diff options
Diffstat (limited to 'drivers/hwmon/lm85.c')
| -rw-r--r-- | drivers/hwmon/lm85.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c index b251d8674b41..6c53d987de10 100644 --- a/drivers/hwmon/lm85.c +++ b/drivers/hwmon/lm85.c @@ -75,6 +75,8 @@ I2C_CLIENT_INSMOD_7(lm85b, lm85c, adm1027, adt7463, adt7468, emc6d100, #define LM85_VERSTEP_GENERIC2 0x70 #define LM85_VERSTEP_LM85C 0x60 #define LM85_VERSTEP_LM85B 0x62 +#define LM85_VERSTEP_LM96000_1 0x68 +#define LM85_VERSTEP_LM96000_2 0x69 #define LM85_VERSTEP_ADM1027 0x60 #define LM85_VERSTEP_ADT7463 0x62 #define LM85_VERSTEP_ADT7463C 0x6A @@ -1133,6 +1135,26 @@ static void lm85_init_client(struct i2c_client *client) dev_warn(&client->dev, "Device is not ready\n"); } +static int lm85_is_fake(struct i2c_client *client) +{ + /* + * Differenciate between real LM96000 and Winbond WPCD377I. The latter + * emulate the former except that it has no hardware monitoring function + * so the readings are always 0. + */ + int i; + u8 in_temp, fan; + + for (i = 0; i < 8; i++) { + in_temp = i2c_smbus_read_byte_data(client, 0x20 + i); + fan = i2c_smbus_read_byte_data(client, 0x28 + i); + if (in_temp != 0x00 || fan != 0xff) + return 0; + } + + return 1; +} + /* Return 0 if detection is successful, -ENODEV otherwise */ static int lm85_detect(struct i2c_client *client, int kind, struct i2c_board_info *info) @@ -1173,6 +1195,16 @@ static int lm85_detect(struct i2c_client *client, int kind, case LM85_VERSTEP_LM85B: kind = lm85b; break; + case LM85_VERSTEP_LM96000_1: + case LM85_VERSTEP_LM96000_2: + /* Check for Winbond WPCD377I */ + if (lm85_is_fake(client)) { + dev_dbg(&adapter->dev, + "Found Winbond WPCD377I, " + "ignoring\n"); + return -ENODEV; + } + break; } } else if (company == LM85_COMPANY_ANALOG_DEV) { switch (verstep) { |