[Buildroot] ALSA not working /dev/snd/* not mounted

[Arnout Vandecappelle]

 Hi Alejandro,

On 16-04-18 17:58, Alejandro Ariel Fachini wrote:
> Hello:
> Working on SAM9x35 with buildroot and linux4sam 5.6
> CODEC wm8731
> 
> Compiling buildroot with /dev managment auto devtmpfs
> 
> when i run the kernel get:
>     input: at91_adc as /devices/soc0/ahb/ahb:apb/f804c000.adc/input/input0         
>     wm8731 0-001a: Assuming static MCLK                                            
>     0-001a supply AVDD not found, using dummy regulator                            
>     0-001a supply HPVDD not found, using dummy regulator                           
>     0-001a supply DCVDD not found, using dummy regulator                           
>     0-001a supply DBVDD not found, using dummy regulator                           
>     wm8731 0-001a: Failed to issue reset: -121                                     
>     wm8731: probe of 0-001a failed with error -121

 Well, it can't be probed, So either there is something wrong with the hardware,
or it's configured incorrectly in the device tree. For example, maybe it's not
powered because the regulator is not configured.

 There is nothing buildroot-related about this issue.

 Regards,
 Arnout

                                 
>     sam9x5-snd-wm8731 sound: ASoC: CODEC DAI wm8731-hifi not      
> registered            
>     sam9x5-snd-wm8731 sound: ASoC: Platform device allocation failed   
> [snip]

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
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