From 3ca5bae4d2d8f35ad847625b9f693c73db467f4e Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Fri, 6 Jul 2018 19:41:05 -0700 Subject: [PATCH] mfd: rave-sp: Initialize flow control and parity of the port [ 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 Signed-off-by: Lee Jones Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/mfd/rave-sp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/mfd/rave-sp.c b/drivers/mfd/rave-sp.c index 36dcd98977d6d..4f545fdc6ebcc 100644 --- a/drivers/mfd/rave-sp.c +++ b/drivers/mfd/rave-sp.c @@ -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) { -- 2.51.0