gpiolib: Introduce ->add_pin_ranges() callback
When IRQ chip is being added by GPIO library, the ACPI based platform expects GPIO <-> pin mapping ranges to be initialized in order to correctly initialize ACPI event mechanism on affected platforms. Unfortunately this step is missed. Introduce ->add_pin_ranges() callback to fill the above mentioned gap. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Hans de Goede <hdegoede@redhat.com>
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@ -390,6 +390,14 @@ static void gpiochip_free_valid_mask(struct gpio_chip *gpiochip)
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gpiochip->valid_mask = NULL;
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}
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static int gpiochip_add_pin_ranges(struct gpio_chip *gc)
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{
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if (gc->add_pin_ranges)
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return gc->add_pin_ranges(gc);
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return 0;
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}
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bool gpiochip_line_is_valid(const struct gpio_chip *gpiochip,
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unsigned int offset)
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{
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@ -1397,6 +1405,10 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
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}
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}
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ret = gpiochip_add_pin_ranges(chip);
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if (ret)
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goto err_remove_of_chip;
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acpi_gpiochip_add(chip);
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machine_gpiochip_add(chip);
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@ -289,6 +289,9 @@ struct gpio_irq_chip {
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* state (such as pullup/pulldown configuration).
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* @init_valid_mask: optional routine to initialize @valid_mask, to be used if
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* not all GPIOs are valid.
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* @add_pin_ranges: optional routine to initialize pin ranges, to be used when
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* requires special mapping of the pins that provides GPIO functionality.
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* It is called after adding GPIO chip and before adding IRQ chip.
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* @base: identifies the first GPIO number handled by this chip;
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* or, if negative during registration, requests dynamic ID allocation.
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* DEPRECATION: providing anything non-negative and nailing the base
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@ -379,6 +382,8 @@ struct gpio_chip {
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unsigned long *valid_mask,
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unsigned int ngpios);
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int (*add_pin_ranges)(struct gpio_chip *chip);
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int base;
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u16 ngpio;
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const char *const *names;
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