This patch adds the devicetree bindings for MAX9485, a programmable audio
clock generator.
Signed-off-by: Daniel Mack <daniel@xxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
---
.../bindings/clock/maxim,max9485.txt | 59 +++++++++++++++++++
include/dt-bindings/clock/maxim,max9485.h | 18 ++++++
2 files changed, 77 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/maxim,max9485.txt
create mode 100644 include/dt-bindings/clock/maxim,max9485.h
diff --git a/Documentation/devicetree/bindings/clock/maxim,max9485.txt b/Documentation/devicetree/bindings/clock/maxim,max9485.txt
new file mode 100644
index 000000000000..61bec1100a94
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/maxim,max9485.txt
@@ -0,0 +1,59 @@
+Devicetree bindings for Maxim MAX9485 Programmable Audio Clock Generator
+
+This device exposes 4 clocks in total:
+
+- MAX9485_MCLKOUT: A gated, buffered output of the input clock of 27 MHz
+- MAX9485_CLKOUT: A PLL that can be configured to 16 different discrete
+ frequencies
+- MAX9485_CLKOUT[1,2]: Two gated outputs for MAX9485_CLKOUT
+
+MAX9485_CLKOUT[1,2] are children of MAX9485_CLKOUT which upchain all rate set
+requests.
+
+Required properties:
+- compatible: "maxim,max9485"
+- clocks: Input clock, must provice 27.000 MHz
+- clock-names: Must be set to "xclk"
+- #clock-cells: From common clock binding; shall be set to 1
+
+Optional properties:
+- reset-gpios: GPIO descriptor connected to the #RESET input pin
+- vdd-supply: A regulator node for Vdd
+- clock-output-names: Name of output clocks, as defined in common clock
+ bindings
+
+If not explicitly set, the output names are "mclkout", "clkout", "clkout1"
+and "clkout2".
+
+Clocks are defined as preprocessor macros in the dt-binding header.
+
+Example:
+
+ #include <dt-bindings/clock/maxim,max9485.h>
+
+ xo-27mhz: xo-27mhz {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <27000000>;
+ };
+
+ &i2c0 {
+ max9485: audio-clock@63 {
+ reg = <0x63>;
+ compatible = "maxim,max9485";
+ clock-names = "xclk";
+ clocks = <&xo-27mhz>;
+ reset-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+ vdd-supply = <&3v3-reg>;
+ #clock-cells = <1>;
+ };
+ };
+
+ // Clock consumer node
+
+ foo@0 {
+ compatible = "bar,foo";
+ /* ... */
+ clock-names = "foo-input-clk";
+ clocks = <&max9485 MAX9485_CLKOUT1>;
+ };
diff --git a/include/dt-bindings/clock/maxim,max9485.h b/include/dt-bindings/clock/maxim,max9485.h
new file mode 100644
index 000000000000..185b09ce1869
--- /dev/null
+++ b/include/dt-bindings/clock/maxim,max9485.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2018 Daniel Mack
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __DT_BINDINGS_MAX9485_CLK_H
+#define __DT_BINDINGS_MAX9485_CLK_H
+
+#define MAX9485_MCLKOUT 0
+#define MAX9485_CLKOUT 1
+#define MAX9485_CLKOUT1 2
+#define MAX9485_CLKOUT2 3
+
+#endif /* __DT_BINDINGS_MAX9485_CLK_H */
--
2.17.1
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