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gru: kevin: enable EC SPI interface 

This configures and enables SPI interface #5 used for EC
communications on Gru/Kevin.

BRANCH=none
BUG=chrome-os-partner:51537
TEST=with the appropriate depthcharge change it is possible to trigger
     booting Chrome OS from the SD card by pressing '^U' on Gru
     keyboard at the right time.

Change-Id: I5304bf47e030c0b9b7794752f30ffdca6c03a4f4
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: b5cc177
Original-Change-Id: I99883daa60562ccddfaeb858c1957d497f05a501
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/346632
Reviewed-on: https://review.coreboot.org/15032
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Vadim Bendebury 2016-05-22 16:25:29 -07:00 committed by Martin Roth
parent 9ed93cb5d5
commit 8f8cf4d336
2 changed files with 6 additions and 3 deletions
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2
src/mainboard/google/gru/Kconfig
View File

@ -56,7 +56,7 @@ config DRAM_SIZE_MB
config EC_GOOGLE_CHROMEEC_SPI_BUS
hex
default 0
default 5
config BOOT_MEDIA_SPI_BUS
int

7
src/mainboard/google/gru/bootblock.c
View File

@ -59,11 +59,14 @@ void bootblock_mainboard_early_init(void)
void bootblock_mainboard_init(void)
{
/* select the pinmux for spi flashrom */
/* Set pinmux and configure spi flashrom. */
write32(&rk3399_pmugrf->spi1_rxd, IOMUX_SPI1_RX);
write32(&rk3399_pmugrf->spi1_csclktx, IOMUX_SPI1_CSCLKTX);
rockchip_spi_init(CONFIG_BOOT_MEDIA_SPI_BUS, 24750*KHz);
/* Set pinmux and configure EC flashrom. */
write32(&rk3399_grf->iomux_spi5, IOMUX_SPI5);
rockchip_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, 3093750);
setup_chromeos_gpios();
}