1 files changed, 56 insertions, 44 deletions

diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c
index d264b099182d..2318057a309b 100644
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -252,23 +252,13 @@ static int byt_irq_type(struct irq_data *d, unsigned type)
 	value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG |
 		   BYT_TRIG_LVL);
 
-	switch (type) {
-	case IRQ_TYPE_LEVEL_HIGH:
-		value |= BYT_TRIG_LVL;
-	case IRQ_TYPE_EDGE_RISING:
-		value |= BYT_TRIG_POS;
-		break;
-	case IRQ_TYPE_LEVEL_LOW:
-		value |= BYT_TRIG_LVL;
-	case IRQ_TYPE_EDGE_FALLING:
-		value |= BYT_TRIG_NEG;
-		break;
-	case IRQ_TYPE_EDGE_BOTH:
-		value |= (BYT_TRIG_NEG | BYT_TRIG_POS);
-		break;
-	}
 	writel(value, reg);
 
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		__irq_set_handler_locked(d->irq, handle_edge_irq);
+	else if (type & IRQ_TYPE_LEVEL_MASK)
+		__irq_set_handler_locked(d->irq, handle_level_irq);
+
 	spin_unlock_irqrestore(&vg->lock, flags);
 
 	return 0;
@@ -426,58 +416,80 @@ static void byt_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
 	struct irq_data *data = irq_desc_get_irq_data(desc);
 	struct byt_gpio *vg = to_byt_gpio(irq_desc_get_handler_data(desc));
 	struct irq_chip *chip = irq_data_get_irq_chip(data);
-	u32 base, pin, mask;
+	u32 base, pin;
 	void __iomem *reg;
-	u32 pending;
+	unsigned long pending;
 	unsigned virq;
-	int looplimit = 0;
 
 	/* check from GPIO controller which pin triggered the interrupt */
 	for (base = 0; base < vg->chip.ngpio; base += 32) {
-
 		reg = byt_gpio_reg(&vg->chip, base, BYT_INT_STAT_REG);
-
-		while ((pending = readl(reg))) {
-			pin = __ffs(pending);
-			mask = BIT(pin);
-			/* Clear before handling so we can't lose an edge */
-			writel(mask, reg);
-
+		pending = readl(reg);
+		for_each_set_bit(pin, &pending, 32) {
 			virq = irq_find_mapping(vg->chip.irqdomain, base + pin);
 			generic_handle_irq(virq);
-
-			/* In case bios or user sets triggering incorretly a pin
-			 * might remain in "interrupt triggered" state.
-			 */
-			if (looplimit++ > 32) {
-				dev_err(&vg->pdev->dev,
-					"Gpio %d interrupt flood, disabling\n",
-					base + pin);
-
-				reg = byt_gpio_reg(&vg->chip, base + pin,
-						   BYT_CONF0_REG);
-				mask = readl(reg);
-				mask &= ~(BYT_TRIG_NEG | BYT_TRIG_POS |
-					  BYT_TRIG_LVL);
-				writel(mask, reg);
-				mask = readl(reg); /* flush */
-				break;
-			}
 		}
 	}
 	chip->irq_eoi(data);
 }
 
+static void byt_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct byt_gpio *vg = to_byt_gpio(gc);
+	unsigned offset = irqd_to_hwirq(d);
+	void __iomem *reg;
+
+	reg = byt_gpio_reg(&vg->chip, offset, BYT_INT_STAT_REG);
+	writel(BIT(offset % 32), reg);
+}
+
 static void byt_irq_unmask(struct irq_data *d)
 {
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct byt_gpio *vg = to_byt_gpio(gc);
+	unsigned offset = irqd_to_hwirq(d);
+	unsigned long flags;
+	void __iomem *reg;
+	u32 value;
+
+	spin_lock_irqsave(&vg->lock, flags);
+
+	reg = byt_gpio_reg(&vg->chip, offset, BYT_CONF0_REG);
+	value = readl(reg);
+
+	switch (irqd_get_trigger_type(d)) {
+	case IRQ_TYPE_LEVEL_HIGH:
+		value |= BYT_TRIG_LVL;
+	case IRQ_TYPE_EDGE_RISING:
+		value |= BYT_TRIG_POS;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		value |= BYT_TRIG_LVL;
+	case IRQ_TYPE_EDGE_FALLING:
+		value |= BYT_TRIG_NEG;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		value |= (BYT_TRIG_NEG | BYT_TRIG_POS);
+		break;
+	}
+
+	writel(value, reg);
+
+	spin_unlock_irqrestore(&vg->lock, flags);
 }
 
 static void byt_irq_mask(struct irq_data *d)
 {
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct byt_gpio *vg = to_byt_gpio(gc);
+
+	byt_gpio_clear_triggering(vg, irqd_to_hwirq(d));
 }
 
 static struct irq_chip byt_irqchip = {
 	.name = "BYT-GPIO",
+	.irq_ack = byt_irq_ack,
 	.irq_mask = byt_irq_mask,
 	.irq_unmask = byt_irq_unmask,
 	.irq_set_type = byt_irq_type,