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flash_ec: Add 1s delay after turning on SPI VREF.

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On zoombini, we were taking enough power that the voltage dipped for a
little bit.  This commit adds a 1 second delay after applying SPI VREF
but before actually flashing the EC.

BUG=b:65694390
BRANCH=None
TEST=`./util/flash_ec --board zoombini` still works.

Change-Id: I431cbfcc569fd5369971b06dedb85e8d5fdb9a32
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/722354
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
This commit is contained in:
Aseda Aboagye
2017-10-16 18:09:29 -07:00
committed by chrome-bot
parent 7501654d20
commit 8f3f0c0807
1 changed files with 7 additions and 0 deletions
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7
util/flash_ec
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@@ -602,6 +602,13 @@ function flash_flashrom() {
# Servo micro doesn't support this control.
dut_control spi1_buf_on_flex_en:on
fi
# b/65694390: Zoombini takes enough power that when flashing
# without power, the SPI Vref voltage dips for a little bit.
# Therefore, wait 1 second to let the voltage stabilize.
if [[ "${BOARD}" == "zoombini" ]]; then
sleep 1
fi
else
# Temp layout
L=/tmp/flash_spi_layout_$$