From: Hugo Villeneuve hvilleneuve@dimonoff.com
Hello, this patch series brings additional patches to fix some FIFO issues when backporting to linux-5.15.y for the sc16is7xx driver.
Commit ("serial: sc16is7xx: add missing support for rs485 devicetree properties") is required when using RS-485.
Commit ("serial: sc16is7xx: refactor FIFO access functions to increase commonality") is a prerequisite for commit ("serial: sc16is7xx: fix TX fifo corruption"). Altough it is not strictly necessary, it makes backporting easier.
I have tested the changes on a custom board with two SC16IS752 DUART over a SPI interface using a Variscite IMX8MN NANO SOM. The four UARTs are configured in RS-485 mode.
Thank you.
Hugo Villeneuve (4): serial: sc16is7xx: add missing support for rs485 devicetree properties serial: sc16is7xx: refactor FIFO access functions to increase commonality serial: sc16is7xx: fix TX fifo corruption serial: sc16is7xx: fix invalid FIFO access with special register set
drivers/tty/serial/sc16is7xx.c | 38 ++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 16 deletions(-)