diff options
| author | Martin Roth <martinroth@google.com> | 2018-06-07 09:00:22 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-06-08 16:12:54 +0000 |
| commit | 6985a7b7d6367b4aae3f5c03290f19feea7580f0 (patch) | |
| tree | 802693690e10448d9067a8760fcd73af3964f00f | |
| parent | 82e8c69a56dbb9d16631a77b7971977800913af7 (diff) | |
| download | coreboot-6985a7b7d6367b4aae3f5c03290f19feea7580f0.tar.xz | |
mainboard/google/kahlee: Use 66MHz SPI clock for fast read
Looking at the 100MHz signal, we were violating the timing requirements.
66MHz still isn't great, but it's a good tradeoff between improving
the signal and losing boot speed time.
This slows down the boot time by about 20mS.
BUG=b:109583457
TEST=Boot grunt, look at signal on scope
Change-Id: I7ce70c992822dd17c5877226e74c1890660768c6
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/26950
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
| -rw-r--r-- | src/mainboard/google/kahlee/bootblock/bootblock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mainboard/google/kahlee/bootblock/bootblock.c b/src/mainboard/google/kahlee/bootblock/bootblock.c index 8f124b36ff..7e6524d1d5 100644 --- a/src/mainboard/google/kahlee/bootblock/bootblock.c +++ b/src/mainboard/google/kahlee/bootblock/bootblock.c @@ -44,7 +44,7 @@ void bootblock_mainboard_init(void) /* Set SPI speeds before verstage. Needed for TPM */ sb_set_spi100(SPI_SPEED_33M, /* Normal */ - SPI_SPEED_100M, /* Fast */ + SPI_SPEED_66M, /* Fast */ SPI_SPEED_66M, /* AltIO */ SPI_SPEED_66M); /* TPM */ |