diff options
| author | Rizwan Qureshi <rizwan.qureshi@intel.com> | 2019-02-17 11:31:21 +0530 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-02-27 11:05:13 +0000 |
| commit | 8aadab7e96854bf8d43f117724089dc8d5869efd (patch) | |
| tree | f9cbd40e118a2e6c2e1fd5a2533cdbe384f7c0a3 /src/soc/intel/cannonlake/Kconfig | |
| parent | e64c25ca1a550132e1ad35208d6a71d553d57879 (diff) | |
soc/intel/cannonlake: Add a config for configuring SD_VDD1_PWR_EN#
SD controller in CNL-PCH provides a ability to configure the behavior of
SD_VDD1_PWR_EN# as an active high or low signal. FSP provides an UPD
"SdCardPowerEnableActiveHigh" to control the same.
However, for platforms using SD_VDD1_PWR_EN# as active high, the SDXC
card connector is always powered and may impact system power. This is because
SD_VDD1_PWR_EN# does not de-assert during SDXC D3 or when SD card is not
inserted.
Workaround is to change the pad ownership of SD_VDD1_PWR_EN to GPIO and
force the TX buffer to low in _PS3. And restore the pad mode to native
function in _PS0.
Hence add a Kconfig option to update the UPD, which the board can select
based on how the SD_VDD1_PWR_EN is implemented on it. And, the workaround
gets applied based on this config.
BUG=b:123350329
Change-Id: Iee262d7ecdf8c31362aec3d95dd9b3e8359e0c25
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/c/31445
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/cannonlake/Kconfig')
| -rw-r--r-- | src/soc/intel/cannonlake/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig index cd8819d2cc..927409d281 100644 --- a/src/soc/intel/cannonlake/Kconfig +++ b/src/soc/intel/cannonlake/Kconfig @@ -235,6 +235,15 @@ config CBFS_SIZE hex default 0x200000 +config MB_HAS_ACTIVE_HIGH_SD_PWR_ENABLE + bool + default n + help + Select this if the board has a SD_PWR_ENABLE pin connected to a + active high sensing load switch to turn on power to the card reader. + This will enable a workaround in ASL _PS3 and _PS0 methods to force + SD_PWR_ENABLE to stay low in D3. + choice prompt "Cache-as-ram implementation" default USE_CANNONLAKE_CAR_NEM_ENHANCED if MAINBOARD_HAS_CHROMEOS |