Commit 2e9a41bb authored by Jagan Teki's avatar Jagan Teki Committed by Guenter Roeck
Browse files

hwmon: (lm75) Add STLM75 support 



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: default avatarJagan Teki <jagan@amarulasolutions.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 48049e20

Documentation/hwmon/lm75

+5 −0
Original line number Diff line number Diff line
@@ -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

drivers/hwmon/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/hwmon/lm75.c

+10 −0
Original line number Diff line number Diff line
@@ -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