On Fri, Apr 15, 2016 at 3:48 AM, Petr Kulhavy <petr@xxxxxxxxx> wrote: > > On 13.04.2016 16:30, Rob Herring wrote: >> >> On Mon, Apr 11, 2016 at 01:45:12PM +0200, Petr Kulhavy wrote: >>> >>> Add devicetree binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx >>> MultiChannel Buffered Serial Port (McBSP) >>> >>> The optional register range "dat" is not implemented at the moment. >>> The current driver supports only DMA into RX/TX registers but no FIFO. >>> Once the FIFO is implemented in the driver the "dat" range will be used. >>> >>> Signed-off-by: Petr Kulhavy <petr@xxxxxxxxx> >>> --- >>> v1: initial >>> v2: add missing TC channel in dmas properties (for compatibility with the >>> new EDMA3 binding) >>> remove "-audio" postfix from the compatible string >>> remove "channel-combine" property >>> >>> .../devicetree/bindings/sound/davinci-mcbsp.txt | 51 >>> ++++++++++++++++++++++ >>> 1 file changed, 51 insertions(+) >>> create mode 100644 >>> Documentation/devicetree/bindings/sound/davinci-mcbsp.txt >>> >>> diff --git a/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt >>> b/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt >>> new file mode 100644 >>> index 000000000000..de45865c3863 >>> --- /dev/null >>> +++ b/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt >>> @@ -0,0 +1,51 @@ >>> +Texas Instruments DaVinci McBSP module >>> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >>> + >>> +This binding describes the "Multi-channel Buffered Serial Port" (McBSP) >>> +audio interface found in some TI DaVinci processors like the OMAP-L138 >>> or AM180x. >>> + >>> + >>> +Required properties: >>> +~~~~~~~~~~~~~~~~~~~~ >>> +- compatible : "ti,da850-mcbsp" >> >> You list several SoCs above, but only one compatible string here. A >> specific compatible string per SoC please. >> > Hi Rob, > > thank you for your feedback. I can test only on the AM1808 platform, however > as far as I understand the OMAP L138 and AM1808 use the same McBSP hardware. > The TI guys can give more insight here... Isn't it then redundant to define > more compatible strings? Sorry for my ignorance, I just don't know the > policy of defining the compatible strings. Based on Sekhar's reply okay. >>> + >>> +- reg : physical base address and length of the controller memory mapped >>> + region(s). >>> +- reg-names : Should contain: >>> + * "mpu" for the main registers (required). For compatibility >>> with >>> + existing software, it is recommended this is the first entry. >> >> s/recommended/required/ > > Recommended is correct, but I think it make sense to drop the sentence. > If the reg-names are provided then the probe() finds the resource regardless > of the index. > If not provided it expects it at index 0. > But since we declare that the reg-names is mandatory this sentence is just > confusing and should be removed. No, required is correct. The order of reg (or any other property) entries must be defined regardless of the use of *-names or not. Rob _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
