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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: Jean Delvare <khali@linux-fr.org>
Tested-by: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
hifive-unleashed-5.1
Jean Delvare 2010-10-28 20:31:44 +02:00 committed by Jean Delvare
parent 0c01b644f7
commit c4f99a2b8f
3 changed files with 31 additions and 10 deletions
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14
Documentation/hwmon/lm90
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@ -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
@ -169,12 +173,16 @@ MAX6695 and MAX6696:
* Second critical temperature limit
* Two remote sensors
W83L771AWG/ASG
* The AWG and ASG variants only differ in package format.
W83L771W/G
* The G variant is lead-free, otherwise similar to the W.
* Filter and alert configuration register at 0xBF
* Diode ideality factor configuration (remote sensor) at 0xE3
* 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.
* Diode ideality factor configuration (remote sensor) at 0xE3
All temperature values are given in degrees Celsius. Resolution
is 1.0 degree for the local temperature, 0.125 degree for the remote
temperature, except for the MAX6657, MAX6658 and MAX6659 which have a

2
drivers/hwmon/Kconfig
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@ -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.

25
drivers/hwmon/lm90.c
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@ -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.
@ -1237,10 +1237,23 @@ static int lm90_detect(struct i2c_client *new_client,
} else
if (address == 0x4C
&& man_id == 0x5C) { /* Winbond/Nuvoton */
if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
&& (reg_config1 & 0x2A) == 0x00
&& reg_convrate <= 0x08) {
name = "w83l771";
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_convrate <= 0x08) {
name = "w83l771";
}
}
}