linux-kernel - Re: [PATCH 01/12] clocksource: sh_cmt: Add clk

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Date:	Wed, 30 Oct 2013 09:10:19 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	linux-arm-kernel@...ts.infradead.org, linux-sh@...r.kernel.org,
	Mike Turquette <mturquette@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/12] clocksource: sh_cmt: Add clk_prepare/unprepare
 support

On Tue, Oct 29, 2013 at 10:55:05AM +0100, Laurent Pinchart wrote:
> Hi Simon,
> 
> On Tuesday 29 October 2013 14:55:35 Simon Horman wrote:
> > On Mon, Oct 28, 2013 at 11:49:18PM +0100, Laurent Pinchart wrote:
> > > Prepare the clock at probe time, as there is no other appropriate place
> > > in the driver where we're allowed to sleep.
> > > 
> > > Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
> > > Cc: linux-kernel@...r.kernel.org
> > > Signed-off-by: Laurent Pinchart
> > > <laurent.pinchart+renesas@...asonboard.com>
> > 
> > Thanks Laurent,
> > 
> > I have queued this up in the clocksources branch of my renesas tree.
> > I will send a pull request to Mike once v3.13-rc1 has hit the shelves.
> > Mike, please let me know if you would prefer something earlier than that.
> 
> I thought the clocksource patches had to go through Daniel's tree. If you can 
> take them directly that's easier, so I'm fine with that. Does this imply your 
> Acked-by (for patches 01 to 03) ?

Sorry, my mistake. The do go through Daniel. As a convenience
I have been picking up Renesas clocksource patches and passing
them on to Daniel. I'm happy to keep doing this. And I'm happy to
go the next step and add some entries to MAINTAINERS if that is
useful to others.

As I mentioned above I have queued these up (though not yet pushed them
as I got bogged down yesterday afternoon). But if you would
prefer Daniel to take them directly then please use the following:

Patches 01 - 03:

Acked-by: Simon Horman <horms+renesas@...ge.net.au>

> 
> > > ---
> > > 
> > >  drivers/clocksource/sh_cmt.c | 20 ++++++++++++++++----
> > >  1 file changed, 16 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
> > > index 0965e98..940341a 100644
> > > --- a/drivers/clocksource/sh_cmt.c
> > > +++ b/drivers/clocksource/sh_cmt.c
> > > @@ -634,12 +634,18 @@ static int sh_cmt_clock_event_next(unsigned long
> > > delta,> 
> > >  static void sh_cmt_clock_event_suspend(struct clock_event_device *ced)
> > >  {
> > > -	pm_genpd_syscore_poweroff(&ced_to_sh_cmt(ced)->pdev->dev);
> > > +	struct sh_cmt_priv *p = ced_to_sh_cmt(ced);
> > > +
> > > +	pm_genpd_syscore_poweroff(&p->pdev->dev);
> > > +	clk_unprepare(p->clk);
> > >  }
> > >  
> > >  static void sh_cmt_clock_event_resume(struct clock_event_device *ced)
> > >  {
> > > -	pm_genpd_syscore_poweron(&ced_to_sh_cmt(ced)->pdev->dev);
> > > +	struct sh_cmt_priv *p = ced_to_sh_cmt(ced);
> > > +
> > > +	clk_prepare(p->clk);
> > > +	pm_genpd_syscore_poweron(&p->pdev->dev);
> > >  }
> > >  
> > >  static void sh_cmt_register_clockevent(struct sh_cmt_priv *p,
> > > 
> > > @@ -737,6 +743,10 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct
> > > platform_device *pdev)> 
> > >  		goto err2;
> > >  	}
> > > 
> > > +	ret = clk_prepare(p->clk);
> > > +	if (ret < 0)
> > > +		goto err3;
> > > +
> > >  	if (res2 && (resource_size(res2) == 4)) {
> > >  		/* assume both CMSTR and CMCSR to be 32-bit */
> > >  		p->read_control = sh_cmt_read32;
> > > @@ -773,19 +783,21 @@ static int sh_cmt_setup(struct sh_cmt_priv *p,
> > > struct platform_device *pdev)> 
> > >  			      cfg->clocksource_rating);
> > >  	if (ret) {
> > >  		dev_err(&p->pdev->dev, "registration failed\n");
> > > -		goto err3;
> > > +		goto err4;
> > >  	}
> > >  	p->cs_enabled = false;
> > >  	
> > >  	ret = setup_irq(irq, &p->irqaction);
> > >  	if (ret) {
> > >  		dev_err(&p->pdev->dev, "failed to request irq %d\n", irq);
> > > -		goto err3;
> > > +		goto err4;
> > >  	}
> > >  	
> > >  	platform_set_drvdata(pdev, p);
> > >  	
> > >  	return 0;
> > > 
> > > +err4:
> > > +	clk_unprepare(p->clk);
> > >  err3:
> > >  	clk_put(p->clk);
> > >  err2:
> -- 
> Regards,
> 
> Laurent Pinchart
> 
> --
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