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Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0148-pinctrl-bcm2835-Clear-the-event-latch-register-when-.patch')
-rw-r--r--target/linux/brcm2708/patches-4.1/0148-pinctrl-bcm2835-Clear-the-event-latch-register-when-.patch37
1 files changed, 0 insertions, 37 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0148-pinctrl-bcm2835-Clear-the-event-latch-register-when-.patch b/target/linux/brcm2708/patches-4.1/0148-pinctrl-bcm2835-Clear-the-event-latch-register-when-.patch
deleted file mode 100644
index 98bdd633f8..0000000000
--- a/target/linux/brcm2708/patches-4.1/0148-pinctrl-bcm2835-Clear-the-event-latch-register-when-.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-From 40ee1dabb8df5411a688fe483f25358d8f142884 Mon Sep 17 00:00:00 2001
-From: Jonathan Bell <jonathan@raspberrypi.org>
-Date: Tue, 30 Jun 2015 12:35:39 +0100
-Subject: [PATCH 148/222] pinctrl: bcm2835: Clear the event latch register when
- disabling interrupts
-
-It's possible to hit a race condition if interrupts are generated on a GPIO
-pin when the IRQ line in question is being disabled.
-
-If the interrupt is freed, bcm2835_gpio_irq_disable() is called which
-disables the event generation sources (edge, level). If an event occurred
-between the last disabling of hard IRQs and the write to the event
-source registers, a bit would be set in the GPIO event detect register
-(GPEDSn) which goes unacknowledged by bcm2835_gpio_irq_handler()
-so Linux complains loudly.
-
-There is no per-GPIO mask register, so when disabling GPIO interrupts
-write 1 to the relevant bit in GPEDSn to clear out any stale events.
-
-Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
-Acked-by: Stephen Warren <swarren@wwwdotorg.org>
-Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
----
- drivers/pinctrl/bcm/pinctrl-bcm2835.c | 2 ++
- 1 file changed, 2 insertions(+)
-
---- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
-+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
-@@ -503,6 +503,8 @@ static void bcm2835_gpio_irq_disable(str
-
- spin_lock_irqsave(&pc->irq_lock[bank], flags);
- bcm2835_gpio_irq_config(pc, gpio, false);
-+ /* Clear events that were latched prior to clearing event sources */
-+ bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
- clear_bit(offset, &pc->enabled_irq_map[bank]);
- spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
- }