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mmc: add a reinit() API

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For DM_MMC, the controller re-initialization is needed to
clear old configuration for mmc rescan.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Yangbo Lu 2020-09-01 16:57:59 +08:00 committed by Peng Fan
parent 726561a941
commit 390f9bddb9
3 changed files with 31 additions and 2 deletions
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15
drivers/mmc/mmc-uclass.c
View File

@ -171,6 +171,21 @@ int mmc_deferred_probe(struct mmc *mmc)
return dm_mmc_deferred_probe(mmc->dev);
}
int dm_mmc_reinit(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->reinit)
return ops->reinit(dev);
return 0;
}
int mmc_reinit(struct mmc *mmc)
{
return dm_mmc_reinit(mmc->dev);
}
int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
{
int val;

8
drivers/mmc/mmc.c
View File

@ -2816,13 +2816,17 @@ int mmc_get_op_cond(struct mmc *mmc)
return err;
#if CONFIG_IS_ENABLED(DM_MMC)
/* The device has already been probed ready for use */
/*
* Re-initialization is needed to clear old configuration for
* mmc rescan.
*/
err = mmc_reinit(mmc);
#else
/* made sure it's not NULL earlier */
err = mmc->cfg->ops->init(mmc);
#endif
if (err)
return err;
#endif
mmc->ddr_mode = 0;
retry:

10
include/mmc.h
View File

@ -421,6 +421,14 @@ struct dm_mmc_ops {
* @return 0 if Ok, -ve if error
*/
int (*deferred_probe)(struct udevice *dev);
/**
* reinit() - Re-initialization to clear old configuration for
* mmc rescan.
*
* @dev: Device to reinit
* @return 0 if Ok, -ve if error
*/
int (*reinit)(struct udevice *dev);
/**
* send_cmd() - Send a command to the MMC device
*
@ -518,6 +526,7 @@ int dm_mmc_execute_tuning(struct udevice *dev, uint opcode);
int dm_mmc_wait_dat0(struct udevice *dev, int state, int timeout_us);
int dm_mmc_host_power_cycle(struct udevice *dev);
int dm_mmc_deferred_probe(struct udevice *dev);
int dm_mmc_reinit(struct udevice *dev);
int dm_mmc_get_b_max(struct udevice *dev, void *dst, lbaint_t blkcnt);
/* Transition functions for compatibility */
@ -529,6 +538,7 @@ int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us);
int mmc_set_enhanced_strobe(struct mmc *mmc);
int mmc_host_power_cycle(struct mmc *mmc);
int mmc_deferred_probe(struct mmc *mmc);
int mmc_reinit(struct mmc *mmc);
int mmc_get_b_max(struct mmc *mmc, void *dst, lbaint_t blkcnt);
#else