4.18-stable review patch. If anyone has any objections, please let me know.
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From: Andrey Smirnov andrew.smirnov@gmail.com
[ Upstream commit 6c450bdf13ebe110821a74960936cec936edae49 ]
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 --- drivers/mfd/rave-sp.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/mfd/rave-sp.c +++ b/drivers/mfd/rave-sp.c @@ -776,6 +776,13 @@ static int rave_sp_probe(struct serdev_d 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) {