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-rw-r--r--include/mmc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/mmc.h b/include/mmc.h
index dd83f14b6c..9fe6a87e88 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -59,6 +59,7 @@
#define MMC_MODE_8BIT BIT(30)
#define MMC_MODE_4BIT BIT(29)
+#define MMC_MODE_1BIT BIT(28)
#define MMC_MODE_SPI BIT(27)