[yocto] Trouble configuring kernel

[Greg Wilson-Lindberg]

I'm trying to add a driver to the Raspberry Pi3 kernel. The driver is for an  SOC codec.


I've created a .bbappend file with a do_configure_append that is adding configuration options for other drivers and I tested with another SOC driver that I can turn on.


In looking at the Kconfig file the driver that I'm trying to enable is specified like this:


config SND_SOC_MAX9768
tristate

For the other SOC driver that I have been able to turn on it looks like this:


config SND_SOC_WM8978
tristate "Wolfson Microelectronics WM8978 codec"
depends on I2C

I tried running -c menuconfig and the drivers that are specified with the quoted string description and the "depends on I2C" line show up in the SOC menu, the ones that only have the "tristate" by itself don't show up in the menu.


I'm building on Morty, with the 4.4.50 kernel on an Ubuntu 16.04 machine.


Can anyone shed any light on what is happening?


 Regards,




Greg Wilson-Lindberg


Principal Firmware Engineer | Sakura Finetek USA, Inc.





1750 W 214th Street | Torrance, CA 90501 | U.S.A.


T: +1 310 783 5075


F: +1 310 618 6902 | E: gwilson at sakuraus.com<mailto:gwilson at sakuraus.com>


www.sakuraus.com<http://www.sakuraus.com>





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