linux-kernel - [PATCH 1/4] dt-binding: irq: imx-irqsteer: use irq number per channel instead of group number

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Date:   Fri, 18 Jan 2019 07:53:45 +0000
From:   Aisheng Dong <aisheng.dong@....com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        dl-linux-imx <linux-imx@....com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        Aisheng Dong <aisheng.dong@....com>,
        Marc Zyngier <marc.zyngier@....com>
Subject: [PATCH 1/4] dt-binding: irq: imx-irqsteer: use irq number per channel
 instead of group number

Not all 64 interrupts may be used in one group. e.g. most irqsteer in
imx8qxp and imx8qm subsystems supports only 32 interrupts.

As the IP integration parameters are Channel number and interrupts number,
let's use fsl,irqs-per-chan to represents how many interrupts supported
by this irqsteer channel.

Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Shawn Guo <shawnguo@...nel.org>
Cc: devicetree@...r.kernel.org
Signed-off-by: Dong Aisheng <aisheng.dong@....com>
---
 .../devicetree/bindings/interrupt-controller/fsl,irqsteer.txt       | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt
index 45790ce..eaabcda 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt
@@ -16,8 +16,8 @@ Required properties:
 - #interrupt-cells: Specifies the number of cells needed to encode an
   interrupt source. The value must be 1.
 - fsl,channel: The output channel that all input IRQs should be steered into.
-- fsl,irq-groups: Number of IRQ groups managed by this controller instance.
-  Each group manages 64 input interrupts.
+- fsl,irqs-per-chan: Number of input interrupts per channel. Should be multiple of 32
+  input interrupts and up to 512 interrupts.
 
 Example:
 
@@ -28,7 +28,7 @@ Example:
 		clocks = <&clk IMX8MQ_CLK_DISP_APB_ROOT>;
 		clock-names = "ipg";
 		fsl,channel = <0>;
-		fsl,irq-groups = <1>;
+		fsl,irqs-per-chan= <64>;
 		interrupt-controller;
 		#interrupt-cells = <1>;
 	};
-- 
2.7.4