The STLM75 is a high-precision digital CMOS temperature sensor
IC with a sigma-delta temperature-to-digital converter.
The configuration register mapping is similar to existing lm75
but the sample rate is 150ms(max).
Tested on real hardware and verified temperature readings are correct.
Signed-off-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/hwmon/lm75 | 5 +++++
drivers/hwmon/Kconfig | 1 +
drivers/hwmon/lm75.c | 10 ++++++++++
3 files changed, 16 insertions(+)
diff --git a/Documentation/hwmon/lm75 b/Documentation/hwmon/lm75
index 2f1120f88c16..010583608f12 100644
--- a/Documentation/hwmon/lm75
+++ b/Documentation/hwmon/lm75
@@ -42,6 +42,11 @@ Supported chips:
Addresses scanned: none
Datasheet: Publicly available at the ST website
http://www.st.com/internet/analog/product/121769.jsp
+ * ST Microelectronics STLM75
+ Prefix: 'stlm75'
+ Addresses scanned: none
+ Datasheet: Publicly available at the ST website
+ https://www.st.com/resource/en/datasheet/stlm75.pdf
* Texas Instruments TMP100, TMP101, TMP105, TMP112, TMP75, TMP75C, TMP175, TMP275
Prefixes: 'tmp100', 'tmp101', 'tmp105', 'tmp112', 'tmp175', 'tmp75', 'tmp75c', 'tmp275'
Addresses scanned: none
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 532a0532d01b..515b2ad872c8 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1035,6 +1035,7 @@ config SENSORS_LM75
- National Semiconductor LM75, LM75A
- NXP's LM75A
- ST Microelectronics STDS75
+ - ST Microelectronics STLM75
- TelCom (now Microchip) TCN75
- Texas Instruments TMP100, TMP101, TMP105, TMP112, TMP75,
TMP175, TMP275
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index c7f20543b2bf..62acb9f16ec5 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -50,6 +50,7 @@ enum lm75_type { /* keep sorted in alphabetical order */
max31725,
mcp980x,
stds75,
+ stlm75,
tcn75,
tmp100,
tmp101,
@@ -316,6 +317,10 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
data->resolution = 11;
data->sample_time = MSEC_PER_SEC;
break;
+ case stlm75:
+ data->resolution = 9;
+ data->sample_time = MSEC_PER_SEC / 5;
+ break;
case ds7505:
set_mask |= 3 << 5; /* 12-bit mode */
data->resolution = 12;
@@ -424,6 +429,7 @@ static const struct i2c_device_id lm75_ids[] = {
{ "max31726", max31725, },
{ "mcp980x", mcp980x, },
{ "stds75", stds75, },
+ { "stlm75", stlm75, },
{ "tcn75", tcn75, },
{ "tmp100", tmp100, },
{ "tmp101", tmp101, },
@@ -494,6 +500,10 @@ static const struct of_device_id lm75_of_match[] = {
.compatible = "st,stds75",
.data = (void *)stds75
},
+ {
+ .compatible = "st,stlm75",
+ .data = (void *)stlm75
+ },
{
.compatible = "microchip,tcn75",
.data = (void *)tcn75
--
2.18.0.321.gffc6fa0e3
