clk: ti: Add support for dm814x ADPLL

On dm814x we have 13 ADPLLs with 3 to 4 outputs on each. The
ADPLLs have several dividers and muxes controlled by a shared
control register for each PLL.

Note that for the clocks to work as device drivers for booting on
dm814x, this patch depends on "ARM: OMAP2+: Change core_initcall
levels to postcore_initcall" that has already been merged.

Also note that this patch does not implement clk_set_rate for the
PLL, that will be posted later on when available.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/ti/adpll.txt b/Documentation/devicetree/bindings/clock/ti/adpll.txt
new file mode 100644
index 000000000000..4c8a2ce2cd70
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/ti/adpll.txt
@@ -0,0 +1,41 @@
+Binding for Texas Instruments ADPLL clock.
+
+Binding status: Unstable - ABI compatibility may be broken in the future
+
+This binding uses the common clock binding[1]. It assumes a
+register-mapped ADPLL with two to three selectable input clocks
+and three to four children.
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : shall be one of "ti,dm814-adpll-s-clock" or
+  "ti,dm814-adpll-lj-clock" depending on the type of the ADPLL
+- #clock-cells : from common clock binding; shall be set to 1.
+- clocks : link phandles of parent clocks clkinp and clkinpulow, note
+  that the adpll-s-clock also has an optional clkinphif
+- reg : address and length of the register set for controlling the ADPLL.
+
+Examples:
+	adpll_mpu_ck: adpll@40 {
+		#clock-cells = <1>;
+		compatible = "ti,dm814-adpll-s-clock";
+		reg = <0x40 0x40>;
+		clocks = <&devosc_ck &devosc_ck &devosc_ck>;
+		clock-names = "clkinp", "clkinpulow", "clkinphif";
+		clock-output-names = "481c5040.adpll.dcoclkldo",
+				     "481c5040.adpll.clkout",
+				     "481c5040.adpll.clkoutx2",
+				     "481c5040.adpll.clkouthif";
+	};
+
+	adpll_dsp_ck: adpll@80 {
+		#clock-cells = <1>;
+		compatible = "ti,dm814-adpll-lj-clock";
+		reg = <0x80 0x30>;
+		clocks = <&devosc_ck &devosc_ck>;
+		clock-names = "clkinp", "clkinpulow";
+		clock-output-names = "481c5080.adpll.dcoclkldo",
+				     "481c5080.adpll.clkout",
+				     "481c5080.adpll.clkoutldo";
+	};