Re: [PATCH 02/25] devicetree: bindings: scsi: HiSi SAS

[Rob Herring <robh@kernel.org>]

On Mon, Oct 12, 2015 at 10:20 AM, John Garry <john.garry@huawei.com> wrote:
> Add devicetree bindings for HiSilicon SAS driver.

In the future, please use get_maintainers.pl.

> Signed-off-by: John Garry <john.garry@huawei.com>
> ---
>  .../devicetree/bindings/scsi/hisilicon-sas.txt     | 63 ++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
>
> diff --git a/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt b/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
> new file mode 100644
> index 0000000..472c022
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
> @@ -0,0 +1,63 @@
> +* HiSilison SAS controller
> +
> +The HiSilicon SAS controller supports SAS/SATA.
> +
> +Main node required properties:
> +  - compatible : value should be as follows:
> +       (a) "hisilicon,sas-controller-v1" for v1 of HiSilicon SAS controller IP
> +
> +  - controller-id : identifier for controller in the SoC

We don't do indexes in DT (mostly). Why do you need this?

> +  - reg : Address and length of the register sets for the device
> +   - SAS controller registers
> +   - SAS controller control registers
> +
> +  - reset-reg : offset to reset, status, and clock registers in control registers

Within the above register range? If so and if this varies, then that
implies there is more than 1 version of IP. In that case you should
have a more specific compatible string.

How long is this property I count 3 cells here, but the example has 5.
Define what each cell corresponds to specifically.

> +
> +  - queue-count : number of delivery and completion queues in the controller
> +
> +  - phy-count : number of phys accessible by the controller
> +
> +  - interrupts : Interrupts for phys, completion queues, and fatal
> +                interrupts:
> +                 - Each phy has 3 interrupt sources:
> +                       - broadcast
> +                       - phyup
> +                       - abnormal
> +                 - Each completion queue has 1 interrupt source
> +                 - Each controller has 2 fatal interrupt sources:
> +                       - ECC
> +                       - AXI bus
> +
> +Example:
> +       sas0: sas@c1000000 {
> +               compatible = "hisilicon,sas-controller-v1";
> +               controller-id = <0>;
> +               reg = <0x0 0xc1000000 0x0 0x10000>,
> +                       <0x0 0xc0000000 0x0 0x10000>;
> +               reset-reg = <0xa60 0x33c 0x5a30 0xa64 0x338>;
> +               queue-count = <32>;
> +               phy-count = <8>;
> +               #interrupt-cells = <2>;
> +               dma-coherent;
> +               interrupt-parent = <&mbigen_dsa>;
> +               interrupts = <259 4>, <263 4>,<264 4>,/* phy irq(0~79) */
> +                               <269 4>,<273 4>,<274 4>,/* phy irq(0~79) */
> +                               <279 4>,<283 4>,<284 4>,/* phy irq(0~79) */
> +                               <289 4>,<293 4>,<294 4>,/* phy irq(0~79) */
> +                               <299 4>,<303 4>,<304 4>,/* phy irq(0~79) */
> +                               <309 4>,<313 4>,<314 4>,/* phy irq(0~79) */
> +                               <319 4>,<323 4>,<324 4>,/* phy irq(0~79) */
> +                               <329 4>,<333 4>,<334 4>,/* phy irq(0~79) */
> +                               <336 1>,<337 1>,<338 1>,<339 1>,<340 1>,
> +                               <341 1>,<342 1>,<343 1>,/* cq irq (80~111) */
> +                               <344 1>,<345 1>,<346 1>,<347 1>,<348 1>,
> +                               <349 1>,<350 1>,<351 1>,/* cq irq (80~111) */
> +                               <352 1>,<353 1>,<354 1>,<355 1>,<356 1>,
> +                               <357 1>,<358 1>,<359 1>,/* cq irq (80~111) */
> +                               <360 1>,<361 1>,<362 1>,<363 1>,<364 1>,
> +                               <365 1>,<366 1>,<367 1>,/* cq irq (80~111) */
> +                               <376 4>,/* chip fatal error irq(120) */
> +                               <381 4>;/* chip fatal error irq(125) */
> +               status = "okay";
> +       };
> --
> 1.9.1
>
> --
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