[PATCH v2 0/5] arm64: dts: ti: k3-am62: Support Main UART wakeup

[Dhruva Gole]

On Dec 30, 2025 at 20:38:19 -0600, Kendall Willis wrote:
> 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

For the series,
Reviewed-by: Dhruva Gole <d-gole at ti.com>

> 
> 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 <k-willis at ti.com>
> 

-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated