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Commit c4f99a2b authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

hwmon: (lm90) Add support for the W83L771W/G 



I was wondering if that chip ever existed publicly... Apparently yes,
so add support for it.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Tested-by: default avatarAlexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Acked-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
parent 0c01b644

Documentation/hwmon/lm90

+10 −2
Original line number Diff line number Diff line
@@ -95,6 +95,10 @@ Supported chips: 
                           0x4c, 0x4d and 0x4e

    Datasheet: Publicly available at the Maxim website

               http://www.maxim-ic.com/datasheet/index.mvp/id/4199

  * Winbond/Nuvoton W83L771W/G

    Prefix: 'w83l771'

    Addresses scanned: I2C 0x4c

    Datasheet: No longer available

  * Winbond/Nuvoton W83L771AWG/ASG

    Prefix: 'w83l771'

    Addresses scanned: I2C 0x4c
@@ -169,11 +173,15 @@ MAX6695 and MAX6696: 
  * Second critical temperature limit

  * Two remote sensors



W83L771W/G

  * The G variant is lead-free, otherwise similar to the W.

  * Filter and alert configuration register at 0xBF

  * Moving average (depending on conversion rate)



W83L771AWG/ASG

  * Successor of the W83L771W/G, same features.

  * The AWG and ASG variants only differ in package format.

  * Filter and alert configuration register at 0xBF

  * Diode ideality factor configuration (remote sensor) at 0xE3

  * Moving average (depending on conversion rate)



All temperature values are given in degrees Celsius. Resolution

is 1.0 degree for the local temperature, 0.125 degree for the remote

drivers/hwmon/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -615,7 +615,7 @@ config SENSORS_LM90 
	  LM86, LM89 and LM99, Analog Devices ADM1032 and ADT7461, Maxim

	  MAX6646, MAX6647, MAX6648, MAX6649, MAX6657, MAX6658, MAX6659,

	  MAX6680, MAX6681, MAX6692, MAX6695, MAX6696, and Winbond/Nuvoton

	  W83L771AWG/ASG sensor chips.

	  W83L771W/G/AWG/ASG sensor chips.



	  This driver can also be built as a module.  If so, the module

	  will be called lm90.

drivers/hwmon/lm90.c

+19 −6
Original line number Diff line number Diff line
@@ -88,8 +88,8 @@ 
 * Addresses to scan

 * Address is fully defined internally and cannot be changed except for

 * MAX6659, MAX6680 and MAX6681.

 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, MAX6649, MAX6657

 * and MAX6658 have address 0x4c.

 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, MAX6649, MAX6657,

 * MAX6658 and W83L771 have address 0x4c.

 * ADM1032-2, ADT7461-2, LM89-1, LM99-1 and MAX6646 have address 0x4d.

 * MAX6647 has address 0x4e.

 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
@@ -1237,12 +1237,25 @@ static int lm90_detect(struct i2c_client *new_client, 
	} else

	if (address == 0x4C

	 && man_id == 0x5C) { /* Winbond/Nuvoton */

		int reg_config2;



		reg_config2 = i2c_smbus_read_byte_data(new_client,

						LM90_REG_R_CONFIG2);

		if (reg_config2 < 0)

			return -ENODEV;



		if ((reg_config1 & 0x2A) == 0x00

		 && (reg_config2 & 0xF8) == 0x00) {

			if (chip_id == 0x01 /* W83L771W/G */

			 && reg_convrate <= 0x09) {

				name = "w83l771";

			} else

			if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */

		 && (reg_config1 & 0x2A) == 0x00

			 && reg_convrate <= 0x08) {

				name = "w83l771";

			}

		}

	}



	if (!name) { /* identification failed */

		dev_dbg(&adapter->dev,