You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From aeb94070e992a60cf33f0300c8317b39e3ae16db Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Tue, 24 Apr 2018 14:42:27 +0100
|
|
Subject: [PATCH 280/454] 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 | 6 ++++--
|
|
1 file changed, 4 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/gpio/gpiolib.c
|
|
+++ b/drivers/gpio/gpiolib.c
|
|
@@ -53,6 +53,8 @@
|
|
#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;
|
|
@@ -2323,7 +2325,7 @@ static int _gpiod_direction_output_raw(s
|
|
int ret;
|
|
|
|
/* GPIOs used for IRQs shall not be set as output */
|
|
- if (test_bit(FLAG_USED_AS_IRQ, &desc->flags)) {
|
|
+ if (dont_test_bit(FLAG_USED_AS_IRQ, &desc->flags)) {
|
|
gpiod_err(desc,
|
|
"%s: tried to set a GPIO tied to an IRQ as output\n",
|
|
__func__);
|
|
@@ -2849,7 +2851,7 @@ int gpiochip_lock_as_irq(struct gpio_chi
|
|
set_bit(FLAG_IS_OUT, &desc->flags);
|
|
}
|
|
|
|
- if (test_bit(FLAG_IS_OUT, &desc->flags)) {
|
|
+ if (dont_test_bit(FLAG_IS_OUT, &desc->flags)) {
|
|
chip_err(chip,
|
|
"%s: tried to flag a GPIO set as output for IRQ\n",
|
|
__func__);
|