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Commit a1b13b4e authored by Chris Ball's avatar Chris Ball
Browse files

mmc: sdhci: Add platform suspend/resume hooks. 



Some platforms require saving/restoring registers across suspend/resume;
this hook allows them to do that inside their driver.

Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent a39e5746

drivers/mmc/host/sdhci.c

+6 −0
Original line number Diff line number Diff line
@@ -2379,6 +2379,9 @@ int sdhci_suspend_host(struct sdhci_host *host) 
	int ret;

	bool has_tuning_timer;



	if (host->ops->platform_suspend)

		host->ops->platform_suspend(host);



	sdhci_disable_card_detection(host);



	/* Disable tuning since we are suspending */
@@ -2429,6 +2432,9 @@ int sdhci_resume_host(struct sdhci_host *host) 
	ret = mmc_resume_host(host->mmc);

	sdhci_enable_card_detection(host);



	if (host->ops->platform_resume)

		host->ops->platform_resume(host);



	/* Set the re-tuning expiration flag */

	if ((host->version >= SDHCI_SPEC_300) && host->tuning_count &&

	    (host->tuning_mode == SDHCI_TUNING_MODE_1))

drivers/mmc/host/sdhci.h

+2 −0
Original line number Diff line number Diff line
@@ -275,6 +275,8 @@ struct sdhci_ops { 
	void	(*platform_reset_exit)(struct sdhci_host *host, u8 mask);

	int	(*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);

	void	(*hw_reset)(struct sdhci_host *host);

	void	(*platform_suspend)(struct sdhci_host *host);

	void	(*platform_resume)(struct sdhci_host *host);

};



#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS