lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 20 Oct 2014 15:15:14 +0200
From:	Ludovic Desroches <ludovic.desroches@...el.com>
To:	Wenyou Yang <wenyou.yang@...el.com>, <wsa@...-dreams.de>,
	<linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<nicolas.ferre@...el.com>, <linux-arm-kernel@...ts.infradead.org>
CC:	<khilman@...nel.org>
Subject: Re: [PATCH 2/3] i2c/at91: add support for system PM

Adding Kevin in the CC list since he had some comments about the PM
runtime support for the SPI driver.

On Mon, Oct 20, 2014 at 02:42:42PM +0200, Ludovic Desroches wrote:
> On Mon, Oct 20, 2014 at 11:42:13AM +0800, Wenyou Yang wrote:
> > Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>
> 
> Acked by: Ludovic Desroches <ludovic.desroches@...el.com>
> 
> > ---
> >  drivers/i2c/busses/i2c-at91.c |   30 ++++++++++++++++++++++++++++++
> >  1 file changed, 30 insertions(+)
> > 
> > diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
> > index 03b9f48..8f408f8 100644
> > --- a/drivers/i2c/busses/i2c-at91.c
> > +++ b/drivers/i2c/busses/i2c-at91.c
> > @@ -845,6 +845,35 @@ static int at91_twi_remove(struct platform_device *pdev)
> >  }
> >  
> >  #ifdef CONFIG_PM
> > +#ifdef CONFIG_PM_SLEEP
> > +static int at91_twi_suspend(struct device *dev)
> > +{
> > +	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);
> > +
> > +	if (!pm_runtime_suspended(dev))
> > +		clk_disable_unprepare(twi_dev->clk);
> > +
> > +	return 0;
> > +}
> > +
> > +static int at91_twi_resume(struct device *dev)
> > +{
> > +	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);
> > +	int ret;
> > +
> > +	if (!pm_runtime_suspended(dev)) {
> > +		ret = clk_prepare_enable(twi_dev->clk);
> > +		if (ret)
> > +			return ret;
> > +	}
> > +
> > +	pm_runtime_mark_last_busy(dev);
> > +	pm_request_autosuspend(dev);
> > +
> > +	return 0;
> > +}
> > +#endif
> > +
> >  #ifdef CONFIG_PM_RUNTIME
> >  static int at91_twi_runtime_suspend(struct device *dev)
> >  {
> > @@ -864,6 +893,7 @@ static int at91_twi_runtime_resume(struct device *dev)
> >  #endif
> >  
> >  static const struct dev_pm_ops at91_twi_pm = {
> > +	SET_SYSTEM_SLEEP_PM_OPS(at91_twi_suspend, at91_twi_resume)
> >  	SET_RUNTIME_PM_OPS(at91_twi_runtime_suspend,
> >  				at91_twi_runtime_resume, NULL)
> >  };
> > -- 
> > 1.7.9.5
> > 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists