ARM: OMAP2: PRM: add support for OMAP2 specific clock providers

This patch adds support for initializing also omap2-prcm and omap2-scrm
through DT.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

2 files changed, 67 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/omap/prcm.txt b/Documentation/devicetree/bindings/arm/omap/prcm.txt
new file mode 100644
index 000000000000..79074dac684a
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/prcm.txt
@@ -0,0 +1,65 @@
+OMAP PRCM bindings
+
+Power Reset and Clock Manager lists the device clocks and clockdomains under
+a DT hierarchy. Each TI SoC can have multiple PRCM entities listed for it,
+each describing one module and the clock hierarchy under it. see [1] for
+documentation about the individual clock/clockdomain nodes.
+
+[1] Documentation/devicetree/bindings/clock/ti/*
+
+Required properties:
+- compatible:   Must be one of:
+                "ti,am3-prcm"
+                "ti,am3-scrm"
+                "ti,am4-prcm"
+                "ti,am4-scrm"
+                "ti,omap2-prcm"
+                "ti,omap2-scrm"
+                "ti,omap3-prm"
+                "ti,omap3-cm"
+                "ti,omap3-scrm"
+                "ti,omap4-cm1"
+                "ti,omap4-prm"
+                "ti,omap4-cm2"
+                "ti,omap4-scrm"
+                "ti,omap5-prm"
+                "ti,omap5-cm-core-aon"
+                "ti,omap5-scrm"
+                "ti,omap5-cm-core"
+                "ti,dra7-prm"
+                "ti,dra7-cm-core-aon"
+                "ti,dra7-cm-core"
+- reg:          Contains PRCM module register address range
+                (base address and length)
+- clocks:       clocks for this module
+- clockdomains: clockdomains for this module
+
+Example:
+
+cm: cm@48004000 {
+        compatible = "ti,omap3-cm";
+        reg = <0x48004000 0x4000>;
+
+        cm_clocks: clocks {
+                #address-cells = <1>;
+                #size-cells = <0>;
+        };
+
+        cm_clockdomains: clockdomains {
+        };
+}
+
+&cm_clocks {
+        omap2_32k_fck: omap_32k_fck {
+                #clock-cells = <0>;
+                compatible = "fixed-clock";
+                clock-frequency = <32768>;
+        };
+};
+
+&cm_clockdomains {
+        core_l3_clkdm: core_l3_clkdm {
+                compatible = "ti,clockdomain";
+                clocks = <&sdrc_ick>;
+        };
+};
diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 25e8b8232115..76ca320f007c 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -472,6 +472,8 @@ static struct of_device_id omap_prcm_dt_match_table[] = {
         { .compatible = "ti,am3-scrm" },
         { .compatible = "ti,am4-prcm" },
         { .compatible = "ti,am4-scrm" },
+        { .compatible = "ti,omap2-prcm" },
+        { .compatible = "ti,omap2-scrm" },
         { .compatible = "ti,omap3-prm" },
         { .compatible = "ti,omap3-cm" },
         { .compatible = "ti,omap3-scrm" },