[PATCH 6.12.y-cip 17/19] hwmon: (tmp108) Add support for I3C device

Tommaso Merciai
2026-01-08T09:31:40Z

From: Frank Li <Frank.Li@nxp.com>

commit c40655e3310649866c4ebf7a10f0d53802ebdfa9 upstream.

Add support for I3C device in the tmp108 driver to handle the P3T1085
sensor. Register the I3C device driver to enable I3C functionality for the
sensor.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Message-ID: <20241112-p3t1085-v4-2-a1334314b1e6@nxp.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
drivers/hwmon/Kconfig | 1 +
drivers/hwmon/tmp108.c | 35 ++++++++++++++++++++++++++++++++++-
2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 6cb831da6048..c986cda1c7dd 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2275,6 +2275,7 @@ config SENSORS_TMP108
tristate "Texas Instruments TMP108"
depends on I2C
select REGMAP_I2C
+ select REGMAP_I3C if I3C
help
If you say yes here you get support for Texas Instruments TMP108
sensor chips and NXP P3T1085.
diff --git a/drivers/hwmon/tmp108.c b/drivers/hwmon/tmp108.c
index bfbea6349a95..1f36af2cd2d9 100644
--- a/drivers/hwmon/tmp108.c
+++ b/drivers/hwmon/tmp108.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/i2c.h>
+#include <linux/i3c/device.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/regmap.h>
@@ -440,7 +441,39 @@ static struct i2c_driver tmp108_driver = {
.id_table = tmp108_i2c_ids,
};

-module_i2c_driver(tmp108_driver);
+static const struct i3c_device_id p3t1085_i3c_ids[] = {
+ I3C_DEVICE(0x011b, 0x1529, NULL),
+ {}
+};
+MODULE_DEVICE_TABLE(i3c, p3t1085_i3c_ids);
+
+static int p3t1085_i3c_probe(struct i3c_device *i3cdev)
+{
+ struct device *dev = i3cdev_to_dev(i3cdev);
+ struct regmap *regmap;
+
+#ifdef CONFIG_REGMAP_I3C
+ regmap = devm_regmap_init_i3c(i3cdev, &tmp108_regmap_config);
+#else
+ regmap = ERR_PTR(-ENODEV);
+#endif
+
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap),
+ "Failed to register i3c regmap\n");
+
+ return tmp108_common_probe(dev, regmap, "p3t1085_i3c");
+}
+
+static struct i3c_driver p3t1085_driver = {
+ .driver = {
+ .name = "p3t1085_i3c",
+ },
+ .probe = p3t1085_i3c_probe,
+ .id_table = p3t1085_i3c_ids,
+};
+
+module_i3c_i2c_driver(p3t1085_driver, &tmp108_driver)

MODULE_AUTHOR("John Muir <john@jmuir.com>");
MODULE_DESCRIPTION("Texas Instruments TMP108 temperature sensor driver");
--
2.43.0