linux-kernel - [PATCH 4/5] gpio: sysfs: emit chardev line-state events on active-low changes

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Message-Id: <20241024-gpio-notify-sysfs-v1-4-981f2773e785@linaro.org>
Date: Thu, 24 Oct 2024 13:32:47 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Kent Gibson <warthog618@...il.com>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 4/5] gpio: sysfs: emit chardev line-state events on
 active-low changes

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

The sysfs active_low attribute doesn't go through the usual paths so it
doesn't emit the line-state event. Add the missing call to
gpiod_line_state_notify() to gpio_sysfs_set_active_low().

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpiolib-sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c
index 3f24bf278b77..b967b76ea046 100644
--- a/drivers/gpio/gpiolib-sysfs.c
+++ b/drivers/gpio/gpiolib-sysfs.c
@@ -305,6 +305,8 @@ static int gpio_sysfs_set_active_low(struct device *dev, int value)
 		status = gpio_sysfs_request_irq(dev, flags);
 	}
 
+	gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_CONFIG);
+
 	return status;
 }
 

-- 
2.45.2