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authorMarc Jones <marc.jones@scarletltd.com>2018-05-01 14:30:48 -0600
committerMartin Roth <martinroth@google.com>2018-05-02 20:49:20 +0000
commita44900a24ba1c6730caaa8940b01de2dcccebe3e (patch)
tree2354011b26c3e394bc50b0b6f4dc34ae1d700ddd
parent12deac1421b4832b8a63da8dea5da7f5d11ea263 (diff)
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>
-rw-r--r--src/mainboard/google/kahlee/bootblock/bootblock.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/src/mainboard/google/kahlee/bootblock/bootblock.c b/src/mainboard/google/kahlee/bootblock/bootblock.c
index 577c105f9e..aac1d955d9 100644
--- a/src/mainboard/google/kahlee/bootblock/bootblock.c
+++ b/src/mainboard/google/kahlee/bootblock/bootblock.c
@@ -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 */