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author | Simon Horman <horms+renesas@verge.net.au> | 2017-07-11 13:44:20 +0200 |
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committer | Tejun Heo <tj@kernel.org> | 2017-07-15 07:07:28 -0400 |
commit | 6ac1d1532c888b030acb3b4ac82425448cb15198 (patch) | |
tree | 0e64789cbff3a094d090bb8dcd226d73d36ef4af /drivers | |
parent | ae867937009397649db2284d32ff7c9a1a2c3665 (diff) | |
download | linux-6ac1d1532c888b030acb3b4ac82425448cb15198.tar.bz2 |
ata: sata_rcar: add gen[23] fallback compatibility strings
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@verge.net.au>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/ata/sata_rcar.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c index ee9844758736..537d11869069 100644 --- a/drivers/ata/sata_rcar.c +++ b/drivers/ata/sata_rcar.c @@ -858,6 +858,14 @@ static const struct of_device_id sata_rcar_match[] = { .compatible = "renesas,sata-r8a7795", .data = (void *)RCAR_GEN2_SATA }, + { + .compatible = "renesas,rcar-gen2-sata", + .data = (void *)RCAR_GEN2_SATA + }, + { + .compatible = "renesas,rcar-gen3-sata", + .data = (void *)RCAR_GEN2_SATA + }, { }, }; MODULE_DEVICE_TABLE(of, sata_rcar_match); |