WORKAROUND: clk: qcom: gcc-sa8775p: Use PWRSTS_RET_ON for USB GDSCs

The USB GDSCs on SA8775P are currently configured with PWRSTS_OFF_ON,
which allows the GDSC framework to fully collapse these power domains
during gdsc_disable(). When these GDSCs collapse, the corresponding USB
PHY configurations are not retained in USB host mode use-cases and this
breaks the resume of USB controller from suspend.

To avoid this, configure the USB GDSC power states to PWRSTS_RET_ON. This
prevents the GDSC from powering off during gdsc_disable(), and allows
hardware to retain the PHY configurations across USB host mode use-cases.

Signed-off-by: Imran Shaik <imran.shaik@oss.qualcomm.com>

Author: imrashai

drivers/clk/qcom/gcc-sa8775p.c

@@ -4261,7 +4261,7 @@ static struct gdsc usb20_prim_gdsc = {
 	.pd = {
 		.name = "usb20_prim_gdsc",
 	},
-	.pwrsts = PWRSTS_OFF_ON,
+	.pwrsts = PWRSTS_RET_ON,
 	.flags = RETAIN_FF_ENABLE | POLL_CFG_GDSCR,
 };
 
@@ -4273,7 +4273,7 @@ static struct gdsc usb30_prim_gdsc = {
 	.pd = {
 		.name = "usb30_prim_gdsc",
 	},
-	.pwrsts = PWRSTS_OFF_ON,
+	.pwrsts = PWRSTS_RET_ON,
 	.flags = RETAIN_FF_ENABLE | POLL_CFG_GDSCR,
 };
 
@@ -4285,7 +4285,7 @@ static struct gdsc usb30_sec_gdsc = {
 	.pd = {
 		.name = "usb30_sec_gdsc",
 	},
-	.pwrsts = PWRSTS_OFF_ON,
+	.pwrsts = PWRSTS_RET_ON,
 	.flags = RETAIN_FF_ENABLE | POLL_CFG_GDSCR,
 };