linux-kernel - [PATCH v5 16/17] ASoC: tegra30: ahub: Correct suspend-resume callbacks

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Date:   Sun, 14 Mar 2021 18:44:58 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Paul Fertser <fercerpav@...il.com>
Cc:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 16/17] ASoC: tegra30: ahub: Correct suspend-resume callbacks

Tegra30 AHUB driver always syncs hardware state on a runtime PM resume,
hence there is no needed to re-sync the state on system resume. Replace
the suspend-resume callbacks with a generic helpers which ensure that
AHUB is suspended using RPM callbacks across system suspend-resume.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 sound/soc/tegra/tegra30_ahub.c | 29 ++---------------------------
 1 file changed, 2 insertions(+), 27 deletions(-)

diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
index 409a259e6343..e64b41bc5fdf 100644
--- a/sound/soc/tegra/tegra30_ahub.c
+++ b/sound/soc/tegra/tegra30_ahub.c
@@ -613,36 +613,11 @@ static int tegra30_ahub_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int tegra30_ahub_suspend(struct device *dev)
-{
-	regcache_mark_dirty(ahub->regmap_ahub);
-	regcache_mark_dirty(ahub->regmap_apbif);
-
-	return 0;
-}
-
-static int tegra30_ahub_resume(struct device *dev)
-{
-	int ret;
-
-	ret = pm_runtime_get_sync(dev);
-	if (ret < 0) {
-		pm_runtime_put(dev);
-		return ret;
-	}
-	ret = regcache_sync(ahub->regmap_ahub);
-	ret |= regcache_sync(ahub->regmap_apbif);
-	pm_runtime_put(dev);
-
-	return ret;
-}
-#endif
-
 static const struct dev_pm_ops tegra30_ahub_pm_ops = {
 	SET_RUNTIME_PM_OPS(tegra30_ahub_runtime_suspend,
 			   tegra30_ahub_runtime_resume, NULL)
-	SET_SYSTEM_SLEEP_PM_OPS(tegra30_ahub_suspend, tegra30_ahub_resume)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
 };
 
 static struct platform_driver tegra30_ahub_driver = {
-- 
2.30.2