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kevin / gru: Wait to allow ADC 'version' cap to sufficiently charge

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Allow at least 10ms for the 'version' cap to charge in order to have a
voltage on the ADC pin that reflects our voltage divider circuit.

BUG=chrome-os-partner:54768
BRANCH=None
TEST=Manual on kevin. Run 'ver', verify that rev3 board is recognized as
version 3.

Change-Id: I1f3326f4c99a165d77363834d5671aa357a89007
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/357970
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Philip Chen <philipchen@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2016-06-30 17:38:10 -07:00
committed by chrome-bot
parent d1138722dd
commit 4aba826dcf
1 changed files with 1 additions and 1 deletions
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2
board/kevin/board.c
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@@ -313,7 +313,7 @@ int board_get_version(void)
gpio_set_level(GPIO_EC_BOARD_ID_EN_L, 0);
/* Wait to allow cap charge */
msleep(1);
msleep(10);
mv = adc_read_channel(ADC_BOARD_ID);
gpio_set_level(GPIO_EC_BOARD_ID_EN_L, 1);