From 6c450bdf13ebe110821a74960936cec936edae49 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 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 --- 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 a90ec4986b22..aa75d5841ca0 100644 --- a/drivers/mfd/rave-sp.c +++ b/drivers/mfd/rave-sp.c @@ -766,6 +766,13 @@ 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) { -- 2.30.2