[PATCH] ARM: dts: zynq: Add support for Z-turn Lite board

[PATCH] ARM: dts: zynq: Add support for Z-turn Lite board

[Joni Lepistö]

Add a dts for MYIR Z-turn Lite and respective target in Makefile
based on the existing Z-turn dts which is compatible except for
memory size.

Signed-off-by: Joni Lepistö <joni.m.lepisto@gmail.com>
---
 arch/arm/boot/dts/Makefile            |   1 +
 arch/arm/boot/dts/zynq-zturn-lite.dts | 115 ++++++++++++++++++++++++++
 2 files changed, 116 insertions(+)
 create mode 100644 arch/arm/boot/dts/zynq-zturn-lite.dts

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index d6546d2676b9..56b1bce92744 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -1241,6 +1241,7 @@ dtb-$(CONFIG_ARCH_ZYNQ) += \
 	zynq-zc770-xm013.dtb \
 	zynq-zed.dtb \
 	zynq-zturn.dtb \
+	zynq-zturn-lite.dtb \
 	zynq-zybo.dtb \
 	zynq-zybo-z7.dtb
 dtb-$(CONFIG_MACH_ARMADA_370) += \
diff --git a/arch/arm/boot/dts/zynq-zturn-lite.dts b/arch/arm/boot/dts/zynq-zturn-lite.dts
new file mode 100644
index 000000000000..96c0babe8267
--- /dev/null
+++ b/arch/arm/boot/dts/zynq-zturn-lite.dts
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2015 Andrea Merello <adnrea.merello@gmail.com>
+ *  Copyright (C) 2017 Alexander Graf <agraf@suse.de>
+ *  Copyright (C) 2020 Joni Lepistö <joni.m.lepisto@gmail.com>
+ *
+ *  Based on zynq-zed.dts which is:
+ *  Copyright (C) 2011 - 2014 Xilinx
+ *  Copyright (C) 2012 National Instruments Corp.
+ *
+ */
+
+/dts-v1/;
+/include/ "zynq-7000.dtsi"
+
+/ {
+	model = "Zynq Z-Turn Lite MYIR Board";
+	compatible = "myir,zynq-zturn-lite", "xlnx,zynq-7000";
+
+	aliases {
+		ethernet0 = &gem0;
+		serial0 = &uart1;
+		serial1 = &uart0;
+		mmc0 = &sdhci0;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x20000000>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+		usr-led1 {
+			label = "usr-led1";
+			gpios = <&gpio0 0x0 0x1>;
+			default-state = "off";
+		};
+
+		usr-led2 {
+			label = "usr-led2";
+			gpios = <&gpio0 0x9 0x1>;
+			default-state = "off";
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		autorepeat;
+		K1 {
+			label = "K1";
+			gpios = <&gpio0 0x32 0x1>;
+			linux,code = <0x66>;
+			wakeup-source;
+			autorepeat;
+		};
+	};
+};
+
+&clkc {
+	ps-clk-frequency = <33333333>;
+};
+
+&gem0 {
+	status = "okay";
+	phy-mode = "rgmii-id";
+	phy-handle = <&ethernet_phy>;
+
+	ethernet_phy: ethernet-phy@0 {
+		reg = <0x0>;
+	};
+};
+
+&sdhci0 {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+	dr_mode = "host";
+};
+
+&can0 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+	clock-frequency = <400000>;
+
+	stlm75@49 {
+		status = "okay";
+		compatible = "lm75";
+		reg = <0x49>;
+	};
+
+	accelerometer@53 {
+		compatible = "adi,adxl345", "adxl345", "adi,adxl34x", "adxl34x";
+		reg = <0x53>;
+		interrupt-parent = <&intc>;
+		interrupts = <0x0 0x1e 0x4>;
+	};
+};
-- 
2.20.1

Re: [PATCH] ARM: dts: zynq: Add support for Z-turn Lite board

[Michal Simek]

On 26. 02. 20 10:03, Joni Lepistö wrote:
> Add a dts for MYIR Z-turn Lite and respective target in Makefile
> based on the existing Z-turn dts which is compatible except for
> memory size.

Just a side note - I can't see any reason to duplicate the whole dts
file if it is just the same - you can simply #include "zynq-zturn.dts"
and then change/rewrite things.

Second thing is that myir,zynq-zturn is not even listed in any yaml
binding file that's why dtbs_check will fail.

I expect you use standard boot flow via u-boot which can detect and
update memory size automatically for you. It means for kernel you can
even place there <0 0> and u-boot will fill it.

Just a summary I don't think it is worth to add support to this board in
Linux. And in U-Boot you should enable memory autodetection and you will
get support for this lite board for free.

Thanks,
Michal