[PATCH v4 2/3] hwmon: tmp108: Add support for I3C device

[Frank Li]

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 at nxp.com>
---
change from v3 to v4
- use module_i3c_i2c_driver

change from v2 to v3
- change kconfig to select REGMAP_I3C if enable i3c
- remove i3c/master.h
- remove , after {}
- use #ifdef CONFIG_I3C about i3c register code

I2C    I3C
Y       Y       support both
Y       N       i3c part code will not be compiled
N       Y       whole TPM108 will not be compiled
N       N       whole TPM108 will not be compiled
---
 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 d43ca7aa4a548..9579db7849e1f 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2298,6 +2298,7 @@ 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 bfbea6349a95f..1f36af2cd2d94 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 at jmuir.com>");
 MODULE_DESCRIPTION("Texas Instruments TMP108 temperature sensor driver");

-- 
2.34.1