hwmon: (lm75) Add NXP P3T1755 support

Add this LM75 compatible sensor which needs a separate entry because of
its default sampling time and SMBusAlert handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20241218074131.4351-7-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/hwmon/lm75.rst b/Documentation/hwmon/lm75.rst
index 6adab608dd05c1b99e941689878d324e6d31fe17..9877ddbbf7c874d6463aa49a7c75abeb83b9fd28 100644 (file)
--- a/Documentation/hwmon/lm75.rst
+++ b/Documentation/hwmon/lm75.rst
@@ -121,9 +121,9 @@ Supported chips:
 
          https://www.ti.com/product/TMP1075
 
-  * NXP LM75B, PCT2075
+  * NXP LM75B, P3T1755, PCT2075
 
-    Prefix: 'lm75b', 'pct2075'
+    Prefix: 'lm75b', 'p3t1755', 'pct2075'
 
     Addresses scanned: none
 
@@ -131,6 +131,8 @@ Supported chips:
 
               https://www.nxp.com/documents/data_sheet/LM75B.pdf
 
+               https://www.nxp.com/docs/en/data-sheet/P3T1755.pdf
+
                https://www.nxp.com/docs/en/data-sheet/PCT2075.pdf
 
   * AMS OSRAM AS6200

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 2c2205aec7d40b92f248976221c4497766d88df9..a8f95bef68cbcd529e85dbe6cc3b6f790f26f063 100644 (file)
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -38,6 +38,7 @@ enum lm75_type {              /* keep sorted in alphabetical order */
        max6626,
        max31725,
        mcp980x,
+       p3t1755,
        pct2075,
        stds75,
        stlm75,
@@ -222,6 +223,13 @@ static const struct lm75_params device_params[] = {
                .default_resolution = 9,
                .default_sample_time = MSEC_PER_SEC / 18,
        },
+       [p3t1755] = {
+               .clr_mask = 1 << 1 | 1 << 7,    /* disable SMBAlert and one-shot */
+               .default_resolution = 12,
+               .default_sample_time = 55,
+               .num_sample_times = 4,
+               .sample_times = (unsigned int []){ 28, 55, 110, 220 },
+       },
        [pct2075] = {
                .default_resolution = 11,
                .default_sample_time = MSEC_PER_SEC / 10,
@@ -734,6 +742,7 @@ static const struct i2c_device_id lm75_ids[] = {
        { "max31725", max31725, },
        { "max31726", max31725, },
        { "mcp980x", mcp980x, },
+       { "p3t1755", p3t1755, },
        { "pct2075", pct2075, },
        { "stds75", stds75, },
        { "stlm75", stlm75, },
@@ -813,6 +822,10 @@ static const struct of_device_id __maybe_unused lm75_of_match[] = {
                .compatible = "maxim,mcp980x",
                .data = (void *)mcp980x
        },
+       {
+               .compatible = "nxp,p3t1755",
+               .data = (void *)p3t1755
+       },
        {
                .compatible = "nxp,pct2075",
                .data = (void *)pct2075