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6ac1d1532c
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>
33 lines
1.1 KiB
Plaintext
33 lines
1.1 KiB
Plaintext
* Renesas R-Car SATA
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Required properties:
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- compatible : should contain one or more of the following:
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- "renesas,sata-r8a7779" for R-Car H1
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- "renesas,sata-r8a7790-es1" for R-Car H2 ES1
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- "renesas,sata-r8a7790" for R-Car H2 other than ES1
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- "renesas,sata-r8a7791" for R-Car M2-W
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- "renesas,sata-r8a7793" for R-Car M2-N
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- "renesas,sata-r8a7795" for R-Car H3
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- "renesas,rcar-gen2-sata" for a generic R-Car Gen2 compatible device
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- "renesas,rcar-gen3-sata" for a generic R-Car Gen3 compatible device
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- "renesas,rcar-sata" is deprecated
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When compatible with the generic version nodes
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must list the SoC-specific version corresponding
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to the platform first followed by the generic
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version.
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- reg : address and length of the SATA registers;
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- interrupts : must consist of one interrupt specifier.
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- clocks : must contain a reference to the functional clock.
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Example:
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sata0: sata@ee300000 {
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compatible = "renesas,sata-r8a7791", "renesas,rcar-gen2-sata";
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reg = <0 0xee300000 0 0x2000>;
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interrupt-parent = <&gic>;
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interrupts = <0 105 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&mstp8_clks R8A7791_CLK_SATA0>;
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};
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