pinctrl: exynos: Handle only unmasked wakeup interrupts

A bit in EINTxx_PEND register is set regardless of interrupt mask, which
causes spurious interrupts. To avoid them, the read value of pending
register must be masked with current interrupt mask manually.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

drivers/pinctrl/pinctrl-exynos.c

@@ -395,12 +395,15 @@ static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
 	struct exynos_weint_data *eintd = irq_get_handler_data(irq);
 	struct samsung_pinctrl_drv_data *d = eintd->domain->host_data;
 	unsigned long pend;
+	unsigned long mask;
 
 	chained_irq_enter(chip, desc);
 	pend = readl(d->virt_base + d->ctrl->weint_pend + 0x8);
-	exynos_irq_demux_eint(16, pend, eintd->domain);
+	mask = readl(d->virt_base + d->ctrl->weint_mask + 0x8);
+	exynos_irq_demux_eint(16, pend & ~mask, eintd->domain);
 	pend = readl(d->virt_base + d->ctrl->weint_pend + 0xC);
-	exynos_irq_demux_eint(24, pend, eintd->domain);
+	mask = readl(d->virt_base + d->ctrl->weint_mask + 0xC);
+	exynos_irq_demux_eint(24, pend & ~mask, eintd->domain);
 	chained_irq_exit(chip, desc);
 }