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.lu@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 90690c8d1e36fc2ebafb9527fc7b7f85c85d7646..b90e1ee30d17b8dc1b9a7e2179f773247970ed71 100644 (file)
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -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;

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index d79cdef62ed21d1ce1993074cd625ba98f2d805e..0727505304616b39041e2000d8d675bad10bdcc8 100644 (file)
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -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:

diff --git a/include/mmc.h b/include/mmc.h
index 75bcaaf6b3550d28ac8b979fdd1b6ac67d08c801..93494d939a1cef70af0f5038b40f03271f08cb5a 100644 (file)
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -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