diff options
| author | Guenter Roeck | 2015-02-27 08:23:37 -0800 |
|---|---|---|
| committer | Guenter Roeck | 2015-03-09 09:59:36 -0700 |
| commit | 6552f327cab8eb6c773ba4f702cf6a371d1dc467 (patch) | |
| tree | 53f25df93c54a20473fd53be4e92a195f7491391 /drivers/hwmon | |
| parent | 9c947d25c96ec93485d60f7b783403d518c1418d (diff) | |
hwmon: (nct7904) Strengthen detect function
The bank register has five unused bits. Verify that those bits are zero
to strengthen the detect function.
Cc: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/nct7904.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c index eaa8234e21d0..b77b82f24480 100644 --- a/drivers/hwmon/nct7904.c +++ b/drivers/hwmon/nct7904.c @@ -502,7 +502,8 @@ static int nct7904_detect(struct i2c_client *client, /* Determine the chip type. */ if (i2c_smbus_read_byte_data(client, VENDOR_ID_REG) != NUVOTON_ID || i2c_smbus_read_byte_data(client, CHIP_ID_REG) != NCT7904_ID || - (i2c_smbus_read_byte_data(client, DEVICE_ID_REG) & 0xf0) != 0x50) + (i2c_smbus_read_byte_data(client, DEVICE_ID_REG) & 0xf0) != 0x50 || + (i2c_smbus_read_byte_data(client, BANK_SEL_REG) & 0xf8) != 0x00) return -ENODEV; strlcpy(info->type, "nct7904", I2C_NAME_SIZE); |