From: "Michel Dänzer" <michel@daenzer.net>
To: Colin Leroy <colin@colino.net>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: [PATCH] therm_adt746x: Always clear hardware bit which inverts fan speed range.
Date: Fri, 22 May 2009 22:59:10 +0200 [thread overview]
Message-ID: <1243025950-11037-1-git-send-email-michel@daenzer.net> (raw)
This bit would get enabled sometimes (probably after suspend/resume), so the
fan would run at full speed below the temperature thresholds, but slow down and
eventually stop if temperatures rose above the thresholds... not exactly what
you want.
Signed-off-by: Michel Dänzer <michel@daenzer.net>
---
drivers/macintosh/therm_adt746x.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
index 82607ad..321eaad 100644
--- a/drivers/macintosh/therm_adt746x.c
+++ b/drivers/macintosh/therm_adt746x.c
@@ -37,6 +37,7 @@
#define CONFIG_REG 0x40
#define MANUAL_MASK 0xe0
#define AUTO_MASK 0x20
+#define INVERT_MASK 0x10
static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
@@ -229,7 +230,8 @@ static void write_fan_speed(struct thermostat *th, int speed, int fan)
if (speed >= 0) {
manual = read_reg(th, MANUAL_MODE[fan]);
- write_reg(th, MANUAL_MODE[fan], manual|MANUAL_MASK);
+ write_reg(th, MANUAL_MODE[fan],
+ (manual|MANUAL_MASK) & (~INVERT_MASK));
write_reg(th, FAN_SPD_SET[fan], speed);
} else {
/* back to automatic */
--
1.6.3
reply other threads:[~2009-05-22 21:05 UTC|newest]
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