Add an overlay to enable SCIF4 and HSCIF4 on EXIO Connector D, and do
loop testing.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
.../r8a7795-salvator-x-hscif3-hscif4-loop.dtso | 68 ++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 arch/arm64/boot/dts/renesas/r8a7795-salvator-x-hscif3-hscif4-loop.dtso
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x-hscif3-hscif4-loop.dtso b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x-hscif3-hscif4-loop.dtso
new file mode 100644
index 0000000000000000..614334c3376a85fa
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x-hscif3-hscif4-loop.dtso
@@ -0,0 +1,68 @@
+/*
+ * Device Tree Overlay for HSCIF3/HSCIF4 loop on r8a7795/Salvator-X
+ *
+ * Copyright (C) 2016 Glider bvba
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ * EXIO Pinout:
+ * - HSCIF3 TXD = EXIO D pin 30 -> HSCIF4 RXD = EXIO D pin 27
+ * - HSCIF4 TXD = EXIO D pin 21 -> HSCIF3 RXD = EXIO D pin 28
+ */
+
+/dts-v1/ /plugin/;
+
+#include <dt-bindings/clock/r8a7795-cpg-mssr.h>
+
+/ {
+ fragment@0 {
+ target-path = "/aliases";
+
+ __overlay__ {
+ /* serial2 = &hscif3; */
+ serial2 = "/soc/serial@e66a0000";
+ /* serial3 = &hscif4; */
+ serial3 = "/soc/serial@e66b0000";
+ };
+ };
+
+ fragment@1 {
+ target = <&pfc>;
+
+ __overlay__ {
+ hscif3_pins: hscif3 {
+ renesas,groups = "hscif3_data_d";
+ renesas,function = "hscif3";
+ };
+
+ hscif4_pins: hscif4 {
+ renesas,groups = "hscif4_data_b";
+ renesas,function = "hscif4";
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&hscif3>;
+
+ __overlay__ {
+ pinctrl-0 = <&hscif3_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+ };
+ };
+
+ fragment@3 {
+ target = <&hscif4>;
+
+ __overlay__ {
+ pinctrl-0 = <&hscif4_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+ };
+ };
+};
--
1.9.1
