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Commit 232fed48 authored Dec 31, 2012 by Stephen Warren

ARM: bcm2835: add I2C controllers to DT



The BCM2835 has 3 identical I2C controllers. Instantiate them all in the
SoC .dtsi file, and enable the relevant two in the Raspberry Pi board
.dts file.

Note that on the Raspberry Pi Model B revision 1, I2C0 is connected to
the general-purpose expansion header, and I2C1 is connected to the camera
connector. Revision 2 of the board swaps these assignments:-(

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>

parent 5186bf28

arch/arm/boot/dts/bcm2835-rpi-b.dts

+10 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,16 @@
		};
		};

		&i2c0 {
		status = "okay";
		clock-frequency = <100000>;
		};

		&i2c1 {
		status = "okay";
		clock-frequency = <100000>;
		};

		&sdhci {
		status = "okay";
		bus-width = <4>;

arch/arm/boot/dts/bcm2835.dtsi

+22 −0

Original line number	Diff line number	Diff line
		@@ -64,6 +64,22 @@
		#interrupt-cells = <2>;
		};

		i2c0: i2c@20205000 {
		compatible = "brcm,bcm2835-i2c";
		reg = <0x7e205000 0x1000>;
		interrupts = <2 21>;
		clocks = <&clk_i2c>;
		status = "disabled";
		};

		i2c1: i2c@20804000 {
		compatible = "brcm,bcm2835-i2c";
		reg = <0x7e804000 0x1000>;
		interrupts = <2 21>;
		clocks = <&clk_i2c>;
		status = "disabled";
		};

		sdhci: sdhci {
		compatible = "brcm,bcm2835-sdhci";
		reg = <0x7e300000 0x100>;
		@@ -73,6 +89,12 @@
		};
		};

		clk_i2c: clock {
		compatible = "fixed-clock";
		#clock-cells = <0>;
		clock-frequency = <150000000>;
		};

		clk_mmc: clock {
		compatible = "fixed-clock";
		#clock-cells = <0>;