From: Guenter Roeck <linux@roeck-us.net>
Date: Sat, 7 Feb 2015 02:59:34 +0000 (-0800)
Subject: Enable fan 3-5 on ASRock Z77 Pro4-M
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=ad00077d680fba0530befe9e9ebb94ea090ce9ed;p=groeck-nct6775

Enable fan 3-5 on ASRock Z77 Pro4-M

ASRock Z77 Pro4-M BIOS version 2.00 is known to not enable fan 3 to 5
if booted in UEFI Ultra-FastBoot mode.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---

diff --git a/nct6775.c b/nct6775.c
index 0e81050..198fc46 100644
--- a/nct6775.c
+++ b/nct6775.c
@@ -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"
 #include "compat.h"
@@ -3215,10 +3216,27 @@ 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);
 
 		superio_select(sioreg, NCT6775_LD_HWM);
 		regval = superio_inb(sioreg, SIO_REG_ENABLE);
 
+		/*
+		 * ASRock Z77 Pro4-M is known to not enable fan 3..5
+		 * if booted in UEFI Ultra-FastBoot mode.
+		 */
+		if (!strcmp(board_vendor, "ASRock") &&
+		    !strcmp(board_name, "Z77 Pro4-M")) {
+			if ((regval & 0xe0) != 0xe0) {
+				pr_warn("Enabling Fans 3-5\n");
+				regval |= 0xe0;
+				superio_outb(sioreg, SIO_REG_ENABLE, regval);
+			}
+		}
+
 		data->sio_enable = regval;
 
 		if (regval & 0x80)