diff options
| author | Jean Delvare <khali@linux-fr.org> | 2009-07-28 16:31:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-08-16 14:26:20 -0700 |
| commit | 49a8cf1d49e9c956fcbc999018126804309887d7 (patch) | |
| tree | c1dd7548c1ae0b89e643a1c8c41486a2ddfa4d1e | |
| parent | 7514a6632bbf548999869dc7d873f52ddf917856 (diff) | |
hwmon: (smsc47m1) Differentiate between LPC47M233 and LPC47M292
commit 1b54ab450b180eaeeb0eee6f0f64349246a22c14 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 d1b49854873..fa72f5fc655 100644 --- a/drivers/hwmon/smsc47m1.c +++ b/drivers/hwmon/smsc47m1.c @@ -85,6 +85,7 @@ 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 */ @@ -428,6 +429,9 @@ 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: @@ -447,6 +451,13 @@ 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; |