mmc: matsushita-common: Wait for command completion
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@gmail.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/mmc/matsushita-common.c b/drivers/mmc/matsushita-common.c
index e552a09..33224bb 100644
--- a/drivers/mmc/matsushita-common.c
+++ b/drivers/mmc/matsushita-common.c
@@ -498,6 +498,8 @@
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 3be91c3..34631cb 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 */