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Werner Fischer 91828d9316 watchdog: it87_wdt: Keep WDTCTRL bit 3 unmodified for IT8784/IT8786 
[ Upstream commit d12971849d ]

WDTCTRL bit 3 sets the mode choice for the clock input of IT8784/IT8786.
Some motherboards require this bit to be set to 1 (= PCICLK mode),
otherwise the watchdog functionality gets broken. The BIOS of those
motherboards sets WDTCTRL bit 3 already to 1.

Instead of setting all bits of WDTCTRL to 0 by writing 0x00 to it, keep
bit 3 of it unchanged for IT8784/IT8786 chips. In this way, bit 3 keeps
the status as set by the BIOS of the motherboard.

Watchdog tests have been successful with this patch with the following
systems:
  IT8784: Thomas-Krenn LES plus v2 (YANLING YL-KBRL2 V2)
  IT8786: Thomas-Krenn LES plus v3 (YANLING YL-CLU L2)
  IT8786: Thomas-Krenn LES network 6L v2 (YANLING YL-CLU6L)

Link: https://lore.kernel.org/all/140b264d-341f-465b-8715-dacfe84b3f71@roeck-us.net/

Signed-off-by: Werner Fischer <devlists@wefi.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231213094525.11849-4-devlists@wefi.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-02-23 08:54:49 +01:00
arch arm64: dts: qcom: msm8998: Fix 'out-ports' is a required property 2024-02-23 08:54:44 +01:00
block block: prevent an integer overflow in bvec_try_merge_hw_page 2024-02-23 08:54:44 +01:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: api - Disallow identical driver names 2024-02-23 08:54:23 +01:00
Documentation ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument 2024-02-23 08:54:46 +01:00
drivers watchdog: it87_wdt: Keep WDTCTRL bit 3 unmodified for IT8784/IT8786 2024-02-23 08:54:49 +01:00
fs f2fs: fix to tag gcing flag on page during block migration 2024-02-23 08:54:48 +01:00
include PCI: add INTEL_HDA_ARL to pci_ids.h 2024-02-23 08:54:47 +01:00
init rootfs: Fix support for rootfstype= when root= is given 2024-01-25 14:52:48 -08:00
io_uring io_uring/rw: ensure io->bytes_done is always initialized 2024-01-25 14:52:48 -08:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:28:45 +01:00
kernel bpf: Set uattr->batch.count as zero before batched update or deletion 2024-02-23 08:54:42 +01:00
lib debugobjects: Stop accessing objects after releasing hash bucket lock 2024-02-23 08:54:37 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/sparsemem: fix race in accessing memory_section->usage 2024-02-23 08:54:34 +01:00
net bridge: cfm: fix enum typo in br_cc_ccm_tx_parse 2024-02-23 08:54:45 +01:00
samples samples/hw_breakpoint: fix building without module unloading 2023-09-23 11:10:01 +02:00
scripts scripts/get_abi: fix source path leak 2024-02-23 08:54:25 +01:00
security lsm: new security_file_ioctl_compat() hook 2024-02-23 08:54:25 +01:00
sound ALSA: hda: intel-dspcfg: add filters for ARL-S and ARL 2024-02-23 08:54:47 +01:00
tools libbpf: Fix NULL pointer dereference in bpf_object__collect_prog_relos 2024-02-23 08:54:45 +01:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Grab a reference to KVM for VM and vCPU stats file descriptors 2023-08-03 10:22:40 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-26 14:23:27 +02:00
Makefile Linux 5.15.148 2024-01-25 14:52:56 -08:00
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.