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arm64: dts: allwinner: pine64: Prepare optional UART nodes with pinctrl 

Pine64 exposes all A64 UARTs, not just UART0.

Since the pins can be used as GPIO, don't enable the new UART nodes by
default, but prepare the pinctrl settings to aid in activating them via
overlays, i.e., overriding the status property of &uartX nodes.

For UART4 (Euler) the safer route of not including RTS/CTS pins is chosen,
whereas for UART1 (Bluetooth) they are included.

Add the corresponding pinctrl nodes where missing.

Suggested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
hifive-unleashed-5.1
Andreas Färber 2017-04-18 21:25:38 +02:00 committed by Maxime Ripard
parent 3b38fded38
commit 2273aa1691
2 changed files with 44 additions and 0 deletions
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29
arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts
View File

@ -107,12 +107,41 @@
status = "okay";
};
/* On Exp and Euler connectors */
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins_a>;
status = "okay";
};
/* On Wifi/BT connector, with RTS/CTS */
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
status = "disabled";
};
/* On Pi-2 connector */
&uart2 {
pinctrl-names = "default";
pinctrl-0 = <&uart2_pins>;
status = "disabled";
};
/* On Euler connector */
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&uart3_pins>;
status = "disabled";
};
/* On Euler connector, RTS/CTS optional */
&uart4 {
pinctrl-names = "default";
pinctrl-0 = <&uart4_pins>;
status = "disabled";
};
&usb_otg {
dr_mode = "host";
status = "okay";

15
arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
View File

@ -322,6 +322,21 @@
pins = "PB0", "PB1";
function = "uart2";
};
uart3_pins: uart3-pins {
pins = "PD0", "PD1";
function = "uart3";
};
uart4_pins: uart4-pins {
pins = "PD2", "PD3";
function = "uart4";
};
uart4_rts_cts_pins: uart4-rts-cts-pins {
pins = "PD4", "PD5";
function = "uart4";
};
};
uart0: serial@1c28000 {