> Subject: [v2, 01/11] mmc: add a reinit() API
>
> For DM_MMC, the controller re-initialization is needed to clear old
> configuration for mmc rescan.
>
> Signed-off-by: Yangbo Lu <yangbo...@nxp.com>
> ---
> Changes for v2:
> - None.
> ---
> drivers/mmc/mmc-uclass.c | 15 +++++++++++++++
> drivers/mmc/mmc.c | 8 ++++++--
> include/mmc.h | 10 ++++++++++
> 3 files changed, 31 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c index
> c5b7872..b9f0880 100644
> --- a/drivers/mmc/mmc-uclass.c
> +++ b/drivers/mmc/mmc-uclass.c
> @@ -170,6 +170,21 @@ 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;
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index
> 50f47d4..a53f93a 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -2813,13 +2813,17 @@ 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.
You mean cmd "mmc rescan" ?
> + */
> + err = mmc_reinit(mmc);
Probe could not provide what you need? You need a different settings?
Regards,
Peng.
> #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:
> diff --git a/include/mmc.h b/include/mmc.h index 8256219..161b8bc 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -422,6 +422,14 @@ struct dm_mmc_ops {
> */
> 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
> *
> * @dev: Device to receive the command
> @@ -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
> --
> 2.7.4
