[PATCH v3] N900: add device tree

[Pavel Machek]

Hi!

> I finally got released by the aliens. It took longer than expected
> and beside a small scar on the back of my neck, I feel pretty OK.

Scars on neck sound scary...

> The order should not matter at all in DT, it should be a static
> representation of the HW, so there is probably something wrong in
> the code that make the device creation order important.

I understand that there's something wrong with the code, but it turned
out not to be easy to debug. Yes, it will have to be debugged some
day, but it happens with old code, too, so it is actually orthogonal
to device tree.

> Beside my comments and the ones from Javier, it looks good.
> If you can repost ASAP, I'll take it right after.
> It will be the first one in the list.

Thanks, here you go.
								Pavel

---

This adds device tree with neccessary support to boot with functional
video (on both emulator and real N900 device).

Signed-off-by: Pavel Machek <pavel at ucw.cz>
Signed-off-by: Aaro Koskinen <aaro.koskinen at iki.fi>

---

>From v1: Aaro wants just GPLv2, so I did that. I re-enabled parts that
can be enabled on 3.10, and tested it on that kernel.

>From v2: spelling, improved comments. Tested on 3.11-rc (0ed4402).

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index a0f2365..c48b1ef 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -162,6 +162,7 @@ dtb-$(CONFIG_ARCH_OMAP2PLUS) += omap2420-h4.dtb \
 	omap3-devkit8000.dtb \
 	omap3-beagle-xm.dtb \
 	omap3-evm.dtb \
+	omap3-n900.dtb \
 	omap3-tobi.dtb \
 	omap3-igep0020.dtb \
 	omap3-igep0030.dtb \
diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
new file mode 100644
index 0000000..7ff90f8
--- /dev/null
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2013 Pavel Machek <pavel at ucw.cz>
+ * Copyright 2013 Aaro Koskinen <aaro.koskinen at iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 (or later) as
+ * published by the Free Software Foundation.
+ */
+
+/dts-v1/;
+
+#include "omap34xx.dtsi"
+
+/ {
+	model = "Nokia N900";
+	compatible = "nokia,omap3-n900", "ti,omap3";
+
+	cpus {
+		cpu at 0 {
+			cpu0-supply = <&vcc>;
+		};
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x10000000>; /* 256 MB */
+	};
+
+};
+
+&i2c1 {
+	clock-frequency = <2200000>;
+
+	twl: twl at 48 {
+		reg = <0x48>;
+		interrupts = <7>; /* SYS_NIRQ cascaded to intc */
+		interrupt-parent = <&intc>;
+	};
+};
+
+#include "twl4030.dtsi"
+
+&twl_gpio {
+	ti,pullups	= <0x0>;
+	ti,pulldowns	= <0x03ff3f>; /* BIT(0..5) | BIT(8..17) */
+};
+
+&i2c2 {
+	clock-frequency = <400000>;
+};
+
+&i2c3 {
+	clock-frequency = <100000>;
+};
+
+&mmc1 {
+	status = "disabled";
+};
+
+&mmc2 {
+	status = "disabled";
+};
+
+&mmc3 {
+	status = "disabled";
+};
+
+&mcspi1 {
+	/*
+	 * For some reason, touchscreen is necessary for screen to work at 
+	 * all on real hw. It works well without it on emulator.
+	 *
+	 * Also... order in the device tree actually matters here.
+	 */
+	tsc2005 at 0 {
+		compatible = "tsc2005";
+		spi-max-frequency = <6000000>;
+		reg = <0>;
+	};
+	mipid at 2 {
+		compatible = "acx565akm";
+		spi-max-frequency = <6000000>;
+		reg = <2>;
+	};
+};
+
+&usb_otg_hs {
+	interface-type = <0>;
+	usb-phy = <&usb2_phy>;
+	mode = <2>;
+	power = <50>;
+};

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html