linux-kernel - [PATCH v4 0/2] Add reset control for mfd syscon devices

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Message-Id: <20230105005010.124948-1-jk@codeconstruct.com.au>
Date:   Thu,  5 Jan 2023 08:50:08 +0800
From:   Jeremy Kerr <jk@...econstruct.com.au>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     Mark Brown <broonie@...nel.org>
Subject: [PATCH v4 0/2] Add reset control for mfd syscon devices

This RFC series adds a facility for syscon devices to control a reset
line when probed; we have instances of simple register-only syscon
resources that need deassertion of a reset line for the register set to
be accessible.

Rather than requiring a specific driver to implement this, it'd be nice
to use the generic syscon device and the generic resets linkage to do
so.

Any comments/queries/etc are most welcome.

Cheers,


Jeremy

---
v2:
 - use direct syscon registration interface, rather than the (unused)
   syscon platform device code
 - consequently, add regmap infrastructure to attach a reset
   controller, in a similar way to attaching clocks
v3:
 - drop regmap reset control and just do a direct deassert from the syscon
   driver
v4:
 - collapse unnecessary else block in syscon driver reset control

---
Jeremy Kerr (2):
  dt-bindings: mfd/syscon: Add resets property
  mfd: syscon: allow reset control for syscon devices

 .../devicetree/bindings/mfd/syscon.yaml       |  3 +++
 drivers/mfd/syscon.c                          | 27 ++++++++++++++-----
 2 files changed, 24 insertions(+), 6 deletions(-)

-- 
2.38.1