Add missing CONFIG_PM ifdefs to fix this allmodconfig compile error:

drivers/clk/imx/clk-imx8mp-audiomix.c:356:12: error:
'clk_imx8mp_audiomix_runtime_suspend' defined but not used
[-Werror=unused-function]
  356 | static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Closes: https://lore.kernel.org/r/CA+G9fYuP7S+a89Ep5g5_Ad69EMwRkJ8nM+MMTzbEcP+6H2oMXQ@mail.gmail.com
Fixes: 1496dd413b2e ("clk: imx: imx8mp: Add pm_runtime support for power saving")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 drivers/clk/imx/clk-imx8mp-audiomix.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
index 574a032309c1..6549e55e94c9 100644
--- a/drivers/clk/imx/clk-imx8mp-audiomix.c
+++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
@@ -217,6 +217,8 @@ struct clk_imx8mp_audiomix_priv {
 	struct clk_hw_onecell_data clk_data;
 };
 
+#ifdef CONFIG_PM
+
 static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)
 {
 	struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev);
@@ -232,6 +234,8 @@ static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)
 	}
 }
 
+#endif /* CONFIG_PM */
+
 static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
 {
 	struct clk_imx8mp_audiomix_priv *priv;
@@ -353,6 +357,8 @@ static int clk_imx8mp_audiomix_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+
 static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev)
 {
 	clk_imx8mp_audiomix_save_restore(dev, true);
@@ -367,6 +373,8 @@ static int clk_imx8mp_audiomix_runtime_resume(struct device *dev)
 	return 0;
 }
 
+#endif /* CONFIG_PM */
+
 static const struct dev_pm_ops clk_imx8mp_audiomix_pm_ops = {
 	SET_RUNTIME_PM_OPS(clk_imx8mp_audiomix_runtime_suspend,
 			   clk_imx8mp_audiomix_runtime_resume, NULL)
-- 
2.40.1

On Tue, Apr 30, 2024, at 16:16, Heiko Carstens wrote:
> Add missing CONFIG_PM ifdefs to fix this allmodconfig compile error:
>
> drivers/clk/imx/clk-imx8mp-audiomix.c:356:12: error:
> 'clk_imx8mp_audiomix_runtime_suspend' defined but not used
> [-Werror=unused-function]
>   356 | static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> Closes: 
> https://lore.kernel.org/r/CA+G9fYuP7S+a89Ep5g5_Ad69EMwRkJ8nM+MMTzbEcP+6H2oMXQ@mail.gmail.com
> Fixes: 1496dd413b2e ("clk: imx: imx8mp: Add pm_runtime support for 
> power saving")
> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

Thanks for your patch. I see the bug as well, but
I think a better fix is to replace the deprecated
SET_RUNTIME_PM_OPS() and SET_NOIRQ_SYSTEM_SLEEP_PM_OPS()
with the modern variants, RUNTIME_PM_OPS() and
RUNTIME_PM_OPS().

      Arnd

On Tue, Apr 30, 2024 at 04:30:37PM +0200, Arnd Bergmann wrote:
> On Tue, Apr 30, 2024, at 16:16, Heiko Carstens wrote:
> > Add missing CONFIG_PM ifdefs to fix this allmodconfig compile error:
> >
> > drivers/clk/imx/clk-imx8mp-audiomix.c:356:12: error:
> > 'clk_imx8mp_audiomix_runtime_suspend' defined but not used
> > [-Werror=unused-function]
> >   356 | static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev)
> >       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > cc1: all warnings being treated as errors
> >
> > Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> > Closes: 
> > https://lore.kernel.org/r/CA+G9fYuP7S+a89Ep5g5_Ad69EMwRkJ8nM+MMTzbEcP+6H2oMXQ@mail.gmail.com
> > Fixes: 1496dd413b2e ("clk: imx: imx8mp: Add pm_runtime support for 
> > power saving")
> > Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
> 
> Thanks for your patch. I see the bug as well, but
> I think a better fix is to replace the deprecated
> SET_RUNTIME_PM_OPS() and SET_NOIRQ_SYSTEM_SLEEP_PM_OPS()
> with the modern variants, RUNTIME_PM_OPS() and
> RUNTIME_PM_OPS().

Fine with me, I leave that up to the original author then.