[PATCH] mfd: wm8994: remove dead legacy-gpio code

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

The old-style gpio handling in wm8994 came from a commit 7c8844481a1c
("mfd: wm8994: Emulate level triggered interrupts if required") in
linux-3.11, but nothing in the kernel ever set the 'irq_gpio' member
in the wm8994_pdata structure, so this was always dead code.

Remove it now to reduce the dependency on the legacy gpio interfaces.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/mfd/wm8994-irq.c         | 94 ++------------------------------
 include/linux/mfd/wm8994/pdata.h |  5 --
 2 files changed, 4 insertions(+), 95 deletions(-)

diff --git a/drivers/mfd/wm8994-irq.c b/drivers/mfd/wm8994-irq.c
index 1475b1ac6983..a46cea948763 100644
--- a/drivers/mfd/wm8994-irq.c
+++ b/drivers/mfd/wm8994-irq.c
@@ -135,53 +135,9 @@ static const struct regmap_irq_chip wm8994_irq_chip = {
 	.runtime_pm = true,
 };
 
-static void wm8994_edge_irq_enable(struct irq_data *data)
-{
-}
-
-static void wm8994_edge_irq_disable(struct irq_data *data)
-{
-}
-
-static struct irq_chip wm8994_edge_irq_chip = {
-	.name			= "wm8994_edge",
-	.irq_disable		= wm8994_edge_irq_disable,
-	.irq_enable		= wm8994_edge_irq_enable,
-};
-
-static irqreturn_t wm8994_edge_irq(int irq, void *data)
-{
-	struct wm8994 *wm8994 = data;
-
-	while (gpio_get_value_cansleep(wm8994->pdata.irq_gpio))
-		handle_nested_irq(irq_find_mapping(wm8994->edge_irq, 0));
-
-	return IRQ_HANDLED;
-}
-
-static int wm8994_edge_irq_map(struct irq_domain *h, unsigned int virq,
-			       irq_hw_number_t hw)
-{
-	struct wm8994 *wm8994 = h->host_data;
-
-	irq_set_chip_data(virq, wm8994);
-	irq_set_chip_and_handler(virq, &wm8994_edge_irq_chip, handle_edge_irq);
-	irq_set_nested_thread(virq, 1);
-	irq_set_noprobe(virq);
-
-	return 0;
-}
-
-static const struct irq_domain_ops wm8994_edge_irq_ops = {
-	.map	= wm8994_edge_irq_map,
-	.xlate	= irq_domain_xlate_twocell,
-};
-
 int wm8994_irq_init(struct wm8994 *wm8994)
 {
 	int ret;
-	unsigned long irqflags;
-	struct wm8994_pdata *pdata = &wm8994->pdata;
 
 	if (!wm8994->irq) {
 		dev_warn(wm8994->dev,
@@ -190,53 +146,11 @@ int wm8994_irq_init(struct wm8994 *wm8994)
 		return 0;
 	}
 
-	/* select user or default irq flags */
-	irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
-	if (pdata->irq_flags)
-		irqflags = pdata->irq_flags;
-
 	/* use a GPIO for edge triggered controllers */
-	if (irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
-		if (gpio_to_irq(pdata->irq_gpio) != wm8994->irq) {
-			dev_warn(wm8994->dev, "IRQ %d is not GPIO %d (%d)\n",
-				 wm8994->irq, pdata->irq_gpio,
-				 gpio_to_irq(pdata->irq_gpio));
-			wm8994->irq = gpio_to_irq(pdata->irq_gpio);
-		}
-
-		ret = devm_gpio_request_one(wm8994->dev, pdata->irq_gpio,
-					    GPIOF_IN, "WM8994 IRQ");
-
-		if (ret != 0) {
-			dev_err(wm8994->dev, "Failed to get IRQ GPIO: %d\n",
-				ret);
-			return ret;
-		}
-
-		wm8994->edge_irq = irq_domain_create_linear(NULL, 1, &wm8994_edge_irq_ops, wm8994);
-
-		ret = regmap_add_irq_chip(wm8994->regmap,
-					  irq_create_mapping(wm8994->edge_irq,
-							     0),
-					  IRQF_ONESHOT,
-					  wm8994->irq_base, &wm8994_irq_chip,
-					  &wm8994->irq_data);
-		if (ret != 0) {
-			dev_err(wm8994->dev, "Failed to get IRQ: %d\n",
-				ret);
-			return ret;
-		}
-
-		ret = request_threaded_irq(wm8994->irq,
-					   NULL, wm8994_edge_irq,
-					   irqflags,
-					   "WM8994 edge", wm8994);
-	} else {
-		ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
-					  irqflags,
-					  wm8994->irq_base, &wm8994_irq_chip,
-					  &wm8994->irq_data);
-	}
+	ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
+				  IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+				  wm8994->irq_base, &wm8994_irq_chip,
+				  &wm8994->irq_data);
 
 	if (ret != 0) {
 		dev_err(wm8994->dev, "Failed to register IRQ chip: %d\n", ret);
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 6e2962ef5b81..b95a56a338c3 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -226,11 +226,6 @@ struct wm8994_pdata {
 	 * lines is mastered.
 	 */
 	int max_channels_clocked[WM8994_NUM_AIF];
-
-	/**
-	 * GPIO for the IRQ pin if host only supports edge triggering
-	 */
-	int irq_gpio;
 };
 
 #endif
-- 
2.39.5