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| author | Abe Levkoy <alevkoy@chromium.org> | 2020-09-09 11:14:29 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-09-11 05:14:39 +0000 |
| commit | d0ad43dbe419ec86b4c9429f071911205e994826 (patch) | |
| tree | 304c40114d2fc9f201669bd27bc6d3b4d3d3d475 /driver/ppc/syv682x.c | |
| parent | 0757a13425f8f90c089c22265f23903ffe9603f6 (diff) | |
| download | chrome-ec-d0ad43dbe419ec86b4c9429f071911205e994826.tar.gz | |
syv682: Shorten discharge time
This part ignores I2C writes while discharging VBUS. This effectively
elongates transitions out of Attached.SRC by the Type-C state machine to
the amount of time required to discharge VBUS. Mitigate this by
configuring the shortest possible VBUS discharge time (50 ms).
BUG=b:163143427
TEST=Connect Volteer C1 to Volteer C1; observe stable Attached states
BRANCH=none
Signed-off-by: Abe Levkoy <alevkoy@chromium.org>
Change-Id: I072888f9ac8d3d06321872a237d9848688eced55
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2401583
Reviewed-by: Jett Rink <jettrink@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'driver/ppc/syv682x.c')
| -rw-r--r-- | driver/ppc/syv682x.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/driver/ppc/syv682x.c b/driver/ppc/syv682x.c index 53534279fc..0ea005051f 100644 --- a/driver/ppc/syv682x.c +++ b/driver/ppc/syv682x.c @@ -650,7 +650,7 @@ static int syv682x_init(int port) * voltage, and thermal shutdown */ regval = (SYV682X_OC_DELAY_10MS << SYV682X_OC_DELAY_SHIFT) - | (SYV682X_DSG_TIME_200MS << SYV682X_DSG_TIME_SHIFT) + | (SYV682X_DSG_TIME_50MS << SYV682X_DSG_TIME_SHIFT) | (SYV682X_DSG_RON_200_OHM << SYV682X_DSG_RON_SHIFT) | SYV682X_CONTROL_2_SDSG; rv = write_reg(port, SYV682X_CONTROL_2_REG, regval); |