linux-kernel - [PATCH v2 0/3] syscon: Alter syscon and reboot drivers

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Date:   Fri, 8 May 2020 02:38:43 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Sebastian Reichel <sre@...nel.org>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Maxim Kaurkin <Maxim.Kaurkin@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>,
        Ekaterina Skachko <Ekaterina.Skachko@...kalelectronics.ru>,
        Vadim Vlasov <V.Vlasov@...kalelectronics.ru>,
        Alexey Kolotnikov <Alexey.Kolotnikov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Arnd Bergmann <arnd@...db.de>,
        Allison Randal <allison@...utok.net>,
        Richard Fontana <rfontana@...hat.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>, <linux-mips@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 0/3] syscon: Alter syscon and reboot drivers

This is a small patchset about tuning the syscon infrastructure a bit.
As it's going to be general in the framework of the Baikal-T1 SoC support
integration into the kernel, we suggest to replace the legacy text-based
syscon-reboot-mode dts-bindings file with yaml-based one. Then seeing a
syscon reboot block is normally expected to be a part of a system
controller and based on the discussion
https://lore.kernel.org/linux-pm/20200306130402.1F4F0803079F@mail.baikalelectronics.ru/
we decided to alter the syscon reboot driver so one would also try to fetch
the syscon registers map from a parental DT node. regmap property is left
supported although it's marked as deprecated from now.

This patchset is rebased and tested on the mainline Linux kernel 5.7-rc4:
0e698dfa2822 ("Linux 5.7-rc4")
tag: v5.7-rc4

Changelog v2:
- Add Sebastian' Acked-by tag to patch 1.
- Use a shorter summary describing the bindings modification patches.
- Our corporate email server doesn't change Message-Id anymore, so the patchset
  is resubmitted being in the cover-letter-threaded format.
- Discard patch with syscon "-endian" property support. As Rob said It shall be
  in the common dt-schema.
- Replace patches of adding a regmap property support to the syscon-reboot-mode
  with patches making syscon-reboot a sub-node of a system controller node.
- Mark regmap property as deprecated from now.

Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Cc: Maxim Kaurkin <Maxim.Kaurkin@...kalelectronics.ru>
Cc: Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>
Cc: Ramil Zaripov <Ramil.Zaripov@...kalelectronics.ru>
Cc: Ekaterina Skachko <Ekaterina.Skachko@...kalelectronics.ru>
Cc: Vadim Vlasov <V.Vlasov@...kalelectronics.ru>
Cc: Alexey Kolotnikov <Alexey.Kolotnikov@...kalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Paul Burton <paulburton@...nel.org>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Allison Randal <allison@...utok.net>
Cc: Richard Fontana <rfontana@...hat.com>
Cc: Kate Stewart <kstewart@...uxfoundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: linux-mips@...r.kernel.org
Cc: devicetree@...r.kernel.org
Cc: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org

Serge Semin (3):
  dt-bindings: power: reset: Convert syscon-reboot-mode to DT schema
  dt-bindings: power: reset: Unrequire regmap property in syscon-reboot
    node
  power: reset: syscon-reboot: Add parental syscon support

 .../power/reset/syscon-reboot-mode.txt        | 35 ------------
 .../power/reset/syscon-reboot-mode.yaml       | 55 +++++++++++++++++++
 .../bindings/power/reset/syscon-reboot.yaml   | 15 +++--
 drivers/power/reset/syscon-reboot.c           |  7 ++-
 4 files changed, 70 insertions(+), 42 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt
 create mode 100644 Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml

-- 
2.25.1