usb: chipidea: add a flag for turn on vbus early for host

Some usb PHYs need power supply from vbus to make it work, eg mxs-phy, if
there is no vbus, USB PHY will not in correct state when the controller starts
to work, for host, this requires vbus should be turned on before setting port
power(PP) of ehci, to work with this kind of USB PHY design, this patch adds
a flag CI_HDRC_TURN_VBUS_EARLY_ON, can be checked by host driver to turn on
vbus while start host.

Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -32,19 +32,23 @@ static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
 };
 
 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
-	.flags = CI_HDRC_IMX28_WRITE_FIX,
+	.flags = CI_HDRC_IMX28_WRITE_FIX |
+		CI_HDRC_TURN_VBUS_EARLY_ON,
 };
 
 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
-	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
+		CI_HDRC_TURN_VBUS_EARLY_ON,
 };
 
 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
-	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
+		CI_HDRC_TURN_VBUS_EARLY_ON,
 };
 
 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
-	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
+		CI_HDRC_TURN_VBUS_EARLY_ON,
 };
 
 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {

include/linux/usb/chipidea.h

@@ -28,6 +28,7 @@ struct ci_hdrc_platform_data {
 #define CI_HDRC_DUAL_ROLE_NOT_OTG	BIT(4)
 #define CI_HDRC_IMX28_WRITE_FIX		BIT(5)
 #define CI_HDRC_FORCE_FULLSPEED		BIT(6)
+#define CI_HDRC_TURN_VBUS_EARLY_ON	BIT(7)
 	enum usb_dr_mode	dr_mode;
 #define CI_HDRC_CONTROLLER_RESET_EVENT		0
 #define CI_HDRC_CONTROLLER_STOPPED_EVENT	1