[PATCH v3 02/11] mmc: Add a deferred_probe() API

[Faiz Abbas]

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 at ti.com>
---
 drivers/mmc/mmc-uclass.c | 15 +++++++++++++++
 drivers/mmc/mmc.c        |  4 +++-
 include/mmc.h            | 10 ++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 0b90a97650..c75892a72c 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -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;
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index b50fcbf6cf..a347308976 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -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
diff --git a/include/mmc.h b/include/mmc.h
index d0fa7689c9..f001776285 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -407,6 +407,14 @@ 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
 	 *
@@ -490,6 +498,7 @@ 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);
@@ -499,6 +508,7 @@ 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 {
-- 
2.19.2