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authorSimon Glass <sjg@chromium.org>2016-08-27 15:03:02 -0600
committerPatrick Georgi <pgeorgi@google.com>2016-10-06 21:49:25 +0200
commitaa58a9eebfc1a60ccc614ef6a064cf0ffce1c114 (patch)
tree3628144a13f7417f41db38087428bb7079944571 /src/arch/arm
parentdd42db63489d2a2021f40aec894b1eded62e9a04 (diff)
spi: Add a way to show SPI transfer speed for reads
SPI read speed directly impacts boot time and we do quite a lot of reading. Add a way to easily find out the speed of SPI flash reads within coreboot. Write speed is less important since there are very few writes and they are small. BUG=chrome-os-partner:56556 BRANCH=none TEST=run on gru with SPI_SPEED_DEBUG set to 1. See the output messages: read SPI 627d4 7d73: 18455 us, 1740 KB/s, 13.920 Mbps Change-Id: Id3814bd2b7bd045cdfcc67eb1fabc861bf9ed3b2 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 82cb93f6be47efce3b0a3843bab89d2381baef89 Original-Change-Id: Iec66f5b8e3ad62f14d836a538dc7801e4ca669e7 Original-Signed-off-by: Simon Glass <sjg@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/376944 Original-Commit-Ready: Julius Werner <jwerner@chromium.org> Original-Tested-by: Simon Glass <sjg@google.com> Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/16701 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
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