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authorTero Kristo <t-kristo@ti.com>2013-07-15 13:14:20 +0300
committerMike Turquette <mturquette@linaro.org>2014-01-17 12:35:45 -0800
commit24582b3407775d57f06becfccd8cd202bc01eda6 (patch)
treed365fb760c6433fcc2dcc6a3dd0c53078445ad58 /Documentation/devicetree/bindings/clock
parent45622e2162b6d5907006f4595f2ac862afe1dfb5 (diff)
CLK: TI: add interface clock support for OMAP3
OMAP3 has interface clocks in addition to functional clocks, which require special handling for the autoidle and idle status register offsets mainly. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
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+Binding for Texas Instruments interface clock.
+
+Binding status: Unstable - ABI compatibility may be broken in the future
+
+This binding uses the common clock binding[1]. This clock is
+quite much similar to the basic gate-clock [2], however,
+it supports a number of additional features, including
+companion clock finding (match corresponding functional gate
+clock) and hardware autoidle enable / disable.
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+[2] Documentation/devicetree/bindings/clock/gate-clock.txt
+
+Required properties:
+- compatible : shall be one of:
+ "ti,omap3-interface-clock" - basic OMAP3 interface clock
+ "ti,omap3-no-wait-interface-clock" - interface clock which has no hardware
+ capability for waiting clock to be ready
+ "ti,omap3-hsotgusb-interface-clock" - interface clock with USB specific HW
+ handling
+ "ti,omap3-dss-interface-clock" - interface clock with DSS specific HW handling
+ "ti,omap3-ssi-interface-clock" - interface clock with SSI specific HW handling
+ "ti,am35xx-interface-clock" - interface clock with AM35xx specific HW handling
+- #clock-cells : from common clock binding; shall be set to 0
+- clocks : link to phandle of parent clock
+- reg : base address for the control register
+
+Optional properties:
+- ti,bit-shift : bit shift for the bit enabling/disabling the clock (default 0)
+
+Examples:
+ aes1_ick: aes1_ick@48004a14 {
+ #clock-cells = <0>;
+ compatible = "ti,omap3-interface-clock";
+ clocks = <&security_l4_ick2>;
+ reg = <0x48004a14 0x4>;
+ ti,bit-shift = <3>;
+ };
+
+ cam_ick: cam_ick@48004f10 {
+ #clock-cells = <0>;
+ compatible = "ti,omap3-no-wait-interface-clock";
+ clocks = <&l4_ick>;
+ reg = <0x48004f10 0x4>;
+ ti,bit-shift = <0>;
+ };
+
+ ssi_ick_3430es2: ssi_ick_3430es2@48004a10 {
+ #clock-cells = <0>;
+ compatible = "ti,omap3-ssi-interface-clock";
+ clocks = <&ssi_l4_ick>;
+ reg = <0x48004a10 0x4>;
+ ti,bit-shift = <0>;
+ };