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hwmon: (nct6775) Enable auxiliary fan monitoring on ASRock Z77 Pro4-M 

Auxiliary fan monitoring is not enabled on ASRock Z77 Pro4-M
with BIOS version 2.00 if booted in UEFI Ultra-FastBoot mode.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2015-02-06 18:55:36 -08:00
parent d2a14ea51a
commit 25cdd99deb
1 changed files with 21 additions and 0 deletions
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21
drivers/hwmon/nct6775.c
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@ -57,6 +57,7 @@
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/io.h>
#include "lm75.h"
@ -3199,6 +3200,26 @@ nct6775_check_fan_inputs(struct nct6775_data *data)
pwm6pin = false;
} else if (data->kind == nct6776) {
bool gpok = superio_inb(sioreg, 0x27) & 0x80;
const char *board_vendor, *board_name;
board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
board_name = dmi_get_system_info(DMI_BOARD_NAME);
if (board_name && board_vendor &&
!strcmp(board_vendor, "ASRock")) {
/*
* Auxiliary fan monitoring is not enabled on ASRock
* Z77 Pro4-M if booted in UEFI Ultra-FastBoot mode.
* Observed with BIOS version 2.00.
*/
if (!strcmp(board_name, "Z77 Pro4-M")) {
if ((data->sio_reg_enable & 0xe0) != 0xe0) {
data->sio_reg_enable |= 0xe0;
superio_outb(sioreg, SIO_REG_ENABLE,
data->sio_reg_enable);
}
}
}
if (data->sio_reg_enable & 0x80)
fan3pin = gpok;