linux-kernel - [PATCH v2 0/3] Add syscon-reboot and syscon-poweroff support for gs101/Pixel 6

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Message-ID: <20240628223506.1237523-2-peter.griffin@linaro.org>
Date: Fri, 28 Jun 2024 23:35:03 +0100
From: Peter Griffin <peter.griffin@...aro.org>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	alim.akhtar@...sung.com,
	s.nawrocki@...sung.com,
	cw00.choi@...sung.com,
	mturquette@...libre.com,
	sboyd@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	tudor.ambarus@...aro.org,
	andre.draszik@...aro.org,
	kernel-team@...roid.com,
	willmcvicker@...gle.com,
	devicetree@...r.kernel.org,
	linux-clk@...r.kernel.org,
	Peter Griffin <peter.griffin@...aro.org>
Subject: [PATCH v2 0/3]  Add syscon-reboot and syscon-poweroff support for gs101/Pixel 6

Hi Krzysztof,

This series adds support for syscon-reboot and syscon-poweroff to gs101/Oriole.
It has been tested with reboot and poweroff commands respectively.

Note the syscon-reboot/poweroff has *runtime* dependencies on the exynos-pmu
and clk-gs101 patches in this series, as well as [1] which was just queued by
Lee. Those runtime dependencies are described in more detail here [2].
As you are the maintainer for exynos-pmu and samsung clock drivers I've
included those patches in this series.

For the moment I have left out syscon-reboot-mode dt node as whilst it uses the
same SYSIP_DAT0 register as exynosautov9, and setting this the reboot mode is
correctly reported in the Pixel bootloader. The bootloader is also checking a
scratch register in max77779 chip that isn't currently enabled upstream, and
thus the bootloader doesn't actually enter fastboot.

Kind regards,

Peter

[1] https://lore.kernel.org/linux-arm-kernel/20240621115544.1655458-1-peter.griffin@linaro.org/
[2] https://lore.kernel.org/lkml/ZnymlHiCCIDt2dCJ@google.com/T/#m8b3a5e10ad44ae83a9afed4e4f5cd409493d951e

Changes in v2:
 - Move PMUALIVE_MASK check into tensor_is_atomic() (William)
 - Collect up tags
 - rebase onto next-20240628

Peter Griffin (3):
  arm64: dts: exynos: gs101: add syscon-poweroff and syscon-reboot nodes
  soc: samsung: exynos-pmu: add support for PMU_ALIVE non atomic
    registers
  clk: samsung: gs101: mark gout_hsi2_ufs_embd_i_clk_unipro as critical

 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 15 +++++++++++++
 drivers/clk/samsung/clk-gs101.c              |  2 +-
 drivers/soc/samsung/exynos-pmu.c             | 22 +++++++++++++++++---
 include/linux/soc/samsung/exynos-regs-pmu.h  |  4 ++++
 4 files changed, 39 insertions(+), 4 deletions(-)

-- 
2.45.2.803.g4e1b14247a-goog