dt-bindings: omap: add new binding for PRM instances

Add new binding for OMAP PRM (Power and Reset Manager) instances. Each
of these will act as a power domain controller and potentially as a reset
provider.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

diff --git a/Documentation/devicetree/bindings/arm/omap/prm-inst.txt b/Documentation/devicetree/bindings/arm/omap/prm-inst.txt
new file mode 100644 (file)
index 0000000..fcd3456
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/prm-inst.txt
@@ -0,0 +1,29 @@
+OMAP PRM instance bindings
+
+Power and Reset Manager is an IP block on OMAP family of devices which
+handle the power domains and their current state, and provide reset
+handling for the domains and/or separate IP blocks under the power domain
+hierarchy.
+
+Required properties:
+- compatible:  Must contain one of the following:
+               "ti,am3-prm-inst"
+               "ti,am4-prm-inst"
+               "ti,omap4-prm-inst"
+               "ti,omap5-prm-inst"
+               "ti,dra7-prm-inst"
+               and additionally must contain:
+               "ti,omap-prm-inst"
+- reg:         Contains PRM instance register address range
+               (base address and length)
+
+Optional properties:
+- #reset-cells:        Should be 1 if the PRM instance in question supports resets.
+
+Example:
+
+prm_dsp2: prm@1b00 {
+       compatible = "ti,dra7-prm-inst", "ti,omap-prm-inst";
+       reg = <0x1b00 0x40>;
+       #reset-cells = <1>;
+};