diff options
| author | Saranya Gopal <saranya.gopal@intel.com> | 2023-02-14 17:15:43 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-15 19:03:47 +0100 |
| commit | c620f4d5b25bcbb851daa1f88edc764cf5f29cb6 (patch) | |
| tree | a7dba1db8cee1bc4c77a1ee27827efd3dc5c07aa | |
| parent | e4e7b2dc27c4bb877d850eaff69d41410b2f4237 (diff) | |
usb: typec: pd: Add higher capability sysfs for sink PDO
28th bit of fixed supply sink PDO represents higher capability.
When this bit is set, the sink device needs more than vsafe5V
(eg: 12 V) to provide full functionality. This patch adds
this higher capability sysfs interface for sink PDO.
28th bit of fixed supply source PDO represents usb_suspend_supported
attribute. This usb_suspend_supported sysfs is already exposed for
source PDOs. This patch adds 'source-capabilities' in
usb_suspend_supported sysfs documentation for additional clarity.
Signed-off-by: Saranya Gopal <saranya.gopal@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20230214114543.205103-2-saranya.gopal@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-usb_power_delivery | 11 | ||||
| -rw-r--r-- | drivers/usb/typec/pd.c | 8 |
2 files changed, 18 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-usb_power_delivery b/Documentation/ABI/testing/sysfs-class-usb_power_delivery index ce2b1b563cb3..1bf9d1d7902c 100644 --- a/Documentation/ABI/testing/sysfs-class-usb_power_delivery +++ b/Documentation/ABI/testing/sysfs-class-usb_power_delivery @@ -69,7 +69,7 @@ Description: This file contains boolean value that tells does the device support both source and sink power roles. -What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/usb_suspend_supported +What: /sys/class/usb_power_delivery/.../source-capabilities/1:fixed_supply/usb_suspend_supported Date: May 2022 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com> Description: @@ -78,6 +78,15 @@ Description: will follow the USB 2.0 and USB 3.2 rules for suspend and resume. +What: /sys/class/usb_power_delivery/.../sink-capabilities/1:fixed_supply/higher_capability +Date: February 2023 +Contact: Saranya Gopal <saranya.gopal@linux.intel.com> +Description: + This file shows the value of the Higher capability bit in + vsafe5V Fixed Supply Object. If the bit is set, then the sink + needs more than vsafe5V(eg. 12 V) to provide full functionality. + Valid values: 0, 1 + What: /sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/unconstrained_power Date: May 2022 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com> diff --git a/drivers/usb/typec/pd.c b/drivers/usb/typec/pd.c index b5ab26422c34..59c537a5e600 100644 --- a/drivers/usb/typec/pd.c +++ b/drivers/usb/typec/pd.c @@ -49,6 +49,13 @@ usb_suspend_supported_show(struct device *dev, struct device_attribute *attr, ch static DEVICE_ATTR_RO(usb_suspend_supported); static ssize_t +higher_capability_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_HIGHER_CAP)); +} +static DEVICE_ATTR_RO(higher_capability); + +static ssize_t unconstrained_power_show(struct device *dev, struct device_attribute *attr, char *buf) { return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_EXTPOWER)); @@ -161,6 +168,7 @@ static struct device_type source_fixed_supply_type = { static struct attribute *sink_fixed_supply_attrs[] = { &dev_attr_dual_role_power.attr, + &dev_attr_higher_capability.attr, &dev_attr_unconstrained_power.attr, &dev_attr_usb_communication_capable.attr, &dev_attr_dual_role_data.attr, |