diff mbox

[1/2] devicetree: add binding for Sigma Designs SMP86xx interrupt controller

Message ID 1447958026-3015-2-git-send-email-mans@mansr.com
State Changes Requested, archived
Headers show

Commit Message

Måns Rullgård Nov. 19, 2015, 6:33 p.m. UTC
This adds a binding for the secondary interrupt controller in
Sigma Designs SMP86xx and SMP87xx chips.

Signed-off-by: Mans Rullgard <mans@mansr.com>
---
 .../interrupt-controller/sigma,smp8642-intc.txt    | 47 ++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt

Comments

Rob Herring (Arm) Nov. 20, 2015, 4:23 p.m. UTC | #1
On Thu, Nov 19, 2015 at 06:33:45PM +0000, Mans Rullgard wrote:
> This adds a binding for the secondary interrupt controller in
> Sigma Designs SMP86xx and SMP87xx chips.
> 
> Signed-off-by: Mans Rullgard <mans@mansr.com>
> ---
>  .../interrupt-controller/sigma,smp8642-intc.txt    | 47 ++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
> new file mode 100644
> index 0000000..f82cddf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
> @@ -0,0 +1,47 @@
> +Sigma Designs SMP86xx/SMP87xx secondary interrupt controller
> +
> +Required properties:
> +- compatible: should be "sigma,smp8642-intc"
> +- reg: physical address of MMIO region
> +- interrupt-parent: phandle of parent interrupt controller
> +- interrupt-controller: boolean
> +
> +One child node per control block with properties:
> +- sigma,reg-offset: offset of registers from main base address

Your driver defines these offsets too.

Do you expect to have many different variations here? If not, I would 
get rid of all the child nodes and just hard code it in the driver.

You could also simply do:

sigma,reg-offset = <0x0 0x100 0x300>;

> +- interrupt-controller: boolean
> +- #interrupt-cells: should be <2>, interrupt index and flags per interrupts.txt
> +- interrupts: interrupt spec of primary interrupt controller
> +- label: (optional) name for display purposes

NAK. Interrupt controllers are not really visible to users. Think of 
physical labels on things like connectors or LEDs.

> +
> +Example:
> +
> +intc: interrupt-controller@6e000 {
> +	compatible = "sigma,smp8642-intc";
> +	reg = <0x6e000 0x400>;
> +	interrupt-parent = <&gic>;
> +	interrupt-controller;
> +
> +	irq0: irq0 {
> +		sigma,reg-offset = <0x000>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +		interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
> +		label = "IRQ0";
> +	};
> +
> +	irq1: irq1 {
> +		sigma,reg-offset = <0x100>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +		interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
> +		label = "IRQ1";
> +	};
> +
> +	irq2: irq2 {
> +		sigma,reg-offset = <0x300>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +		interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> +		label = "IRQ2";
> +	};
> +};
> -- 
> 2.6.3
> 
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Måns Rullgård Nov. 20, 2015, 4:27 p.m. UTC | #2
Rob Herring <robh@kernel.org> writes:

> On Thu, Nov 19, 2015 at 06:33:45PM +0000, Mans Rullgard wrote:
>> This adds a binding for the secondary interrupt controller in
>> Sigma Designs SMP86xx and SMP87xx chips.
>> 
>> Signed-off-by: Mans Rullgard <mans@mansr.com>
>> ---
>>  .../interrupt-controller/sigma,smp8642-intc.txt    | 47 ++++++++++++++++++++++
>>  1 file changed, 47 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
>> 
>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
>> new file mode 100644
>> index 0000000..f82cddf
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
>> @@ -0,0 +1,47 @@
>> +Sigma Designs SMP86xx/SMP87xx secondary interrupt controller
>> +
>> +Required properties:
>> +- compatible: should be "sigma,smp8642-intc"
>> +- reg: physical address of MMIO region
>> +- interrupt-parent: phandle of parent interrupt controller
>> +- interrupt-controller: boolean
>> +
>> +One child node per control block with properties:
>> +- sigma,reg-offset: offset of registers from main base address
>
> Your driver defines these offsets too.
>
> Do you expect to have many different variations here? If not, I would 
> get rid of all the child nodes and just hard code it in the driver.

Then how will other DT nodes reference the correct one?
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
new file mode 100644
index 0000000..f82cddf
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
@@ -0,0 +1,47 @@ 
+Sigma Designs SMP86xx/SMP87xx secondary interrupt controller
+
+Required properties:
+- compatible: should be "sigma,smp8642-intc"
+- reg: physical address of MMIO region
+- interrupt-parent: phandle of parent interrupt controller
+- interrupt-controller: boolean
+
+One child node per control block with properties:
+- sigma,reg-offset: offset of registers from main base address
+- interrupt-controller: boolean
+- #interrupt-cells: should be <2>, interrupt index and flags per interrupts.txt
+- interrupts: interrupt spec of primary interrupt controller
+- label: (optional) name for display purposes
+
+Example:
+
+intc: interrupt-controller@6e000 {
+	compatible = "sigma,smp8642-intc";
+	reg = <0x6e000 0x400>;
+	interrupt-parent = <&gic>;
+	interrupt-controller;
+
+	irq0: irq0 {
+		sigma,reg-offset = <0x000>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
+		label = "IRQ0";
+	};
+
+	irq1: irq1 {
+		sigma,reg-offset = <0x100>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
+		label = "IRQ1";
+	};
+
+	irq2: irq2 {
+		sigma,reg-offset = <0x300>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
+		label = "IRQ2";
+	};
+};