Hi,
When running linux-next 20130607 on a mx6qsabrelite I see that the audio drivers fail to probe. Added some printk's to better illustrate the problem:
mmcblk0: mmc0:b5a1 SD04G 3.69 GiB **** reading the chip ID sgtl5000: probe of 0-000a failed with error -5 ****** enabling the codec clock imx-sgtl5000 sound.13: ASoC: CODEC (null) not registered imx-sgtl5000 sound.13: snd_soc_register_card failed (-517) platform sound.13: Driver imx-sgtl5000 requests probe defer
The problem here is that the codec driver (sgtl5000) is being probed prior to the machine driver (imx-sgtl5000).
The reading of the chip ID fails because at this point in time there is no codec clock, which is turned on by imx-sgtl5000.
Running 3.10-rc4, the order of the events is as expected: imx-sgtl5000 is called first and sgtl5000 is called later. In this case the probe works as usual.
Tried doing a bisect, but this was not succesful due to several bisect breakages (build issues and non-booting kernels) on its way.
Would anyone have some suggestion as to why the codec driver is getting probed first?
Thanks,
Fabio Estevam