From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Kent Gibson <warthog618@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Shuah Khan <shuah@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org,
Bartosz Golaszewski <brgl@bgdev.pl>
Subject: [PATCH v11 1/6] gpiolib: provide gpiod_remove_hogs()
Date: Tue, 30 Nov 2021 16:41:22 +0100 [thread overview]
Message-ID: <20211130154127.12272-2-brgl@bgdev.pl> (raw)
In-Reply-To: <20211130154127.12272-1-brgl@bgdev.pl>
Currently all users of gpiod_add_hogs() call it only once at system
init so there never was any need for a mechanism allowing to remove
them. Now the upcoming gpio-sim will need to tear down chips with hogged
lines so provide a function that allows to remove hogs.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
---
drivers/gpio/gpiolib.c | 11 +++++++++++
include/linux/gpio/machine.h | 2 ++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index abfbf546d159..22b98a590a88 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3540,6 +3540,17 @@ void gpiod_add_hogs(struct gpiod_hog *hogs)
}
EXPORT_SYMBOL_GPL(gpiod_add_hogs);
+void gpiod_remove_hogs(struct gpiod_hog *hogs)
+{
+ struct gpiod_hog *hog;
+
+ mutex_lock(&gpio_machine_hogs_mutex);
+ for (hog = &hogs[0]; hog->chip_label; hog++)
+ list_del(&hog->list);
+ mutex_unlock(&gpio_machine_hogs_mutex);
+}
+EXPORT_SYMBOL_GPL(gpiod_remove_hogs);
+
static struct gpiod_lookup_table *gpiod_find_lookup_table(struct device *dev)
{
const char *dev_id = dev ? dev_name(dev) : NULL;
diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h
index d755e529c1e3..2647dd10b541 100644
--- a/include/linux/gpio/machine.h
+++ b/include/linux/gpio/machine.h
@@ -100,6 +100,7 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n);
void gpiod_remove_lookup_table(struct gpiod_lookup_table *table);
void gpiod_add_hogs(struct gpiod_hog *hogs);
+void gpiod_remove_hogs(struct gpiod_hog *hogs);
#else /* ! CONFIG_GPIOLIB */
static inline
void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}
@@ -108,6 +109,7 @@ void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {}
static inline
void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {}
static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {}
+static inline void gpiod_remove_hogs(struct gpiod_hog *hogs) {}
#endif /* CONFIG_GPIOLIB */
#endif /* __LINUX_GPIO_MACHINE_H */
--
2.25.1
next prev parent reply other threads:[~2021-11-30 15:41 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-30 15:41 [PATCH v11 0/6] gpio-sim: configfs-based GPIO simulator Bartosz Golaszewski
2021-11-30 15:41 ` Bartosz Golaszewski [this message]
2021-11-30 15:41 ` [PATCH v11 2/6] gpiolib: allow to specify the firmware node in struct gpio_chip Bartosz Golaszewski
2021-11-30 16:14 ` Andy Shevchenko
2021-11-30 16:19 ` Andy Shevchenko
2021-11-30 16:55 ` Andy Shevchenko
2021-11-30 18:32 ` Bartosz Golaszewski
2021-11-30 20:31 ` Andy Shevchenko
2021-11-30 20:25 ` Bartosz Golaszewski
2021-11-30 20:59 ` Andy Shevchenko
2021-11-30 21:04 ` Bartosz Golaszewski
2021-12-01 13:11 ` Bartosz Golaszewski
2021-12-01 13:39 ` Andy Shevchenko
2021-12-01 13:53 ` Bartosz Golaszewski
2021-12-01 14:28 ` Andy Shevchenko
2021-12-01 14:33 ` Andy Shevchenko
2021-12-01 14:36 ` Bartosz Golaszewski
2021-12-01 14:54 ` Andy Shevchenko
2021-12-02 10:57 ` Andy Shevchenko
2021-12-02 11:24 ` Bartosz Golaszewski
2021-12-02 11:35 ` Andy Shevchenko
2021-12-02 11:37 ` Andy Shevchenko
2021-12-02 13:06 ` Bartosz Golaszewski
2021-12-02 13:44 ` Andy Shevchenko
2021-12-02 13:52 ` Bartosz Golaszewski
2021-12-02 15:40 ` Andy Shevchenko
2021-12-02 17:00 ` Bartosz Golaszewski
2021-12-02 17:29 ` Andy Shevchenko
2021-11-30 15:41 ` [PATCH v11 3/6] gpio: sim: new testing module Bartosz Golaszewski
2021-11-30 15:41 ` [PATCH v11 4/6] selftests: gpio: provide a helper for reading chip info Bartosz Golaszewski
2021-11-30 15:41 ` [PATCH v11 5/6] selftests: gpio: add a helper for reading GPIO line names Bartosz Golaszewski
2021-11-30 15:41 ` [PATCH v11 6/6] selftests: gpio: add test cases for gpio-sim Bartosz Golaszewski
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