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Filename Latest commit message Latest commit date
Mark Featherston 54fd6b2eb1 gpio: ts4900: Do not set DAT and OE together
[ Upstream commit 03fe003547975680fdb9ff5ab0e41cb68276c4f2 ]

This works around an issue with the hardware where both OE and
DAT are exposed in the same register. If both are updated
simultaneously, the harware makes no guarantees that OE or DAT
will actually change in any given order and may result in a
glitch of a few ns on a GPIO pin when changing direction and value
in a single write.

Setting direction to input now only affects OE bit. Setting
direction to output updates DAT first, then OE.

Fixes: 9c6686322d ("gpio: add Technologic I2C-FPGA gpio support")
Signed-off-by: Mark Featherston <mark@embeddedTS.com>
Signed-off-by: Kris Bahnsen <kris@embeddedTS.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-03-16 13:21:46 +01:00
arch ARM: dts: aspeed: Fix AST2600 quad spi group 2022-03-16 13:21:45 +01:00
block
certs
crypto
Documentation x86/speculation: Update link to AMD speculation whitepaper 2022-03-11 11:22:37 +01:00
drivers gpio: ts4900: Do not set DAT and OE together 2022-03-16 13:21:46 +01:00
fs
include net/mlx5: Fix size field in bufferx_reg struct 2022-03-16 13:21:46 +01:00
init
ipc
kernel x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting 2022-03-11 11:22:37 +01:00
lib
LICENSES
mm
net ax25: Fix NULL pointer dereference in ax25_kill_by_device 2022-03-16 13:21:45 +01:00
samples
scripts
security
sound
tools selftests: pmtu.sh: Kill tcpdump processes launched by subshell. 2022-03-16 13:21:46 +01:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
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Makefile Linux 5.4.184 2022-03-11 11:22:39 +01:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.