[PATCH v3 05/13] gpiolib: acpi: Add wake_capable variants of acpi_dev_gpio_irq_get
From: Raul E Rangel <hidden>
Date: 2022-09-14 23:58:53
Also in:
linux-acpi, linux-gpio, lkml
Subsystem:
acpi, gpio acpi support, gpio subsystem, the rest · Maintainers:
"Rafael J. Wysocki", Mika Westerberg, Andy Shevchenko, Linus Walleij, Bartosz Golaszewski, Linus Torvalds
The ACPI spec defines the SharedAndWake and ExclusiveAndWake share type keywords. This is an indication that the GPIO IRQ can also be used as a wake source. This change exposes the wake_capable bit so drivers can correctly enable wake functionality instead of making an assumption. Signed-off-by: Raul E Rangel <redacted> --- Changes in v3: - Kept `acpi_dev_gpio_irq_get_by` unchanged to avoid having to touch unrelated drivers. - Converted wake_capable parameter to bool. Changes in v2: - Fixed call site in mlxbf_gige_probe drivers/gpio/gpiolib-acpi.c | 17 ++++++++++++++--- drivers/gpio/gpiolib-acpi.h | 2 ++ include/linux/acpi.h | 22 ++++++++++++++++++---- 3 files changed, 34 insertions(+), 7 deletions(-)
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 9be1376f9a627f..c703f095993a2c 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c@@ -741,6 +741,8 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) lookup->info.pin_config = agpio->pin_config; lookup->info.debounce = agpio->debounce_timeout; lookup->info.gpioint = gpioint; + lookup->info.wake_capable = agpio->wake_capable == + ACPI_WAKE_CAPABLE; /* * Polarity and triggering are only specified for GpioInt
@@ -987,10 +989,12 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode, } /** - * acpi_dev_gpio_irq_get_by() - Find GpioInt and translate it to Linux IRQ number + * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ + * number * @adev: pointer to a ACPI device to get IRQ from * @name: optional name of GpioInt resource * @index: index of GpioInt resource (starting from %0) + * @wake_capable: Set to true if the IRQ is wake capable * * If the device has one or more GpioInt resources, this function can be * used to translate from the GPIO offset in the resource to the Linux IRQ
@@ -1002,9 +1006,13 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode, * The function takes optional @name parameter. If the resource has a property * name, then only those will be taken into account. * + * The GPIO is considered wake capable if the GpioInt resource specifies + * SharedAndWake or ExclusiveAndWake. + * * Return: Linux IRQ number (> %0) on success, negative errno on failure. */ -int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index) +int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, + int index, bool *wake_capable) { int idx, i; unsigned int irq_flags;
@@ -1061,13 +1069,16 @@ int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int ind dev_dbg(&adev->dev, "IRQ %d already in use\n", irq); } + if (wake_capable) + *wake_capable = info.wake_capable; + return irq; } } return -ENOENT; } -EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get_by); +EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by); static acpi_status acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
diff --git a/drivers/gpio/gpiolib-acpi.h b/drivers/gpio/gpiolib-acpi.h
index e476558d947136..1ac6816839dbce 100644
--- a/drivers/gpio/gpiolib-acpi.h
+++ b/drivers/gpio/gpiolib-acpi.h@@ -18,6 +18,7 @@ struct acpi_device; * @pin_config: pin bias as provided by ACPI * @polarity: interrupt polarity as provided by ACPI * @triggering: triggering type as provided by ACPI + * @wake_capable: wake capability as provided by ACPI * @debounce: debounce timeout as provided by ACPI * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping */
@@ -28,6 +29,7 @@ struct acpi_gpio_info { int pin_config; int polarity; int triggering; + bool wake_capable; unsigned int debounce; unsigned int quirks; };
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 6f64b2f3dc5479..d3121cef6cc3bc 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h@@ -1202,7 +1202,8 @@ 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); +int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, + int index, bool *wake_capable); #else static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, struct acpi_resource_gpio **agpio)
@@ -1214,16 +1215,29 @@ static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares, { return false; } -static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, - const char *name, int index) +static inline int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, + const char *name, int index, + bool *wake_capable) { return -ENXIO; } #endif +static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, + const char *name, int index) +{ + return acpi_dev_gpio_irq_wake_get_by(adev, name, index, NULL); +} + static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index) { - return acpi_dev_gpio_irq_get_by(adev, NULL, index); + return acpi_dev_gpio_irq_wake_get_by(adev, NULL, index, NULL); +} + +static inline int acpi_dev_gpio_irq_wake_get(struct acpi_device *adev, + int index, bool *wake_capable) +{ + return acpi_dev_gpio_irq_wake_get_by(adev, NULL, index, wake_capable); } /* Device properties */
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2.37.3.968.ga6b4b080e4-goog