[PATCH u-boot-mvebu 1/2] arm: mvebu: turris_omnia: force 40 MHz speed on SPI NOR
Marek Behún
marek.behun at nic.cz
Fri Jul 9 16:56:13 CEST 2021
Commit e2e95e5e2542 ("spi: Update speed/mode on change") changed the
boot time on Turris Omnia from ~2.3s to over 8s, due to SPL loading main
U-Boot from SPI NOR at 1 MHz instead of 40 MHz.
This is because the SPL code passes the CONFIG_SF_DEFAULT_SPEED option
to spi_flash_probe(), and with the above commit spi_flash_probe() starts
prefering this parameter instead of the one specified in device-tree.
The proper solution here would probably be to fix the SF subsystem to
prefer the frequency specified in the device-tree, if it is present, but
I am not sure what else will be affected on other boards with such a
change. So until then we need a more simple fix.
Since the CONFIG_SF_DEFAULT_SPEED option is used by the code, put the
correct value there for Turris Omnia. Also put the correct value to
CONFIG_SF_DEFAULT_MODE and use 40 MHz when reading environment.
Signed-off-by: Marek Behún <marek.behun at nic.cz>
Cc: Stefan Roese <sr at denx.de>
Cc: Tom Rini <trini at konsulko.com>
Cc: Marek Vasut <marex at denx.de>
Cc: Jagan Teki <jagan at amarulasolutions.com>
Cc: Patrick Delaunay <patrick.delaunay at foss.st.com>
Cc: Pali Rohár <pali at kernel.org>
---
configs/turris_omnia_defconfig | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index 57ab384f63..ec2294699f 100644
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -56,7 +56,7 @@ CONFIG_CMD_FS_UUID=y
# CONFIG_SPL_PARTITION_UUIDS is not set
CONFIG_ENV_OVERWRITE=y
CONFIG_USE_ENV_SPI_MAX_HZ=y
-CONFIG_ENV_SPI_MAX_HZ=50000000
+CONFIG_ENV_SPI_MAX_HZ=40000000
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
CONFIG_SPL_OF_TRANSLATE=y
CONFIG_AHCI_PCI=y
@@ -67,6 +67,8 @@ CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_MV=y
CONFIG_SPI_FLASH_MACRONIX=y
CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SF_DEFAULT_MODE=0x0
+CONFIG_SF_DEFAULT_SPEED=40000000
CONFIG_PHY_MARVELL=y
CONFIG_PHY_GIGE=y
CONFIG_MVNETA=y
--
2.31.1
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