[PATCH 4.19 203/220] hwmon: (npcm-750-pwm-fan) Change initial pwm target to 255

Greg Kroah-Hartman
2019-11-22T11:05:29Z

From: Kun Yi <kunyi@google.com>

[ Upstream commit f21c8e753b1dcb8f9e5b096db1f7f4e6fdfa7258 ]

Change initial PWM target to 255 to prevent overheating, for example
when BMC hangs in userspace or when userspace fan control application is
not implemented yet.

Signed-off-by: Kun Yi <kunyi@google.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/npcm750-pwm-fan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/npcm750-pwm-fan.c b/drivers/hwmon/npcm750-pwm-fan.c
index b998f9fbed41e..979b579bc118f 100644
--- a/drivers/hwmon/npcm750-pwm-fan.c
+++ b/drivers/hwmon/npcm750-pwm-fan.c
@@ -52,7 +52,7 @@

/* Define the Counter Register, value = 100 for match 100% */
#define NPCM7XX_PWM_COUNTER_DEFAULT_NUM 255
-#define NPCM7XX_PWM_CMR_DEFAULT_NUM 127
+#define NPCM7XX_PWM_CMR_DEFAULT_NUM 255
#define NPCM7XX_PWM_CMR_MAX 255

/* default all PWM channels PRESCALE2 = 1 */
--
2.20.1