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David S. Miller 7c89d9d9f9 Merge branch 'net-ravb-Add-support-for-explicit-internal-clock-delay-c 
onfiguration'

Geert Uytterhoeven says:

====================
net/ravb: Add support for explicit internal clock delay configuration

Some Renesas EtherAVB variants support internal clock delay
configuration, which can add larger delays than the delays that are
typically supported by the PHY (using an "rgmii-*id" PHY mode, and/or
"[rt]xc-skew-ps" properties).

Historically, the EtherAVB driver configured these delays based on the
"rgmii-*id" PHY mode.  This caused issues with PHY drivers that
implement PHY internal delays properly[1].  Hence a backwards-compatible
workaround was added by masking the PHY mode[2].

This patch series implements the next step of the plan outlined in [3],
and adds proper support for explicit configuration of the MAC internal
clock delays using new "[rt]x-internal-delay-ps" properties.  If none of
these properties is present, the driver falls back to the old handling.

This can be considered the MAC counterpart of commit 9150069bf5
("dt-bindings: net: Add tx and rx internal delays"), which applies to
the PHY.  Note that unlike commit 92252eec91 ("net: phy: Add a
helper to return the index for of the internal delay"), no helpers are
provided to parse the DT properties, as so far there is a single user
only, which supports only zero or a single fixed value.  Of course such
helpers can be added later, when the need arises, or when deemed useful
otherwise.

This series consists of 3 parts:
  1. DT binding updates documenting the new properties, for both the
     generic ethernet-controller and the EtherAVB-specific bindings,
  2. Conversion to json-schema of the Renesas EtherAVB DT bindings.
     Technically, the conversion is independent of all of the above.
     I included it in this series, as it shows how all sanity checks on
     "[rt]x-internal-delay-ps" values are implemented as DT binding
     checks,
  3. EtherAVB driver update implementing support for the new properties.

Given Rob has provided his acks for the DT binding updates, all of this
can be merged through net-next.

Changes compared to v3[4]:
  - Add Reviewed-by,
  - Drop the DT updates, as they will be merged through renesas-devel and
    arm-soc, and have a hard dependency on this series.

Changes compared to v2[5]:
  - Update recently added board DTS files,
  - Add Reviewed-by.

Changes compared to v1[6]:
  - Added "[PATCH 1/7] dt-bindings: net: ethernet-controller: Add
    internal delay properties",
  - Replace "renesas,[rt]xc-delay-ps" by "[rt]x-internal-delay-ps",
  - Incorporated EtherAVB DT binding conversion to json-schema,
  - Add Reviewed-by.

Impacted, tested:
  - Salvator-X(S) with R-Car H3 ES1.0 and ES2.0, M3-W, and M3-N.

Not impacted, tested:
  - Ebisu with R-Car E3.

Impacted, not tested:
  - Salvator-X(S) with other SoC variants,
  - ULCB with R-Car H3/M3-W/M3-N variants,
  - V3MSK and Eagle with R-Car V3M,
  - Draak with R-Car V3H,
  - HiHope RZ/G2[MN] with RZ/G2M or RZ/G2N,
  - Beacon EmbeddedWorks RZ/G2M Development Kit.

To ease testing, I have pushed this series and the DT updates to the
topic/ravb-internal-clock-delays-v4 branch of my renesas-drivers
repository at
git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git.

Thanks for applying!

References:
  [1] Commit bcf3440c6d ("net: phy: micrel: add phy-mode support
      for the KSZ9031 PHY")
  [2] Commit 9b23203c32 ("ravb: Mask PHY mode to avoid inserting
      delays twice").
      https://lore.kernel.org/r/20200529122540.31368-1-geert+renesas@glider.be/
  [3] https://lore.kernel.org/r/CAMuHMdU+MR-2tr3-pH55G0GqPG9HwH3XUd=8HZxprFDMGQeWUw@mail.gmail.com/
  [4] https://lore.kernel.org/linux-devicetree/20200819134344.27813-1-geert+renesas@glider.be/
  [5] https://lore.kernel.org/linux-devicetree/20200706143529.18306-1-geert+renesas@glider.be/
  [6] https://lore.kernel.org/linux-devicetree/20200619191554.24942-1-geert+renesas@glider.be/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-01 12:53:31 -07:00
arch net: mscc: ocelot: add definitions for VCAP ES0 keys, actions and target 2020-09-29 18:26:12 -07:00
block - Fix a regression in bdev partition locking (Christoph) 2020-09-11 11:55:28 -07:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
Documentation dt-bindings: net: renesas,etheravb: Convert to json-schema 2020-10-01 12:53:30 -07:00
drivers ravb: Add support for explicit internal clock delay configuration 2020-10-01 12:53:31 -07:00
fs Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-22 16:45:34 -07:00
include net/mlx5: E-switch, Use PF num in metadata reg c0 2020-09-30 21:26:28 -07:00
init Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-22 16:45:34 -07:00
ipc ipc: adjust proc_ipc_sem_dointvec definition to match prototype 2020-09-05 12:14:29 -07:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-09-23 13:11:11 -07:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-22 16:45:34 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-22 16:45:34 -07:00
net drop_monitor: Filter control packets in drop monitor 2020-09-30 18:01:26 -07:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-09-23 13:11:11 -07:00
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security Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-09-22 16:45:34 -07:00
sound sound fixes for 5.9-rc6 2020-09-18 11:38:08 -07:00
tools selftests: net: Add drop monitor test 2020-09-30 18:01:26 -07:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt KVM: fix memory leak in kvm_io_bus_unregister_dev() 2020-09-11 13:15:11 -04:00
.clang-format clang-format: Update with the latest for_each macro list 2020-09-01 12:53:42 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: Add ZSTD-compressed files 2020-07-31 11:50:49 +02:00
.mailmap mailmap: add older email addresses for Kees Cook 2020-09-19 13:13:38 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Add Krzysztof Kozlowski to Samsung S3FWRN5 and remove Robert 2020-09-10 15:22:16 -07:00
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 drop_monitor: Convert to using devlink tracepoint 2020-09-30 18:01:26 -07:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2020-09-23 13:11:11 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 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.