diff options
Diffstat (limited to 'include/uapi/linux/i2c.h')
| -rw-r--r-- | include/uapi/linux/i2c.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h index 92326ebde350..2a226657d9f8 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 @@ -35,7 +36,7 @@ * * Only if I2C_FUNC_NOSTART is set: * %I2C_M_NOSTART: skip repeated start sequence - + * * Only if I2C_FUNC_PROTOCOL_MANGLING is set: * %I2C_M_NO_RD_ACK: in a read message, master ACK/NACK bit is skipped * %I2C_M_IGNORE_NAK: treat NACK from client as ACK |