diff options
| -rw-r--r-- | Documentation/driver-api/serial/serial-rs485.rst | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/Documentation/driver-api/serial/serial-rs485.rst b/Documentation/driver-api/serial/serial-rs485.rst index ee34c8e1e56e..e53aa291bcd7 100644 --- a/Documentation/driver-api/serial/serial-rs485.rst +++ b/Documentation/driver-api/serial/serial-rs485.rst @@ -29,7 +29,7 @@ RS485 Serial Communications 3. Data Structures Already Available in the Kernel ================================================== - The Linux kernel provides the serial_rs485 structure to handle RS485 + The Linux kernel provides the struct serial_rs485 to handle RS485 communications. This data structure is used to set and configure RS485 parameters in the platform data and in ioctls. @@ -40,13 +40,14 @@ RS485 Serial Communications Any driver for devices capable of working both as RS232 and RS485 should implement the rs485_config callback and provide rs485_supported in the - uart_port structure. The serial core calls rs485_config to do the device - specific part in response to TIOCSRS485 ioctl (see below). The rs485_config - callback receives a pointer to a sanitizated serial_rs485 structure. The - serial_rs485 userspace provides is sanitized before calling rs485_config - using rs485_supported that indicates what RS485 features the driver supports - for the uart_port. TIOCGRS485 ioctl can be used to read back the - serial_rs485 structure matching to the current configuration. + struct uart_port. The serial core calls rs485_config to do the device + specific part in response to TIOCSRS485 ioctl (see below). The + rs485_config callback receives a pointer to a sanitizated struct + serial_rs485. The struct serial_rs485 userspace provides is sanitized + before calling rs485_config using rs485_supported that indicates what + RS485 features the driver supports for the struct uart_port. TIOCGRS485 + ioctl can be used to read back the struct serial_rs485 matching to the + current configuration. .. kernel-doc:: include/uapi/linux/serial.h :identifiers: serial_rs485 uart_get_rs485_mode @@ -108,8 +109,8 @@ RS485 Serial Communications The Linux kernel provides addressing mode for multipoint RS-485 serial communications line. The addressing mode is enabled with SER_RS485_ADDRB - flag in serial_rs485. Struct serial_rs485 has two additional flags and - fields for enabling receive and destination addresses. + flag in struct serial_rs485. The struct serial_rs485 has two additional + flags and fields for enabling receive and destination addresses. Address mode flags: - SER_RS485_ADDRB: Enabled addressing mode (sets also ADDRB in termios). |