linux-kernel - Re: [RFC 04/12] phy: Add simple-phy driver

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Date:	Mon, 4 Nov 2013 12:38:49 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Tomasz Stanislawski <t.stanislaws@...sung.com>
CC:	<devicetree@...r.kernel.org>, <linux-samsung-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
	<kyungmin.park@...sung.com>, <t.figa@...sung.com>,
	<sw0312.kim@...sung.com>, <inki.dae@...sung.com>,
	<rahul.sharma@...sung.com>, <kgene.kim@...sung.com>,
	<s.nawrocki@...sung.com>, <thomas.abraham@...aro.org>,
	<mturquette@...aro.org>
Subject: Re: [RFC 04/12] phy: Add simple-phy driver

Hi,

On Friday 25 October 2013 01:21 PM, Tomasz Stanislawski wrote:
> Hi,
> Please refer to the comments below.
>
> On 10/24/2013 05:52 PM, Kishon Vijay Abraham I wrote:
>> Hi,
>>
>> On Monday 21 October 2013 07:48 PM, Tomasz Stanislawski wrote:
>>> Add simple-phy driver to support a single register
>>> PHY interfaces present on Exynos4 SoC.
>>
>> How are these PHY interfaces modelled in the SoC? Where does the register
>> actually reside?
>
> Initially, I was planning to add PHY for HDMI_PHY register in
> power management register set on s5pv310 soc.

If that register is part of the power management register space, I don't 
think it justifies creating a PHY driver for it.
>
> However other PHYs use very similar interface (setting bit 0).
> This includes DAC_PHY, ADC_PHY, PCIe_PHY, SATA_PHY.
> Moreover it suits well to USBDEVICE_PHY, USBHOST_PHY.

How is it currently being done for these drivers? Is it being done in 
the patches sent by Kamil or Vivek?

Thanks
Kishon
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