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Ivan Galkin 90206ede63 net: phy: RTL8211FVD: Restore disabling of PHY-mode EEE 
[ Upstream commit 4f0638b124 ]

When support for RTL8211F(D)(I)-VD-CG was introduced in commit
bb726b753f ("net: phy: realtek: add support for RTL8211F(D)(I)-VD-CG")
the implementation assumed that this PHY model doesn't have the
control register PHYCR2 (Page 0xa43 Address 0x19). This
assumption was based on the differences in CLKOUT configurations
between RTL8211FVD and the remaining RTL8211F PHYs. In the latter
commit 2c67301584
("net: phy: realtek: Avoid PHYCR2 access if PHYCR2 not present")
this assumption was expanded to the PHY-mode EEE.

I performed tests on RTL8211FI-VD-CG and confirmed that disabling
PHY-mode EEE works correctly and is uniform with other PHYs
supported by the driver. To validate the correctness,
I contacted Realtek support. Realtek confirmed that PHY-mode EEE on
RTL8211F(D)(I)-VD-CG is configured via Page 0xa43 Address 0x19 bit 5.

Moreover, Realtek informed me that the most recent datasheet
for RTL8211F(D)(I)-VD-CG v1.1 is incomplete and the naming of
control registers is partly inconsistent. The errata I
received from Realtek corrects the naming as follows:

| Register                | Datasheet v1.1 | Errata |
|-------------------------|----------------|--------|
| Page 0xa44 Address 0x11 | PHYCR2         | PHYCR3 |
| Page 0xa43 Address 0x19 | N/A            | PHYCR2 |

This information confirms that the supposedly missing control register,
PHYCR2, exists in the RTL8211F(D)(I)-VD-CG under the same address and
the same name. It controls widely the same configs as other PHYs from
the RTL8211F series (e.g. PHY-mode EEE). Clock out configuration is an
exception.

Given all this information, restore disabling of the PHY-mode EEE.

Fixes: 2c67301584 ("net: phy: realtek: Avoid PHYCR2 access if PHYCR2 not present")
Signed-off-by: Ivan Galkin <ivan.galkin@axis.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20251202-phy_eee-v1-1-fe0bf6ab3df0@axis.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-02 12:56:44 +01:00
arch x86/microcode: Mark early_parse_cmdline() as __init 2026-01-02 12:56:39 +01:00
block block: Use RCU in blk_mq_[un]quiesce_tagset() instead of set->tag_list_lock 2025-12-18 14:03:40 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: ahash - Zero positive err value in ahash_update_finish 2025-12-18 14:03:12 +01:00
Documentation docs: hwmon: fix link to g762 devicetree binding 2025-12-18 14:03:38 +01:00
drivers net: phy: RTL8211FVD: Restore disabling of PHY-mode EEE 2026-01-02 12:56:44 +01:00
fs gfs2: Fix use of bio_chain 2026-01-02 12:56:43 +01:00
include shmem: fix recovery on rename failures 2026-01-02 12:56:37 +01:00
init printk changes for 6.18 2025-10-04 11:13:11 -07:00
io_uring io_uring/kbuf: use READ_ONCE() for userspace-mapped memory 2025-12-18 14:03:36 +01:00
ipc namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
kernel livepatch: Match old_sympos 0 and 1 in klp_find_func() 2026-01-02 12:56:39 +01:00
lib lib/vsprintf: Check pointer before dereferencing in time_and_date() 2025-12-18 14:02:58 +01:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm shmem: fix recovery on rename failures 2026-01-02 12:56:37 +01:00
net net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change 2026-01-02 12:56:43 +01:00
rust rust: Add -fno-isolate-erroneous-paths-dereference to bindgen_skip_c_flags 2025-11-10 08:37:06 +08:00
samples samples: work around glibc redefining some of our defines wrong 2025-11-21 09:29:02 -08:00
scripts kbuild: Use objtree for module signing key path 2026-01-02 12:56:40 +01:00
security landlock: Fix handling of disconnected directories 2025-12-18 14:03:27 +01:00
sound ALSA: wavefront: Fix integer overflow in sample size validation 2025-12-18 14:03:43 +01:00
tools perf stat: Allow no events to open if this is a "--null" run 2025-12-18 14:03:32 +01:00
usr gen_init_cpio: Ignore fsync() returning EINVAL on pipes 2025-10-07 09:53:05 -07:00
virt KVM: guest_memfd: Remove bindings on memslot deletion when gmem is dying 2025-11-04 09:16:53 -08:00
.clang-format memblock: drop for_each_free_mem_pfn_range_in_zone_from() 2025-09-14 08:49:03 +03:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap 8 hotfixes. 4 are cc:stable, 7 are against mm/. 2025-11-26 12:38:05 -08:00
.pylintrc tools: docs: parse-headers.py: move it from sphinx dir 2025-08-29 15:54:42 -06:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: mark ISDN subsystem as orphan 2025-10-27 17:49:45 -07:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS soc: fixes for 6.18, part 4 2025-11-28 09:57:31 -08:00
Makefile Linux 6.18.2 2025-12-18 14:03:43 +01:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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 reStructuredText 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.