linux-kernel - [PATCH v2 0/3] reset: Requesting pre-deasserted, auto-reasserting reset controls via devres

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Message-Id: <20240925-reset-get-deasserted-v2-0-b3601bbd0458@pengutronix.de>
Date: Wed, 25 Sep 2024 18:40:08 +0200
From: Philipp Zabel <p.zabel@...gutronix.de>
To: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>, 
 Masami Hiramatsu <mhiramat@...nel.org>, 
 Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, 
 Uwe Kleine-König <u.kleine-koenig@...libre.com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 kernel@...gutronix.de, Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH v2 0/3] reset: Requesting pre-deasserted, auto-reasserting
 reset controls via devres

There is a recurring pattern of drivers requesting a reset control and
deasserting the reset during probe, followed by registering a reset
assertion via devm_add_action_or_reset().

We can simplify this by providing devm_reset_control_get_*_deasserted()
helpers that return an already deasserted reset control, similarly to
devm_clk_get_enabled().

This doesn't remove a lot of boilerplate at each instance, but there are
quite a few of them now.

regards
Philipp

Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
---
Changes in v2:
- Clear RESET_CONTROL_FLAGS_BIT_OPTIONAL out of flags.
- Check flags in __of_reset_control_get().
- Fix devm_reset_control_array_get() documentation.
- Clear RESET_CONTROL_FLAGS_BIT_DEASSERTED out of flags.
- Link to v1: https://lore.kernel.org/r/20240621-reset-get-deasserted-v1-0-94ee76fb7b7d@pengutronix.de

---
Philipp Zabel (3):
      reset: replace boolean parameters with flags parameter
      reset: Add devres helpers to request pre-deasserted reset controls
      reset: uniphier-glue: Use devm_reset_control_bulk_get_shared_deasserted()

 drivers/reset/core.c                | 119 +++++++++++-----
 drivers/reset/reset-uniphier-glue.c |  24 +---
 include/linux/reset.h               | 274 ++++++++++++++++++++++++++++--------
 3 files changed, 303 insertions(+), 114 deletions(-)
---
base-commit: 487b1b32e317b85c2948eb4013f3e089a0433d49
change-id: 20240621-reset-get-deasserted-5185a8e4a706

Best regards,
-- 
Philipp Zabel <p.zabel@...gutronix.de>