gpio: davinci: fix lazy disable

On a few platforms such as TI's AM69 device, disable_irq() fails to keep
track of the interrupts that happen between disable_irq() and
enable_irq() and those interrupts are missed. Use the ->irq_unmask() and
->irq_mask() methods instead of ->irq_enable() and ->irq_disable() to
correctly keep track of edges when disable_irq is called.

This solves the issue of disable_irq() not working as expected on such
platforms.

Fixes: 2326544 ("ARM: davinci: irq_data conversion.")
Signed-off-by: Emanuele Ghidoli <[email protected]>
Signed-off-by: Parth Pancholi <[email protected]>
Acked-by: Keerthy <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: eghidoli

drivers/gpio/gpio-davinci.c

@@ -253,7 +253,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
  * serve as EDMA event triggers.
  */
 
-static void gpio_irq_disable(struct irq_data *d)
+static void gpio_irq_mask(struct irq_data *d)
 {
 	struct davinci_gpio_regs __iomem *g = irq2regs(d);
 	uintptr_t mask = (uintptr_t)irq_data_get_irq_handler_data(d);
@@ -262,7 +262,7 @@ static void gpio_irq_disable(struct irq_data *d)
 	writel_relaxed(mask, &g->clr_rising);
 }
 
-static void gpio_irq_enable(struct irq_data *d)
+static void gpio_irq_unmask(struct irq_data *d)
 {
 	struct davinci_gpio_regs __iomem *g = irq2regs(d);
 	uintptr_t mask = (uintptr_t)irq_data_get_irq_handler_data(d);
@@ -288,8 +288,8 @@ static int gpio_irq_type(struct irq_data *d, unsigned trigger)
 
 static struct irq_chip gpio_irqchip = {
 	.name		= "GPIO",
-	.irq_enable	= gpio_irq_enable,
-	.irq_disable	= gpio_irq_disable,
+	.irq_unmask	= gpio_irq_unmask,
+	.irq_mask	= gpio_irq_mask,
 	.irq_set_type	= gpio_irq_type,
 	.flags		= IRQCHIP_SET_TYPE_MASKED | IRQCHIP_SKIP_SET_WAKE,
 };