diff options
| author | Lin Huang <hl@rock-chips.com> | 2016-03-28 20:17:32 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2016-05-09 08:48:59 +0200 |
| commit | be929f41af9b60c9268bc414fa919eb12f7ba552 (patch) | |
| tree | 3e10eb2d478a94fb6c73d8e7af998bd4c270940e | |
| parent | b9a7877568cf7441cef7879c9948c8c3a8895a60 (diff) | |
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>
| -rw-r--r-- | src/mainboard/google/gru/bootblock.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c index d08b4cba69..74e02b273f 100644 --- a/src/mainboard/google/gru/bootblock.c +++ b/src/mainboard/google/gru/bootblock.c @@ -22,6 +22,19 @@ 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)) { _Static_assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE, "CONSOLE_SERIAL_UART should be UART2"); |