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usb: typec: update partner power delivery support with opmode

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If USB PD contract is established after creation of the
partner, the power delivery support attribute of the partner
needs to be updated separately. This can be done in
typec_set_pwr_opmode() by checking if the port has already
partner and updating the value if it does.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2017-05-16 15:26:11 +03:00 committed by Greg Kroah-Hartman
parent e6b20121c6
commit 7ee4ce6e93
1 changed files with 19 additions and 0 deletions
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19
drivers/usb/typec/typec.c
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@ -1124,6 +1124,11 @@ void typec_set_vconn_role(struct typec_port *port, enum typec_role role)
}
EXPORT_SYMBOL_GPL(typec_set_vconn_role);
static int partner_match(struct device *dev, void *data)
{
return is_typec_partner(dev);
}
/**
* typec_set_pwr_opmode - Report changed power operation mode
* @port: The USB Type-C Port where the mode was changed
@ -1137,12 +1142,26 @@ EXPORT_SYMBOL_GPL(typec_set_vconn_role);
void typec_set_pwr_opmode(struct typec_port *port,
enum typec_pwr_opmode opmode)
{
struct device *partner_dev;
if (port->pwr_opmode == opmode)
return;
port->pwr_opmode = opmode;
sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
partner_dev = device_find_child(&port->dev, NULL, partner_match);
if (partner_dev) {
struct typec_partner *partner = to_typec_partner(partner_dev);
if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) {
partner->usb_pd = 1;
sysfs_notify(&partner_dev->kobj, NULL,
"supports_usb_power_delivery");
}
put_device(partner_dev);
}
}
EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);