ARM: i.MX21 clk: Add devicetree support

This patch adds devicetree support CCM module for i.MX21 CPUs.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/imx21-clock.txt b/Documentation/devicetree/bindings/clock/imx21-clock.txt
new file mode 100644
index 000000000000..c3b0db437c48
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/imx21-clock.txt
@@ -0,0 +1,28 @@
+* Clock bindings for Freescale i.MX21
+
+Required properties:
+- compatible  : Should be "fsl,imx21-ccm".
+- reg         : Address and length of the register set.
+- interrupts  : Should contain CCM interrupt.
+- #clock-cells: Should be <1>.
+
+The clock consumer should specify the desired clock by having the clock
+ID in its "clocks" phandle cell. See include/dt-bindings/clock/imx21-clock.h
+for the full list of i.MX21 clock IDs.
+
+Examples:
+        clks: ccm@10027000{
+                compatible = "fsl,imx21-ccm";
+                reg = <0x10027000 0x800>;
+                #clock-cells = <1>;
+        };
+
+        uart1: serial@1000a000 {
+                compatible = "fsl,imx21-uart";
+                reg = <0x1000a000 0x1000>;
+                interrupts = <20>;
+                clocks = <&clks IMX21_CLK_UART1_IPG_GATE>,
+                         <&clks IMX21_CLK_PER1>;
+                clock-names = "ipg", "per";
+                status = "disabled";
+        };