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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series adds wakeup support for the Main UART in the device tree of the TI AM62 family of devices. It defines the specific pins and pinctrl states needed to wakeup the system from the Main UART via I/O daisy-chaining. The wakeup-source property is configured to describe the low power modes the system can wakeup from using the Main UART. Implementation -------------- This series is intended to be implemented along with the following series: 1. "pmdomain: ti_sci: handle wakeup constraint for out-of-band wakeup": Skips setting constraints for wakeup sources that have out-of-band wakeup capability. https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/pmdomain 2. "serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists": Implements out-of-band wakeup from the UARTs for TI K3 SoCs. https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/uart-wakeup 3. "arm64: dts: ti: k3-am62: Support Main UART wakeup": (this series) implements the functionality to wakeup the system from the Main UART. https://github.com/kwillis01/linux/tree/b4/uart-daisy-chain-dts Testing ------- Tested on a AM62P SK EVM board and a AM62L EVM board with all the above mentioned series implemented. Suspend/resume verified with the Main UART wakeup source by entering a keypress on the console. This github branch has all the necessary patches to test the series using v6.19-rc1: https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/all Revisions --------- v1->v2: - Define AM62L system idle states - Enable Main UART wakeup for AM62L SoC - Rebase to v6.19-rc3 v1: https://lore.kernel.org/all/20250904212827.3730314-1-k-willis@ti.com/ --- Kendall Willis (5): arm64: dts: ti: k3-am62l: Define possible system states arm64: dts: ti: k3-am62x-sk-common: Enable Main UART wakeup arm64: dts: ti: k3-am62a7-sk: Enable Main UART wakeup arm64: dts: ti: k3-am62p5-sk: Enable Main UART wakeup arm64: dts: ti: k3-am62l3-evm: Enable Main UART wakeup arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 24 ++++++++++++++++++++---- arch/arm64/boot/dts/ti/k3-am62l.dtsi | 12 ++++++++++++ arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 22 ++++++++++++++++++---- arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 24 ++++++++++++++++++++---- arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 24 ++++++++++++++++++++---- 5 files changed, 90 insertions(+), 16 deletions(-) --- base-commit: f323ed34dc9831effb1ee95403bc364869d29d4c change-id: 20251230-b4-uart-daisy-chain-dts-d01aa40560b2 Best regards, -- Kendall Willis