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google/gru: Use 1.8V powerdomain for gpio4cd on Scarlet 

Scarlet gpio4cd use 1.8V powerdomain, let's make a
correct register setting, otherwise even the uart
does not work.

Change-Id: Ib5a8b2a4d92502fb829688d0a3e1b645d53cd7fc
Signed-off-by: Lin Huang <hl@rock-chips.com>
Reviewed-on: https://review.coreboot.org/20802
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Lin Huang 2017-07-25 09:32:47 +08:00 committed by Julius Werner
parent 6c581bc43f
commit 05c3e84622
1 changed files with 4 additions and 0 deletions
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4
src/mainboard/google/gru/bootblock.c
View File

@ -44,6 +44,10 @@ void bootblock_mainboard_early_init(void)
*/
write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 0));
/* Scarlet gpio4cd iodomain is 1.8V */
if (IS_ENABLED(CONFIG_BOARD_GOOGLE_SCARLET))
write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 3));
if (!IS_ENABLED(CONFIG_BOARD_GOOGLE_SCARLET)) {
/* Enable rails powering GPIO blocks, among other things.
These are EC-controlled on Scarlet and already on. */