[PATCH v2 4/4] arm64: dts: rockchip: add Quartz64-A con40 hardware

[Peter Geis <pgwipeout@gmail.com>]

The Quartz64-A has a 40 pin connector that exposes various functions.
Annotate the functions exposed in the device tree.
Enable i2c3, which is pulled up to vcc_3v3 on board.

The following functions are currently exposed:
i2c3
spi1
uart2
uart0
spdif

Signed-off-by: Peter Geis <pgwipeout@gmail.com>
---
 .../boot/dts/rockchip/rk3566-quartz64-a.dts   | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
index c5a79046a9d0..d3dc60ff60dd 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
@@ -449,6 +449,14 @@ regulator-state-mem {
 	};
 };
 
+/* i2c3 is exposed on con40
+ * pin 3 - i2c3_sda_m0, pullup to vcc_3v3
+ * pin 5 - i2c3_scl_m0, pullup to vcc_3v3
+ */
+&i2c3 {
+	status = "okay";
+};
+
 &i2s1_8ch {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2s1m0_sclktx
@@ -559,10 +567,17 @@ &sdmmc1 {
 	status = "okay";
 };
 
+/* spdif is exposed on con40 pin 18 */
 &spdif {
 	status = "okay";
 };
 
+/* spi1 is exposed on con40
+ * pin 11 - spi1_mosi_m1
+ * pin 13 - spi1_miso_m1
+ * pin 15 - spi1_clk_m1
+ * pin 17 - spi1_cs0_m1
+ */
 &spi1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&spi1m1_cs0 &spi1m1_pins>;
@@ -576,6 +591,10 @@ &tsadc {
 	status = "okay";
 };
 
+/* uart0 is exposed on con40
+ * pin 12 - uart0_tx
+ * pin 14 - uart0_rx
+ */
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_xfer>;
@@ -602,6 +621,10 @@ bluetooth {
 	};
 };
 
+/* uart2 is exposed on con40
+ * pin 8 - uart2_tx_m0_debug
+ * pin 10 - uart2_rx_m0_debug
+ */
 &uart2 {
 	status = "okay";
 };
-- 
2.25.1