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Commit 5fdbe136 authored by Matthew Howell's avatar Matthew Howell Committed by Greg Kroah-Hartman
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serial: exar: Fix GPIO configuration for Sealevel cards based on XR17V35X



Sealevel XR17V35X based devices are inoperable on kernel versions
4.11 and above due to a change in the GPIO preconfiguration introduced in
commit
7dea8165. This patch fixes this by preconfiguring the GPIO on Sealevel
cards to the value (0x00) used prior to commit 7dea8165

With GPIOs preconfigured as per commit 7dea8165 all ports on
Sealevel XR17V35X based devices become stuck in high impedance
mode, regardless of dip-switch or software configuration. This
causes the device to become effectively unusable. This patch (in
various forms) has been distributed to our customers and no issues
related to it have been reported.

Fixes: 7dea8165 ("serial: exar: Preconfigure xr17v35x MPIOs as output")
Signed-off-by: default avatarMatthew Howell <matthew.howell@sealevel.com>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2007221605270.13247@tstest-VirtualBox


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 033724d6
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