[U-Boot] [PATCH v2 18/26] mmc: Add a execute_tuning() callback to the mmc operations.

[Jean-Jacques Hiblot]

From: Kishon Vijay Abraham I <kishon at ti.com>

Tuning is a mandatory step in the initialization of SDR104 and HS200 modes.
This callback execute the tuning process.

Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
---
 drivers/mmc/mmc-uclass.c | 14 ++++++++++++++
 drivers/mmc/mmc.c        |  5 +++++
 include/mmc.h            | 11 +++++++++++
 3 files changed, 30 insertions(+)

diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 9c6a8ba..60cc0ac 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -92,6 +92,20 @@ int mmc_getcd(struct mmc *mmc)
 	return dm_mmc_get_cd(mmc->dev);
 }
 
+int dm_mmc_execute_tuning(struct udevice *dev, uint opcode)
+{
+	struct dm_mmc_ops *ops = mmc_get_ops(dev);
+
+	if (!ops->execute_tuning)
+		return -ENOSYS;
+	return ops->execute_tuning(dev, opcode);
+}
+
+int mmc_execute_tuning(struct mmc *mmc, uint opcode)
+{
+	return dm_mmc_execute_tuning(mmc->dev, opcode);
+}
+
 struct mmc *mmc_get_mmc_dev(struct udevice *dev)
 {
 	struct mmc_uclass_priv *upriv;
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 1f9730e..3e2e549 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1199,6 +1199,11 @@ static inline int bus_width(uint cap)
 }
 
 #if !CONFIG_IS_ENABLED(DM_MMC)
+static int mmc_execute_tuning(struct mmc *mmc, uint opcode)
+{
+	return -ENOTSUPP;
+}
+
 static void mmc_send_init_stream(struct mmc *mmc)
 {
 }
diff --git a/include/mmc.h b/include/mmc.h
index 8d6e0f8..56fa869 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -383,6 +383,15 @@ struct dm_mmc_ops {
 	 * @return 0 if write-enabled, 1 if write-protected, -ve on error
 	 */
 	int (*get_wp)(struct udevice *dev);
+
+	/**
+	 * execute_tuning() - Start the tuning process
+	 *
+	 * @dev:	Device to start the tuning
+	 * @opcode:	Command opcode to send
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*execute_tuning)(struct udevice *dev, uint opcode);
 };
 
 #define mmc_get_ops(dev)        ((struct dm_mmc_ops *)(dev)->driver->ops)
@@ -393,12 +402,14 @@ int dm_mmc_set_ios(struct udevice *dev);
 void dm_mmc_send_init_stream(struct udevice *dev);
 int dm_mmc_get_cd(struct udevice *dev);
 int dm_mmc_get_wp(struct udevice *dev);
+int dm_mmc_execute_tuning(struct udevice *dev, uint opcode);
 
 /* Transition functions for compatibility */
 int mmc_set_ios(struct mmc *mmc);
 void mmc_send_init_stream(struct mmc *mmc);
 int mmc_getcd(struct mmc *mmc);
 int mmc_getwp(struct mmc *mmc);
+int mmc_execute_tuning(struct mmc *mmc, uint opcode);
 
 #else
 struct mmc_ops {
-- 
1.9.1