From 02985b94638b4de3ef9f2eb2ac5befe5bab12c26 Mon Sep 17 00:00:00 2001
From: Philipp Zabel
Date: Thu, 28 Mar 2013 17:35:19 +0100
Subject: ARM i.MX6q: Add GPU, VPU, IPU, and OpenVG resets to System Reset
Controller (SRC)
The SRC has auto-deasserting reset bits that control reset lines to
the GPU, VPU, IPU, and OpenVG IP modules. This patch adds a reset
controller that can be controlled by those devices using the
reset controller API.
Signed-off-by: Philipp Zabel
Reviewed-by: Stephen Warren
Reviewed-by: Marek Vasut
Reviewed-by: Pavel Machek
Signed-off-by: Shawn Guo
---
.../devicetree/bindings/reset/fsl,imx-src.txt | 49 ++++++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 Documentation/devicetree/bindings/reset/fsl,imx-src.txt
(limited to 'Documentation/devicetree/bindings/reset')
diff --git a/Documentation/devicetree/bindings/reset/fsl,imx-src.txt b/Documentation/devicetree/bindings/reset/fsl,imx-src.txt
new file mode 100644
index 000000000000..13301777e11c
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/fsl,imx-src.txt
@@ -0,0 +1,49 @@
+Freescale i.MX System Reset Controller
+======================================
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+Required properties:
+- compatible: Should be "fsl,-src"
+- reg: should be register base and length as documented in the
+ datasheet
+- interrupts: Should contain SRC interrupt and CPU WDOG interrupt,
+ in this order.
+- #reset-cells: 1, see below
+
+example:
+
+src: src@020d8000 {
+ compatible = "fsl,imx6q-src";
+ reg = <0x020d8000 0x4000>;
+ interrupts = <0 91 0x04 0 96 0x04>;
+ #reset-cells = <1>;
+};
+
+Specifying reset lines connected to IP modules
+==============================================
+
+The system reset controller can be used to reset the GPU, VPU,
+IPU, and OpenVG IP modules on i.MX5 and i.MX6 ICs. Those device
+nodes should specify the reset line on the SRC in their resets
+property, containing a phandle to the SRC device node and a
+RESET_INDEX specifying which module to reset, as described in
+reset.txt
+
+example:
+
+ ipu1: ipu@02400000 {
+ resets = <&src 2>;
+ };
+ ipu2: ipu@02800000 {
+ resets = <&src 4>;
+ };
+
+The following RESET_INDEX values are valid for i.MX5:
+GPU_RESET 0
+VPU_RESET 1
+IPU1_RESET 2
+OPEN_VG_RESET 3
+The following additional RESET_INDEX value is valid for i.MX6:
+IPU2_RESET 4
--
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