hello Arnd, peter, On 04/26/2016 01:44 PM, Arnd Bergmann wrote: > On Tuesday 26 April 2016 12:15:32 Peter Griffin wrote: >>> >>>> If not what would you recommend instead? >>> >>> It's still not clear to me what that bit in the syscfg register >>> is for. Given the error message about "sti-audio-clk-glue", >>> I suspect that this is actually a clock controller and that >>> it should be using the clock binding with a separate driver >>> instead of manipulating the regmap directly from the audio driver. >> >> Luckily I do have the datasheet for the audio-glue sysconf register. >> >> It says: - >> >> [11:8] PCM_CLK_SEL: Selects the frequency synthesizer clock or the external >> PCM clock for each channel. >> >> The driver only ever sets this to 1 which selects the frequency synthesizer >> clock. So the bitfield of the register which the driver is using (PCM_CLK_SEL) >> is a clock mux. > > Ok, that sounds like it could be either a really simple clock driver > with just a few lines, or integrated into an existing clock driver > if you already have one for this syscon node. > > Arnd > FYI, Name of this glue is related to the register name. But it does not concern only clock... This glue register is used to : - select clock source ( clock framework or external clock from GPIO) => one bit field per IP instance (player->clk_sel) - select uniperiph player IP instance for PCM out. (http://www.spinics.net/lists/alsa-devel/msg49034.html) Regards Arnaud -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
