diff options
| author | Yilun Lin <yllin@google.com> | 2019-05-30 14:14:32 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-06-17 04:57:55 +0000 |
| commit | 35afaa622676de0b72b727e9ed602bf0820934e7 (patch) | |
| tree | 92634c76fb5a52f53b0c45b7844a78b2f057c83f | |
| parent | 4c69831f59ad7fd335c9c8e0dc3dc5bb5f5eebda (diff) | |
| download | chrome-ec-35afaa622676de0b72b727e9ed602bf0820934e7.tar.gz | |
krane: Limit backlight LED max current.
High display current results to a broken display on Krane rev3.
Karne rev3 can only support up to 90mA current to backlight LED.
We should limit this value from 120mA(maximun) to 90mA.
TEST=i2cxfer r 0 0x68 0xa4; see 0x07
i2cxfer r 0 0x68 0xa5; see 0xbf
combine these two value we have 0x5ff which is 0x7ff * 90/120;
BUG=b:133655155
BRANCH=None
Change-Id: I809628fcc71145801f9fb82815ae40f77a91e2e9
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1635138
Tested-by: Yilun Lin <yllin@chromium.org>
Commit-Queue: Yilun Lin <yllin@chromium.org>
Auto-Submit: Yilun Lin <yllin@chromium.org>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
| -rw-r--r-- | board/kukui/board.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/board/kukui/board.c b/board/kukui/board.c index 6192b4481b..6fb2ad4dc5 100644 --- a/board/kukui/board.c +++ b/board/kukui/board.c @@ -483,20 +483,29 @@ struct motion_sensor_t motion_sensors[] = { }; const unsigned int motion_sensor_count = ARRAY_SIZE(motion_sensors); +#endif /* SECTION_IS_RW */ + #ifdef BOARD_KRANE -static void fix_krane_ref(void) +static void fix_krane(void) { if (board_get_version() != 3) return; + /* + * Fix backlight led maximum current: tolerance 120mA * 0.75 = 90mA. + * (b/133655155) + */ + mt6370_backlight_set_dim(MT6370_BLDIM_DEFAULT * 3 / 4); + +#ifdef SECTION_IS_RW + /* Fix reference point */ motion_sensors[LID_ACCEL].rot_standard_ref = &lid_standard_ref_rev3; motion_sensors[LID_GYRO].rot_standard_ref = &lid_standard_ref_rev3; +#endif /* SECTION_IS_RW */ } -DECLARE_HOOK(HOOK_INIT, fix_krane_ref, HOOK_PRIO_INIT_ADC + 1); +DECLARE_HOOK(HOOK_INIT, fix_krane, HOOK_PRIO_INIT_ADC + 1); #endif /* BOARD_KRANE */ -#endif /* SECTION_IS_RW */ - int board_allow_i2c_passthru(int port) { return (port == I2C_PORT_VIRTUAL_BATTERY); |