linux-kernel - [PATCH 1/4] ASoC: tas5086: Convert to GPIO descriptors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Mon, 01 Jul 2024 09:02:12 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>, 
 Baojun Xu <baojun.xu@...com>
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Shenghao Ding <13916275206@....com>, alsa-devel@...a-project.org, 
 Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 1/4] ASoC: tas5086: Convert to GPIO descriptors

Switch the driver to use GPIO descriptors.

Notice that we let the gpiolib handle line inversion for the
active low reset line (nreset !reset).

There are no upstream device trees using the tas5086 compatible
string, if there were, we would need to ascertain that they all
set the GPIO_ACTIVE_LOW flag on their GPIO lines.

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 sound/soc/codecs/tas5086.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/sound/soc/codecs/tas5086.c b/sound/soc/codecs/tas5086.c
index 6d45df3b9ba4..4bc1fdd232bb 100644
--- a/sound/soc/codecs/tas5086.c
+++ b/sound/soc/codecs/tas5086.c
@@ -24,14 +24,13 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
@@ -246,7 +245,7 @@ struct tas5086_private {
 	/* Current sample rate for de-emphasis control */
 	int		rate;
 	/* GPIO driving Reset pin, if any */
-	int		gpio_nreset;
+	struct gpio_desc *reset;
 	struct		regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
 };
 
@@ -462,11 +461,11 @@ static int tas5086_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 
 static void tas5086_reset(struct tas5086_private *priv)
 {
-	if (gpio_is_valid(priv->gpio_nreset)) {
+	if (priv->reset) {
 		/* Reset codec - minimum assertion time is 400ns */
-		gpio_direction_output(priv->gpio_nreset, 0);
+		gpiod_direction_output(priv->reset, 1);
 		udelay(1);
-		gpio_set_value(priv->gpio_nreset, 1);
+		gpiod_set_value(priv->reset, 0);
 
 		/* Codec needs ~15ms to wake up */
 		msleep(15);
@@ -867,9 +866,9 @@ static void tas5086_remove(struct snd_soc_component *component)
 {
 	struct tas5086_private *priv = snd_soc_component_get_drvdata(component);
 
-	if (gpio_is_valid(priv->gpio_nreset))
+	if (priv->reset)
 		/* Set codec to the reset state */
-		gpio_set_value(priv->gpio_nreset, 0);
+		gpiod_set_value(priv->reset, 1);
 
 	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
 };
@@ -914,7 +913,6 @@ static int tas5086_i2c_probe(struct i2c_client *i2c)
 {
 	struct tas5086_private *priv;
 	struct device *dev = &i2c->dev;
-	int gpio_nreset = -EINVAL;
 	int i, ret;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -940,12 +938,11 @@ static int tas5086_i2c_probe(struct i2c_client *i2c)
 
 	i2c_set_clientdata(i2c, priv);
 
-	gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
-	if (gpio_is_valid(gpio_nreset))
-		if (devm_gpio_request(dev, gpio_nreset, "TAS5086 Reset"))
-			gpio_nreset = -EINVAL;
-
-	priv->gpio_nreset = gpio_nreset;
+	/* Request line asserted */
+	priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(priv->reset))
+		return PTR_ERR(priv->reset);
+	gpiod_set_consumer_name(priv->reset, "TAS5086 Reset");
 
 	ret = regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
 	if (ret < 0) {

-- 
2.45.2