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| author | Jett Rink <jettrink@chromium.org> | 2019-11-11 14:48:04 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-11-22 01:55:38 +0000 |
| commit | 2748f2cbe6850d9ec7a307f53b3025924e25bf05 (patch) | |
| tree | c7bb1005aa75f4f3c14b7e64d0e819a9d968ddb6 | |
| parent | e56b201481505f482f90171fa77317fece342d8f (diff) | |
| download | chrome-ec-2748f2cbe6850d9ec7a307f53b3025924e25bf05.tar.gz | |
doc: document USB_PID strategy
We want to have a single USB VID/PID per platform. If we need further
granularity within a platform, then we can use the HW version field
within the AMA VDO.
BRANCH=none
BUG=none
TEST=none
Change-Id: Ia32f8c2b41efc04e570c8f6d92b3e1307948863a
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1910451
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
| -rw-r--r-- | include/config.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/config.h b/include/config.h index 2b071ce8d9..ae331f7fa5 100644 --- a/include/config.h +++ b/include/config.h @@ -3919,7 +3919,14 @@ /* Type-C Fast Role Swap */ #undef CONFIG_USB_TYPEC_PD_FAST_ROLE_SWAP -/* USB Product ID. */ +/* + * USB Product ID. Each platform (e.g. baseboard set) should have a single + * VID/PID combination. If there is a big enough change within a platform, + * then we can differentiate USB topologies by varying the HW version field + * in the Sink and Source Capabilities Extended messages. + * + * To reserve a new PID, use go/usb. + */ #undef CONFIG_USB_PID /* PPC needs to be informed of CC polarity */ |