mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-02-15 04:42:02 +00:00
55 lines
1.9 KiB
Diff
55 lines
1.9 KiB
Diff
From bb6337701e7dee4f4fd0f4f7ef2eb926110f9aec Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Tue, 24 Apr 2018 14:42:27 +0100
|
|
Subject: [PATCH 245/726] gpiolib: Don't prevent IRQ usage of output GPIOs
|
|
|
|
Upstream Linux deems using output GPIOs to generate IRQs as a bogus
|
|
use case, even though the BCM2835 GPIO controller is capable of doing
|
|
so. A number of users would like to make use of this facility, so
|
|
disable the checks.
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/2527
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
drivers/gpio/gpiolib.c | 10 ++++++----
|
|
1 file changed, 6 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
|
|
index 5974cfc61b41..ed3df6f43f05 100644
|
|
--- a/drivers/gpio/gpiolib.c
|
|
+++ b/drivers/gpio/gpiolib.c
|
|
@@ -52,6 +52,8 @@
|
|
#define extra_checks 0
|
|
#endif
|
|
|
|
+#define dont_test_bit(b,d) (0)
|
|
+
|
|
/* Device and char device-related information */
|
|
static DEFINE_IDA(gpio_ida);
|
|
static dev_t gpio_devt;
|
|
@@ -2414,8 +2416,8 @@ int gpiod_direction_output(struct gpio_desc *desc, int value)
|
|
value = !!value;
|
|
|
|
/* GPIOs used for enabled IRQs shall not be set as output */
|
|
- if (test_bit(FLAG_USED_AS_IRQ, &desc->flags) &&
|
|
- test_bit(FLAG_IRQ_IS_ENABLED, &desc->flags)) {
|
|
+ if (dont_test_bit(FLAG_USED_AS_IRQ, &desc->flags) &&
|
|
+ dont_test_bit(FLAG_IRQ_IS_ENABLED, &desc->flags)) {
|
|
gpiod_err(desc,
|
|
"%s: tried to set a GPIO tied to an IRQ as output\n",
|
|
__func__);
|
|
@@ -3293,8 +3295,8 @@ int gpiochip_lock_as_irq(struct gpio_chip *gc, unsigned int offset)
|
|
}
|
|
|
|
/* To be valid for IRQ the line needs to be input or open drain */
|
|
- if (test_bit(FLAG_IS_OUT, &desc->flags) &&
|
|
- !test_bit(FLAG_OPEN_DRAIN, &desc->flags)) {
|
|
+ if (dont_test_bit(FLAG_IS_OUT, &desc->flags) &&
|
|
+ !dont_test_bit(FLAG_OPEN_DRAIN, &desc->flags)) {
|
|
chip_err(gc,
|
|
"%s: tried to flag a GPIO set as output for IRQ\n",
|
|
__func__);
|
|
--
|
|
2.33.1
|
|
|