Change in coreboot[master]: google/gru: Scarlet gpio4cd use 1.8V powerdomain

[Lin Huang (Code Review)]

Lin Huang has uploaded this change for review. ( https://review.coreboot.org/20802

Change subject: google/gru: Scarlet gpio4cd use 1.8V powerdomain
......................................................................

google/gru: Scarlet gpio4cd use 1.8V powerdomain

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

Change-Id: Ib5a8b2a4d92502fb829688d0a3e1b645d53cd7fc
Signed-off-by: Lin Huang 
---
M src/mainboard/google/gru/bootblock.c
1 file changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/02/20802/1

diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c
index 7359f2a..d0a5182 100644
--- a/src/mainboard/google/gru/bootblock.c
+++ b/src/mainboard/google/gru/bootblock.c
@@ -44,6 +44,10 @@
     */
    write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 0));

+	/* Scarlet gpio2ab 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. */