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i2c: Clarify behavior of I2C_M_RD flag

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Update the description of I2C_M_RD to clarify that not setting it
signals a write transaction

Signed-off-by: I Viswanath <viswanathiyyappan@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
I Viswanath
2025-07-14 09:15:58 +02:00
committed by Wolfram Sang
parent 6b07ea7134
commit c3ff7f06c7
1 changed files with 2 additions and 1 deletions
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include/uapi/linux/i2c.h
+2 -1
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@@ -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