diff options
| author | Matt DeVillier <matt.devillier@gmail.com> | 2017-02-07 22:07:56 -0600 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2017-02-14 13:03:53 +0100 |
| commit | 474a7c51cecfd2e37b315da9cfb25607f3ad84f1 (patch) | |
| tree | 126b3ae7d166557e9c9692d11a7af1c5ca1e565a /src/mainboard/google/rambi/variants/candy/include | |
| parent | d81078d944bd78b1dca559444d938f18d4004205 (diff) | |
google/rambi: add explicit pull-down for ram-id
Some variants need the internal pull resistor on GPIO_SSUS_40
set explicitly to pull down rather than disabling the pull,
in order for the ram-id to be read correctly via GPIO.
Correct this by adding a function to enable and set the internal pull
and define its use as needed in the board's variant.h.
Chromium source:
branch: firmware-gnawty-5216.239.B
/src/soc/intel/baytrail/baytrail/gpio.h#418
/src/mainboard/google/gnawty/romstage.c#60
Test: boot 4GB Candy board and observe correct RAM id, amount detected
Change-Id: I8823c27385f4422184b5afa57f6048f7ff2a25ab
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/18309
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/mainboard/google/rambi/variants/candy/include')
| -rw-r--r-- | src/mainboard/google/rambi/variants/candy/include/variant/variant.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mainboard/google/rambi/variants/candy/include/variant/variant.h b/src/mainboard/google/rambi/variants/candy/include/variant/variant.h index 0c58ceefa2..fe4c475825 100644 --- a/src/mainboard/google/rambi/variants/candy/include/variant/variant.h +++ b/src/mainboard/google/rambi/variants/candy/include/variant/variant.h @@ -38,5 +38,6 @@ static const uint32_t dual_channel_config = #define GPIO_SSUS_38_PAD 50 #define GPIO_SSUS_39_PAD 58 #define GPIO_SSUS_40_PAD 52 +#define GPIO_SSUS_40_PAD_USE_PULLDOWN #endif |