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From: Andrew Davis <afd@ti.com>
To: Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
Santosh
Shilimkar <ssantosh@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
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CC: <linux-arm-kernel@lists.infradead.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-pm@vger.kernel.org>,
Andrew Davis
<afd@ti.com>
Subject: [PATCH 00/12] Add TI-SCI reboot driver
Date: Wed, 31 Jan 2024 16:19:45 -0600
Message-ID: <20240131221957.213717-1-afd@ti.com>
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| Series |
Add TI-SCI reboot driver
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Message
Andrew Davis
Jan. 31, 2024, 10:19 p.m. UTC
Hello all, While PCSI normally handles reboot for K3, this is an available fallback in case PCSI reboot fails. This driver is registered with low priority as we want PSCI to remain the main way these devices are rebooted. The important part is the binding/DT changes. Currently in U-Boot (which use the Linux device trees) we may not have PSCI available yet (pre TF-A) and so we need this node to correctly reboot. Adding this node in U-Boot is one of the last remaining deltas between the two project DT files. Thanks, Andrew Andrew Davis (12): dt-bindings: power: reset: Document ti,sci-reboot compatible dt-bindings: arm: keystone: ti-sci: Add reboot-controller child node power: reset: Add TI-SCI reboot driver arm64: dts: ti: k3-am64: Add reboot-controller node arm64: dts: ti: k3-am62: Add reboot-controller node arm64: dts: ti: k3-am62a: Add reboot-controller node arm64: dts: ti: k3-am62p: Add reboot-controller node arm64: dts: ti: k3-am65: Add reboot-controller node arm64: dts: ti: k3-j7200: Add reboot-controller node arm64: dts: ti: k3-j721e: Add reboot-controller node arm64: dts: ti: k3-j721s2: Add reboot-controller node arm64: dts: ti: k3-j784s4: Add reboot-controller node .../bindings/arm/keystone/ti,sci.yaml | 8 +++ .../bindings/power/reset/ti,sci-reboot.yaml | 33 ++++++++++ MAINTAINERS | 2 + arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 5 ++ arch/arm64/boot/dts/ti/k3-am62a-main.dtsi | 4 ++ arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 5 ++ arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 5 ++ arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi | 4 ++ .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi | 4 ++ .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi | 4 ++ .../boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 4 ++ .../boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi | 5 ++ drivers/power/reset/Kconfig | 7 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/ti-sci-reboot.c | 63 +++++++++++++++++++ 15 files changed, 154 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml create mode 100644 drivers/power/reset/ti-sci-reboot.c
Comments
On 16:19-20240131, Andrew Davis wrote: > Hello all, > > While PCSI normally handles reboot for K3, this is an available > fallback in case PCSI reboot fails. This driver is registered > with low priority as we want PSCI to remain the main way these > devices are rebooted. > > The important part is the binding/DT changes. Currently in > U-Boot (which use the Linux device trees) we may not have > PSCI available yet (pre TF-A) and so we need this node > to correctly reboot. Adding this node in U-Boot is one of > the last remaining deltas between the two project DT files. > > Thanks, > Andrew > > Andrew Davis (12): > dt-bindings: power: reset: Document ti,sci-reboot compatible > dt-bindings: arm: keystone: ti-sci: Add reboot-controller child node > power: reset: Add TI-SCI reboot driver > arm64: dts: ti: k3-am64: Add reboot-controller node > arm64: dts: ti: k3-am62: Add reboot-controller node > arm64: dts: ti: k3-am62a: Add reboot-controller node > arm64: dts: ti: k3-am62p: Add reboot-controller node > arm64: dts: ti: k3-am65: Add reboot-controller node > arm64: dts: ti: k3-j7200: Add reboot-controller node > arm64: dts: ti: k3-j721e: Add reboot-controller node > arm64: dts: ti: k3-j721s2: Add reboot-controller node > arm64: dts: ti: k3-j784s4: Add reboot-controller node Maybe after the driver has been accepted, a defconfig patch(module) might be useful? > > .../bindings/arm/keystone/ti,sci.yaml | 8 +++ > .../bindings/power/reset/ti,sci-reboot.yaml | 33 ++++++++++ > MAINTAINERS | 2 + > arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 5 ++ > arch/arm64/boot/dts/ti/k3-am62a-main.dtsi | 4 ++ > arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 5 ++ > arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 5 ++ > arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi | 4 ++ > .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi | 4 ++ > .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi | 4 ++ > .../boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 4 ++ > .../boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi | 5 ++ > drivers/power/reset/Kconfig | 7 +++ > drivers/power/reset/Makefile | 1 + > drivers/power/reset/ti-sci-reboot.c | 63 +++++++++++++++++++ > 15 files changed, 154 insertions(+) > create mode 100644 Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml > create mode 100644 drivers/power/reset/ti-sci-reboot.c