[4.18,REGRESSION,fix,1/2] typec: tcpm: Correctly report power_supply current and voltage for non pd supply

[Hans de Goede <hdegoede@redhat.com>]

Commit f2a8aa053c17 ("typec: tcpm: Represent source supply through
power_supply") moved the code to register a power_supply representing
the device supplying power to the type-C connector, from the fusb302
code to the generic tcpm code so that we have a psy reporting the
supply voltage and current for all tcpm devices.

This broke the reporting of current and voltage through the psy interface
when supplied by a a non pd supply (5V, current as reported by
get_current_limit). The cause of this breakage is port->supply_voltage
and port->current_limit not being set in that case.

This commit fixes this by setting port->supply_voltage and
port->current_limit from tcpm_set_current_limit().

This commit also removes setting supply_voltage and current_limit
from tcpm_reset_port() as that calls tcpm_set_current_limit(0, 0)
which now already sets these to 0.

Fixes: f2a8aa053c17 ("typec: tcpm: Represent source supply through...")
Cc: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/usb/typec/tcpm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index 8a201dd53d36..316959c26db9 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -724,6 +724,9 @@ static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
 
 	tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
 
+	port->supply_voltage = mv;
+	port->current_limit = max_ma;
+
 	if (port->tcpc->set_current_limit)
 		ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
 
@@ -2594,8 +2597,6 @@ static void tcpm_reset_port(struct tcpm_port *port)
 	tcpm_set_attached_state(port, false);
 	port->try_src_count = 0;
 	port->try_snk_count = 0;
-	port->supply_voltage = 0;
-	port->current_limit = 0;
 	port->usb_type = POWER_SUPPLY_USB_TYPE_C;
 
 	power_supply_changed(port->psy);