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Viewing File: /usr/src/kernels/5.14.0-570.32.1.el9_6.x86_64/include/linux/platform_data/mmc-sdhci-s3c.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PLATFORM_DATA_SDHCI_S3C_H
#define __PLATFORM_DATA_SDHCI_S3C_H

struct platform_device;

enum cd_types {
	S3C_SDHCI_CD_INTERNAL,	/* use mmc internal CD line */
	S3C_SDHCI_CD_EXTERNAL,	/* use external callback */
	S3C_SDHCI_CD_GPIO,	/* use external gpio pin for CD line */
	S3C_SDHCI_CD_NONE,	/* no CD line, use polling to detect card */
	S3C_SDHCI_CD_PERMANENT,	/* no CD line, card permanently wired to host */
};

/**
 * struct s3c_sdhci_platdata() - Platform device data for Samsung SDHCI
 * @max_width: The maximum number of data bits supported.
 * @host_caps: Standard MMC host capabilities bit field.
 * @host_caps2: The second standard MMC host capabilities bit field.
 * @cd_type: Type of Card Detection method (see cd_types enum above)
 * @ext_cd_init: Initialize external card detect subsystem. Called on
 *		 sdhci-s3c driver probe when cd_type == S3C_SDHCI_CD_EXTERNAL.
 *		 notify_func argument is a callback to the sdhci-s3c driver
 *		 that triggers the card detection event. Callback arguments:
 *		 dev is pointer to platform device of the host controller,
 *		 state is new state of the card (0 - removed, 1 - inserted).
 * @ext_cd_cleanup: Cleanup external card detect subsystem. Called on
 *		 sdhci-s3c driver remove when cd_type == S3C_SDHCI_CD_EXTERNAL.
 *		 notify_func argument is the same callback as for ext_cd_init.
 * @ext_cd_gpio: gpio pin used for external CD line, valid only if
 *		 cd_type == S3C_SDHCI_CD_GPIO
 * @ext_cd_gpio_invert: invert values for external CD gpio line
 * @cfg_gpio: Configure the GPIO for a specific card bit-width
 *
 * Initialisation data specific to either the machine or the platform
 * for the device driver to use or call-back when configuring gpio or
 * card speed information.
*/
struct s3c_sdhci_platdata {
	unsigned int	max_width;
	unsigned int	host_caps;
	unsigned int	host_caps2;
	unsigned int	pm_caps;
	enum cd_types	cd_type;

	int		ext_cd_gpio;
	bool		ext_cd_gpio_invert;
	int	(*ext_cd_init)(void (*notify_func)(struct platform_device *,
						   int state));
	int	(*ext_cd_cleanup)(void (*notify_func)(struct platform_device *,
						      int state));

	void	(*cfg_gpio)(struct platform_device *dev, int width);
};


#endif /* __PLATFORM_DATA_SDHCI_S3C_H */
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