From: Samuel Holland <samuel@sholland.org>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Jassi Brar <jassisinghbrar@gmail.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Ondrej Jirman <megous@megous.com>,
Vasily Khoruzhick <anarsoul@gmail.com>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sunxi@googlegroups.com,
Samuel Holland <samuel@sholland.org>
Subject: [PATCH v5 2/8] dt-bindings: mailbox: Add a sun6i message box binding
Date: Sat, 14 Dec 2019 22:24:49 -0600 [thread overview]
Message-ID: <20191215042455.51001-3-samuel@sholland.org> (raw)
In-Reply-To: <20191215042455.51001-1-samuel@sholland.org>
This mailbox hardware is present in Allwinner sun6i, sun8i, sun9i, and
sun50i SoCs. Add a device tree binding for it. As it has only been
tested on the A83T, A64, H3/H5, and H6 SoCs, only those compatibles are
included.
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
.../mailbox/allwinner,sun6i-a31-msgbox.yaml | 78 +++++++++++++++++++
1 file changed, 78 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..dd746e07acfd
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/allwinner,sun6i-a31-msgbox.yaml
@@ -0,0 +1,78 @@
+# 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:
+ items:
+ - enum:
+ - allwinner,sun8i-a83t-msgbox
+ - allwinner,sun8i-h3-msgbox
+ - allwinner,sun50i-a64-msgbox
+ - allwinner,sun50i-h6-msgbox
+ - const: allwinner,sun6i-a31-msgbox
+
+ reg:
+ items:
+ - description: MMIO register range
+
+ clocks:
+ maxItems: 1
+ description: bus clock
+
+ resets:
+ maxItems: 1
+ description: bus reset
+
+ interrupts:
+ maxItems: 1
+ description: controller interrupt
+
+ '#mbox-cells':
+ const: 1
+
+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
next prev parent reply other threads:[~2019-12-15 4:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-15 4:24 [PATCH v5 0/8] Allwinner sun6i message box support Samuel Holland
2019-12-15 4:24 ` [PATCH v5 1/8] clk: sunxi-ng: Mark msgbox clocks as critical Samuel Holland
2019-12-16 14:00 ` Maxime Ripard
2019-12-15 4:24 ` Samuel Holland [this message]
2019-12-16 14:04 ` [PATCH v5 2/8] dt-bindings: mailbox: Add a sun6i message box binding Maxime Ripard
2019-12-16 19:45 ` Samuel Holland
2019-12-26 10:14 ` Maxime Ripard
2019-12-15 4:24 ` [PATCH v5 3/8] mailbox: sun6i-msgbox: Add a new mailbox driver Samuel Holland
2020-01-02 12:06 ` Philipp Zabel
2019-12-15 4:24 ` [PATCH v5 4/8] ARM: dts: sunxi: a83t: Add msgbox node Samuel Holland
2019-12-15 4:24 ` [PATCH v5 5/8] ARM: dts: sunxi: h3/h5: " Samuel Holland
2019-12-15 4:24 ` [PATCH v5 6/8] arm64: dts: allwinner: a64: " Samuel Holland
2019-12-15 4:24 ` [PATCH v5 7/8] arm64: dts: allwinner: h6: " Samuel Holland
2019-12-15 4:24 ` [PATCH v5 8/8] firmware: arm_scpi: Support unidirectional mailbox channels Samuel Holland
2019-12-18 18:48 ` Sudeep Holla
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