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>
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index 1d7e4f5..c69a591 100644
--- a/arch/arm/boot/dts/bcm2835.dtsi
+++ b/arch/arm/boot/dts/bcm2835.dtsi
@@ -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>;