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gpiolib: Document new gpio_chip.init_valid_mask field
A new field init_valid_mask was added to struct gpio_chip, but it was
not documented.
Fixes: f8ec92a9f6
("gpiolib: Add init_valid_mask exported function")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20190701142650.25122-1-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -194,6 +194,8 @@ struct gpio_irq_chip {
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* @dbg_show: optional routine to show contents in debugfs; default code
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* will be used when this is omitted, but custom code can show extra
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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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* @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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