Commits
Ingo van Lil committed bd13285419b
ARM: dts: at91: Reenable UART TX pull-ups commit 9d39d86cd4af2b17b970d63307daad71f563d207 upstream. Pull-ups for SAM9 UART/USART TX lines were disabled in a previous commit. However, several chips in the SAM9 family require pull-ups to prevent the TX lines from falling (and causing an endless break condition) when the transceiver is disabled. From the SAM9G20 datasheet, 32.5.1: "To prevent the TXD line from falling when the USART is disabled, the use of an internal pull up is mandatory.". This commit reenables the pull-ups for all chips having that sentence in their datasheets. Fixes: 5e04822f7db5 ("ARM: dts: at91: fixes uart pinctrl, set pullup on rx, clear pullup on tx") Signed-off-by: Ingo van Lil <inguin@gmx.de> Cc: Peter Rosin <peda@axentia.se> Link: https://lore.kernel.org/r/20191203142147.875227-1-inguin@gmx.de Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>