arm64: dts: renesas: salvator-common: Add HSCIF1 device support

This patch adds pin control for HSCIF1, and supports connection with
Debug Serial-1 (CN26) on Salvator boards.

SCIF1 and HSCIF1 are sharing the pins connected to Debug Serial-1 (CN26)
on Salvator boards, and it is necessary to ensure that either SCIF1 or
HSCIF1 is enabled, not both.

As for the default of this DeviceTree, SCIF1 is connected.

Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[geert: Add missing "uart-has-rtscts"]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index 320250d..ce808d3 100644 (file)
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -338,6 +338,15 @@
        clock-frequency = <32768>;
 };
 
+&hscif1 {
+       pinctrl-0 = <&hscif1_pins>;
+       pinctrl-names = "default";
+
+       uart-has-rtscts;
+       /* Please only enable hscif1 or scif1 */
+       /* status = "okay"; */
+};
+
 &hsusb {
        dr_mode = "otg";
        status = "okay";
@@ -543,6 +552,11 @@
                function = "du";
        };
 
+       hscif1_pins: hscif1 {
+               groups = "hscif1_data_a", "hscif1_ctrl_a";
+               function = "hscif1";
+       };
+
        i2c2_pins: i2c2 {
                groups = "i2c2_a";
                function = "i2c2";
@@ -708,6 +722,7 @@
        pinctrl-names = "default";
 
        uart-has-rtscts;
+       /* Please only enable hscif1 or scif1 */
        status = "okay";
 };