Hi Mark:
在 2015/12/17 21:52, Mark Rutland 写道:
> On Thu, Dec 17, 2015 at 07:56:34PM +0800, MaJun wrote:
>> From: Ma Jun <[email protected]>
[...]
>> +- compatible: Should be "hisilicon,mbigen-v2"
>> +
>> +- reg: Specifies the base physical address and size of the Mbigen
>> + registers.
>> +
>> +- interrupt controller: Identifies the node as an interrupt controller
>> +
>> +- msi-parent: Specifies the MSI controller this mbigen use.
>> + For more detail information,please refer to the generic msi-parent
>> binding in
>> + Documentation/devicetree/bindings/interrupt-controller/msi.txt.
>> +
>> +- num-msis:Specifies the total number of interrupt this device has.
>
> Is this the number of pins implemented? Or the number of pins that are
> in use?
>
> The latter feels like something we can derive.
num-msis means the total number of pins implemented.
>
>> +- #interrupt-cells : Specifies the number of cells needed to encode an
>> + interrupt source. The value must be 2.
>> +
>> + The 1st cell is hardware pin number of the interrupt.This number is local
>> to
>> + each mbigen chip and in the range from 0 to the maximum interrupts number
>> + of the mbigen.
>
> Just to check: 0 - 63 represent the "reserved" pins, yes?
Yes, you are right.
>
> Other than those questions, this looks good to me.
Do i need to post a new patch to update these two questions?
Thanks!
MaJun
>
> Thanks,
> Mark.
>
>> +
>> + The 2nd cell is the interrupt trigger type.
>> + The value of this cell should be:
>> + 1: rising edge triggered
>> + or
>> + 4: high level triggered
>> +
>> +Examples:
>> +
>> + mbigen_device_gmac:intc {
>> + compatible = "hisilicon,mbigen-v2";
>> + reg = <0x0 0xc0080000 0x0 0x10000>;
>> + interrupt-controller;
>> + msi-parent = <&its_dsa 0x40b1c>;
>> + num-msis = <9>;
>> + #interrupt-cells = <2>;
>> + };
>> +
>> +Devices connect to mbigen required properties:
>> +----------------------------------------------------
>> +-interrupt-parent: Specifies the mbigen device node which device connected.
>> +
>> +-interrupts:Specifies the interrupt source.
>> + For the specific information of each cell in this property,please refer to
>> + the "interrupt-cells" description mentioned above.
>> +
>> +Examples:
>> + gmac0: ethernet@c2080000 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + reg = <0 0xc2080000 0 0x20000>,
>> + <0 0xc0000000 0 0x1000>;
>> + interrupt-parent = <&mbigen_device_gmac>;
>> + interrupts = <656 1>,
>> + <657 1>;
>> + };
>> +
>> --
>> 1.7.1
>>
>>
>
> .
>
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