[PATCH v4 5/5] ASoC: Intel: bytcr_wm5102: Add machine driver for BYT/WM5102

[Charles Keepax]

On Wed, Jan 20, 2021 at 10:49:57PM +0100, Hans de Goede wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> 
> Add a new ASoc Machine driver for Intel Baytrail platforms with a
> Wolfson Microelectronics WM5102 codec.
> 
> This is based on a past contributions [1] from Paulo Sergio Travaglia
> <pstglia at gmail.com> based on the Levono kernel [2] combined with
> insights in things like the speaker GPIO from the android-x86 android
> port for the Lenovo Yoga Tablet 2 1051F/L [3].
> 
> [1] https://patchwork.kernel.org/project/alsa-devel/patch/593313f5.3636c80a.50e05.47e9@mx.google.com/
> [2] https://github.com/lenovo-yt2-dev/android_kernel_lenovo_baytrail/blob/cm-12.1/sound/soc/intel/board/byt_bl_wm5102.c
> [3] https://github.com/Kitsune2222/Android_Yoga_Tablet_2-1051F_Kernel
> 
> The original machine driver from the Android ports was a crude modified
> copy of bytcr_rt5640.c adjusted to work with the WM5102 codec.
> This version has been extensively reworked to:
> 
> 1. Remove all rt5640 related quirk handling. to the best of my knowledge
> this setup is only used on the Lenovo Yoga Tablet 2 series (8, 10 and 13
> inch models) which all use the same setup. So there is no need to deal
> with all the variations with which we need to deal on rt5640 boards.
> 
> 2. Rework clock handling, properly turn off the FLL and the platform-clock
> when they are no longer necessary and don't reconfigure the FLL
> unnecessarily when it is already running. This fixes a number of:
> "Timed out waiting for lock" warnings being logged.
> 
> 3. Add the GPIO controlled Speaker-VDD regulator as a DAPM_SUPPLY
> 
> This only adds the machine driver and ACPI hooks, the BYT-CR detection
> quirk which these devices need will be added in a separate patch.
> 
> BugLink: https://github.com/thesofproject/linux/issues/2485
> Co-authored-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> Reviewed-by: Andy Shevchenko <andy.shevchenko at gmail.com>
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> ---

Reviewed-by: Charles Keepax <ckeepax at opensource.cirrus.com>

Thanks,
Charles