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| author | Karthikeyan Ramasubramanian <kramasub@chromium.org> | 2018-12-19 14:01:42 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-01-08 14:33:35 -0800 |
| commit | 9e4474e561ec165cf24e8aa249c2aeeed8e7f1ef (patch) | |
| tree | bc5e884a87efd1b852945c37f90ee0e8518a2d69 /include/i2c.h | |
| parent | a3a17f0013e294b9b9496d78b9b2ab6cefa45270 (diff) | |
| download | chrome-ec-9e4474e561ec165cf24e8aa249c2aeeed8e7f1ef.tar.gz | |
i2c_master: Protect TCPC I2C tunnels as part of EC_REBOOT_DISABLE_JUMP
Currently EC keeps the I2C tunnels open enabling depthcharge to perform
firmware update on those ports. Once the firmware update is done,
depthcharge triggers a command to protect the I2C tunnels. But not all TCPC
ports are registered for firmware update in depthcharge. This causes
some I2C tunnels to be left unprotected.
Update EC to protect all the TCPC I2C tunnels when depthcharge invokes
EC_REBOOT_DISABLE_JUMP command. This usually happens when the EC
software sync is complete and the control jumps to OS. Also protect the
TCPC I2C tunnels only when the WP is enabled.
BUG=b:119130829
BRANCH=octopus
TEST=make -j buildall && Boot to ChromeOS and ensure that the TCPC I2C
tunnels are protected.
Change-Id: Ice681038bbf725b3aa44b13ff71724937c6045e9
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1390944
Commit-Ready: Karthikeyan Ramasubramanian <kramasub@chromium.org>
Tested-by: Karthikeyan Ramasubramanian <kramasub@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'include/i2c.h')
| -rw-r--r-- | include/i2c.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 1dcfe46332..bb7f28000d 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -392,4 +392,9 @@ void i2c_start_xfer_notify(int port, int slave_addr); */ void i2c_end_xfer_notify(int port, int slave_addr); +/** + * Function to protect I2C port/tunnel. This is invoked either when through + * host command or when sys_jump is disabld. + */ +void i2c_passthru_protect_port(uint32_t port); #endif /* __CROS_EC_I2C_H */ |