The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 86629e098a077922438efa98dc80917604dfd317 Mon Sep 17 00:00:00 2001

From: Badhri Jagan Sridharan badhri@google.com Date: Wed, 17 Mar 2021 11:12:48 -0700 Subject: [PATCH] usb: typec: tcpm: Invoke power_supply_changed for tcpm-source-psy-

tcpm-source-psy- does not invoke power_supply_changed API when one of the published power supply properties is changed. power_supply_changed needs to be called to notify userspace clients(uevents) and kernel clients.

Fixes: f2a8aa053c176 ("typec: tcpm: Represent source supply through power_supply") Reviewed-by: Guenter Roeck linux@roeck-us.net Reviewed-by: Heikki Krogerus heikki.krogerus@linux.intel.com Signed-off-by: Badhri Jagan Sridharan badhri@google.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20210317181249.1062995-1-badhri@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index be0b6469dd3d..92093ea12cff 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -942,6 +942,7 @@ static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)

port->supply_voltage = mv; port->current_limit = max_ma; + power_supply_changed(port->psy);

if (port->tcpc->set_current_limit) ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv); @@ -2928,6 +2929,7 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,

port->pps_data.supported = false; port->usb_type = POWER_SUPPLY_USB_TYPE_PD; + power_supply_changed(port->psy);

/* * Select the source PDO providing the most power which has a @@ -2952,6 +2954,7 @@ static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, port->pps_data.supported = true; port->usb_type = POWER_SUPPLY_USB_TYPE_PD_PPS; + power_supply_changed(port->psy); } continue; default: @@ -3109,6 +3112,7 @@ static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port) port->pps_data.out_volt)); port->pps_data.op_curr = min(port->pps_data.max_curr, port->pps_data.op_curr); + power_supply_changed(port->psy); }

return src_pdo; @@ -3344,6 +3348,7 @@ static int tcpm_set_charge(struct tcpm_port *port, bool charge) return ret; } port->vbus_charge = charge; + power_supply_changed(port->psy); return 0; }

@@ -3523,6 +3528,7 @@ static void tcpm_reset_port(struct tcpm_port *port) port->try_src_count = 0; port->try_snk_count = 0; port->usb_type = POWER_SUPPLY_USB_TYPE_C; + power_supply_changed(port->psy); port->nr_sink_caps = 0; port->sink_cap_done = false; if (port->tcpc->enable_frs) @@ -5905,7 +5911,7 @@ static int tcpm_psy_set_prop(struct power_supply *psy, ret = -EINVAL; break; } - + power_supply_changed(port->psy); return ret; }

@@ -6058,6 +6064,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) err = devm_tcpm_psy_register(port); if (err) goto out_role_sw_put; + power_supply_changed(port->psy);

port->typec_port = typec_register_port(port->dev, &port->typec_caps); if (IS_ERR(port->typec_port)) {