linux-kernel - Re: [RFC PATCH] dt: Tegra XUSB padctl: per-lane PHYs and USB lane map

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Date:	Thu, 22 Oct 2015 16:03:01 +0300
From:	Mikko Perttunen <mikko.perttunen@...si.fi>
To:	Stephen Warren <swarren@...dotorg.org>,
	Jon Hunter <jonathanh@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Andrew Bresticker <abrestic@...omium.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	Stephen Warren <swarren@...dia.com>
Subject: Re: [RFC PATCH] dt: Tegra XUSB padctl: per-lane PHYs and USB lane map

On 10/20/2015 06:56 PM, Stephen Warren wrote:
> ...
>
> In drivers/pci/host/pci-tegra.c tegra_pcie_get_resources() I see a call
> to devm_phy_optional_get().
>
> The SATA driver doesn't seem to do anything with phys at the moment,
> although tegra124.dtsi does put phy-related properties into the SATA DT
> node.

FWIW, the SATA driver does use the PHY - just through the 
ahci_platform_{get,enable,...}_resources API. (so is life..)

Mikko

>
> So, we can either:
> a) Just ignore DT ABI for these cases claiming the DT binding is not yet
> declared stable.
>
> b) Continue to support those specifier values for ABI reasons, which
> needs the "_LEGACY" values shown above.
>
> (a) is certainly simpler.
> --
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