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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: Chris Ball <cjb@laptop.org>
This commit is contained in:
Chris Ball 2012-02-06 00:43:59 -05:00
parent a39e5746e4
commit a1b13b4e18
2 changed files with 8 additions and 0 deletions
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6
drivers/mmc/host/sdhci.c
View File

@ -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))

2
drivers/mmc/host/sdhci.h
View File

@ -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