staging: wilc1000: use 'interrupts' property instead of 'irq-gpio'

Make use of 'interrupts' property instead of using gpio for handling
the interrupt as suggested in [1].

[1]. https://lore.kernel.org/linux-wireless/20200303015558.GA6876@bogusSigned-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20200307085523.7320-2-ajay.kathat@microchip.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/netdev.c

@@ -46,29 +46,21 @@ static irqreturn_t isr_bh_routine(int irq, void *userdata)
 
 static int init_irq(struct net_device *dev)
 {
-	int ret = 0;
 	struct wilc_vif *vif = netdev_priv(dev);
 	struct wilc *wl = vif->wilc;
-
-	ret = gpiod_direction_input(wl->gpio_irq);
-	if (ret) {
-		netdev_err(dev, "could not obtain gpio for WILC_INTR\n");
-		return ret;
-	}
-
-	wl->dev_irq_num = gpiod_to_irq(wl->gpio_irq);
+	int ret;
 
 	ret = request_threaded_irq(wl->dev_irq_num, isr_uh_routine,
 				   isr_bh_routine,
 				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 				   "WILC_IRQ", dev);
-	if (ret < 0)
-		netdev_err(dev, "Failed to request IRQ\n");
-	else
-		netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n",
-			   wl->dev_irq_num);
+	if (ret) {
+		netdev_err(dev, "Failed to request IRQ [%d]\n", ret);
+		return ret;
+	}
+	netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n", wl->dev_irq_num);
 
-	return ret;
+	return 0;
 }
 
 static void deinit_irq(struct net_device *dev)
@@ -501,7 +493,7 @@ static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
 		if (ret)
 			goto fail_wilc_wlan;
 
-		if (wl->gpio_irq && init_irq(dev)) {
+		if (wl->dev_irq_num && init_irq(dev)) {
 			ret = -EIO;
 			goto fail_threads;
 		}

drivers/staging/wilc1000/netdev.h

@@ -209,7 +209,6 @@ struct wilc {
 	const struct wilc_hif_func *hif_func;
 	int io_type;
 	s8 mac_status;
-	struct gpio_desc *gpio_irq;
 	struct clk *rtc_clk;
 	bool initialized;
 	int dev_irq_num;

drivers/staging/wilc1000/sdio.c

@@ -8,6 +8,7 @@
 #include <linux/mmc/sdio_func.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/sdio.h>
+#include <linux/of_irq.h>
 
 #include "netdev.h"
 #include "cfg80211.h"
@@ -122,33 +123,32 @@ static int wilc_sdio_probe(struct sdio_func *func,
 {
 	struct wilc *wilc;
 	int ret;
-	struct gpio_desc *gpio = NULL;
 	struct wilc_sdio *sdio_priv;
 
 	sdio_priv = kzalloc(sizeof(*sdio_priv), GFP_KERNEL);
 	if (!sdio_priv)
 		return -ENOMEM;
 
-	if (IS_ENABLED(CONFIG_WILC1000_HW_OOB_INTR)) {
-		gpio = gpiod_get(&func->dev, "irq", GPIOD_IN);
-		if (IS_ERR(gpio)) {
-			/* get the GPIO descriptor from hardcode GPIO number */
-			gpio = gpio_to_desc(GPIO_NUM);
-			if (!gpio)
-				dev_err(&func->dev, "failed to get irq gpio\n");
-		}
-	}
-
 	ret = wilc_cfg80211_init(&wilc, &func->dev, WILC_HIF_SDIO,
 				 &wilc_hif_sdio);
 	if (ret) {
 		kfree(sdio_priv);
 		return ret;
 	}
+
+	if (IS_ENABLED(CONFIG_WILC1000_HW_OOB_INTR)) {
+		struct device_node *np = func->card->dev.of_node;
+		int irq_num = of_irq_get(np, 0);
+
+		if (irq_num > 0) {
+			wilc->dev_irq_num = irq_num;
+			sdio_priv->irq_gpio = true;
+		}
+	}
+
 	sdio_set_drvdata(func, wilc);
 	wilc->bus_data = sdio_priv;
 	wilc->dev = &func->dev;
-	wilc->gpio_irq = gpio;
 
 	wilc->rtc_clk = devm_clk_get(&func->card->dev, "rtc_clk");
 	if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -EPROBE_DEFER)
@@ -164,10 +164,6 @@ static void wilc_sdio_remove(struct sdio_func *func)
 {
 	struct wilc *wilc = sdio_get_drvdata(func);
 
-	/* free the GPIO in module remove */
-	if (wilc->gpio_irq)
-		gpiod_put(wilc->gpio_irq);
-
 	if (!IS_ERR(wilc->rtc_clk))
 		clk_disable_unprepare(wilc->rtc_clk);
 
@@ -592,9 +588,6 @@ static int wilc_sdio_init(struct wilc *wilc, bool resume)
 	int loop, ret;
 	u32 chipid;
 
-	if (!resume)
-		sdio_priv->irq_gpio = wilc->dev_irq_num;
-
 	/**
 	 *      function 0 csa enable
 	 **/

drivers/staging/wilc1000/spi.c

@@ -151,21 +151,12 @@ static int wilc_bus_probe(struct spi_device *spi)
 {
 	int ret;
 	struct wilc *wilc;
-	struct gpio_desc *gpio;
 	struct wilc_spi *spi_priv;
 
 	spi_priv = kzalloc(sizeof(*spi_priv), GFP_KERNEL);
 	if (!spi_priv)
 		return -ENOMEM;
 
-	gpio = gpiod_get(&spi->dev, "irq", GPIOD_IN);
-	if (IS_ERR(gpio)) {
-		/* get the GPIO descriptor from hardcode GPIO number */
-		gpio = gpio_to_desc(GPIO_NUM);
-		if (!gpio)
-			dev_err(&spi->dev, "failed to get the irq gpio\n");
-	}
-
 	ret = wilc_cfg80211_init(&wilc, &spi->dev, WILC_HIF_SPI, &wilc_hif_spi);
 	if (ret) {
 		kfree(spi_priv);
@@ -175,7 +166,7 @@ static int wilc_bus_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, wilc);
 	wilc->dev = &spi->dev;
 	wilc->bus_data = spi_priv;
-	wilc->gpio_irq = gpio;
+	wilc->dev_irq_num = spi->irq;
 
 	wilc->rtc_clk = devm_clk_get(&spi->dev, "rtc_clk");
 	if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -EPROBE_DEFER)
@@ -190,10 +181,6 @@ static int wilc_bus_remove(struct spi_device *spi)
 {
 	struct wilc *wilc = spi_get_drvdata(spi);
 
-	/* free the GPIO in module remove */
-	if (wilc->gpio_irq)
-		gpiod_put(wilc->gpio_irq);
-
 	if (!IS_ERR(wilc->rtc_clk))
 		clk_disable_unprepare(wilc->rtc_clk);
 

drivers/staging/wilc1000/wlan.h

@@ -206,7 +206,6 @@
 #define WILC_TX_BUFF_SIZE	(64 * 1024)
 
 #define MODALIAS		"WILC_SPI"
-#define GPIO_NUM		0x44
 
 #define WILC_PKT_HDR_CONFIG_FIELD	BIT(31)
 #define WILC_PKT_HDR_OFFSET_FIELD	GENMASK(30, 22)