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google/gru: select 1.8V as gpio2ab io domain 

On kevin board, both the gpio2ab's io domain APIO2_VDDPST and
APIO2_VDD are 1.8V. So gpio2ab can only output 1.8V.

BRANCH=none
BUG=chrome-os-partner:52510
TEST=Apply this patch, CPU1_SDIO_PWREN(GPIO2_A2) can output 1.8V

Change-Id: Iefe58cf5ad83a8e79916ad177d148c1036283668
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 9c4afee265f3f31c1defee08cb89ab3e45ff8d1a
Original-Change-Id: I0216c8efb7ef9256b878adeeee0a52335bf69f93
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/337194
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/14726
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Lin Huang 2016-03-28 20:17:32 +08:00 committed by Patrick Georgi
parent b9a7877568
commit be929f41af
1 changed files with 13 additions and 0 deletions
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13
src/mainboard/google/gru/bootblock.c
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@ -22,6 +22,19 @@
void bootblock_mainboard_early_init(void) void bootblock_mainboard_early_init(void)
{ {
/* Let gpio2ab io domains works at 1.8V.
*
* If io_vsel[0] == 0(default value), gpio2ab io domains is 3.0V
* powerd by APIO2_VDD, otherwise, 1.8V supplied by APIO2_VDDPST.
* But from the schematic of kevin rev0, the APIO2_VDD and
* APIO2_VDDPST both are 1.8V(intentionally?).
*
* So, by default, CPU1_SDIO_PWREN(GPIO2_A2) can't output 3.0V
* because the supply is 1.8V.
* Let ask GPIO2_A2 output 1.8V to make GPIO interal logic happy.
*/
write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 0));
if (IS_ENABLED(CONFIG_DRIVERS_UART)) { if (IS_ENABLED(CONFIG_DRIVERS_UART)) {
_Static_assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE, _Static_assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE,
"CONSOLE_SERIAL_UART should be UART2"); "CONSOLE_SERIAL_UART should be UART2");