[Patch v2 1/2] ASoC: fsl: Add i2s and pcm drivers for LPC32xx CPUs

[Piotr Wojtaszczyk]

On Tue, Jun 11, 2024 at 12:36 PM Mark Brown <broonie at kernel.org> wrote:
> > +FREESCALE SOC LPC32XX SOUND DRIVERS
> > +M:   Piotr Wojtaszczyk <piotr.wojtaszczyk at timesys.com>
> > +L:   alsa-devel at alsa-project.org (moderated for non-subscribers)
> > +L:   linuxppc-dev at lists.ozlabs.org
> > +S:   Orphan
> > +F:   sound/soc/fsl/lpc3xxx-*
> > +
>
> It seems a bit odd to add yourself as a maintainer while also marking
> the driver as orphan?
Nautel Ltd agreed to maintain this driver, I will add them.

> > +     i2s_info_p->clk = devm_clk_get(dev, "i2s_clk");
> > +     if (IS_ERR(i2s_info_p->clk))
> > +             return dev_err_probe(dev, PTR_ERR(i2s_info_p->clk), "Can't get clock\n");
> > +
> > +     i2s_info_p->clkrate = clk_get_rate(i2s_info_p->clk);
> > +     if (i2s_info_p->clkrate == 0)
> > +             return dev_err_probe(dev, -EINVAL, "Invalid returned clock rate\n");
>
> Nothing ever enables this clock.
It's enabled in lpc3xxx_i2s_startup() and disabled in lpc3xxx_i2s_shutdown().
When the clock is enabled the bit clock on I2S interface always runs.
So this is to avoid active clock when the interface isn't used.

-- 
Piotr Wojtaszczyk
Timesys