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| author | Ingo van Lil <inguin@gmx.de> | 2019-12-03 15:21:47 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-12-10 11:57:08 +0100 |
| commit | 9d39d86cd4af2b17b970d63307daad71f563d207 (patch) | |
| tree | a129c52192da0c63a71c7a140a174c45da719e8f /net | |
| parent | ARM: dts: at91: sama5d2: set the sdmmc gclk frequency (diff) | |
| download | linux-9d39d86cd4af2b17b970d63307daad71f563d207.tar.xz linux-9d39d86cd4af2b17b970d63307daad71f563d207.zip | |
ARM: dts: at91: Reenable UART TX pull-ups
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>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions