linux-kernel - [PATCH 17/18] gpio: gpiolib-acpi: Export acpi_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201130133129.1024662-18-djrscally@gmail.com>
Date:   Mon, 30 Nov 2020 13:31:28 +0000
From:   Daniel Scally <djrscally@...il.com>
To:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-media@...r.kernel.org, devel@...ica.org
Cc:     rjw@...ysocki.net, lenb@...nel.org, gregkh@...uxfoundation.org,
        mika.westerberg@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
        linus.walleij@...aro.org, bgolaszewski@...libre.com,
        wsa@...nel.org, yong.zhi@...el.com, sakari.ailus@...ux.intel.com,
        bingbu.cao@...el.com, tian.shu.qiu@...el.com, mchehab@...nel.org,
        robert.moore@...el.com, erik.kaneda@...el.com, pmladek@...e.com,
        rostedt@...dmis.org, sergey.senozhatsky@...il.com,
        linux@...musvillemoes.dk, kieran.bingham+renesas@...asonboard.com,
        jacopo+renesas@...ndi.org,
        laurent.pinchart+renesas@...asonboard.com,
        jorhand@...ux.microsoft.com, kitakar@...il.com,
        heikki.krogerus@...ux.intel.com
Subject: [PATCH 17/18] gpio: gpiolib-acpi: Export acpi_get_gpiod()

I need to be able to translate GPIO resources in an acpi_device's _CRS
into gpio_descs. Those are represented in _CRS as a pathname to a GPIO
device plus the pin's index number: this function is perfect for that
purpose.

Signed-off-by: Daniel Scally <djrscally@...il.com>
---
Changes since RFC v3:

	- Patch introduced

 drivers/gpio/gpiolib-acpi.c | 3 ++-
 include/linux/acpi.h        | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 834a12f3219e..cfadbc263475 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -111,7 +111,7 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
  * controller does not have GPIO chip registered at the moment. This is to
  * support probe deferral.
  */
-static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
+struct gpio_desc *acpi_get_gpiod(char *path, int pin)
 {
 	struct gpio_chip *chip;
 	acpi_handle handle;
@@ -127,6 +127,7 @@ static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
 
 	return gpiochip_get_desc(chip, pin);
 }
+EXPORT_SYMBOL_GPL(acpi_get_gpiod);
 
 static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
 {
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 39263c6b52e1..737115a93138 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1066,6 +1066,7 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c
 bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
 				struct acpi_resource_gpio **agpio);
 int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index);
+struct gpio_desc *acpi_get_gpiod(char *path, int pin);
 #else
 static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
 					      struct acpi_resource_gpio **agpio)
@@ -1076,6 +1077,10 @@ static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
 {
 	return -ENXIO;
 }
+struct gpio_desc *acpi_get_gpiod(char *path, int pin)
+{
+	return NULL;
+}
 #endif
 
 /* Device properties */
-- 
2.25.1