linux-kernel - [PATCH] ASoC: cs42l42: Remove unused runtime_suspend/runtime

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Date:   Mon, 18 Oct 2021 17:44:31 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH] ASoC: cs42l42: Remove unused runtime_suspend/runtime_resume callbacks

The driver has runtime_suspend and runtime_resume callbacks, but
pm_runtime is never enabled so these functions won't be called. They
could not be used anyway because the runtime_suspend would cause jack
detect to stop working.

These functions are unused - delete them.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 sound/soc/codecs/cs42l42.c | 51 +---------------------------------------------
 1 file changed, 1 insertion(+), 50 deletions(-)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 5e4d6791756b..0dbe4e23194b 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -25,7 +25,6 @@
 #include <linux/regulator/consumer.h>
 #include <linux/gpio/consumer.h>
 #include <linux/of_device.h>
-#include <linux/pm_runtime.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -2175,59 +2174,12 @@ static int cs42l42_i2c_remove(struct i2c_client *i2c_client)
 	if (i2c_client->irq)
 		devm_free_irq(&i2c_client->dev, i2c_client->irq, cs42l42);
 
-	pm_runtime_suspend(&i2c_client->dev);
-	pm_runtime_disable(&i2c_client->dev);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int cs42l42_runtime_suspend(struct device *dev)
-{
-	struct cs42l42_private *cs42l42 = dev_get_drvdata(dev);
-
-	regcache_cache_only(cs42l42->regmap, true);
-	regcache_mark_dirty(cs42l42->regmap);
-
-	/* Hold down reset */
 	gpiod_set_value_cansleep(cs42l42->reset_gpio, 0);
-
-	/* remove power */
-	regulator_bulk_disable(ARRAY_SIZE(cs42l42->supplies),
-				cs42l42->supplies);
+	regulator_bulk_disable(ARRAY_SIZE(cs42l42->supplies), cs42l42->supplies);
 
 	return 0;
 }
 
-static int cs42l42_runtime_resume(struct device *dev)
-{
-	struct cs42l42_private *cs42l42 = dev_get_drvdata(dev);
-	int ret;
-
-	/* Enable power */
-	ret = regulator_bulk_enable(ARRAY_SIZE(cs42l42->supplies),
-					cs42l42->supplies);
-	if (ret != 0) {
-		dev_err(dev, "Failed to enable supplies: %d\n",
-			ret);
-		return ret;
-	}
-
-	gpiod_set_value_cansleep(cs42l42->reset_gpio, 1);
-	usleep_range(CS42L42_BOOT_TIME_US, CS42L42_BOOT_TIME_US * 2);
-
-	regcache_cache_only(cs42l42->regmap, false);
-	regcache_sync(cs42l42->regmap);
-
-	return 0;
-}
-#endif
-
-static const struct dev_pm_ops cs42l42_runtime_pm = {
-	SET_RUNTIME_PM_OPS(cs42l42_runtime_suspend, cs42l42_runtime_resume,
-			   NULL)
-};
-
 #ifdef CONFIG_OF
 static const struct of_device_id cs42l42_of_match[] = {
 	{ .compatible = "cirrus,cs42l42", },
@@ -2254,7 +2206,6 @@ MODULE_DEVICE_TABLE(i2c, cs42l42_id);
 static struct i2c_driver cs42l42_i2c_driver = {
 	.driver = {
 		.name = "cs42l42",
-		.pm = &cs42l42_runtime_pm,
 		.of_match_table = of_match_ptr(cs42l42_of_match),
 		.acpi_match_table = ACPI_PTR(cs42l42_acpi_match),
 		},
-- 
2.11.0