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| author | Jean Delvare <khali@linux-fr.org> | 2009-07-28 18:31:39 +0400 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-07-28 18:31:39 +0400 |
| commit | 1b54ab450b180eaeeb0eee6f0f64349246a22c14 (patch) | |
| tree | eb32e1dc8215af14b05500463c8d4c18186277cf /drivers/hwmon/smsc47m1.c | |
| parent | 4733fd328f14280900435d9dbae1487d110a4d56 (diff) | |
| download | linux-1b54ab450b180eaeeb0eee6f0f64349246a22c14.tar.xz | |
hwmon: (smsc47m1) Differentiate between LPC47M233 and LPC47M292
The SMSC LPC47M233 and LPC47M292 chips have the same device ID but
are not compatible.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Juerg Haefliger <juergh@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/hwmon/smsc47m1.c')
| -rw-r--r-- | drivers/hwmon/smsc47m1.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/hwmon/smsc47m1.c b/drivers/hwmon/smsc47m1.c index a92dbb97ee99..ba75bfcf14ce 100644 --- a/drivers/hwmon/smsc47m1.c +++ b/drivers/hwmon/smsc47m1.c @@ -86,6 +86,7 @@ superio_exit(void) #define SUPERIO_REG_ACT 0x30 #define SUPERIO_REG_BASE 0x60 #define SUPERIO_REG_DEVID 0x20 +#define SUPERIO_REG_DEVREV 0x21 /* Logical device registers */ @@ -429,6 +430,9 @@ static int __init smsc47m1_find(unsigned short *addr, * The LPC47M292 (device id 0x6B) is somewhat compatible, but it * supports a 3rd fan, and the pin configuration registers are * unfortunately different. + * The LPC47M233 has the same device id (0x6B) but is not compatible. + * We check the high bit of the device revision register to + * differentiate them. */ switch (val) { case 0x51: @@ -448,6 +452,13 @@ static int __init smsc47m1_find(unsigned short *addr, sio_data->type = smsc47m1; break; case 0x6B: + if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) { + pr_debug(DRVNAME ": " + "Found SMSC LPC47M233, unsupported\n"); + superio_exit(); + return -ENODEV; + } + pr_info(DRVNAME ": Found SMSC LPC47M292\n"); sio_data->type = smsc47m2; break; |