linux-kernel - [PATCH v2 0/5] rockchip: Add power controller support for RK3528

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Message-ID: <20250723085654.2273324-1-jonas@kwiboo.se>
Date: Wed, 23 Jul 2025 08:56:42 +0000
From: Jonas Karlman <jonas@...boo.se>
To: Heiko Stuebner <heiko@...ech.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: Yao Zi <ziyao@...root.org>,
	Chukun Pan <amadeus@....edu.cn>,
	devicetree@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Jonas Karlman <jonas@...boo.se>
Subject: [PATCH v2 0/5] rockchip: Add power controller support for RK3528

The Rockchip RK3528 support multiple power domains, one PD_GPU that can
fully be powered down, and other that can be idle requested.

Vendor kernel flag all power domains on RK3528 as always-on, this takes
a different route and instead tries to describe all devices power-domain
in the device tree, even for controllers with unsupported runtime status.

The PD_RKVDEC is used by RKVDEC and DDRPHY CRU, and is kept disabled to
prevent a full system reset when trying to read current rate of the
SCMI_CLK_DDR clock.

pm_genpd_summary on a Radxa E20C after this:

  domain                          status          children        performance
      /device                         runtime status                  managed by
  ------------------------------------------------------------------------------
  vpu                             on                              0
      ffaf0000.gpio                   unsupported                 0           SW
      ffb10000.gpio                   unsupported                 0           SW
      ffbe0000.ethernet               active                      0           SW
      ffae0000.adc                    unsupported                 0           SW
      ffbf0000.mmc                    suspended                   0           SW
  vo                              on                              0
      ffb00000.gpio                   unsupported                 0           SW
      ffc30000.mmc                    suspended                   0           SW
  venc                            on                              0
      ffb20000.gpio                   unsupported                 0           SW
      ffa58000.i2c                    unsupported                 0           SW
  gpu                             off-0                           0
      ff700000.gpu                    suspended                   0           SW

Changes in v2:
- Drop already applied patches
- Add snps-dw-apb-uart dt-bindings patch
- Update commit messages

This series depend on the patch "arm64: dts: rockchip: convert rk3528
power-domains to dt-binding constants" [1] for a clean apply.

[1] https://lore.kernel.org/r/20250620201715.1572609-1-heiko@sntech.de

Jonas Karlman (5):
  dt-bindings: gpio: rockchip: Allow use of a power-domain
  dt-bindings: i2c: i2c-rk3x: Allow use of a power-domain
  dt-bindings: iio: adc: rockchip-saradc: Allow use of a power-domain
  dt-bindings: serial: snps-dw-apb-uart: Allow use of a power-domain
  arm64: dts: rockchip: Enable more power domains for RK3528

 .../bindings/gpio/rockchip,gpio-bank.yaml     |  3 ++
 .../devicetree/bindings/i2c/i2c-rk3x.yaml     |  3 ++
 .../bindings/iio/adc/rockchip-saradc.yaml     |  3 ++
 .../bindings/serial/snps-dw-apb-uart.yaml     |  3 ++
 arch/arm64/boot/dts/rockchip/rk3528.dtsi      | 30 +++++++++++++++++--
 5 files changed, 39 insertions(+), 3 deletions(-)

-- 
2.50.1