ASoC: ti: Convert TWL4030 to use GPIO descriptors

The TWL4030 is actually only ever populated from the device tree,
so we can just pass the right device and headphone jack GPIO name
to snd_soc_jack_add_gpios() and it will pick the right GPIO right
from the device tree.

The platform data patch is unused (no in-tree users of the pdata
method) but these can use GPIO descriptor tables rather than global
GPIO numbers if they need this.

Signed-off-by: Linus Walleij <[e-mail]>
Acked-by: Jarkko Nikula <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

include/linux/platform_data/omap-twl4030.h

···
 	bool	has_digimic0;
 	bool	has_digimic1;
 	u8	has_linein;
-
-	/* Jack detect GPIO or  <= 0 if it is not implemented */
-	int jack_detect;
 };
 
 #endif /* _OMAP_TWL4030_H_ */

sound/soc/ti/omap-twl4030.c

···
 #include <linux/platform_data/omap-twl4030.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>
···
 #include "omap-mcbsp.h"
 
 struct omap_twl4030 {
-	int jack_detect;	/* board can detect jack events */
 	struct snd_soc_jack hs_jack;
 };
 
···
 /* Headset jack detection gpios */
 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 	{
-		.name = "hsdet-gpio",
+		.name = "ti,jack-det",
 		.report = SND_JACK_HEADSET,
 		.debounce_time = 200,
 	},
···
 	struct omap_twl4030 *priv = snd_soc_card_get_drvdata(card);
 	int ret = 0;
 
-	/* Headset jack detection only if it is supported */
-	if (priv->jack_detect > 0) {
-		hs_jack_gpios[0].gpio = priv->jack_detect;
+	/*
+	 * This is a bit of a hack, but the GPIO is optional so we
+	 * only want to add the jack detection if the GPIO is there.
+	 */
+	if (of_property_present(card->dev->of_node, "ti,jack-det-gpio")) {
+		hs_jack_gpios[0].gpiod_dev = card->dev;
+		hs_jack_gpios[0].idx = 0;
 
 		ret = snd_soc_card_jack_new_pins(rtd->card, "Headset Jack",
 						 SND_JACK_HEADSET,
···
 			omap_twl4030_dai_links[1].platforms->of_node = dai_node;
 		}
 
-		priv->jack_detect = of_get_named_gpio(node,
-						      "ti,jack-det-gpio", 0);
-
 		/* Optional: audio routing can be provided */
 		prop = of_find_property(node, "ti,audio-routing", NULL);
 		if (prop) {
···
 
 		if (!pdata->voice_connected)
 			card->num_links = 1;
-
-		priv->jack_detect = pdata->jack_detect;
 	} else {
 		dev_err(&pdev->dev, "Missing pdata\n");
 		return -ENODEV;