From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Cc: agross@kernel.org, andersson@kernel.org, lgirdwood@gmail.com,
broonie@kernel.org, robh+dt@kernel.org, quic_plai@quicinc.com,
bgoswami@quicinc.com, perex@perex.cz, tiwai@suse.com,
srinivas.kandagatla@linaro.org, quic_rohkumar@quicinc.com,
linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org,
linux-kernel@vger.kernel.org, swboyd@chromium.org,
judyhsiao@chromium.org, devicetree@vger.kernel.org
Subject: Re: [PATCH] ASoC: qcom: lpass-sc7180: Add system suspend/resume PM ops
Date: Tue, 29 Nov 2022 11:53:10 +0100 [thread overview]
Message-ID: <CAMuHMdUfRJmy56eO=ET-Togg-EOgxSjnTgAUYWmixD_zVonipA@mail.gmail.com> (raw)
In-Reply-To: <3b00c04c-cb6d-9e9a-ba0c-0ce093b4a3fb@quicinc.com>
Hi Srinivasa,
On Tue, Nov 29, 2022 at 11:36 AM Srinivasa Rao Mandadapu
<quic_srivasam@quicinc.com> wrote:
> On 11/29/2022 1:23 PM, Geert Uytterhoeven wrote:
> > On Mon, Nov 28, 2022 at 8:50 AM Srinivasa Rao Mandadapu
> > <quic_srivasam@quicinc.com> wrote:
> >> Update lpass sc7180 platform driver with PM ops, such as
> >> system supend and resume callbacks.
> >> This update is required to disable clocks during supend and
> >> avoid XO shutdown issue.
> >>
> >> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
> >> Tested-by: Rahul Ajmeriya <quic_rajmeriy@quicinc.com>
> > Thanks for your patch, which is now commit 2d68148f8f85ca5a ("ASoC:
> > qcom: lpass-sc7180: Add system suspend/resume PM ops") in next-20221129.
> >
> >> --- a/sound/soc/qcom/lpass-sc7180.c
> >> +++ b/sound/soc/qcom/lpass-sc7180.c
> >> @@ -12,6 +12,7 @@
> >> #include <linux/module.h>
> >> #include <linux/of.h>
> >> #include <linux/platform_device.h>
> >> +#include <linux/pm_runtime.h>
> >> #include <dt-bindings/sound/sc7180-lpass.h>
> >> #include <sound/pcm.h>
> >> #include <sound/soc.h>
> >> @@ -156,10 +157,34 @@ static int sc7180_lpass_exit(struct platform_device *pdev)
> >> struct lpass_data *drvdata = platform_get_drvdata(pdev);
> >>
> >> clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks);
> >> + return 0;
> >> +}
> >> +
> >> +static int sc7180_lpass_dev_resume(struct device *dev)
> >> +{
> >> + int ret = 0;
> >> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> >>
> >> + ret = clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks);
> >> + if (ret) {
> >> + dev_err(dev, "sc7180 clk prepare and enable failed\n");
> >> + return ret;
> >> + }
> >> + return ret;
> >> +}
> >> +
> >> +static int sc7180_lpass_dev_suspend(struct device *dev)
> >> +{
> >> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> >> +
> >> + clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks);
> >> return 0;
> >> }
> > noreply@ellerman.id.au reports for e.g. m68k-allmodconfig:
> >
> > sound/soc/qcom/lpass-sc7180.c:179:12: error:
> > 'sc7180_lpass_dev_suspend' defined but not used
> > [-Werror=unused-function]
> > sound/soc/qcom/lpass-sc7180.c:166:12: error:
> > 'sc7180_lpass_dev_resume' defined but not used
> > [-Werror=unused-function]
> >
> >> +static const struct dev_pm_ops sc7180_lpass_pm_ops = {
> >> + SET_SYSTEM_SLEEP_PM_OPS(sc7180_lpass_dev_suspend, sc7180_lpass_dev_resume)
> >> +};
> > Please use DEFINE_SIMPLE_DEV_PM_OPS()...
> Actually, we need to use this patch in in previous kernels 5.4 and 5.15.
> I think these changes won't apply on previous kernel.
> Hence ignoring for now and will take care next time.
In that case you should add __maybe_unused tags to
sc7180_lpass_dev_suspend() and sc7180_lpass_dev_resume() first, so it
can be backported to 5.4 and 5.15, and do the DEFINE_SIMPLE_DEV_PM_OPS()
conversion later.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2022-11-29 10:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-28 7:49 [PATCH] ASoC: qcom: lpass-sc7180: Add system suspend/resume PM ops Srinivasa Rao Mandadapu
2022-11-28 16:39 ` Mark Brown
2022-11-28 19:40 ` Stephen Boyd
2022-11-29 7:53 ` Geert Uytterhoeven
2022-11-29 10:35 ` Srinivasa Rao Mandadapu
2022-11-29 10:53 ` Geert Uytterhoeven [this message]
2022-11-29 12:14 ` Conor Dooley
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