Martin L Roth has submitted this change. ( https://review.coreboot.org/c/coreboot/+/72694 )
Change subject: mb/google/skyrim/var/frostflow: Override SPI flash bus speed ......................................................................
mb/google/skyrim/var/frostflow: Override SPI flash bus speed
Add configuration to bump up the SPI flash bus speed from 66 MHz to 100 MHz starting the board version of the current phase.
BUG=b:260127676 TEST=Build and boot to OS in Frostflow with 100 MHz SPI bus speed. Observe that the boot time improved by 100 ms compared to 66 MHz SPI flash bus speed.
firmware log: SPI fast read speed: 100 MHz At 66 MHz: Total Time: 1,563,384 At 100 MHz: Total Time: 1,462,570
Change-Id: I9435f4ad0d3541b040703dc9a453badbd080dc09 Signed-off-by: Frank Wu frank_wu@compal.corp-partner.google.com Reviewed-on: https://review.coreboot.org/c/coreboot/+/72694 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Eric Lai eric_lai@quanta.corp-partner.google.com Reviewed-by: Martin L Roth gaumless@gmail.com --- M src/mainboard/google/skyrim/Kconfig 1 file changed, 30 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Martin L Roth: Looks good to me, approved Eric Lai: Looks good to me, approved
diff --git a/src/mainboard/google/skyrim/Kconfig b/src/mainboard/google/skyrim/Kconfig index d945474..55b6ece 100644 --- a/src/mainboard/google/skyrim/Kconfig +++ b/src/mainboard/google/skyrim/Kconfig @@ -157,6 +157,7 @@ config OVERRIDE_EFS_SPI_SPEED_MIN_BOARD hex default 0x5 if BOARD_GOOGLE_SKYRIM + default 0x1 if BOARD_GOOGLE_FROSTFLOW default 0xffffffff help Minimum board version starting which the Override EFS SPI Speed