Re: [PATCH] ata: sata_rcar: add gen[23] fallback compatibility strings

On Tue, Jul 11, 2017 at 01:44:20PM +0200, Simon Horman wrote:

Add fallback compatibility string for R-Car Gen 2 and 3.

In the case of Renesas R-Car hardware we know that there are generations of
SoCs, e.g. Gen 1 and 2. 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.

Signed-off-by: Simon Horman <horms+renesas-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>
---
Based on libata/for-next
---
 Documentation/devicetree/bindings/ata/sata_rcar.txt | 14 +++++++++++---
 drivers/ata/sata_rcar.c                             |  8 ++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

Acked-by: Rob Herring <redacted>
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