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| author | Vic Yang <victoryang@chromium.org> | 2012-04-30 21:33:37 +0800 |
|---|---|---|
| committer | Vic Yang <victoryang@chromium.org> | 2012-04-30 21:33:37 +0800 |
| commit | 0a7701be57da9d1653382530bd81aaca64dea511 (patch) | |
| tree | 4f34a929a92ab6d7776030ac8544c34ad21e6b74 /chip/lm4/pwm.c | |
| parent | 31190cf21594f4ada3558693dab50ec6abb0d6b4 (diff) | |
| download | chrome-ec-0a7701be57da9d1653382530bd81aaca64dea511.tar.gz | |
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 <victoryang@chromium.org>
BUG=chrome-os-partner:7497
TEST=Did not see fan stall warning when fan speed is 0.
Change-Id: I8eecca8516b5442d4943d9195d04acc5b4041085
Diffstat (limited to 'chip/lm4/pwm.c')
| -rw-r--r-- | chip/lm4/pwm.c | 3 |
1 files changed, 2 insertions, 1 deletions
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 |