diff options
| author | Mulin Chao <mlchao@nuvoton.com> | 2017-04-10 11:32:57 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-04-16 11:51:21 -0700 |
| commit | ea7226e207cde297948f028bb9cb2bbf711c943f (patch) | |
| tree | 1859ba342bfa7b83c48c4f76b67bef30d96e581f /board/npcx_evb | |
| parent | c9d4c1cd6dd1082bd8ae7b2997cb4516315d648d (diff) | |
| download | chrome-ec-ea7226e207cde297948f028bb9cb2bbf711c943f.tar.gz | |
npcx_evb: npcx_evb_arm: kahlee: Change pwm frequency of fan.
Change pwm freq of fan from 100 to 25kHz. Normally, the operating freq
of pwm fan is around 25kHz. The inappropriate pwm freq will cause the
response time of fan spped is too long. Please notice the source clock
of pwm is apb2 now. The clock will be gating if ec enters deep sleep.
It should not enalbe CONFIG_LOW_POWER_S0 in board-level driver if fan is
used.
BRANCH=none
BUG=none
TEST=test fan used in kahlee and Sunon fan with fanset command on
npcx_evb and use faninfo for verifying.
Change-Id: Ic0e7509d9cdb2758bc6e674c207ac3dfbdc59dbe
Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/472647
Reviewed-by: Shawn N <shawnn@chromium.org>
Diffstat (limited to 'board/npcx_evb')
| -rw-r--r-- | board/npcx_evb/board.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/board/npcx_evb/board.c b/board/npcx_evb/board.c index baaf040e15..570d615d01 100644 --- a/board/npcx_evb/board.c +++ b/board/npcx_evb/board.c @@ -45,7 +45,7 @@ BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT); /******************************************************************************/ /* PWM channels. Must be in the exactly same order as in enum pwm_channel. */ const struct pwm_t pwm_channels[] = { - [PWM_CH_FAN] = { 0, PWM_CONFIG_DSLEEP | PWM_CONFIG_OPEN_DRAIN, 100}, + [PWM_CH_FAN] = { 0, PWM_CONFIG_OPEN_DRAIN, 25000}, [PWM_CH_KBLIGHT] = { 1, 0, 10000 }, }; BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT); |