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hwmon: (pmbus/ltc2978): Add support for LTC2978A 

Detect LTC2978A chip ID. Treat it as LC2978.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2013-09-23 11:23:37 -07:00
parent c24c407e96
commit 3f08d7f49f
2 changed files with 5 additions and 2 deletions
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3
Documentation/hwmon/ltc2978
View File

@ -10,10 +10,11 @@ Supported chips:
Prefix: 'ltc2977'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2977
* Linear Technology LTC2978
* Linear Technology LTC2978, LTC2978A
Prefix: 'ltc2978'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc2978
http://www.linear.com/product/ltc2978a
* Linear Technology LTC3880
Prefix: 'ltc3880'
Addresses scanned: -

4
drivers/hwmon/pmbus/ltc2978.c
View File

@ -57,6 +57,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
#define LTC2977_ID 0x0130
#define LTC2978_ID_REV1 0x0121
#define LTC2978_ID_REV2 0x0122
#define LTC2978A_ID 0x0124
#define LTC3880_ID 0x4000
#define LTC3880_ID_MASK 0xff00
#define LTC3883_ID 0x4300
@ -397,7 +398,8 @@ static int ltc2978_probe(struct i2c_client *client,
data->id = ltc2974;
} else if (chip_id == LTC2977_ID) {
data->id = ltc2977;
} else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2) {
} else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2 ||
chip_id == LTC2978A_ID) {
data->id = ltc2978;
} else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID) {
data->id = ltc3880;