board/orangepi: add basic support for orangepi-zero board

This patch adds basic support for orangepi-zero board.
Board support package includes the following components:

- mainline kernel v4.11
- mainline u-boot v2017.03
- extra kernel config options: spidev, spi nor flash, wifi
- dts patches to enable SPI NOR and spidev

More details about this board are available here:
- http://linux-sunxi.org/Orange_Pi_Zero

Note that at the moment networking is not supported right out of the box.
Ethernet submission to mainline kernel is a work in progress, see the
latest dwmac-sun8i branches at https://github.com/montjoie/linux

On-board SDIO WiFi chip XR819 is supported by off-the-tree wireless
driver available at https://github.com/fifteenhex/xradio

Changes from v1:

* Send patch using proper subject
* Update xr819 kernel dts patch: add compatible property

[Peter: fix s/PC/Zero/ typo]
Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/board/orangepi/orangepi-zero/patches/linux/0003-ARM-dts-orange-pi-zero-enable-spidev.patch b/board/orangepi/orangepi-zero/patches/linux/0003-ARM-dts-orange-pi-zero-enable-spidev.patch
new file mode 100644
index 0000000000..553155ce12
--- /dev/null
+++ b/board/orangepi/orangepi-zero/patches/linux/0003-ARM-dts-orange-pi-zero-enable-spidev.patch
@@ -0,0 +1,42 @@
+From 8dd1b2a696bb7e9914abd11cc6f5c0f54c33d626 Mon Sep 17 00:00:00 2001
+From: Sergey Matyukevich <geomatsi@gmail.com>
+Date: Sat, 20 May 2017 15:36:51 +0300
+Subject: [PATCH 3/3] ARM: dts: orange-pi-zero: enable spidev
+
+On orange-pi-zero board SPI1 pins are accessible via GPIO expansion port.
+This patch enables spidev driver for SPI1.
+
+Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
+---
+ arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 11 +++++++++++
+ 1 file changed, 11 insertions(+)
+
+diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
+index cdf19821b1f3..7242aaecb14f 100644
+--- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
++++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
+@@ -59,6 +59,7 @@
+ 		serial0 = &uart0;
+ 		/* ethernet0 is the H3 emac, defined in sun8i-h3.dtsi */
+ 		ethernet1 = &xr819;
++		spi1 = &spi1;
+ 	};
+ 
+ 	chosen {
+@@ -177,3 +178,13 @@
+ 		};
+ 	};
+ };
++
++&spi1 {
++	status = "okay";
++
++	spidev@0 {
++		compatible = "rohm,dh2228fv";
++		reg = <0>;
++		spi-max-frequency = <10000000>;
++	};
++};
+-- 
+2.11.0
+