From: Daniel Scally <djrscally@gmail.com>
To: "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Daniel Scally <djrscally@gmail.com>,
Lee Jones <lee.jones@linaro.org>,
Hans de Goede <hdegoede@redhat.com>,
Maximilian Luz <luzmaximilian@gmail.com>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org,
platform-driver-x86@vger.kernel.org, devel@acpica.org
Cc: Len Brown <lenb@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Wolfram Sang <wsa@kernel.org>,
Mark Gross <mgross@linux.intel.com>,
Robert Moore <robert.moore@intel.com>,
Erik Kaneda <erik.kaneda@intel.com>,
laurent.pinchart@ideasonboard.com,
kieran.bingham@ideasonboard.com
Subject: [PATCH v5 4/6] gpiolib: acpi: Add acpi_gpio_get_io_resource()
Date: Thu, 3 Jun 2021 23:40:05 +0100 [thread overview]
Message-ID: <20210603224007.120560-5-djrscally@gmail.com> (raw)
In-Reply-To: <20210603224007.120560-1-djrscally@gmail.com>
Add a function to verify that a given acpi_resource represents an IO
type GPIO resource, and return it if so.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
Changes since v4:
- None
drivers/gpio/gpiolib-acpi.c | 23 +++++++++++++++++++++++
include/linux/acpi.h | 7 +++++++
2 files changed, 30 insertions(+)
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 684ddb35d83b..9887bb684575 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -196,6 +196,29 @@ bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
}
EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource);
+/**
+ * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO
+ * I/O resource or return False if not.
+ * @ares: Pointer to the ACPI resource to fetch
+ * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer
+ */
+bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
+ struct acpi_resource_gpio **agpio)
+{
+ struct acpi_resource_gpio *gpio;
+
+ if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
+ return false;
+
+ gpio = &ares->data.gpio;
+ if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO)
+ return false;
+
+ *agpio = gpio;
+ return true;
+}
+EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource);
+
static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio,
struct acpi_gpio_event *event)
{
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 170b9bebdb2b..e8ba7063c000 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1098,6 +1098,8 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c
#if defined(CONFIG_ACPI) && defined(CONFIG_GPIOLIB)
bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
struct acpi_resource_gpio **agpio);
+bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
+ struct acpi_resource_gpio **agpio);
int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index);
#else
static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
@@ -1105,6 +1107,11 @@ static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
{
return false;
}
+static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
+ struct acpi_resource_gpio **agpio)
+{
+ return false;
+}
static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev,
const char *name, int index)
{
--
2.25.1
next prev parent reply other threads:[~2021-06-03 22:40 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 22:40 [PATCH v5 0/6] Introduce intel_skl_int3472 module Daniel Scally
2021-06-03 22:40 ` [PATCH v5 1/6] ACPI: scan: Extend acpi_walk_dep_device_list() Daniel Scally
2021-06-03 22:40 ` [PATCH v5 2/6] ACPI: scan: Add function to fetch dependent of acpi device Daniel Scally
2021-06-07 14:52 ` Rafael J. Wysocki
2021-06-03 22:40 ` [PATCH v5 3/6] gpiolib: acpi: Export acpi_get_gpiod() Daniel Scally
2021-06-04 12:59 ` Andy Shevchenko
2021-06-04 14:09 ` Daniel Scally
2021-06-03 22:40 ` Daniel Scally [this message]
2021-06-04 13:01 ` [PATCH v5 4/6] gpiolib: acpi: Add acpi_gpio_get_io_resource() Andy Shevchenko
2021-06-04 14:09 ` Daniel Scally
2021-06-04 14:33 ` Andy Shevchenko
2021-06-04 16:54 ` Daniel Scally
2021-06-03 22:40 ` [PATCH v5 5/6] platform/x86: Add intel_skl_int3472 driver Daniel Scally
2021-06-04 1:31 ` kernel test robot
2021-06-05 23:07 ` Daniel Scally
2021-06-04 6:49 ` kernel test robot
2021-06-16 17:58 ` Hans de Goede
2021-06-16 18:08 ` Andy Shevchenko
2021-06-16 18:13 ` Hans de Goede
2021-06-16 21:42 ` Daniel Scally
2021-06-03 22:40 ` [PATCH v5 6/6] mfd: tps68470: Remove tps68470 MFD driver Daniel Scally
2021-06-17 11:14 ` Hans de Goede
2021-06-08 9:00 ` [PATCH v5 0/6] Introduce intel_skl_int3472 module Hans de Goede
2021-06-08 9:33 ` Laurent Pinchart
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