docs: gpio: driver.rst: fix a bad tag
With ReST, [foo]_ means a reference to foo, causing this warning: Documentation/driver-api/gpio/driver.rst:419: WARNING: Unknown target name: "devm". Fix it by using a literal for the name. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -418,7 +418,7 @@ symbol:
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If there is a need to exclude certain GPIO lines from the IRQ domain handled by
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these helpers, we can set .irq.need_valid_mask of the gpiochip before
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[devm_]gpiochip_add_data() is called. This allocates an .irq.valid_mask with as
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``[devm_]gpiochip_add_data()`` is called. This allocates an .irq.valid_mask with as
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many bits set as there are GPIO lines in the chip, each bit representing line
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0..n-1. Drivers can exclude GPIO lines by clearing bits from this mask. The mask
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must be filled in before gpiochip_irqchip_add() or gpiochip_irqchip_add_nested()
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