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mfd: rave-sp: Initialize flow control and parity of the port

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[ Upstream commit 6c450bdf13 ]

Relying on serial port defaults for flow control and parity can result
in complete breakdown of communication with RAVE SP on some platforms
where defaults are not what we need them to be. One such case is
VF610-base ZII SPU3 board (not supported upstream). To avoid this
problem in the future, add code to explicitly configure both.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrey Smirnov
2018-09-19 22:41:36 +02:00
committed by Greg Kroah-Hartman
parent 0342426f2b
commit 3ca5bae4d2
1 changed files with 7 additions and 0 deletions
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drivers/mfd/rave-sp.c
+7
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@@ -776,6 +776,13 @@ static int rave_sp_probe(struct serdev_device *serdev)
return ret;
serdev_device_set_baudrate(serdev, baud);
serdev_device_set_flow_control(serdev, false);
ret = serdev_device_set_parity(serdev, SERDEV_PARITY_NONE);
if (ret) {
dev_err(dev, "Failed to set parity\n");
return ret;
}
ret = rave_sp_get_status(sp);
if (ret) {