arm64: dts: renesas: r8a7795: salvator-xs: enable usb2_phy3 node

This patch enables usb2_phy3 node for r8a7795 with Salvator-XS.
You must change the SW31 to OFF-OFF-ON-ON-ON-ON on the board.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
index 8367668..622b2a2 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts
@@ -145,6 +145,23 @@
                groups = "usb2";
                function = "usb2";
        };
+
+       /*
+        * - On Salvator-X[S], GP6_3[01] are connected to ADV7482 as irq pins
+        *   (when SW31 is the default setting on Salvator-XS).
+        * - If SW31 is the default setting, you cannot use USB2.0 ch3 on
+        *   r8a7795 with Salvator-XS.
+        *   Hence the SW31 setting must be changed like 2) below.
+        *   1) Default setting of SW31: ON-ON-OFF-OFF-OFF-OFF:
+        *      - Connect GP6_3[01] to ADV7842.
+        *   2) Changed setting of SW31: OFF-OFF-ON-ON-ON-ON:
+        *      - Connect GP6_3[01] to BD082065 (USB2.0 ch3's host power).
+        *      - Connect GP6_{04,21} to ADV7842.
+        */
+       usb2_ch3_pins: usb2_ch3 {
+               groups = "usb2_ch3";
+               function = "usb2_ch3";
+       };
 };
 
 &usb2_phy2 {
@@ -153,3 +170,10 @@
 
        status = "okay";
 };
+
+&usb2_phy3 {
+       pinctrl-0 = <&usb2_ch3_pins>;
+       pinctrl-names = "default";
+
+       status = "okay";
+};