Hi Simon,
Thank you for the patch.
On Thursday 04 September 2014 09:55:19 Simon Horman wrote:
> In general Renesas hardware is not documented to the extent
> where the relationship between IP blocks on different SoCs can be assumed
> although they may appear to operate the same way. Furthermore the
> documentation typically does not specify a version for individual
> IP blocks. For these reasons a convention of using the SoC name in place
> of a version and providing SoC-specific compat strings has been adopted.
>
> Although not universally liked this convention is used in the bindings for
> a number of drivers for Renesas hardware. The purpose of this patch is to
> update the Renesas R-Car Compare Match Timer (CMT) driver to follow this
> convention.
>
> Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
> Acked-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
>
> ---
> * I plan to follow up with patches to use these new bindings in the
> dtsi files for the affected SoCs.
>
> v2
> * Reorder compat entries so more-specific entries and their fallbacks
> are grouped with the fallback entry coming last.
> * Explicitly document fallback
> ---
> .../devicetree/bindings/timer/renesas,cmt.txt | 44 ++++++++++++++++---
> 1 file changed, 38 insertions(+), 6 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/timer/renesas,cmt.txt
> b/Documentation/devicetree/bindings/timer/renesas,cmt.txt index
> a17418b..7b44f4b 100644
> --- a/Documentation/devicetree/bindings/timer/renesas,cmt.txt
> +++ b/Documentation/devicetree/bindings/timer/renesas,cmt.txt
> @@ -11,15 +11,47 @@ datasheets.
>
> Required Properties:
>
> - - compatible: must contain one of the following.
> - - "renesas,cmt-32" for the 32-bit CMT
> + - compatible: must contain one or more of the following:
> + - "renesas,cmt-32-r8a7740" for the R8a7740 32-bit CMT
> + (CMT0)
> + - "renesas,cmt-32-sh7372" for the SH7372 32-bit CMT
> + (CMT0)
> + - "renesas,cmt-32-sh73a0" for the SH73a0 32-bit CMT
> + (CMT0)
> + - "renesas,cmt-32" for all 32-bit CMT without fast clock support
> (CMT0 on sh7372, sh73a0 and r8a7740)
> - - "renesas,cmt-32-fast" for the 32-bit CMT with fast clock support
> + This is a fallback for the above renesas,cmt-32-* entries.
> +
> + - "renesas,cmt-32-fast-r8a7740" for the R8A7740 32-bit CMT with fast
> + clock support (CMT[234])
> + - "renesas,cmt-32-fast-sh7372" for the SH7372 32-bit CMT with fast
> + clock support (CMT[234])
> + - "renesas,cmt-32-fast-sh73a0" for the SH73A0 32-bit CMT with fast
> + clock support (CMT[234])
> + - "renesas,cmt-32-fast" for all 32-bit CMT with fast clock support
> (CMT[234] on sh7372, sh73a0 and r8a7740)
> - - "renesas,cmt-48" for the 48-bit CMT
> + This is a fallback for the above renesas,cmt-32-fast-* entries.
> +
> + - "renesas,cmt-48-sh7372" for the SH7372 48-bit CMT
> + (CMT1)
> + - "renesas,cmt-48-sh73a0" for the SH73A0 48-bit CMT
> + (CMT1)
> + - "renesas,cmt-48-r8a7740" for the R8A7740 48-bit CMT
> + (CMT1)
> + - "renesas,cmt-48" for all non-second generation 48-bit CMT
> (CMT1 on sh7372, sh73a0 and r8a7740)
> - - "renesas,cmt-48-gen2" for the second generation 48-bit CMT
> + This is a fallback for the above renesas,cmt-48-* entries.
> +
> + - "renesas,cmt-48-r8a73a4" for the R8A73A4 48-bit CMT
> + (CMT[01])
> + - "renesas,cmt-48-r8a7790" for the R8A7790 48-bit CMT
> + (CMT[01])
> + - "renesas,cmt-48-r8a7791" for the R8A7791 48-bit CMT
> + (CMT[01])
> + - "renesas,cmt-48-gen2" for all second generation 48-bit CMT
> (CMT[01] on r8a73a4, r8a7790 and r8a7791)
> + This is a fallback for the renesas,cmt-48-r8a73a4,
> + renesas,cmt-48-r8a7790 and renesas,cmt-48-gen2 entries.
If renesas,cmt-48-gen2 is a fallback for renesas,cmt-48-gen2, we'll have an
infinite loop :-) I suppose you meant
This is a fallback for the renesas,cmt-48-r8a73a4,
renesas,cmt-48-r8a7790 and renesas,cmt-48-r8a7791 entries.
With that change,
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> - reg: base address and length of the registers block for the timer
> module. - interrupts: interrupt-specifier for the timer, one per channel.
> @@ -36,7 +68,7 @@ Example: R8A7790 (R-Car H2) CMT0 node
> them channels 0 and 1 in the documentation.
>
> cmt0: timer@ffca0000 {
> - compatible = "renesas,cmt-48-gen2";
> + compatible = "renesas,cmt-48-r8a7790", "renesas,cmt-48-gen2";
> reg = <0 0xffca0000 0 0x1004>;
> interrupts = <0 142 IRQ_TYPE_LEVEL_HIGH>,
> <0 142 IRQ_TYPE_LEVEL_HIGH>;
--
Regards,
Laurent Pinchart
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