Commit 845c8770 authored May 06, 2015 by Mika Westerberg Committed by Linus Walleij May 13, 2015

i2c / ACPI: Assign IRQ for devices that have GpioInt automatically



Following what DT already does. If the device does not have ACPI Interrupt
resource but instead it has one or more GpioInt resources listed below it,
we take the first GpioInt resource, convert it to suitable Linux IRQ number
and pass it to the driver instead.

This makes drivers simpler because the don't need to care about GPIOs at
all if only thing they need is interrupt.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

parent dab472eb

drivers/i2c/i2c-core.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -631,8 +631,13 @@ static int i2c_device_probe(struct device *dev)
		if (!client)
		return 0;

		if (!client->irq && dev->of_node) {
		int irq = of_irq_get(dev->of_node, 0);
		if (!client->irq) {
		int irq = -ENOENT;

		if (dev->of_node)
		irq = of_irq_get(dev->of_node, 0);
		else if (ACPI_COMPANION(dev))
		irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0);

		if (irq == -EPROBE_DEFER)
		return irq;

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