Describe the TI reset DT entries for TI SoC's.
Signed-off-by: Dan Murphy <[email protected]>
---
.../devicetree/bindings/reset/ti,reset.txt | 103 ++++++++++++++++++++
1 file changed, 103 insertions(+)
create mode 100644 Documentation/devicetree/bindings/reset/ti,reset.txt
diff --git a/Documentation/devicetree/bindings/reset/ti,reset.txt
b/Documentation/devicetree/bindings/reset/ti,reset.txt
new file mode 100644
index 0000000..9d5c29c
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+++ b/Documentation/devicetree/bindings/reset/ti,reset.txt
@@ -0,0 +1,103 @@
+Texas Instruments Reset Controller
+======================================
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+Specifying the reset entries for the IP module
+==============================================
+Parent module:
+This is the module node that contains the reset registers and bits.
+
+example:
+ prcm_resets: resets {
+ compatible = "ti,dra7-resets";
+ #reset-cells = <1>;
+ };
+
+Required parent properties:
+- compatible : Should be one of,
+ "ti,omap4-prm" for OMAP4 PRM instances
+ "ti,omap5-prm" for OMAP5 PRM instances
+ "ti,dra7-prm" for DRA7xx PRM instances
+ "ti,am4-prcm" for AM43xx PRCM instances
+ "ti,am3-prcm" for AM33xx PRCM instances
+
+Required child reset property:
+- compatible : Should be
+ "resets" for All TI SoCs
+
+example:
+ prm: prm@4ae06000 {
+ compatible = "ti,omap5-prm";
+ reg = <0x4ae06000 0x3000>;
+
+ prm_resets: resets {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ #reset-cells = <1>;
+ };
+ };
+
+
+Reset node declaration
+==============================================
+The reset node is declared in a parent child relationship. The main parent
+is the PRCM module which contains the base address. The first child within
+the reset parent declares the target modules reset name. This is followed by
+the control and status offsets.
+
+Within the first reset child node is a secondary child node which declares the
+reset signal of interest. Under this node the control and status bits
+are declared. These bits declare the bit mask for the target reset.
+
+
+Required properties:
+reg - This is the register offset from the PRCM parent.
+ This must be declared as:
+
+ reg = <control register offset>,
+ <status register offset>;
+
+control-bit - This is the bit within the register which controls the reset
+ of the target module. This is declared as a bit mask for the register.
+status-bit - This is the bit within the register which contains the status of
+ the reset of the target module.
+ This is declared as a bit mask for the register.
+
+example:
+&prm_resets {
+ dsp_rstctrl {
+ reg = <0x1c00>,
+ <0x1c04>;
+
+ dsp_reset: dsp_reset {
+ control-bit = <0x01>;
+ status-bit = <0x01>;
+ };
+ };
+};
+
+
+
+Client Node Declaration
+==============================================
+This is the consumer of the parent node to declare what resets this
+particular module is interested in.
+
+example:
+ src: src@55082000 {
+ resets = <&reset_src phandle>;
+ reset-names = "<reset_name>";
+ };
+
+Required Properties:
+reset_src - This is the parent DT entry for the reset controller
+phandle - This is the phandle of the specific reset to be used by the clien
+ driver.
+reset-names - This is the reset name of module that the device driver
+ needs to be able to reset. This value must correspond to a value within
+ the reset controller array.
+
+example:
+resets = <&prm_resets &dsp_mmu_reset>;
+reset-names = "dsp_mmu_reset";
--
1.7.9.5
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