[PATCH 6.12.y-cip 16/19] hwmon: (tmp108) Add helper function tmp108_common_probe() to prepare I3C support

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

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

commit 700f3250198d51093884254220a96777a922dd47 upstream.

Add help function tmp108_common_probe() to pave road to support i3c for
P3T1085(NXP) chip.

Use dev_err_probe() to simplify the code.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Message-ID: <20241112-p3t1085-v4-1-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/tmp108.c | 39 +++++++++++++++++++++------------------
1 file changed, 21 insertions(+), 18 deletions(-)

diff --git a/drivers/hwmon/tmp108.c b/drivers/hwmon/tmp108.c
index b561b452d8d3..bfbea6349a95 100644
--- a/drivers/hwmon/tmp108.c
+++ b/drivers/hwmon/tmp108.c
@@ -323,33 +323,19 @@ static const struct regmap_config tmp108_regmap_config = {
.use_single_write = true,
};

-static int tmp108_probe(struct i2c_client *client)
+static int tmp108_common_probe(struct device *dev, struct regmap *regmap, char *name)
{
- struct device *dev = &client->dev;
struct device *hwmon_dev;
struct tmp108 *tmp108;
- int err;
u32 config;
-
- if (!i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_WORD_DATA)) {
- dev_err(dev,
- "adapter doesn't support SMBus word transactions\n");
- return -ENODEV;
- }
+ int err;

tmp108 = devm_kzalloc(dev, sizeof(*tmp108), GFP_KERNEL);
if (!tmp108)
return -ENOMEM;

dev_set_drvdata(dev, tmp108);
-
- tmp108->regmap = devm_regmap_init_i2c(client, &tmp108_regmap_config);
- if (IS_ERR(tmp108->regmap)) {
- err = PTR_ERR(tmp108->regmap);
- dev_err(dev, "regmap init failed: %d", err);
- return err;
- }
+ tmp108->regmap = regmap;

err = regmap_read(tmp108->regmap, TMP108_REG_CONF, &config);
if (err < 0) {
@@ -383,13 +369,30 @@ static int tmp108_probe(struct i2c_client *client)
return err;
}

- hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, name,
tmp108,
&tmp108_chip_info,
NULL);
return PTR_ERR_OR_ZERO(hwmon_dev);
}

+static int tmp108_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct regmap *regmap;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_WORD_DATA))
+ return dev_err_probe(dev, -ENODEV,
+ "adapter doesn't support SMBus word transactions\n");
+
+ regmap = devm_regmap_init_i2c(client, &tmp108_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap), "regmap init failed");
+
+ return tmp108_common_probe(dev, regmap, client->name);
+}
+
static int tmp108_suspend(struct device *dev)
{
struct tmp108 *tmp108 = dev_get_drvdata(dev);
--
2.43.0