kernel/Documentation/driver-api/serial/serial-rs485.rst, branch linux-rolling-stable

Documentation: Make formatting consistent for rs485 docs

2022-11-03T02:43:05Z

Tweak styling of names that come directly from the code. Suggested-by: Bagas Sanjaya Reviewed-by: Bagas Sanjaya Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221019093343.9546-6-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

Documentation: rs485: Fix struct referencing

2022-11-03T02:43:05Z

Use "struct serial_rs485" to get the references properly recognized. Reviewed-by: Andy Shevchenko Reviewed-by: Bagas Sanjaya Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221019093343.9546-5-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

Documentation: rs485: Mention uart_get_rs485_mode()

2022-11-03T02:43:05Z

Add to rs485 documentation that serial core prepares the struct serial_rs485 when uart_get_rs485_mode() is called. Remove the wrong claim that the driver must fill it by itself. Reviewed-by: Andy Shevchenko Reviewed-by: Bagas Sanjaya Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221019093343.9546-4-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

Documentation: rs485: Link reference properly

2022-11-03T02:43:05Z

Link DT bindings reference properly. Reviewed-by: Andy Shevchenko Reviewed-by: Bagas Sanjaya Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221019093343.9546-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: Convert serial_rs485 to kernel doc

2022-11-03T02:43:05Z

Convert struct serial_rs485 comments to kernel doc format and include it into documentation. Suggested-by: Andy Shevchenko Reviewed-by: Andy Shevchenko Reviewed-by: Bagas Sanjaya Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221019093343.9546-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: Support for RS-485 multipoint addresses

2022-06-27T12:44:20Z

Add support for RS-485 multipoint addressing using 9th bit [*]. The addressing mode is configured through ->rs485_config(). ADDRB in termios indicates 9th bit addressing mode is enabled. In this mode, 9th bit is used to indicate an address (byte) within the communication line. ADDRB can only be enabled/disabled through ->rs485_config() that is also responsible for setting the destination and receiver (filter) addresses. Add traps to detect unwanted changes to struct serial_rs485 layout using static_assert(). [*] Technically, RS485 is just an electronic spec and does not itself specify the 9th bit addressing mode but 9th bit seems at least "semi-standard" way to do addressing with RS485. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220624204210.11112-6-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

serial: Sanitize rs485_struct

2022-06-10T11:49:57Z

Sanitize serial_rs485 struct before calling into rs485_setup. The drivers provide supported_rs485 to help sanitization of the fields. If neither of SER_RS485_RTS_ON_SEND or SER_RS485_RTS_AFTER_SEND supported, don't pretend they can be set to sane settings but clear them both instead. If only one of them is supported it may look tempting to use the one driver supports to set the other, however, the userspace does not have that information readily available so it wouldn't be helpful. While adjusting the documentation, remove also the claim that TIOCGRS485 would call driver specific code. In reality, it does nothing else than copies the stored serial_rs485 structure from uart_port to userspace. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220606100433.13793-23-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman

docs: serial: move it to the driver-api

2019-07-15T14:03:03Z

The contents of this directory is mostly driver-api stuff. Signed-off-by: Mauro Carvalho Chehab