Commit 1b54ab45 authored by Jean Delvare's avatar Jean Delvare
Browse files

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: default avatarJean Delvare <khali@linux-fr.org>
Cc: Juerg Haefliger <juergh@gmail.com>
Acked-by: default avatarHans de Goede <hdegoede@redhat.com>
parent 4733fd32

drivers/hwmon/smsc47m1.c

+11 −0
Original line number Diff line number Diff line
@@ -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;