From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Conor Dooley <conor@kernel.org>
Cc: "Jisheng Zhang" <jszhang@kernel.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Rob Herring" <robh+dt@kernel.org>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Jiri Slaby" <jirislaby@kernel.org>,
linux-serial@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: serial: snps-dw-apb-uart: make interrupt optional
Date: Thu, 3 Aug 2023 14:40:05 +0300 [thread overview]
Message-ID: <ZMuSFYQ4YyIKnI0k@smile.fi.intel.com> (raw)
In-Reply-To: <20230802-risk-getting-e6005e86be81@spud>
On Wed, Aug 02, 2023 at 11:53:59PM +0100, Conor Dooley wrote:
> On Thu, Aug 03, 2023 at 12:57:44AM +0300, Andy Shevchenko wrote:
> > On Wed, Aug 02, 2023 at 04:43:48PM +0100, Conor Dooley wrote:
> > > On Wed, Aug 02, 2023 at 11:05:44PM +0800, Jisheng Zhang wrote:
> > > > The driver fall back to poll style when there's no irq. "poll" still
> > > > looks better than no support.
> > >
> > > What is the user for this where the interrupt is not actually wired up
> > > in the hardware?
> >
> > FYI: kernel console doesn't use interrupts, so for example it might be
> > the debug port. Note, I have no idea of the Zhang's case, just my assumption.
>
> I'm less interested in what the software is doing, it's what the device
> that has not connected the interrupt is that I am curious about.
As I said. The hw may be purely for debugging purposes (and yes, I have heard
about such a hardware).
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-08-03 11:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-02 15:05 [PATCH 0/2] serial: 8250_dw: fall back to poll if there's no interrupt Jisheng Zhang
2023-08-02 15:05 ` [PATCH 1/2] dt-bindings: serial: snps-dw-apb-uart: make interrupt optional Jisheng Zhang
2023-08-02 15:43 ` Conor Dooley
2023-08-02 21:57 ` Andy Shevchenko
2023-08-02 22:53 ` Conor Dooley
2023-08-03 11:40 ` Andy Shevchenko [this message]
2023-08-06 9:40 ` Jisheng Zhang
2023-08-02 15:05 ` [PATCH 2/2] serial: 8250_dw: fall back to poll if there's no interrupt Jisheng Zhang
2023-08-02 21:56 ` Andy Shevchenko
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