linux-kernel - [PATCH 1/2] dt-bindings: i3c: Document MediaTek I3C master bindings

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Message-ID: <1559533863-10292-2-git-send-email-qii.wang@mediatek.com>
Date:   Mon, 3 Jun 2019 11:51:02 +0800
From:   Qii Wang <qii.wang@...iatek.com>
To:     <bbrezillon@...nel.org>
CC:     <matthias.bgg@...il.com>, <linux-i3c@...ts.infradead.org>,
        <gregkh@...uxfoundation.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <leilk.liu@...iatek.com>,
        <qii.wang@...iatek.com>, <liguo.zhang@...iatek.com>,
        <xinping.qian@...iatek.com>
Subject: [PATCH 1/2] dt-bindings: i3c: Document MediaTek I3C master bindings

Document MediaTek I3C master DT bindings.

Signed-off-by: Qii Wang <qii.wang@...iatek.com>
---
 .../devicetree/bindings/i3c/mtk,i3c-master.txt     |   50 ++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt

diff --git a/Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt b/Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt
new file mode 100644
index 0000000..89ec380
--- /dev/null
+++ b/Documentation/devicetree/bindings/i3c/mtk,i3c-master.txt
@@ -0,0 +1,50 @@
+Bindings for MediaTek I3C master block
+=====================================
+
+Required properties:
+--------------------
+- compatible: shall be "mediatek,i3c-master"
+- reg: physical base address of the controller and apdma base, length of
+  memory mapped region.
+- reg-names: should be "main" for controller and "dma" for apdma.
+- interrupts: interrupt number to the cpu.
+- clock-div: the fixed value for frequency divider of clock source in i3c
+  module. Each IC may be different.
+- clocks: clock name from clock manager.
+- clock-names: must include "main" and "dma".
+
+Mandatory properties defined by the generic binding (see
+Documentation/devicetree/bindings/i3c/i3c.txt for more details):
+
+- #address-cells: shall be set to 3
+- #size-cells: shall be set to 0
+
+Optional properties defined by the generic binding (see
+Documentation/devicetree/bindings/i3c/i3c.txt for more details):
+
+- i2c-scl-hz
+- i3c-scl-hz
+
+I3C device connected on the bus follow the generic description (see
+Documentation/devicetree/bindings/i3c/i3c.txt for more details).
+
+Example:
+
+	i3c0: i3c@...0d000 {
+		compatible = "mediatek,i3c-master";
+		reg = <0x1100d000 0x100>,
+		      <0x11000300 0x80>;
+		reg-names = "main", "dma";
+		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
+		clock-div = <16>;
+		clocks = <&i3c0_ck>, <&ap_dma_ck>;
+		clock-names = "main", "dma";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		i2c-scl-hz = <100000>;
+
+		nunchuk: nunchuk@52 {
+			compatible = "nintendo,nunchuk";
+			reg = <0x52 0x80000010 0>;
+		};
+	};
-- 
1.7.9.5