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From: Samuel Holland <samuel@sholland.org>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jassi Brar <jassisinghbrar@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Ondrej Jirman <megous@megous.com>,
	Vasily Khoruzhick <anarsoul@gmail.com>
Cc: devicetree@vger.kernel.org, linux-sunxi@googlegroups.com,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Samuel Holland <samuel@sholland.org>
Subject: [PATCH v6 1/6] dt-bindings: mailbox: Add a sun6i message box binding
Date: Sun, 12 Jan 2020 23:18:47 -0600
Message-ID: <20200113051852.15996-2-samuel@sholland.org> (raw)
In-Reply-To: <20200113051852.15996-1-samuel@sholland.org>

This mailbox hardware is present in Allwinner sun6i, sun8i, sun9i, and
sun50i SoCs. Add a device tree binding for it.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 .../mailbox/allwinner,sun6i-a31-msgbox.yaml   | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml b/Documentation/devicetree/bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml
new file mode 100644
index 000000000000..75d5d97305e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/allwinner,sun6i-a31-msgbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner sunxi Message Box
+
+maintainers:
+  - Samuel Holland <samuel@sholland.org>
+
+description: |
+  The hardware message box on sun6i, sun8i, sun9i, and sun50i SoCs is a
+  two-user mailbox controller containing 8 unidirectional FIFOs. An interrupt
+  is raised for received messages, but software must poll to know when a
+  transmitted message has been acknowledged by the remote user. Each FIFO can
+  hold four 32-bit messages; when a FIFO is full, clients must wait before
+  attempting more transmissions.
+
+  Refer to ./mailbox.txt for generic information about mailbox device-tree
+  bindings.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - allwinner,sun8i-a83t-msgbox
+              - allwinner,sun8i-h3-msgbox
+              - allwinner,sun9i-a80-msgbox
+              - allwinner,sun50i-a64-msgbox
+              - allwinner,sun50i-h6-msgbox
+          - const: allwinner,sun6i-a31-msgbox
+      - const: allwinner,sun6i-a31-msgbox
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description: bus clock
+
+  resets:
+    maxItems: 1
+    description: bus reset
+
+  interrupts:
+    maxItems: 1
+
+  '#mbox-cells':
+    const: 1
+    description: first cell is the channel number (0-7)
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+  - interrupts
+  - '#mbox-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sun8i-h3-ccu.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/sun8i-h3-ccu.h>
+
+    msgbox: mailbox@1c17000 {
+            compatible = "allwinner,sun8i-h3-msgbox",
+                         "allwinner,sun6i-a31-msgbox";
+            reg = <0x01c17000 0x1000>;
+            clocks = <&ccu CLK_BUS_MSGBOX>;
+            resets = <&ccu RST_BUS_MSGBOX>;
+            interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+            #mbox-cells = <1>;
+    };
+
+...
-- 
2.23.0


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Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-13  5:18 [PATCH v6 0/6] Allwinner sun6i message box support Samuel Holland
2020-01-13  5:18 ` Samuel Holland [this message]
2020-01-13  9:30   ` [PATCH v6 1/6] dt-bindings: mailbox: Add a sun6i message box binding Maxime Ripard
2020-01-13 22:38   ` Rob Herring
2020-01-13  5:18 ` [PATCH v6 2/6] mailbox: sun6i-msgbox: Add a new mailbox driver Samuel Holland
2020-01-13  9:15   ` Philipp Zabel
2020-02-13  2:02   ` Jassi Brar
2020-02-13  2:18     ` Samuel Holland
2020-02-15  3:48       ` Samuel Holland
2020-02-15  4:47         ` Jassi Brar
2020-02-15  6:19           ` [PATCH] mailbox: sun6i-msgbox: Remove unneeded FIFO status check Samuel Holland
2020-01-13  5:18 ` [PATCH v6 3/6] ARM: dts: sunxi: a83t: Add msgbox node Samuel Holland
2020-01-13  5:18 ` [PATCH v6 4/6] ARM: dts: sunxi: h3/h5: " Samuel Holland
2020-01-13  5:18 ` [PATCH v6 5/6] arm64: dts: allwinner: a64: " Samuel Holland
2020-01-13  5:18 ` [PATCH v6 6/6] arm64: dts: allwinner: h6: " Samuel Holland
2020-02-13  1:43 ` [PATCH v6 0/6] Allwinner sun6i message box support Samuel Holland

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