linux-kernel - Re: [PATCH] serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists

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Message-ID: <2026011648-eject-sanitizer-7e6d@gregkh>
Date: Fri, 16 Jan 2026 16:47:05 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Kendall Willis <k-willis@...com>
Cc: Jiri Slaby <jirislaby@...nel.org>, d-gole@...com, vishalm@...com,
	sebin.francis@...com, msp@...libre.com, khilman@...libre.com,
	a-kaur@...com, s-kochidanadu@...com, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH] serial: 8250: omap: set out-of-band wakeup if wakeup
 pinctrl exists

On Fri, Jan 16, 2026 at 09:37:44AM -0600, Kendall Willis wrote:
> On 1/16/26 07:16, Greg Kroah-Hartman wrote:
> > On Tue, Dec 30, 2025 at 03:24:51PM -0600, Kendall Willis wrote:
> > > In TI K3 SoCs, I/O daisy chaining is used to allow wakeup from UART when
> > > the UART controller is off. Set UART device as wakeup capable using
> > > out-of-band wakeup if the 'wakeup' pinctrl state exists and the device may
> > > wakeup.
> > > 
> > > Signed-off-by: Kendall Willis <k-willis@...com>
> > > ---
> > > Implementation
> > > --------------
> > > This patch is intended to be implemented along with the following
> > > series. This patch has no dependencies on any of the other 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/commits/v6.19/uart-daisy-chain/pmdomain
> > > 
> > > 2. "serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists"
> > >     (this patch): 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": Implements the
> > >     functionality to wakeup the system from the Main UART
> > >     https://github.com/kwillis01/linux/tree/b4/uart-daisy-chain-dts
> > 
> > How am I to pull any of this into the mainline kernel tree?  If this is
> > dependant on those out-of-tree stuff, there's no need for me to take
> > this now, please submit this all together properly.
> 
> This patch has no dependencies on the listed series. I listed them so that
> there was a full picture of the feature implementation. The "pmdomain:
> ti_sci: handle wakeup constraint for out-of-band wakeup" patch has been
> merged already [1]. The "arm64: dts: ti: k3-am62: Support Main UART wakeup"
> series is posted [2] and has a dependency on this patch. Sorry for the
> confusion with the GitHub links, in the future I either won't add them or
> will add lore links instead.
> 
> [1] https://lore.kernel.org/all/20251230-pmdomain-v1-1-3a009d1ff72e@ti.com/
> [2] https://lore.kernel.org/all/20260106-b4-uart-daisy-chain-dts-v3-0-398a66258f2c@ti.com/
> 
> Best,
> Kendall Willis <k-willis@...com>

Great, can you resend this then without that information to confuse me?
:)

thanks,

greg k-h