diff mbox series

[B/C,4/4] Revert "pinctrl: intel: Do pin translation when lock IRQ"

Message ID 20190115090255.32442-5-kai.heng.feng@canonical.com
State New
Headers show
Series Fix non-working pinctrl-intel | expand

Commit Message

Kai-Heng Feng Jan. 15, 2019, 9:02 a.m. UTC 
From: Mika Westerberg <mika.westerberg@linux.intel.com>

BugLink: https://bugs.launchpad.net/bugs/1811777

This reverts commit 55aedef50d4d810670916d9fce4a40d5da2079e7.

Commit 55aedef50d4d ("pinctrl: intel: Do pin translation when lock IRQ")
added special translation from GPIO number to hardware pin number to
irq_reqres/relres hooks to avoid failure when IRQs are requested. The
actual failure happened inside gpiochip_lock_as_irq() because it calls
gpiod_get_direction() and pinctrl-intel.c::intel_gpio_get_direction()
implementation originally missed the translation so the two hooks made
it work by skipping the ->get_direction() call entirely (it overwrote
the default GPIOLIB provided functions).

The proper fix that adds translation to GPIO callbacks was merged with
commit 96147db1e1df ("pinctrl: intel: Do pin translation in other GPIO
operations as well"). This allows us to use the default GPIOLIB provided
functions again.

In addition as find out by Benjamin Tissoires the two functions
(intel_gpio_irq_reqres()/intel_gpio_irq_relres()) now cause problems of
their own because they operate on pin numbers and pass that pin number
to gpiochip_lock_as_irq() which actually expects a GPIO number.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=199911
Fixes: 55aedef50d4d ("pinctrl: intel: Do pin translation when lock IRQ")
Reported-and-tested-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
(backported from commit 72923e5488f0604fac8ef2c7e683fabd3b4c203b)
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
 drivers/pinctrl/intel/pinctrl-intel.c | 30 ---------------------------
 1 file changed, 30 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 77c4b75c78fb..c19a4c45f7bb 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -885,34 +885,6 @@  static const struct gpio_chip intel_gpio_chip = {
 	.set_config = gpiochip_generic_config,
 };
 
-static int intel_gpio_irq_reqres(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
-	int pin;
-
-	pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), NULL, NULL);
-	if (pin >= 0) {
-		if (gpiochip_lock_as_irq(gc, pin)) {
-			dev_err(pctrl->dev, "unable to lock HW IRQ %d for IRQ\n",
-				pin);
-			return -EINVAL;
-		}
-	}
-	return 0;
-}
-
-static void intel_gpio_irq_relres(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
-	int pin;
-
-	pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), NULL, NULL);
-	if (pin >= 0)
-		gpiochip_unlock_as_irq(gc, pin);
-}
-
 static void intel_gpio_irq_ack(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
@@ -1126,8 +1098,6 @@  static irqreturn_t intel_gpio_irq(int irq, void *data)
 
 static struct irq_chip intel_gpio_irqchip = {
 	.name = "intel-gpio",
-	.irq_request_resources = intel_gpio_irq_reqres,
-	.irq_release_resources = intel_gpio_irq_relres,
 	.irq_enable = intel_gpio_irq_enable,
 	.irq_ack = intel_gpio_irq_ack,
 	.irq_mask = intel_gpio_irq_mask,