mirror of
https://github.com/Fishwaldo/Star64_linux.git
synced 2025-07-20 05:43:09 +00:00
serial: Allow uart_get_rs485_mode() to return errno
We're about to amend uart_get_rs485_mode() to support a GPIO pin for rs485 bus termination. Retrieving the GPIO descriptor may fail, so allow uart_get_rs485_mode() to return an errno and change all callers to check for failure. The GPIO descriptor is going to be stored in struct uart_port. Pass that struct to uart_get_rs485_mode() in lieu of a struct device and struct serial_rs485, both of which are directly accessible from struct uart_port. A few drivers call uart_get_rs485_mode() before setting the struct device pointer in struct uart_port. Shuffle those calls around where necessary. [Heiko Stuebner did the ar933x_uart.c portion, hence his Signed-off-by.] Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/271e814af4b0db3bffbbb74abf2b46b75add4516.1589285873.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
e0a851fe6b
commit
c150c0f362
9 changed files with 33 additions and 14 deletions
|
@ -472,5 +472,5 @@ extern int uart_handle_break(struct uart_port *port);
|
|||
(cflag) & CRTSCTS || \
|
||||
!((cflag) & CLOCAL))
|
||||
|
||||
void uart_get_rs485_mode(struct device *dev, struct serial_rs485 *rs485conf);
|
||||
int uart_get_rs485_mode(struct uart_port *port);
|
||||
#endif /* LINUX_SERIAL_CORE_H */
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue