gpio: omap: rework omap_gpio_request to touch only gpio specific registers

The GPIO Chip and GPIO IRQ Chip functionality are essentially orthogonal,
so GPIO Chip implementation shouldn't touch GPIO IRQ specific registers
and vise versa.

Hence, rework omap_gpio_request:
- don't reset GPIO IRQ triggering type to IRQ_TYPE_NONE, because
  GPIO irqchip should be responsible for that;
- call directly omap_enable_gpio_module as all needed checks are already
  present inside it.

Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index b2fcdf4f8bd769c87d0df55d51746b958b752880..606b401d201739fca6454dff0f3ec0686f2636ed 100644 (file)
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -668,14 +668,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
                pm_runtime_get_sync(bank->dev);
 
        spin_lock_irqsave(&bank->lock, flags);
-       /* Set trigger to none. You need to enable the desired trigger with
-        * request_irq() or set_irq_type(). Only do this if the IRQ line has
-        * not already been requested.
-        */
-       if (!LINE_USED(bank->irq_usage, offset)) {
-               omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
-               omap_enable_gpio_module(bank, offset);
-       }
+       omap_enable_gpio_module(bank, offset);
        bank->mod_usage |= BIT(offset);
        spin_unlock_irqrestore(&bank->lock, flags);