*/
#include <linux/errno.h>
+#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
#include <linux/export.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
+#include <linux/pinctrl/pinctrl.h>
#include "gpiolib.h"
return ACPI_HANDLE(gc->dev) == data;
}
+#ifdef CONFIG_PINCTRL
+/**
+ * acpi_gpiochip_pin_to_gpio_offset() - translates ACPI GPIO to Linux GPIO
+ * @chip: GPIO chip
+ * @pin: ACPI GPIO pin number from GpioIo/GpioInt resource
+ *
+ * Function takes ACPI GpioIo/GpioInt pin number as a parameter and
+ * translates it to a corresponding offset suitable to be passed to a
+ * GPIO controller driver.
+ *
+ * Typically the returned offset is same as @pin, but if the GPIO
+ * controller uses pin controller and the mapping is not contigous the
+ * offset might be different.
+ */
+static int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip, int pin)
+{
+ struct gpio_pin_range *pin_range;
+
+ /* If there are no ranges in this chip, use 1:1 mapping */
+ if (list_empty(&chip->pin_ranges))
+ return pin;
+
+ list_for_each_entry(pin_range, &chip->pin_ranges, node) {
+ const struct pinctrl_gpio_range *range = &pin_range->range;
+ int i;
+
+ if (range->pins) {
+ for (i = 0; i < range->npins; i++) {
+ if (range->pins[i] == pin)
+ return range->base + i - chip->base;
+ }
+ } else {
+ if (pin >= range->pin_base &&
+ pin < range->pin_base + range->npins) {
+ unsigned gpio_base;
+
+ gpio_base = range->base - chip->base;
+ return gpio_base + pin - range->pin_base;
+ }
+ }
+ }
+
+ return -EINVAL;
+}
+#else
+static inline int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip,
+ int pin)
+{
+ return pin;
+}
+#endif
+
/**
* acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API
* @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
struct gpio_chip *chip;
acpi_handle handle;
acpi_status status;
+ int offset;
status = acpi_get_handle(NULL, path, &handle);
if (ACPI_FAILURE(status))
if (!chip)
return ERR_PTR(-ENODEV);
- if (pin < 0 || pin > chip->ngpio)
- return ERR_PTR(-EINVAL);
+ offset = acpi_gpiochip_pin_to_gpio_offset(chip, pin);
+ if (offset < 0)
+ return ERR_PTR(offset);
- return gpiochip_get_desc(chip, pin);
+ return gpiochip_get_desc(chip, offset);
}
static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
gpiod_direction_input(desc);
- ret = gpio_lock_as_irq(chip, pin);
+ ret = gpiochip_lock_as_irq(chip, pin);
if (ret) {
dev_err(chip->dev, "Failed to lock GPIO as interrupt\n");
goto fail_free_desc;
fail_free_event:
kfree(event);
fail_unlock_irq:
- gpio_unlock_as_irq(chip, pin);
+ gpiochip_unlock_as_irq(chip, pin);
fail_free_desc:
gpiochip_free_own_desc(desc);
desc = event->desc;
if (WARN_ON(IS_ERR(desc)))
continue;
- gpio_unlock_as_irq(chip, event->pin);
+ gpiochip_unlock_as_irq(chip, event->pin);
gpiochip_free_own_desc(desc);
list_del(&event->node);
kfree(event);