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eve: Set keyboard backlight PWM to 10kHz

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The TPS61161DRVR used for keyboard backlight expects an input frequency
of 5 to 100 kHz but is currently only getting 100Hz.

With this change the keyboard backlight duty cycle curve behaves as
expected and you no longer need 50% duty cycle to get it to turn on.

Also the keyboard backlight does not need to be enabled in DSLEEP
since that is only possible in S3/S5, so remove the DSLEEP flag.

BUG=chrome-os-partner:61464
BRANCH=none
TEST=test brightness range in sysfs to ensure backlight is visible
at low settings.

Change-Id: I9737827ad4dbd39e342ad370aef46475c273a6bc
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://chromium-review.googlesource.com/446617
Reviewed-by: Scott Collyer <scollyer@chromium.org>
This commit is contained in:
Duncan Laurie
2017-02-22 16:04:23 -08:00
committed by chrome-bot
parent f0b564b4a0
commit b4bddff086
1 changed files with 1 additions and 1 deletions
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2
board/eve/board.c
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@@ -169,7 +169,7 @@ struct keyboard_scan_config keyscan_config = {
/* PWM channels. Must be in the exactly same order as in enum pwm_channel. */
const struct pwm_t pwm_channels[] = {
[PWM_CH_KBLIGHT] = { 5, PWM_CONFIG_DSLEEP, 100 },
[PWM_CH_KBLIGHT] = { 5, 0, 10000 },
[PWM_CH_LED_L_RED] = { 2, PWM_CONFIG_DSLEEP, 100 },
[PWM_CH_LED_L_GREEN] = { 3, PWM_CONFIG_DSLEEP, 100 },
[PWM_CH_LED_L_BLUE] = { 4, PWM_CONFIG_DSLEEP, 100 },