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From: Tony Lindgren <tony@atomide.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Petr Mladek <pmladek@suse.com>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jslaby@suse.com>,
	"open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH v1 0/3] console, serial8250: Disable PM and DMA ops
Date: Thu, 17 May 2018 06:56:21 -0700	[thread overview]
Message-ID: <20180517135621.GJ98604@atomide.com> (raw)
In-Reply-To: <ed9879ef42a70d2609f60f73834cabb7e3df9e2f.camel@linux.intel.com>

* Andy Shevchenko <andriy.shevchenko@linux.intel.com> [180516 13:12]:
> On Wed, 2018-05-16 at 12:47 +0200, Sebastian Andrzej Siewior wrote:
> > But since I am on it. You have to enable runtime-PM for the UART. So
> > what is the problem if you simply don't enable it for the UART which
> > used as the kernel console?
> 
> How do I know at the ->probe() time that device in question is going to
> be kernel console? Maybe I missed simple way of it.

Hmm parse the kernel cmdline maybe? :)

BTW, kernel already has earlycon doing exactly what you're trying to do.

Regards,

Tony

  reply	other threads:[~2018-05-17 13:56 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-15 18:34 [PATCH v1 0/3] console, serial8250: Disable PM and DMA ops Andy Shevchenko
2018-05-15 18:34 ` [PATCH v1 1/3] console: introduce ->exit() callback Andy Shevchenko
2018-05-15 18:34 ` [PATCH v1 2/3] serial: 8250_port: Don't use power management for kernel console Andy Shevchenko
2018-05-15 18:34 ` [PATCH v1 3/3] serial: 8250_port: Disable DMA operations " Andy Shevchenko
2018-05-16 10:55   ` Sebastian Andrzej Siewior
2018-05-16 12:58     ` Andy Shevchenko
2018-05-16 18:20       ` Sebastian Andrzej Siewior
2018-05-15 18:37 ` [PATCH v1 0/3] console, serial8250: Disable PM and DMA ops Andy Shevchenko
2018-05-16 10:08   ` Sebastian Andrzej Siewior
2018-05-16 10:17     ` Andy Shevchenko
2018-05-16 10:47       ` Sebastian Andrzej Siewior
2018-05-16 13:10         ` Andy Shevchenko
2018-05-17 13:56           ` Tony Lindgren [this message]
2018-05-17 16:38             ` Andy Shevchenko
2018-05-17 19:30               ` Tony Lindgren
2018-05-22 21:39                 ` Andy Shevchenko
2018-05-23 17:58                   ` Tony Lindgren
2018-05-23 18:32                     ` Tony Lindgren
2018-07-18 15:14                     ` Andy Shevchenko
2018-07-19  6:47                       ` Tony Lindgren
2018-05-17 17:04             ` Tony Lindgren
2018-05-17 13:48         ` Tony Lindgren
2018-05-17 16:36           ` Andy Shevchenko
2018-05-17 19:48             ` Tony Lindgren
2018-05-22 21:52               ` Andy Shevchenko
2018-05-23 18:00                 ` Tony Lindgren
2018-07-18 14:50                   ` Andy Shevchenko
2018-07-19  6:50                     ` Tony Lindgren

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