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b299002877
Refreshed patches, removed upstreamed patches: oxnas: 003-ARM-dts-oxnas-Fix-clear-mask-property.patch generic: 184-USB-serial-option-add-Wistron-Neweb-D19Q1.patch Run tested: apu2, qemu-x86-64, apalis Build tested: sunxi/a53, imx6, x86/64, ipq40xx Tested-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk> [apu2] Signed-off-by: Petr Štetiar <ynezz@true.cz>
49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
From 122b21149cada59805040895f3d679ceb0e00063 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Tue, 24 Apr 2018 14:42:27 +0100
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Subject: [PATCH] gpiolib: Don't prevent IRQ usage of output GPIOs
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Upstream Linux deems using output GPIOs to generate IRQs as a bogus
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use case, even though the BCM2835 GPIO controller is capable of doing
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so. A number of users would like to make use of this facility, so
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disable the checks.
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See: https://github.com/raspberrypi/linux/issues/2527
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/gpio/gpiolib.c | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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--- a/drivers/gpio/gpiolib.c
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+++ b/drivers/gpio/gpiolib.c
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@@ -55,6 +55,8 @@
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#define extra_checks 0
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#endif
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+#define dont_test_bit(b,d) (0)
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+
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/* Device and char device-related information */
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static DEFINE_IDA(gpio_ida);
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static dev_t gpio_devt;
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@@ -3091,8 +3093,8 @@ int gpiod_direction_output(struct gpio_d
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value = !!value;
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/* GPIOs used for enabled IRQs shall not be set as output */
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- if (test_bit(FLAG_USED_AS_IRQ, &desc->flags) &&
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- test_bit(FLAG_IRQ_IS_ENABLED, &desc->flags)) {
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+ if (dont_test_bit(FLAG_USED_AS_IRQ, &desc->flags) &&
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+ dont_test_bit(FLAG_IRQ_IS_ENABLED, &desc->flags)) {
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gpiod_err(desc,
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"%s: tried to set a GPIO tied to an IRQ as output\n",
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__func__);
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@@ -3894,7 +3896,7 @@ int gpiochip_lock_as_irq(struct gpio_chi
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}
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}
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- if (test_bit(FLAG_IS_OUT, &desc->flags)) {
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+ if (dont_test_bit(FLAG_IS_OUT, &desc->flags)) {
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chip_err(chip,
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"%s: tried to flag a GPIO set as output for IRQ\n",
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__func__);
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