linux-kernel - driver: reset: spacemit-p1: add driver for poweroff/reboot

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Message-ID: <20250927220824.1267318-1-aurelien@aurel32.net>
Date: Sun, 28 Sep 2025 00:07:39 +0200
From: Aurelien Jarno <aurelien@...el32.net>
To: linux-kernel@...r.kernel.org,
	Lee Jones <lee@...nel.org>,
	Sebastian Reichel <sre@...nel.org>,
	Yixun Lan <dlan@...too.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>
Cc: Aurelien Jarno <aurelien@...el32.net>,
	linux-pm@...r.kernel.org (open list:SYSTEM RESET/SHUTDOWN DRIVERS),
	linux-riscv@...ts.infradead.org (open list:RISC-V SPACEMIT SoC Support),
	spacemit@...ts.linux.dev (open list:RISC-V SPACEMIT SoC Support)
Subject: driver: reset: spacemit-p1: add driver for poweroff/reboot

This adds poweroff/reboot support for the SpacemiT P1 PMIC chip, which is
commonly paired with the SpacemiT K1 SoC.

Note: For reliable operation, this driver depends on a separate patch series
that adds atomic transfer support to the SpacemiT I2C controller driver:
https://lore.kernel.org/spacemit/48B175EBF0F1A347+aNXwqlO1mD-7BGtE@kernel.org/T/#t
The two fixes mentioned there are also required:
https://lore.kernel.org/spacemit/aNbDkn9AC4FFx-Zc@aurel32.net/

Aurelien Jarno (2):
  driver: reset: spacemit-p1: add driver for poweroff/reboot
  mfd: simple-mfd-i2c: add a reboot cell for the SpacemiT P1 chip

 drivers/mfd/simple-mfd-i2c.c             |  1 +
 drivers/power/reset/Kconfig              |  9 +++
 drivers/power/reset/Makefile             |  1 +
 drivers/power/reset/spacemit-p1-reboot.c | 88 ++++++++++++++++++++++++
 4 files changed, 99 insertions(+)
 create mode 100644 drivers/power/reset/spacemit-p1-reboot.c

-- 
2.47.2