ASoC: stm32: spdifrx: add pm_runtime support

Enable support of pm_runtime on STM32 SPDIFRX driver to allow
SPDIFRX power state monitoring.
Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Link: https://lore.kernel.org/r/20211119104752.13564-4-olivier.moysan@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/stm/stm32_spdifrx.c

@@ -12,6 +12,7 @@
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 
@@ -955,6 +956,7 @@ static int stm32_spdifrx_remove(struct platform_device *pdev)
 
 	snd_dmaengine_pcm_unregister(&pdev->dev);
 	snd_soc_unregister_component(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 
 	return 0;
 }
@@ -1010,6 +1012,8 @@ static int stm32_spdifrx_probe(struct platform_device *pdev)
 	udelay(2);
 	reset_control_deassert(rst);
 
+	pm_runtime_enable(&pdev->dev);
+
 	pcm_config = &stm32_spdifrx_pcm_config;
 	ret = snd_dmaengine_pcm_register(&pdev->dev, pcm_config, 0);
 	if (ret) {