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authorStephen Warren <swarren@wwwdotorg.org>2012-12-31 23:26:45 -0700
committerStephen Warren <swarren@wwwdotorg.org>2013-01-14 21:47:09 -0700
commit232fed4825e832c89b1d47a24c7836918063fb3e (patch)
tree2574ab574e31faaf19e2dc9aa6c4de4ebc0bc356 /arch
parent5186bf287aa4393b78c36f548d9b06001046b65e (diff)
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/boot/dts/bcm2835-rpi-b.dts10
-rw-r--r--arch/arm/boot/dts/bcm2835.dtsi22
2 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts
index 0544ef860623..aafda174a605 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts
@@ -25,6 +25,16 @@
};
};
+&i2c0 {
+ status = "okay";
+ clock-frequency = <100000>;
+};
+
+&i2c1 {
+ status = "okay";
+ clock-frequency = <100000>;
+};
+
&sdhci {
status = "okay";
bus-width = <4>;
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index 1d7e4f5c0b1e..c69a591631b8 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>;