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: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Farouk Bouabid <farouk.bouabid@xxxxxxxxx>
---
drivers/hwmon/amc6821.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index ec94392fcb65..a3fdbcf01ecd 100644
--- a/drivers/hwmon/amc6821.c
+++ b/drivers/hwmon/amc6821.c
@@ -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>
@@ -897,7 +898,6 @@ 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,
};
@@ -924,6 +924,13 @@ 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);
@@ -941,6 +948,9 @@ static const struct of_device_id __maybe_unused amc6821_of_match[] = {
{
.compatible = "ti,amc6821",
},
+ {
+ .compatible = "tsd,mule",
+ },
{ }
};
--
2.34.1
