linux-kernel - regression: twl4030 audio/clock stopped working in v4.16

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Date:   Wed, 4 Apr 2018 20:29:49 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     Discussions about the Letux Kernel <letux-kernel@...nphoenux.org>,
        Tony Lindgren <tony@...mide.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>
Subject: regression: twl4030 audio/clock stopped working in v4.16

Hi Peter,
I just noticed a problem in v4.16 kernels with twl4030 audio and vibra driver no longer working.

Tracing it back shows that it already did appear in v4.16-rc1 and wasn't fixed up to v4.16.0.
Kernel v4.15.9 (the latest one where I have a binary) works.

The symptoms are:

[    1.557342] twl4030-audio 48070000.i2c:twl@48:audio: Invalid audio_mclk
[    1.564788] twl4030-audio: probe of 48070000.i2c:twl@48:audio failed with error -22
[    1.839141] TWL4030: HFCLK is not configured

Those are not visible in v4.15.9. And I am not aware of any changes to the gta04 device tree.

Do you know about this issue and a fix, before I start to bisect?

BR and thanks,
Nikolaus