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gpiolib / ACPI: allow passing GPIOF_ACTIVE_LOW for GpioInt resources
The ACPI GpioInt resources contain polarity field that is used to specify whether the interrupt is active high or low. Since gpiolib supports GPIOF_ACTIVE_LOW we can pass this information in the flags field in acpi_find_gpio(), analogous to the DeviceTree version. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -253,6 +253,8 @@ static int acpi_find_gpio(struct acpi_resource *ares, void *data)
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agpio->pin_table[0]);
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lookup->info.gpioint =
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agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
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lookup->info.active_low =
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agpio->polarity == ACPI_ACTIVE_LOW;
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}
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return 1;
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@ -2264,7 +2264,17 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
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static struct gpio_desc *acpi_find_gpio(struct device *dev, const char *con_id,
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unsigned int idx, unsigned long *flags)
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{
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return acpi_get_gpiod_by_index(dev, idx, NULL);
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struct acpi_gpio_info info;
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struct gpio_desc *desc;
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desc = acpi_get_gpiod_by_index(dev, idx, &info);
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if (IS_ERR(desc))
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return desc;
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if (info.gpioint && info.active_low)
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*flags |= GPIOF_ACTIVE_LOW;
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return desc;
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}
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static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
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@ -10,9 +10,11 @@
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/**
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* struct acpi_gpio_info - ACPI GPIO specific information
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* @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
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* @active_low: in case of @gpioint, the pin is active low
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*/
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struct acpi_gpio_info {
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bool gpioint;
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bool active_low;
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};
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#ifdef CONFIG_GPIO_ACPI
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