diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-11-11 22:45:30 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-11-19 11:24:37 +0300 |
| commit | 9c3c9bc9cc980d8981f75109f3921576daf75723 (patch) | |
| tree | 809b1c63c6be09bcb2d97e9032b5cc7987df6138 /drivers/gpio/gpiolib.h | |
| parent | 615b8a969d0fb623a4067ad6afa9590ca5dcaf63 (diff) | |
| download | linux-9c3c9bc9cc980d8981f75109f3921576daf75723.tar.xz | |
gpiolib: tighten up ACPI legacy gpio lookups
We should not fall back to the legacy unnamed gpio lookup style if the
driver requests gpios with different names, because we'll give out the same
gpio twice. Let's keep track of the names that were used for the device and
only do the fallback for the first name used.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 98ab08c0aa2d..2b87cbd68478 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -47,6 +47,8 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode, struct acpi_gpio_info *info); int acpi_gpio_count(struct device *dev, const char *con_id); + +bool acpi_can_fallback_to_crs(struct acpi_device *adev, const char *con_id); #else static inline void acpi_gpiochip_add(struct gpio_chip *chip) { } static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { } @@ -73,6 +75,12 @@ static inline int acpi_gpio_count(struct device *dev, const char *con_id) { return -ENODEV; } + +static inline bool acpi_can_fallback_to_crs(struct acpi_device *adev, + const char *con_id) +{ + return false; +} #endif struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np, |