linux-kernel - [PATCH V3 1/2] dt-bindings/irq: add binding for NXP INTMUX interrupt multiplexer

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Message-Id: <1576827431-31942-2-git-send-email-qiangqing.zhang@nxp.com>
Date:   Fri, 20 Dec 2019 15:37:10 +0800
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     maz@...nel.org, tglx@...utronix.de, jason@...edaemon.net,
        robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, linux-imx@....com,
        linux-kernel@...r.kernel.org, fugang.duan@....com,
        linux-arm-kernel@...ts.infradead.org,
        Joakim Zhang <qiangqing.zhang@....com>
Subject: [PATCH V3 1/2] dt-bindings/irq: add binding for NXP INTMUX interrupt multiplexer

This patch adds the DT bindings for the NXP INTMUX interrupt multiplexer
for i.MX8 family SoCs.

Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
 .../interrupt-controller/fsl,intmux.txt       | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/fsl,intmux.txt

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,intmux.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,intmux.txt
new file mode 100644
index 000000000000..3ebe9cac5f20
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,intmux.txt
@@ -0,0 +1,36 @@
+Freescale INTMUX interrupt multiplexer
+
+Required properties:
+
+- compatible: Should be:
+   - "fsl,imx-intmux"
+- reg: Physical base address and size of registers.
+- interrupts: Should contain the parent interrupt lines (up to 8) used to
+  multiplex the input interrupts.
+- clocks: Should contain one clock for entry in clock-names.
+- clock-names:
+   - "ipg": main logic clock
+- interrupt-controller: Identifies the node as an interrupt controller.
+- #interrupt-cells: Specifies the number of cells needed to encode an
+  interrupt source. The value must be 2.
+   - the 1st cell: hardware interrupt number
+   - the 2nd cell: channel index, value must smaller than channels used
+
+Optional properties:
+
+- fsl,intmux_chans: The number of channels used for interrupt source. The
+  Maximum value is 8. If this property is not set in DT then driver uses
+  1 channel by default.
+
+Example:
+
+	intmux@...00000 {
+		compatible = "fsl,imx-intmux";
+		reg = <0x37400000 0x1000>;
+		interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk IMX8QM_CM40_IPG_CLK>;
+		clock-names = "ipg";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+	};
+
-- 
2.17.1