reset: meson: add dt-bindings for meson-axg audio arb

Add dt-bindings for the audio memory arbiter found on Amlogic's
A113 based SoCs

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/Documentation/devicetree/bindings/reset/amlogic,meson-axg-audio-arb.txt b/Documentation/devicetree/bindings/reset/amlogic,meson-axg-audio-arb.txt
new file mode 100644 (file)
index 0000000..26e542e
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/amlogic,meson-axg-audio-arb.txt
@@ -0,0 +1,21 @@
+* Amlogic audio memory arbiter controller
+
+The Amlogic Audio ARB is a simple device which enables or
+disables the access of Audio FIFOs to DDR on AXG based SoC.
+
+Required properties:
+- compatible: 'amlogic,meson-axg-audio-arb'
+- reg: physical base address of the controller and length of memory
+       mapped region.
+- clocks: phandle to the fifo peripheral clock provided by the audio
+         clock controller.
+- #reset-cells: must be 1.
+
+Example on the A113 SoC:
+
+arb: reset-controller@280 {
+       compatible = "amlogic,meson-axg-audio-arb";
+       reg = <0x0 0x280 0x0 0x4>;
+       #reset-cells = <1>;
+       clocks = <&clkc_audio AUD_CLKID_DDR_ARB>;
+};

diff --git a/include/dt-bindings/reset/amlogic,meson-axg-audio-arb.h b/include/dt-bindings/reset/amlogic,meson-axg-audio-arb.h
new file mode 100644 (file)
index 0000000..05c3636
--- /dev/null
+++ b/include/dt-bindings/reset/amlogic,meson-axg-audio-arb.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT)
+ *
+ * Copyright (c) 2018 Baylibre SAS.
+ * Author: Jerome Brunet <jbrunet@baylibre.com>
+ */
+
+#ifndef _DT_BINDINGS_AMLOGIC_MESON_AXG_AUDIO_ARB_H
+#define _DT_BINDINGS_AMLOGIC_MESON_AXG_AUDIO_ARB_H
+
+#define AXG_ARB_TODDR_A        0
+#define AXG_ARB_TODDR_B        1
+#define AXG_ARB_TODDR_C        2
+#define AXG_ARB_FRDDR_A        3
+#define AXG_ARB_FRDDR_B        4
+#define AXG_ARB_FRDDR_C        5
+
+#endif /* _DT_BINDINGS_AMLOGIC_MESON_AXG_AUDIO_ARB_H */