ASoC: tas2781-i2c: Drop weird GPIO code

The tas2781-i2c driver gets an IRQ from either ACPI or device tree,
then proceeds to check if the IRQ has a corresponding GPIO and in
case it does enforce the GPIO as input and set a label on it.

This is abuse of the API:

- First we cannot guarantee that the numberspaces of the GPIOs and
  the IRQs are the same, i.e that an IRQ number corresponds to
  a GPIO number like that.

- Second, GPIO chips and IRQ chips should be treated as orthogonal
  APIs, the irqchip needs to ascertain that the backing GPIO line
  is set to input etc just using the irqchip.

- Third it is using the legacy <linux/gpio.h> API which should not
  be used in new code yet this was added just a year ago.

Delete the offending code.

If this creates problems the GPIO and irqchip maintainers can help
to fix the issues.

It *should* not create any problems, because the irq isn't
used anywhere in the driver, it's just obtained and then
left unused.

Fixes: ef3bcde ("ASoC: tas2781: Add tas2781 driver")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patch.msgid.link/20240807-asoc-tas-gpios-v2-1-bd0f2705d58b@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/tas2781.h

@@ -81,19 +81,13 @@ struct tasdevice {
 	bool is_loaderr;
 };
 
-struct tasdevice_irqinfo {
-	int irq_gpio;
-	int irq;
-};
-
 struct calidata {
 	unsigned char *data;
 	unsigned long total_sz;
 };
 
 struct tasdevice_priv {
 	struct tasdevice tasdevice[TASDEVICE_MAX_CHANNELS];
-	struct tasdevice_irqinfo irq_info;
 	struct tasdevice_rca rcabin;
 	struct calidata cali_data;
 	struct tasdevice_fw *fmw;
@@ -115,6 +109,7 @@ struct tasdevice_priv {
 	unsigned int chip_id;
 	unsigned int sysclk;
 
+	int irq;
 	int cur_prog;
 	int cur_conf;
 	int fw_state;

sound/pci/hda/tas2781_hda_i2c.c

@@ -814,7 +814,7 @@ static int tas2781_hda_i2c_probe(struct i2c_client *clt)
 	} else
 		return -ENODEV;
 
-	tas_hda->priv->irq_info.irq = clt->irq;
+	tas_hda->priv->irq = clt->irq;
 	ret = tas2781_read_acpi(tas_hda->priv, device_name);
 	if (ret)
 		return dev_err_probe(tas_hda->dev, ret,

sound/soc/codecs/tas2781-comlib.c

@@ -14,7 +14,6 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
@@ -411,8 +410,6 @@ EXPORT_SYMBOL_GPL(tasdevice_dsp_remove);
 
 void tasdevice_remove(struct tasdevice_priv *tas_priv)
 {
-	if (gpio_is_valid(tas_priv->irq_info.irq_gpio))
-		gpio_free(tas_priv->irq_info.irq_gpio);
 	mutex_destroy(&tas_priv->codec_lock);
 }
 EXPORT_SYMBOL_GPL(tasdevice_remove);

sound/soc/codecs/tas2781-fmwlib.c

@@ -13,7 +13,6 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>

sound/soc/codecs/tas2781-i2c.c

@@ -22,7 +22,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
@@ -758,7 +757,7 @@ static void tasdevice_parse_dt(struct tasdevice_priv *tas_priv)
 {
 	struct i2c_client *client = (struct i2c_client *)tas_priv->client;
 	unsigned int dev_addrs[TASDEVICE_MAX_CHANNELS];
-	int rc, i, ndev = 0;
+	int i, ndev = 0;
 
 	if (tas_priv->isacpi) {
 		ndev = device_property_read_u32_array(&client->dev,
@@ -773,7 +772,7 @@ static void tasdevice_parse_dt(struct tasdevice_priv *tas_priv)
 				"ti,audio-slots", dev_addrs, ndev);
 		}
 
-		tas_priv->irq_info.irq_gpio =
+		tas_priv->irq =
 			acpi_dev_gpio_irq_get(ACPI_COMPANION(&client->dev), 0);
 	} else if (IS_ENABLED(CONFIG_OF)) {
 		struct device_node *np = tas_priv->dev->of_node;
@@ -785,7 +784,7 @@ static void tasdevice_parse_dt(struct tasdevice_priv *tas_priv)
 			dev_addrs[ndev++] = addr;
 		}
 
-		tas_priv->irq_info.irq_gpio = of_irq_get(np, 0);
+		tas_priv->irq = of_irq_get(np, 0);
 	} else {
 		ndev = 1;
 		dev_addrs[0] = client->addr;
@@ -801,23 +800,6 @@ static void tasdevice_parse_dt(struct tasdevice_priv *tas_priv)
 			__func__);
 
 	strcpy(tas_priv->dev_name, tasdevice_id[tas_priv->chip_id].name);
-
-	if (gpio_is_valid(tas_priv->irq_info.irq_gpio)) {
-		rc = gpio_request(tas_priv->irq_info.irq_gpio,
-				"AUDEV-IRQ");
-		if (!rc) {
-			gpio_direction_input(
-				tas_priv->irq_info.irq_gpio);
-
-			tas_priv->irq_info.irq =
-				gpio_to_irq(tas_priv->irq_info.irq_gpio);
-		} else
-			dev_err(tas_priv->dev, "%s: GPIO %d request error\n",
-				__func__, tas_priv->irq_info.irq_gpio);
-	} else
-		dev_err(tas_priv->dev,
-			"Looking up irq-gpio property failed %d\n",
-			tas_priv->irq_info.irq_gpio);
 }
 
 static int tasdevice_i2c_probe(struct i2c_client *i2c)