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mmc: sdhci: Add HS400 Enhanced Strobe support

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Delegate setting the Enhanced Strobe configuration to individual drivers
if they set a function for it. Return -ENOTSUPP if they do not, like
what the MMC uclass does.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Alper Nebi Yasak
2022-03-15 20:46:26 +03:00
committed by Jaehoon Chung
parent 0f3466f52f
commit 2a1d7c635f
2 changed files with 30 additions and 0 deletions
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12
include/sdhci.h
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@@ -272,6 +272,18 @@ struct sdhci_ops {
int (*platform_execute_tuning)(struct mmc *host, u8 opcode);
int (*set_delay)(struct sdhci_host *host);
int (*deferred_probe)(struct sdhci_host *host);
/**
* set_enhanced_strobe() - Set HS400 Enhanced Strobe config
*
* This is called after setting the card speed and mode to
* HS400 ES, and should set any host-specific configuration
* necessary for it.
*
* @host: SDHCI host structure
* Return: 0 if successful, -ve on error
*/
int (*set_enhanced_strobe)(struct sdhci_host *host);
};
#define ADMA_MAX_LEN 65532