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mmc: Add support for wait_dat0 callback

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There is no wait_dat0 mmc ops, causing operations waiting for data
line state change (e.g mmc_switch_voltage) to fallback to a 250ms
active delay. mmc_ops still used when DM_MMC is not enabled, which
is often the case for SPL. The result can be unexpectly long SPL
boot time.

This change adds support for wait_dat0() mmc operation.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Loic Poulain 2022-05-26 16:37:21 +02:00 committed by Jaehoon Chung
parent d72267049b
commit d6ad5a0af9
2 changed files with 4 additions and 0 deletions
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3
drivers/mmc/mmc.c
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@ -34,6 +34,9 @@ static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage);
static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us)
{
if (mmc->cfg->ops->wait_dat0)
return mmc->cfg->ops->wait_dat0(mmc, state, timeout_us);
return -ENOSYS;
}

1
include/mmc.h
View File

@ -561,6 +561,7 @@ struct mmc_ops {
int (*getwp)(struct mmc *mmc);
int (*host_power_cycle)(struct mmc *mmc);
int (*get_b_max)(struct mmc *mmc, void *dst, lbaint_t blkcnt);
int (*wait_dat0)(struct mmc *mmc, int state, int timeout_us);
};
static inline int mmc_hs400_prepare_ddr(struct mmc *mmc)