1 files changed, 24 insertions, 1 deletions

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 3ac740b36508..c58a5643da60 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -752,7 +752,7 @@ static void msm_gpio_irq_mask(struct irq_data *d)
 	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
 }
 
-static void msm_gpio_irq_unmask(struct irq_data *d)
+static void msm_gpio_irq_clear_unmask(struct irq_data *d, bool status_clear)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
@@ -764,6 +764,17 @@ static void msm_gpio_irq_unmask(struct irq_data *d)
 
 	raw_spin_lock_irqsave(&pctrl->lock, flags);
 
+	if (status_clear) {
+		/*
+		 * clear the interrupt status bit before unmask to avoid
+		 * any erroneous interrupts that would have got latched
+		 * when the interrupt is not in use.
+		 */
+		val = msm_readl_intr_status(pctrl, g);
+		val &= ~BIT(g->intr_status_bit);
+		msm_writel_intr_status(val, pctrl, g);
+	}
+
 	val = msm_readl_intr_cfg(pctrl, g);
 	val |= BIT(g->intr_raw_status_bit);
 	val |= BIT(g->intr_enable_bit);
@@ -774,6 +785,17 @@ static void msm_gpio_irq_unmask(struct irq_data *d)
 	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
 }
 
+static void msm_gpio_irq_enable(struct irq_data *d)
+{
+
+	msm_gpio_irq_clear_unmask(d, true);
+}
+
+static void msm_gpio_irq_unmask(struct irq_data *d)
+{
+	msm_gpio_irq_clear_unmask(d, false);
+}
+
 static void msm_gpio_irq_ack(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
@@ -1004,6 +1026,7 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
 	chip->need_valid_mask = msm_gpio_needs_valid_mask(pctrl);
 
 	pctrl->irq_chip.name = "msmgpio";
+	pctrl->irq_chip.irq_enable = msm_gpio_irq_enable;
 	pctrl->irq_chip.irq_mask = msm_gpio_irq_mask;
 	pctrl->irq_chip.irq_unmask = msm_gpio_irq_unmask;
 	pctrl->irq_chip.irq_ack = msm_gpio_irq_ack;