Re: [PATCH 06/16] ASoC: twl4030-codec: Allow setting APLL rate through the .set_sysclk() interface

Andreas Kemnade <[email protected]> Tue, 14 Jul 2026 20:36:04 +0200

Newsgroups	org.kernel.vger.linux-fbdev,dev.linux.lists.mfd,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel,org.kernel.vger.linux-omap,org.kernel.vger.linux-sound
Message-ID	<[email protected]>

On Sat, 11 Jul 2026 08:01:53 +0200
"H. Nikolaus Schaller" <[email protected]> wrote:

> From: Grond <[email protected]>
> 
> On the Pandora, the APLL is actually what drives all of the audio
> clocks on the board. Since the TWL4030 is only used for capture, we
> need some way of setting the correct rate for playback streams, since
> they will not go through the TWL4030's .hw_params() code path (which
> is normally how APLL rate is set).
> 
> Signed-off-by: Grond <[email protected]>
> Signed-off-by: H. Nikolaus Schaller <[email protected]>

As a general comment: might we model this as clock provider (and maybe
that enables the usage of a generic audio-graph-card)?

Regards,
Andreas