Re: [PATCH 1/5] phy: miphy365x: Add Device Tree bindings for the MiPHY365x

Kishon Vijay Abraham I
2014-07-03T09:07:08Z

Hi,

On Wednesday 02 July 2014 05:36 PM, Lee Jones wrote:
> On Wed, 02 Jul 2014, Kishon Vijay Abraham I wrote:
>> On Monday 30 June 2014 06:31 PM, Lee Jones wrote:
>>> The MiPHY365x is a Generic PHY which can serve various SATA or PCIe
>>> devices. It has 2 ports which it can use for either; both SATA, both
>>> PCIe or one of each in any configuration.
>>>
>>> Cc: Kishon Vijay Abraham I <kishon@ti.com>
>>> Acked-by: Mark Rutland <mark.rutland@arm.com>
>>> Acked-by: Alexandre Torgue <alexandre.torgue@st.com>
>>> Signed-off-by: Lee Jones <lee.jones@linaro.org>
>>> ---
>>> .../devicetree/bindings/phy/phy-miphy365x.txt | 76 ++++++++++++++++++++++
>>> 1 file changed, 76 insertions(+)
>>> create mode 100644 Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>>
>>> diff --git a/Documentation/devicetree/bindings/phy/phy-miphy365x.txt b/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>> new file mode 100644
>>> index 0000000..d75f300
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>> @@ -0,0 +1,76 @@
>>> +STMicroelectronics STi MIPHY365x PHY binding
>>> +============================================
>>> +
>>> +This binding describes a miphy device that is used to control PHY hardware
>>> +for SATA and PCIe.
>>> +
>>> +Required properties:
>>> +- compatible : Should be "st,miphy365x-phy"
>>> +- #phy-cells : Should be 2 (See second example)
>>> + First cell is the port number from:
>>> + - MIPHY_PORT_0
>>> + - MIPHY_PORT_1
>>
>> I'm just thinking if we can directly give phandle to the sub-node
>> (channel0/channel1 or port0/port1) we won't need this information in the PHY
>> specifier. This might need some modification in the phy-core but that can be done.
>
> If we do that, we need a new property to identify the port number. I
> figured using an existing cell to identify the port would be better
> than to try an introduce yet another property.

If we can directly give phandle to the sub-node where do you think port number
would be used?

Thanks
Kishon