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kevin: change pwm frequency to reduce EE noise

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Currently we have EEnoise(Decap Switching Noise) from LCD PWM
Kevin use LCD Backlight Driver IC and PWM Frequency from EC
Current 10kHz frequency can make switching Noise easily.

BUG=chrome-os-partner:55169
BRANCH=None
TEST=measuring noise reduced, verifying there was no influence
to LCD/digitizer/tsp

Change-Id: I1e65e56a19177dadba0110de5678669288a8555a
Signed-off-by: Wonjoon Lee <woojoo.lee@samsung.com>
Reviewed-on: https://chromium-review.googlesource.com/360003
Reviewed-by: Shawn N <shawnn@chromium.org>
This commit is contained in:
Wonjoon Lee
2016-07-12 20:10:36 +09:00
committed by chrome-bot
parent 92fa2d6de2
commit 321130438e
1 changed files with 1 additions and 1 deletions
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2
board/kevin/board.c
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@@ -90,7 +90,7 @@ const struct pwm_t pwm_channels[] = {
#ifdef BOARD_KEVIN
[PWM_CH_LED_GREEN] = { 0, PWM_CONFIG_DSLEEP, 100 },
#endif
[PWM_CH_DISPLIGHT] = { 2, 0, 10000 },
[PWM_CH_DISPLIGHT] = { 2, 0, 210 },
[PWM_CH_LED_RED] = { 3, PWM_CONFIG_DSLEEP, 100 },
#ifdef BOARD_KEVIN
[PWM_CH_LED_BLUE] = { 4, PWM_CONFIG_DSLEEP, 100 },