From 0a7701be57da9d1653382530bd81aaca64dea511 Mon Sep 17 00:00:00 2001 From: Vic Yang Date: Mon, 30 Apr 2012 21:33:37 +0800 Subject: [PATCH] Prevent issuing warning when fan is off LM4 reports fan stalled when fan speed is set to 0. Need to check this before issuing warning. Signed-off-by: Vic Yang BUG=chrome-os-partner:7497 TEST=Did not see fan stall warning when fan speed is 0. Change-Id: I8eecca8516b5442d4943d9195d04acc5b4041085 --- chip/lm4/pwm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chip/lm4/pwm.c b/chip/lm4/pwm.c index d5082b54e9..62bd08a571 100644 --- a/chip/lm4/pwm.c +++ b/chip/lm4/pwm.c @@ -132,7 +132,8 @@ static void update_lpc_mapped_memory(void) static void check_fan_failure(void) { - if ((LM4_FAN_FANCTL & (1 << FAN_CH_CPU)) && + if (pwm_get_fan_target_rpm() != 0 && + (LM4_FAN_FANCTL & (1 << FAN_CH_CPU)) && ((LM4_FAN_FANSTS >> (2 * FAN_CH_CPU)) & 0x03) == 0) { /* Fan enabled but stalled. Issues warning. * As we have thermal shutdown protection, issuing warning