From 584dbf2e3a1ac0638ad02c954c2d220278adfbf1 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 4 Sep 2016 18:56:46 -0600 Subject: gru: Increase SPI speed to 33MHz Increase the SPI bus speed to speed up boot time. The maximum supported speed at 1.8V is 37.5MHz, and 33MHz is the next lowest convenient speed, given the clock parents. BUG=chrome-os-partner:56556 BRANCH=none TEST=boot on gru and see that things still work correctly. Total time spent on reading from SPI reduces from 185ms to 141ms. Change-Id: I71436c9e343b18360fa63d528dea5cfcfbc831e6 Signed-off-by: Patrick Georgi Original-Commit-Id: d7576f6e53e407af61160be142c3d589e864a8cf Original-Change-Id: I55a19f523817862e081d23469e94fd795456dd67 Original-Signed-off-by: Simon Glass Original-Reviewed-on: https://chromium-review.googlesource.com/381313 Original-Commit-Ready: Julius Werner Original-Tested-by: Simon Glass Original-Reviewed-by: Julius Werner Reviewed-on: https://review.coreboot.org/16708 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth Reviewed-by: Paul Menzel --- src/mainboard/google/gru/bootblock.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/mainboard') diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c index 2214a5caf7..26af58cd81 100644 --- a/src/mainboard/google/gru/bootblock.c +++ b/src/mainboard/google/gru/bootblock.c @@ -82,7 +82,8 @@ void bootblock_mainboard_init(void) /* 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_DEVICE_SPI_FLASH_BUS, 24750*KHz); + rockchip_spi_init(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, 33000*KHz); + rockchip_spi_set_sample_delay(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, 5); /* Set pinmux and configure EC SPI. */ write32(&rk3399_grf->iomux_spi5, IOMUX_SPI5); -- cgit v1.2.3