This series improves termination handling for RS485. Effectively, .rs485_supported is made a per port and the termination flag is enabled when DT configures termination. The downside of this is that embedded struct consumes a little bit of more memory, especially as struct serial_rs485 has the padding field. There is other problem on this area besides the one addressed by this series which is new since the introduction of .rs485_supported. Lino's patch series addresses the ability to tweak the termination through ->rs485_config() for any driver. For kernel uses, struct kserial_rs485 version of serial_rs485 could be added and both .rs485 and .rs485_supported converted to it leaving struct_rs485 only for UAPI use. This series, howver, doesn't attempt it. It seems relatively easy to build it on top of these changes though. Ilpo Järvinen (2): serial: Embed rs485_supported serial: RS485 termination is supported if DT provides one drivers/tty/serial/8250/8250_bcm2835aux.c | 2 +- drivers/tty/serial/8250/8250_dwlib.c | 4 ++-- drivers/tty/serial/8250/8250_exar.c | 2 +- drivers/tty/serial/8250/8250_fintek.c | 4 ++-- drivers/tty/serial/8250/8250_lpc18xx.c | 2 +- drivers/tty/serial/8250/8250_of.c | 2 +- drivers/tty/serial/8250/8250_pci.c | 2 +- drivers/tty/serial/amba-pl011.c | 2 +- drivers/tty/serial/ar933x_uart.c | 4 ++-- drivers/tty/serial/atmel_serial.c | 2 +- drivers/tty/serial/fsl_lpuart.c | 2 +- drivers/tty/serial/imx.c | 4 ++-- drivers/tty/serial/max310x.c | 2 +- drivers/tty/serial/mcf.c | 4 ++-- drivers/tty/serial/omap-serial.c | 2 +- drivers/tty/serial/sc16is7xx.c | 2 +- drivers/tty/serial/serial_core.c | 10 ++++++---- drivers/tty/serial/stm32-usart.c | 2 +- include/linux/serial_core.h | 2 +- 19 files changed, 29 insertions(+), 27 deletions(-) -- 2.30.2
