Messages in this thread Patch in this message | | | From | H Hartley Sweeten <> | Subject | basic_mmio_gpio: Add hook for simple debounce register | Date | Wed, 16 Nov 2011 12:02:15 -0700 |
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Some platforms using the basic memory-mapped GPIO library have simple input debounce support that is enabled/disabled, per-input, by setting/clearing bits in a control register. Add a hook in the bgpio_chip structure to hold the void __iomem * for this register.
This register, and the gc.set_debounce callback should set by the platform after calling bgpio_init() and before calling gpiochip_add().
... err = bgpio_chip(bgc, ...); if (err) return err;
bgc->reg_db = platform_debounce_reg; bgc->gc.set_debounce = platform_set_debounce_func;
return gpiochip_add(&bgc->gc); }
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Jamie Iles <jamie@jamieiles.com> Cc: Anton Vorontsov <cbouatmailru@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> CC: Russell King <rmk+kernel@arm.linux.org.uk>
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diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h index feb91219..9bec937 100644 --- a/include/linux/basic_mmio_gpio.h +++ b/include/linux/basic_mmio_gpio.h @@ -35,6 +35,7 @@ struct bgpio_chip { void __iomem *reg_set; void __iomem *reg_clr; void __iomem *reg_dir; + void __iomem *reg_db; /* Number of bits (GPIOs): <register width> * 8. */ int bits;
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