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

From Bartosz Golaszewski <bgolaszewski@baylibre.com>
Newsgroups linux.kernel
Subject Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller
Date 2017-03-14 11:50 +0100
Message-ID <tkSbE-7fP-9@gated-at.bofh.it> (permalink)
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2017-03-13 18:27 GMT+01:00 Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>:
> On 03/13/2017 08:08 PM, Bartosz Golaszewski wrote:
>
>>>> Add DT bindings for the onboard SATA controller present on the DM816x
>>>> SoCs.
>>>>
>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.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?
>
>
>    Have you read Documentation/devicetree/bindings/clock/clock-bindings.txt,
> on clock consumers?

Yes I have. It says:

 66 clocks:         List of phandle and clock specifier pairs, one pair
 67                 for each clock input to the device.  Note: if the
 68                 clock provider specifies '0' for #clock-cells, then
 69                 only the phandle portion of the pair will appear.

>    In fact, your own example below doesn't have clock specifiers, only
> phandles.
>

Since the SATA reference clock specifies 0 for #clock-cells I'll omit
the clock specifier. On the other hand: I'll rephrase the clocks
property description in the bindings for clarity.

Thanks,
Bartosz

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Thread

[PATCH 0/2] ata: ahci-dm816: new driver Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2017-03-13 17:50 +0100
  [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2017-03-13 17:50 +0100
    Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA  controller Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2017-03-13 18:00 +0100
      Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2017-03-13 18:10 +0100
        Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA  controller Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2017-03-13 18:30 +0100
          Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA  controller Neil Armstrong <narmstrong@baylibre.com> - 2017-03-14 10:10 +0100
          Re: [PATCH 1/2] dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2017-03-14 11:50 +0100
  [PATCH 2/2] ata: ahci: add support for DaVinci DM816 SATA controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2017-03-13 17:50 +0100
    Re: [PATCH 2/2] ata: ahci: add support for DaVinci DM816 SATA  controller Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2017-03-14 10:00 +0100
      Re: [PATCH 2/2] ata: ahci: add support for DaVinci DM816 SATA  controller Neil Armstrong <narmstrong@baylibre.com> - 2017-03-14 10:10 +0100
        Re: [PATCH 2/2] ata: ahci: add support for DaVinci DM816 SATA controller Kevin Hilman <khilman@baylibre.com> - 2017-03-14 18:10 +0100

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