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mmc: Add a deferred_probe() API 

Add a deferred_probe() API for platforms that want to do some
configurations just before starting to enumerate the device.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
This commit is contained in:
Faiz Abbas 2020-02-26 13:44:30 +05:30 committed by Peng Fan
parent 0d3c858488
commit 32860bdbc1
3 changed files with 28 additions and 1 deletions
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15
drivers/mmc/mmc-uclass.c
View File

@ -138,6 +138,21 @@ int mmc_host_power_cycle(struct mmc *mmc)
return dm_mmc_host_power_cycle(mmc->dev);
}
int dm_mmc_deferred_probe(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->deferred_probe)
return ops->deferred_probe(dev);
return 0;
}
int mmc_deferred_probe(struct mmc *mmc)
{
return dm_mmc_deferred_probe(mmc->dev);
}
int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
{
int val;

4
drivers/mmc/mmc.c
View File

@ -2845,7 +2845,9 @@ int mmc_start_init(struct mmc *mmc)
*/
mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(SD_LEGACY) |
MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT;
#if CONFIG_IS_ENABLED(DM_MMC)
mmc_deferred_probe(mmc);
#endif
#if !defined(CONFIG_MMC_BROKEN_CD)
no_card = mmc_getcd(mmc) == 0;
#else

10
include/mmc.h
View File

@ -409,6 +409,14 @@ struct mmc;
#if CONFIG_IS_ENABLED(DM_MMC)
struct dm_mmc_ops {
/**
* deferred_probe() - Some configurations that need to be deferred
* to just before enumerating the device
*
* @dev: Device to init
* @return 0 if Ok, -ve if error
*/
int (*deferred_probe)(struct udevice *dev);
/**
* send_cmd() - Send a command to the MMC device
*
@ -492,6 +500,7 @@ int dm_mmc_get_wp(struct udevice *dev);
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);
/* Transition functions for compatibility */
int mmc_set_ios(struct mmc *mmc);
@ -501,6 +510,7 @@ int mmc_execute_tuning(struct mmc *mmc, uint opcode);
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);
#else
struct mmc_ops {