From 7ee4ce6e933fbb2e5db2c39977b847704589575e Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Tue, 16 May 2017 15:26:11 +0300 Subject: [PATCH] usb: typec: update partner power delivery support with opmode 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 Reviewed-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/typec.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/usb/typec/typec.c b/drivers/usb/typec/typec.c index db5ee730ad24..1a6822ee1a52 100644 --- a/drivers/usb/typec/typec.c +++ b/drivers/usb/typec/typec.c @@ -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); -- 2.39.5