MLK-14439-4 rpmsg: imx: setup the imx rpmsg driver

- move imx_rpmsg from arch/arm/ to drivers/rpmsg.
- use the new MU generic APIs in the rpmsg implementation.
- Validated the pingpong test on both imx6sx and imx7d sdb boards.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/rpmsg/imx-rpmsg.txt b/Documentation/devicetree/bindings/rpmsg/imx-rpmsg.txt
new file mode 100644
index 000000000000..27d710274ec3
--- /dev/null
+++ b/Documentation/devicetree/bindings/rpmsg/imx-rpmsg.txt
@@ -0,0 +1,19 @@
+i.MX RPMSG platform implementations
+
+Required properties:
+- compatible : "fsl,imx7d-rpmsg", "fsl,imx6sx-rpmsg"
+- vdev-nums : The number of the remote virtual devices.
+- reg : The reserved DDR phisical memory used to store
+  vring descriptors.
+
+Example:
+rpmsg: rpmsg{
+	compatible = "fsl,imx6sx-rpmsg";
+	status = "disabled";
+};
+
+&rpmsg{
+	vdev-nums = <1>;
+	reg = <0xbfff0000 0x10000>;
+	status = "okay";
+};