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Diffstat (limited to 'include/uapi/linux/i2c.h')
-rw-r--r--include/uapi/linux/i2c.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h
index 92326ebde350..a2db2a56c8b0 100644
--- a/include/uapi/linux/i2c.h
+++ b/include/uapi/linux/i2c.h
@@ -21,7 +21,8 @@
*
* @flags:
* Supported by all adapters:
- * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001!
+ * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001! If
+ * not set, the transaction is interpreted as write.
*
* Optional:
* %I2C_M_DMA_SAFE: the buffer of this message is DMA safe. Makes only sense