214fc309d1
Add a debounce parameter to the mmc_gpio_request_cd() function that enables GPIO debouncing when set to a non-zero value. This can be used by MMC host drivers to enable debouncing on the card detect signal. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Chris Ball <cjb@laptop.org>
26 lines
728 B
C
26 lines
728 B
C
/*
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* Generic GPIO card-detect helper header
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*
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* Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef MMC_SLOT_GPIO_H
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#define MMC_SLOT_GPIO_H
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struct mmc_host;
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int mmc_gpio_get_ro(struct mmc_host *host);
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int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio);
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void mmc_gpio_free_ro(struct mmc_host *host);
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int mmc_gpio_get_cd(struct mmc_host *host);
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int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio,
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unsigned int debounce);
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void mmc_gpio_free_cd(struct mmc_host *host);
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#endif
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