i2c: pnx: add device tree support

This patch adds device tree support to the pnx-i2c driver by using platform
resources for memory region and irq and removing dependency on mach includes.

The following platforms are affected:

* PNX
* LPC31xx (WIP)
* LPC32xx

The patch is based on a patch by Jon Smirl, working on lpc31xx integration

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>

1 files changed, 36 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/i2c/pnx.txt b/Documentation/devicetree/bindings/i2c/pnx.txt
new file mode 100644
index 000000000000..fe98ada33ee4
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/pnx.txt
@@ -0,0 +1,36 @@
+* NXP PNX I2C Controller
+
+Required properties:
+
+ - reg: Offset and length of the register set for the device
+ - compatible: should be "nxp,pnx-i2c"
+ - interrupts: configure one interrupt line
+ - #address-cells: always 1 (for i2c addresses)
+ - #size-cells: always 0
+ - interrupt-parent: the phandle for the interrupt controller that
+   services interrupts for this device.
+
+Optional properties:
+
+ - clock-frequency: desired I2C bus clock frequency in Hz, Default: 100000 Hz
+
+Examples:
+
+        i2c1: i2c@400a0000 {
+                compatible = "nxp,pnx-i2c";
+                reg = <0x400a0000 0x100>;
+                interrupt-parent = <&mic>;
+                interrupts = <51 0>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+        };
+
+        i2c2: i2c@400a8000 {
+                compatible = "nxp,pnx-i2c";
+                reg = <0x400a8000 0x100>;
+                interrupt-parent = <&mic>;
+                interrupts = <50 0>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                clock-frequency = <100000>;
+        };