GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

google/kahlee: Set SPI 100 MHz and SPI Dual Read IO mode 

Set SPI Fast Read to 100MHz and Dual Read IO mode to speed up
the boot process by over a half second. Also, increase the Normal
Read speed to 33MHz as supported by the W25Q128FW.

BUG=b:70558952
TEST=Run cbmem -t to get boot times.

Change-Id: I616a96526ed90bb4ab0c9c6b78787799faa02633
Signed-off-by: Marc Jones <marc.jones@scarletltd.com>
Reviewed-on: https://review.coreboot.org/25970
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Marc Jones 2018-05-01 14:30:48 -06:00 committed by Martin Roth
parent 12deac1421
commit a44900a24b
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/mainboard/google/kahlee/bootblock/bootblock.c
View File

@ -34,9 +34,17 @@ void bootblock_mainboard_early_init(void)
void bootblock_mainboard_init(void)
{
/*
* W25Q128FW Setup
* Normal Read 40MHz
* Fast Read 104MHz
* Dual Read IO (1-2-2)
*/
sb_read_mode(SPI_READ_MODE_DUAL122);
/* Set SPI speeds before verstage. Needed for TPM */
sb_set_spi100(SPI_SPEED_22M, /* Normal */
SPI_SPEED_66M, /* Fast */
sb_set_spi100(SPI_SPEED_33M, /* Normal */
SPI_SPEED_100M, /* Fast */
SPI_SPEED_66M, /* AltIO */
SPI_SPEED_66M); /* TPM */