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Filename Latest commit message Latest commit date
Charles Keepax 68b0cbb1ad spi: dw: Correct handling of native chipselect 
[ Upstream commit ada9e3fcc175db4538f5b5e05abf5dedf626e550 ]

This patch reverts commit 6e0a32d6f3 ("spi: dw: Fix default polarity
of native chipselect").

The SPI framework always called the set_cs callback with the logic
level it desired on the chip select line, which is what the drivers
original handling supported. commit f3186dd876 ("spi: Optionally
use GPIO descriptors for CS GPIOs") changed these symantics, but only
in the case of drivers that also support GPIO chip selects, to true
meaning apply slave select rather than logic high. This left things in
an odd state where a driver that only supports hardware chip selects,
the core would handle polarity but if the driver supported GPIOs as
well the driver should handle polarity.  At this point the reverted
change was applied to change the logic in the driver to match new
system.

This was then broken by commit 3e5ec1db8bfe ("spi: Fix SPI_CS_HIGH
setting when using native and GPIO CS") which reverted the core back
to consistently calling set_cs with a logic level.

This fix reverts the driver code back to its original state to match
the current core code. This is probably a better fix as a) the set_cs
callback is always called with consistent symantics and b) the
inversion for SPI_CS_HIGH can be handled in the core and doesn't need
to be coded in each driver supporting it.

Fixes: 3e5ec1db8bfe ("spi: Fix SPI_CS_HIGH setting when using native and GPIO CS")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191127153936.29719-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-31 16:45:59 +01:00
arch MIPS: futex: Restore \n after sync instructions 2019-12-31 16:45:49 +01:00
block block: fix "check bi_size overflow before merge" 2019-12-21 11:04:32 +01:00
certs
crypto crypto: aegis128/simd - build 32-bit ARM for v8 architecture explicitly 2019-12-31 16:43:57 +01:00
Documentation USB: documentation: flags on usb-storage versus UAS 2019-12-17 19:55:32 +01:00
drivers spi: dw: Correct handling of native chipselect 2019-12-31 16:45:59 +01:00
fs btrfs: don't prematurely free work in scrub_missing_raid56_worker() 2019-12-31 16:45:50 +01:00
include net: avoid potential false sharing in neighbor related code 2019-12-31 16:45:03 +01:00
init
ipc
kernel bpf: Provide better register bounds after jmp32 instructions 2019-12-31 16:45:48 +01:00
lib ubsan, x86: Annotate and allow __ubsan_handle_shift_out_of_bounds() in uaccess regions 2019-12-31 16:44:25 +01:00
LICENSES
mm mm/shmem.c: cast the type of unmap_start to u64 2019-12-17 19:56:51 +01:00
net can: j1939: j1939_sk_bind(): take priv after lock is held 2019-12-31 16:45:56 +01:00
samples samples: pktgen: fix proc_cmd command result check logic 2019-12-31 16:43:45 +01:00
scripts arm64 fix for -rc8 / final 2019-11-15 09:14:23 -08:00
security efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN 2019-10-31 09:40:21 +01:00
sound ASoC: soc-pcm: check symmetry before hw_params 2019-12-31 16:45:42 +01:00
tools selftests: net: tls: remove recv_rcvbuf test 2019-12-31 16:45:58 +01:00
usr kbuild: update compile-test header list for v5.4-rc2 2019-10-05 15:29:49 +09:00
virt KVM: arm/arm64: vgic: Don't rely on the wrong pending table 2019-12-13 08:43:00 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild
Kconfig
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-11-22 14:28:14 -08:00
Makefile Linux 5.4.6 2019-12-21 11:05:23 +01:00
README

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.