diff mbox

[03/12] clocksource: sh_tmu: Add clk_prepare/unprepare support

Message ID 1383000569-8916-4-git-send-email-laurent.pinchart+renesas@ideasonboard.com (mailing list archive)
State Superseded
Commit 2d5a628b6227ba3fe12fa746667dc0835a70314b
Headers show

Commit Message

Laurent Pinchart Oct. 28, 2013, 10:49 p.m. UTC
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@linaro.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/clocksource/sh_tmu.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

Comments

Simon Horman Oct. 29, 2013, 5:55 a.m. UTC | #1
On Mon, Oct 28, 2013 at 11:49:20PM +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@linaro.org>
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>  drivers/clocksource/sh_tmu.c | 20 +++++++++++++++++---
>  1 file changed, 17 insertions(+), 3 deletions(-)

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.
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Sergei Shtylyov Oct. 29, 2013, 11:17 a.m. UTC | #2
On 29-10-2013 2:49, 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@linaro.org>
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>   drivers/clocksource/sh_tmu.c | 20 +++++++++++++++++---
>   1 file changed, 17 insertions(+), 3 deletions(-)

> diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
> index 78b8dae..63557cd 100644
> --- a/drivers/clocksource/sh_tmu.c
> +++ b/drivers/clocksource/sh_tmu.c
> @@ -472,12 +472,26 @@ static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
>   		ret = PTR_ERR(p->clk);
>   		goto err1;
>   	}
> +
> +	ret = clk_prepare(p->clk);
> +	if (ret < 0)
> +		goto err2;
> +
>   	p->cs_enabled = false;
>   	p->enable_count = 0;
>
> -	return sh_tmu_register(p, (char *)dev_name(&p->pdev->dev),
> -			       cfg->clockevent_rating,
> -			       cfg->clocksource_rating);
> +	ret = sh_tmu_register(p, (char *)dev_name(&p->pdev->dev),
> +			      cfg->clockevent_rating,
> +			      cfg->clocksource_rating);
> +	if (ret < 0)
> +		goto err3;
> +
> +	return 0;
> +
> + err3:
> +	clk_unprepare(p->clk);
> + err2:
> +	clk_put(p->clk);

    This one seems to be a fix, and should be done separately.

WBR, Sergei

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diff mbox

Patch

diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index 78b8dae..63557cd 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -472,12 +472,26 @@  static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
 		ret = PTR_ERR(p->clk);
 		goto err1;
 	}
+
+	ret = clk_prepare(p->clk);
+	if (ret < 0)
+		goto err2;
+
 	p->cs_enabled = false;
 	p->enable_count = 0;
 
-	return sh_tmu_register(p, (char *)dev_name(&p->pdev->dev),
-			       cfg->clockevent_rating,
-			       cfg->clocksource_rating);
+	ret = sh_tmu_register(p, (char *)dev_name(&p->pdev->dev),
+			      cfg->clockevent_rating,
+			      cfg->clocksource_rating);
+	if (ret < 0)
+		goto err3;
+
+	return 0;
+
+ err3:
+	clk_unprepare(p->clk);
+ err2:
+	clk_put(p->clk);
  err1:
 	iounmap(p->mapbase);
  err0: