[U-Boot] [PATCH 3/5] mmc: matsushita-common: Wait for command completion

[Marek Vasut]

Make sure to wait for the command to complete altogether, including
the trailing 8 clock cycles. This prevents the driver for accidentally
writing the CMD register too fast before the previous command fully
completed.

Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Jaehoon Chung <jh80.chung at samsung.com>
Cc: Masahiro Yamada <yamada.masahiro at socionext.com>
---
 drivers/mmc/matsushita-common.c | 2 ++
 drivers/mmc/matsushita-common.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/mmc/matsushita-common.c b/drivers/mmc/matsushita-common.c
index e552a09ea1..33224bb51b 100644
--- a/drivers/mmc/matsushita-common.c
+++ b/drivers/mmc/matsushita-common.c
@@ -498,6 +498,8 @@ int matsu_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 			return ret;
 	}
 
+	matsu_sd_wait_for_irq(dev, MATSU_SD_INFO2, MATSU_SD_INFO2_SCLKDIVEN);
+
 	return ret;
 }
 
diff --git a/drivers/mmc/matsushita-common.h b/drivers/mmc/matsushita-common.h
index 3be91c310e..34631cb43e 100644
--- a/drivers/mmc/matsushita-common.h
+++ b/drivers/mmc/matsushita-common.h
@@ -38,6 +38,7 @@
 #define MATSU_SD_INFO2			0x03c	/* IRQ status 2 */
 #define   MATSU_SD_INFO2_ERR_ILA	BIT(15)	/* illegal access err */
 #define   MATSU_SD_INFO2_CBSY		BIT(14)	/* command busy */
+#define   MATSU_SD_INFO2_SCLKDIVEN	BIT(13)	/* command setting reg ena */
 #define   MATSU_SD_INFO2_BWE		BIT(9)	/* write buffer ready */
 #define   MATSU_SD_INFO2_BRE		BIT(8)	/* read buffer ready */
 #define   MATSU_SD_INFO2_DAT0		BIT(7)	/* SDDAT0 */
-- 
2.16.2