Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1562426

Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy

Show all headers | View raw

On 01/19/2017 06:10 AM, Stephen Boyd wrote:
> On 01/18, Bjorn Andersson wrote:
>> On Tue 17 Jan 22:54 PST 2017, Vivek Gautam wrote:
>>> On 01/16/2017 02:19 PM, Kishon Vijay Abraham I wrote:
>>>> On Tuesday 10 January 2017 04:21 PM, Vivek Gautam wrote:
>> [..]
>>>>> +		reset-names = "phy", "common", "cfg",
>>>>> +				"lane0", "lane1", "lane2";
>>>> Each lane has a separate clock, separate reset.. why not create sub-nodes for
>>>> each lane?
>>> Yes, each lane has separate pipe clock and resets.
>>> I can have a binding such as written below.
>> +1
>>
>>> Does it makes sense to pull in the tx, rx and pcs offsets as well
>>> to the child node, and iomap the entire address space of the phy ?
>>>
>> Note that you don't have to follow the same structure in your device
>> driver as you describe your hardware in devicetree.
>>
>> I would suggest that you replace the lane-offset and various lane
>> specific resources with subnodes, but keep the driver "as is".
>>
> Didn't we already move away from subnodes for lanes in an earlier
> revision of these patches? I seem to recall we did that because
> lanes are not devices and the whole "phy as a bus" concept not
> making sense.

Yea, we started out without having any sub-nodes and we
argued that we don't require them since the qmp device is
represented by the qmp node itself.
The lanes otoh are representative of gen_phys and related properties.

In the driver -
"struct qmp_phy " represents the lanes and holds "struct phy",
"struct qcom_qmp" represents the qmp block as a whole and holds "struct 
device"
Does this make lanes qualify to be childs of qmp ?

"phy as a bus" (just trying to understand here) -
let's say a usb phy controller has one HSIC phy port and one USB2 phy port.
So, should this phy controller be a bus providing two ports (and so we 
will have
couple of child nodes to the phy controller) ?


Regards
Vivek

-- 
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam <vivek.gautam@codeaurora.org> - 2017-01-18 08:00 +0100
  Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Bjorn Andersson <bjorn.andersson@linaro.org> - 2017-01-18 19:30 +0100
    Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Stephen Boyd <sboyd@codeaurora.org> - 2017-01-19 02:10 +0100
      Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam <vivek.gautam@codeaurora.org> - 2017-01-19 06:30 +0100
        Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Stephen Boyd <sboyd@codeaurora.org> - 2017-01-19 22:50 +0100
          Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam <vivek.gautam@codeaurora.org> - 2017-01-23 13:30 +0100
          Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Kishon Vijay Abraham I <kishon@ti.com> - 2017-01-24 10:40 +0100
            Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam <vivek.gautam@codeaurora.org> - 2017-01-24 15:10 +0100
              Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Kishon Vijay Abraham I <kishon@ti.com> - 2017-01-24 15:20 +0100
                Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam <vivek.gautam@codeaurora.org> - 2017-01-24 17:50 +0100
              Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Stephen Boyd <sboyd@codeaurora.org> - 2017-01-27 00:50 +0100
                Re: [PATCH v4 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam <vivek.gautam@codeaurora.org> - 2017-01-27 06:20 +0100

csiph-web