USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block

Some SoCs have a single phy-hw-block with multiple phys, this is
modelled by a single phy dts node, so we end up with multiple
controller nodes with a phys property pointing to the phy-node
of the otg-phy.

Only one of these controllers typically is an otg controller, yet we
were checking the first controller who uses a phy from the block and
then end up looking for a dr_mode property in e.g. the ehci controller.

This commit fixes this by adding an arg0 parameter to
of_usb_get_dr_mode_by_phy and make of_usb_get_dr_mode_by_phy
check that this matches the phandle args[0] value when looking for
the otg controller.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h
index de3237fce6b2..5ff9032ee1b4 100644
--- a/include/linux/usb/of.h
+++ b/include/linux/usb/of.h
@@ -12,7 +12,7 @@
 #include <linux/usb/phy.h>
 
 #if IS_ENABLED(CONFIG_OF)
-enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *phy_np);
+enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0);
 bool of_usb_host_tpl_support(struct device_node *np);
 int of_usb_update_otg_caps(struct device_node *np,
                         struct usb_otg_caps *otg_caps);
@@ -20,7 +20,7 @@ struct device_node *usb_of_get_child_node(struct device_node *parent,
                         int portnum);
 #else
 static inline enum usb_dr_mode
-of_usb_get_dr_mode_by_phy(struct device_node *phy_np)
+of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0)
 {
         return USB_DR_MODE_UNKNOWN;
 }