mmc: Add a new callback function to perform the 74 clocks cycle sequence
Add a new callback function *send_init_stream* which start a sequence of
at least 74 clock cycles.
The mmc core uses *mmc_send_init_stream* in order to invoke the callback
function. This will be used during power cycle where the specification
requires such a sequence after power up.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/include/mmc.h b/include/mmc.h
index 52cacfd..eead666 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -494,6 +494,14 @@
int (*set_ios)(struct udevice *dev);
/**
+ * send_init_stream() - send the initialization stream: 74 clock cycles
+ * This is used after power up before sending the first command
+ *
+ * @dev: Device to update
+ */
+ void (*send_init_stream)(struct udevice *dev);
+
+ /**
* get_cd() - See whether a card is present
*
* @dev: Device to check
@@ -572,6 +580,7 @@
/* 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);