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| author | Hugo Villeneuve <hvilleneuve@dimonoff.com> | 2024-10-07 18:27:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-11 08:14:54 +0200 |
| commit | 068d35a7be65fa3bca4bba21c269bfe0b39158a6 (patch) | |
| tree | 4a8294918b1098539d600e6ae226ecbc30d68ab2 /drivers/tty | |
| parent | serial: 8250: Fix typos in comments across various files (diff) | |
| download | linux-068d35a7be65fa3bca4bba21c269bfe0b39158a6.tar.xz linux-068d35a7be65fa3bca4bba21c269bfe0b39158a6.zip | |
serial: sc16is7xx: announce support for SER_RS485_RTS_ON_SEND
When specifying flag SER_RS485_RTS_ON_SEND in RS485 configuration,
we get the following warning after commit 4afeced55baa ("serial: core:
fix sanitizing check for RTS settings"):
invalid RTS setting, using RTS_AFTER_SEND instead
This results in SER_RS485_RTS_AFTER_SEND being set and the
driver always write to the register field SC16IS7XX_EFCR_RTS_INVERT_BIT,
which breaks some hardware using these chips.
The hardware supports both RTS_ON_SEND and RTS_AFTER_SEND modes, so fix
this by announcing support for RTS_ON_SEND.
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Suggested-by: Konstantin Pugin <ria.freelander@gmail.com>
Link: https://lore.kernel.org/lkml/20240422133219.2710061-2-ria.freelander@gmail.com
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Tested-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20241007162716.3122912-1-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sc16is7xx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index ad88a33a504f..9d0c971e49f5 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1473,7 +1473,7 @@ static int sc16is7xx_setup_mctrl_ports(struct sc16is7xx_port *s, } static const struct serial_rs485 sc16is7xx_rs485_supported = { - .flags = SER_RS485_ENABLED | SER_RS485_RTS_AFTER_SEND, + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, .delay_rts_before_send = 1, .delay_rts_after_send = 1, /* Not supported but keep returning -EINVAL */ }; |