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Jesse Van Gavere 5af53577c6 net: dsa: microchip: KSZ9896 register regmap alignment to 32 bit boundaries 
Commit 8d7ae22ae9 ("net: dsa: microchip: KSZ9477 register regmap
alignment to 32 bit boundaries") fixed an issue whereby regmap_reg_range
did not allow writes as 32 bit words to KSZ9477 PHY registers, this fix
for KSZ9896 is adapted from there as the same errata is present in
KSZ9896C as "Module 5: Certain PHY registers must be written as pairs
instead of singly" the explanation below is likewise taken from this
commit.

The commit provided code
to apply "Module 6: Certain PHY registers must be written as pairs instead
of singly" errata for KSZ9477 as this chip for certain PHY registers
(0xN120 to 0xN13F, N=1,2,3,4,5) must be accessed as 32 bit words instead
of 16 or 8 bit access.
Otherwise, adjacent registers (no matter if reserved or not) are
overwritten with 0x0.

Without this patch some registers (e.g. 0x113c or 0x1134) required for 32
bit access are out of valid regmap ranges.

As a result, following error is observed and KSZ9896 is not properly
configured:

ksz-switch spi1.0: can't rmw 32bit reg 0x113c: -EIO
ksz-switch spi1.0: can't rmw 32bit reg 0x1134: -EIO
ksz-switch spi1.0 lan1 (uninitialized): failed to connect to PHY: -EIO
ksz-switch spi1.0 lan1 (uninitialized): error -5 setting up PHY for tree 0, switch 0, port 0

The solution is to modify regmap_reg_range to allow accesses with 4 bytes
boundaries.

Fixes: 5c844d57aa ("net: dsa: microchip: fix writes to phy registers >= 0x10")
Signed-off-by: Jesse Van Gavere <jesse.vangavere@scioteq.com>
Link: https://patch.msgid.link/20241211092932.26881-1-jesse.vangavere@scioteq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-12-12 07:10:11 -08:00
arch LoongArch fixes for v6.13-rc2 2024-12-04 10:31:37 -08:00
block block-6.13-20242901 2024-11-30 15:47:29 -08:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto module: Convert symbol namespace to string literal 2024-12-02 11:34:44 -08:00
Documentation Documentation: networking: Add a caveat to nexthop_compat_mode sysctl 2024-12-10 18:26:24 -08:00
drivers net: dsa: microchip: KSZ9896 register regmap alignment to 32 bit boundaries 2024-12-12 07:10:11 -08:00
fs for-6.13-rc1-tag 2024-12-03 11:02:17 -08:00
include netfilter pull request 24-12-11 2024-12-12 13:11:38 +01:00
init - The series "resource: A couple of cleanups" from Andy Shevchenko 2024-11-25 16:09:48 -08:00
io_uring io_uring-6.13-20242901 2024-11-30 15:43:02 -08:00
ipc - The series "resource: A couple of cleanups" from Andy Shevchenko 2024-11-25 16:09:48 -08:00
kernel tracing fixes for v6.13: 2024-12-05 10:17:55 -08:00
lib module: Convert symbol namespace to string literal 2024-12-02 11:34:44 -08:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm module: Convert symbol namespace to string literal 2024-12-02 11:34:44 -08:00
net netfilter pull request 24-12-11 2024-12-12 13:11:38 +01:00
rust block-6.13-20242901 2024-11-30 15:47:29 -08:00
samples module: Convert symbol namespace to string literal 2024-12-02 11:34:44 -08:00
scripts scripts/nsdeps: get 'make nsdeps' working again 2024-12-03 08:22:25 -08:00
security Including fixes from can and netfilter. 2024-12-05 10:25:06 -08:00
sound module: Convert symbol namespace to string literal 2024-12-02 11:34:44 -08:00
tools netfilter pull request 24-12-11 2024-12-12 13:11:38 +01:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt VFIO updates for v6.13 2024-11-27 12:57:03 -08:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: enable Clippy's check-private-items 2024-10-07 21:39:57 +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: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.13 2024-11-30 13:41:50 -08:00
.mailmap media updates for v6.13-rc1 2024-11-20 14:01:15 -08:00
.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 cgroup: Changes for v6.13 2024-11-20 09:54:49 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: Add ethtool.h to NETWORKING [GENERAL] 2024-12-11 19:55:07 -08:00
Makefile Linux 6.13-rc1 2024-12-01 14:28:56 -08:00
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.