linux-kernel - [PATCH v3 0/2] phy: rcar-gen2, rcar-gen3-usb2: add fallback binding

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Message-Id: <1457315921-30217-1-git-send-email-horms+renesas@verge.net.au>
Date:	Mon,  7 Mar 2016 10:58:39 +0900
From:	Simon Horman <horms+renesas@...ge.net.au>
To:	Kishon Vijay Abraham I <kishon@...com>
Cc:	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
	Simon Horman <horms+renesas@...ge.net.au>
Subject: [PATCH v3 0/2] phy: rcar-gen2, rcar-gen3-usb2: add fallback binding

Add fallback compatibility strings for rcar phy drivers.

In the case of Renesas R-Car hardware we know that there are generations of
SoCs, e.g. Gen 2 and Gen 3. But beyond that its not clear what the
relationship between IP blocks might be. For example, I believe that
r8a7790 is older than r8a7791 but that doesn't imply that the latter is a
descendant of the former or vice versa.

We can, however, by examining the documentation and behaviour of the
hardware at run-time observe that the current driver implementation appears
to be compatible with the IP blocks on SoCs within a given generation.

For the above reasons and convenience when enabling new SoCs a
per-generation fallback compatibility string scheme being adopted for
drivers for Renesas SoCs.

Changes in v3:
* Added Acks
* Corrected whitespace in examples

Changes in v2:
* Update new compatibility strings to match the preferred scheme for
  ordering elements
* Rebase

Simon Horman (2):
  phy: rcar-gen2: add fallback binding
  phy: rcar-gen3-usb2: add fallback binding

 Documentation/devicetree/bindings/phy/rcar-gen2-phy.txt      |  8 +++++++-
 Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt | 10 ++++++++--
 drivers/phy/phy-rcar-gen2.c                                  |  1 +
 drivers/phy/phy-rcar-gen3-usb2.c                             |  1 +
 4 files changed, 17 insertions(+), 3 deletions(-)

-- 
2.1.4