatile_reg,

	.cache_type = REGCACHE_MAPLE,

};
@@ -920,6 +920,13 @@ static int amc6821_probe(struct i2c_client *client) 
	if (err)

		return err;



	if (of_device_is_compatible(dev->of_node, "tsd,mule")) {

		err = devm_of_platform_populate(dev);

		if (err)

			return dev_err_probe(dev, err,

				     "Failed to create sub-devices\n");

	}



	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,

							 data, &amc6821_chip_info,

							 amc6821_groups);
@@ -937,6 +944,9 @@ static const struct of_device_id __maybe_unused amc6821_of_match[] = { 
	{

		.compatible = "ti,amc6821",

	},

	{

		.compatible = "tsd,mule",

	},

	{ }

};