diff options
| author |   Badhri Jagan Sridharan <badhri@google.com> | 2021-05-17 12:21:11 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-21 20:05:56 +0200 |
| commit | 59d4d06c8ab0375dcc4bab329e6ecd44dd46373e (patch) | |
| tree | 8eb341a311b8787d90f2f145fbded200d549a71c /include/linux/usb | |
| parent | usb: typec: tcpm: Refactor logic to enable/disable auto vbus dicharge (diff) | |
| download | linux-dev-59d4d06c8ab0375dcc4bab329e6ecd44dd46373e.tar.xz linux-dev-59d4d06c8ab0375dcc4bab329e6ecd44dd46373e.zip | |
usb: typec: tcpm: Move TCPC to APPLY_RC state during PR_SWAP
When vbus auto discharge is enabled, TCPCI based TCPC transitions
into Attached.SNK/Attached.SRC state. During PR_SWAP, TCPCI based
TCPC would disconnect when partner changes power roles. TCPC has
to be moved APPLY RC state during PR_SWAP. This is done by
ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and
POWER_CONTROL.AutodischargeDisconnect is 0. Once the swap sequence
is done, AutoDischargeDisconnect is re-enabled.
Fixes: f321a02caebd ("usb: typec: tcpm: Implement enabling Auto Discharge disconnect support")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210517192112.40934-3-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/tcpm.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h index 42fcfbe10590..bffc8d3e14ad 100644 --- a/include/linux/usb/tcpm.h +++ b/include/linux/usb/tcpm.h @@ -66,6 +66,8 @@ enum tcpm_transmit_type { * For example, some tcpcs may include BC1.2 charger detection * and use that in this case. * @set_cc: Called to set value of CC pins + * @apply_rc: Optional; Needed to move TCPCI based chipset to APPLY_RC state + * as stated by the TCPCI specification. * @get_cc: Called to read current CC pin values * @set_polarity: * Called to set polarity @@ -120,6 +122,8 @@ struct tcpc_dev { int (*get_vbus)(struct tcpc_dev *dev); int (*get_current_limit)(struct tcpc_dev *dev); int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc); + int (*apply_rc)(struct tcpc_dev *dev, enum typec_cc_status cc, + enum typec_cc_polarity polarity); int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1, enum typec_cc_status *cc2); int (*set_polarity)(struct tcpc_dev *dev, |