diff options
| author | Hung-Te Lin <hungte@chromium.org> | 2018-09-13 00:18:27 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-09-16 08:35:12 +0000 |
| commit | f89c56a54d62495804167eef40b2718cfdade185 (patch) | |
| tree | b439a41759e00e674e10acba8a03d0d67ccff77a /src/mainboard/google/kukui | |
| parent | f349672966fcde4f943c2a5de3c086971aaded44 (diff) | |
google/kukui: Notify EC that AP is in S0
We have a pin from AP to EC, called AP_IN_SLEEP_L (SRCLKENA0 on AP side,
pad R23) that is supposed to be high in S0, and low in S3 (and X/don't
care in S5).
This should be set as early as possible in bootblock.
BUG=b:113367227
TEST=make; boots and verified AP_IN_SLEEP_L GPIO is high.
BRANCH=None
Change-Id: Icd59fa366c162e7443b8932a851e65f110f551ab
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/28585
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@google.com>
Diffstat (limited to 'src/mainboard/google/kukui')
| -rw-r--r-- | src/mainboard/google/kukui/bootblock.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/google/kukui/bootblock.c b/src/mainboard/google/kukui/bootblock.c index a9bad4e0bc..07285882d7 100644 --- a/src/mainboard/google/kukui/bootblock.c +++ b/src/mainboard/google/kukui/bootblock.c @@ -21,6 +21,7 @@ #include "gpio.h" #define BOOTBLOCK_EN_L (GPIO(KPROW0)) +#define AP_IN_SLEEP_L (GPIO(SRCLKENA0)) void bootblock_mainboard_init(void) { @@ -29,6 +30,9 @@ void bootblock_mainboard_init(void) /* Turn on real eMMC. */ gpio_output(BOOTBLOCK_EN_L, 1); + /* Declare we are in S0 */ + gpio_output(AP_IN_SLEEP_L, 1); + mtk_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, SPI_PAD0_MASK, 6 * MHz); mtk_spi_init(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, SPI_PAD0_MASK, 26 * MHz); } |