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Filename Latest commit message Latest commit date
Charles Keepax dba56969cc spi: cadence: Correct handling of native chipselect 
[ Upstream commit 61acd19f9c56fa0809285346bd0bd4a926ab0da0 ]

To fix a regression on the Cadence SPI driver, this patch reverts
commit 6046f5407f ("spi: cadence: Fix default polarity of native
chipselect").

This patch was not the correct fix for the issue. The SPI framework
calls the set_cs line with the logic level it desires on the chip select
line, as such the old is_high handling was correct. However, this was
broken by the fact that before commit 3e5ec1db8bfe ("spi: Fix SPI_CS_HIGH
setting when using native and GPIO CS") all controllers that offered
the use of a GPIO chip select had SPI_CS_HIGH applied, even for hardware
chip selects. This caused the value passed into the driver to be inverted.
Which unfortunately makes it look like a logical enable the chip select
value.

Since the core was corrected to not unconditionally apply SPI_CS_HIGH,
the Cadence driver, whilst using the hardware chip select, will deselect
the chip select every time we attempt to communicate with the device,
which results in failed communications.

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/20191126164140.6240-1-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: cadence: 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 Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
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 clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.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 kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
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.