diff options
author | Caveh Jalali <caveh@google.com> | 2017-06-20 18:20:00 -0700 |
---|---|---|
committer | chrome-bot <chrome-bot@chromium.org> | 2017-06-28 23:23:41 -0700 |
commit | c74c0785927ab7770143d5ff503b4c0ca9df9ff1 (patch) | |
tree | b2a5632f3fd95609aded847a26d1a29bcd4beb75 /include/usb_pd_tcpm.h | |
parent | 3a4298ef4835b1f75046ede8cace149e05089d1a (diff) | |
download | chrome-ec-c74c0785927ab7770143d5ff503b4c0ca9df9ff1.tar.gz |
tcpm: add .release driver operation.
similar to the USB_PD_TCPC case, add release/init operations when the
pd_task enters/leaves the PD_STATE_SUSPENDED state. one use case for
PD_SUSPEND is to get exlusive access to the TCPC for things like
firmware update, so the release/init operation is needed to get the
TCPC and driver into a good state.
updated all tcpm_drv style drivers. for backward compatibility, "old"
drivers that may not handle init/release properly simply return
EC_ERROR_UNIMPLEMENTED for tcpm_release(). pd_task() uses this as a
signal that it should not try to re-init() the driver.
TEST=tested in combination with follow-on CLs to do TCPC firmware
update on electro. also built for kevin, eve, sand which are
some of the other boards using these drivers.
"make buildall -j" passes.
BRANCH=none
BUG=b:35586896
Change-Id: I3d2964a79e710428f7a6e7004d68ab424af85be8
Signed-off-by: Caveh Jalali <caveh@google.com>
Reviewed-on: https://chromium-review.googlesource.com/544660
Reviewed-by: Shawn N <shawnn@chromium.org>
Diffstat (limited to 'include/usb_pd_tcpm.h')
-rw-r--r-- | include/usb_pd_tcpm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/usb_pd_tcpm.h b/include/usb_pd_tcpm.h index fe5d6232e6..3f231fb3f7 100644 --- a/include/usb_pd_tcpm.h +++ b/include/usb_pd_tcpm.h @@ -67,6 +67,16 @@ struct tcpm_drv { int (*init)(int port); /** + * Release the TCPM hardware and disconnect the driver. + * Only .init() can be called after .release(). + * + * @param port Type-C port number + * + * @return EC_SUCCESS or error + */ + int (*release)(int port); + + /** * Read the CC line status. * * @param port Type-C port number |