linux-kernel - Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller

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Date:   Mon, 13 Mar 2017 18:08:03 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:     Tejun Heo <tj@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Patrick Titiano <ptitiano@...libre.com>,
        linux-ide@...r.kernel.org,
        linux-devicetree <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller

2017-03-13 17:53 GMT+01:00 Sergei Shtylyov <sergei.shtylyov@...entembedded.com>:
> Hello!
>
> On 03/13/2017 07:36 PM, Bartosz Golaszewski wrote:
>
>> Add DT bindings for the onboard SATA controller present on the DM816x
>> SoCs.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
>> ---
>>  Documentation/devicetree/bindings/ata/ahci-dm816.txt | 20
>> ++++++++++++++++++++
>>  1 file changed, 20 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/ata/ahci-dm816.txt
>>
>> diff --git a/Documentation/devicetree/bindings/ata/ahci-dm816.txt
>> b/Documentation/devicetree/bindings/ata/ahci-dm816.txt
>> new file mode 100644
>> index 0000000..b87ed5a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/ata/ahci-dm816.txt
>> @@ -0,0 +1,20 @@
>> +Device tree binding for the TI DM816 AHCI SATA Controller
>> +---------------------------------------------------------
>> +
>> +Required properties:
>> +  - compatible: must be "ti,dm816-ahci"
>> +  - reg: physical base address and size of the register region used by
>> +         the controller (as defined by the AHCI 1.1 standard)
>> +  - interrupts: interrupt specifier (refer to the interrupt binding)
>> +  - clocks: clock specifiers (refer to the clock binding); two clocks
>
>
>    There should be a phandle preceding the clock specifier, all new such
> props are different to the old "interrupts" (which had phandle in a separate
> "interrupt-parent" prop).
>

I'm afraid I don't understand - could you point me to an example?

>> +            must be specified: the functional clock and an external
>> +            reference clock
>> +
>> +Example:
>> +
>> +       sata: sata@...40000 {
>> +               compatible = "ti,dm816-ahci";
>> +               reg = <0x4a140000 0xffff>;
>
>
>   I think you meant 0x10000 ISO 0xffff -- this is a size, not limit.
>

Right, thanks.

>> +               interrupts = <16>;
>> +               clocks = <&sysclk5_ck>, <&sata_refclk>;
>> +       };
>>
>
> MBR, Sergei
>

Thanks,
Bartosz Golaszewski