Commit cb849648 authored by Adrian Hunter's avatar Adrian Hunter Committed by Ulf Hansson
Browse files

mmc: sdhci: Add a callback to select drive strength 



Add a callbak to let host drivers select drive
strength.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent cc4f414c

drivers/mmc/host/sdhci.c

+13 −0
Original line number Diff line number Diff line
@@ -2048,6 +2048,18 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) 
	return err;

}



static int sdhci_select_drive_strength(struct mmc_card *card,

				       unsigned int max_dtr, int host_drv,

				       int card_drv, int *drv_type)

{

	struct sdhci_host *host = mmc_priv(card->host);



	if (!host->ops->select_drive_strength)

		return 0;



	return host->ops->select_drive_strength(host, card, max_dtr, host_drv,

						card_drv, drv_type);

}



static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)

{
@@ -2192,6 +2204,7 @@ static const struct mmc_host_ops sdhci_ops = { 
	.start_signal_voltage_switch	= sdhci_start_signal_voltage_switch,

	.prepare_hs400_tuning		= sdhci_prepare_hs400_tuning,

	.execute_tuning			= sdhci_execute_tuning,

	.select_drive_strength		= sdhci_select_drive_strength,

	.card_event			= sdhci_card_event,

	.card_busy	= sdhci_card_busy,

};

drivers/mmc/host/sdhci.h

+4 −0
Original line number Diff line number Diff line
@@ -538,6 +538,10 @@ struct sdhci_ops { 
	void	(*platform_init)(struct sdhci_host *host);

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

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

	int	(*select_drive_strength)(struct sdhci_host *host,

					 struct mmc_card *card,

					 unsigned int max_dtr, int host_drv,

					 int card_drv, int *drv_type);

};



#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS