[v2,2/2] ASoC: rockchip: i2s: add support for grabbing output clock to codec
diff mbox

Message ID 1416384567-29476-1-git-send-email-jay.xu@rock-chips.com
State New, archived
Headers show

Commit Message

Jianqun Xu Nov. 19, 2014, 8:09 a.m. UTC
Patch is from Sonny Rao <sonnyrao@chromium.org>

We need to claim the clock which is driving the codec so that when we enable
clock gating, we continue to clock the codec when needed.  I make this an
optional clock since there might be some applications where we don't need it
but can still use the I2S block.

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
---
changes since v1:
- modify commit message

 sound/soc/rockchip/rockchip_i2s.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Heiko Stübner Nov. 19, 2014, 10:17 a.m. UTC | #1
Hi Jianqun,


Am Mittwoch, 19. November 2014, 16:09:27 schrieb Jianqun Xu:
> Patch is from Sonny Rao <sonnyrao@chromium.org>
that line above should read exactly:
From: Sonny Rao <sonnyrao@chromium.org>

that way git will also set the author correctly when importing the patch mbox.

> 
> We need to claim the clock which is driving the codec so that when we enable
> clock gating, we continue to clock the codec when needed.  I make this an
> optional clock since there might be some applications where we don't need
> it but can still use the I2S block.
> 
> Signed-off-by: Sonny Rao <sonnyrao@chromium.org>

I think we you're submitting someone elses patch you'll need a Signed-off-by 
line for yourself too [which marks that you were allowed to submit it etc], so 
it should read something like

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>


> ---
> changes since v1:
> - modify commit message
> 
>  sound/soc/rockchip/rockchip_i2s.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/sound/soc/rockchip/rockchip_i2s.c
> b/sound/soc/rockchip/rockchip_i2s.c index c74ba37..2820ade 100644
> --- a/sound/soc/rockchip/rockchip_i2s.c
> +++ b/sound/soc/rockchip/rockchip_i2s.c
> @@ -28,6 +28,7 @@ struct rk_i2s_dev {
> 
>  	struct clk *hclk;
>  	struct clk *mclk;
> +	struct clk *oclk;
> 
>  	struct snd_dmaengine_dai_dma_data capture_dma_data;
>  	struct snd_dmaengine_dai_dma_data playback_dma_data;
> @@ -439,6 +440,14 @@ static int rockchip_i2s_probe(struct platform_device
> *pdev) return PTR_ERR(i2s->mclk);
>  	}
> 
> +	i2s->oclk = devm_clk_get(&pdev->dev, "i2s_clk_out");
> +	if (IS_ERR(i2s->oclk)) {
> +		dev_dbg(&pdev->dev, "Didn't find output clock\n");
> +		i2s->oclk = NULL;
> +	}

blank line here?

> +	if (i2s->oclk)
> +		ret = clk_prepare_enable(i2s->oclk);
> +
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	regs = devm_ioremap_resource(&pdev->dev, res);
>  	if (IS_ERR(regs))
> @@ -505,6 +514,8 @@ static int rockchip_i2s_remove(struct platform_device
> *pdev) if (!pm_runtime_status_suspended(&pdev->dev))
>  		i2s_runtime_suspend(&pdev->dev);
> 
> +	if (i2s->oclk)
> +		clk_disable_unprepare(i2s->oclk);
>  	clk_disable_unprepare(i2s->mclk);
>  	clk_disable_unprepare(i2s->hclk);
>  	snd_dmaengine_pcm_unregister(&pdev->dev);


Heiko
Kever Yang Nov. 19, 2014, 10:27 a.m. UTC | #2
Hi Jay,

On 11/19/2014 04:09 PM, Jianqun Xu wrote:
> Patch is from Sonny Rao <sonnyrao@chromium.org>
Here should be,

From: Sonny Rao <sonnyrao@chromium.org>

- Kever

Patch
diff mbox

diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
index c74ba37..2820ade 100644
--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -28,6 +28,7 @@  struct rk_i2s_dev {
 
 	struct clk *hclk;
 	struct clk *mclk;
+	struct clk *oclk;
 
 	struct snd_dmaengine_dai_dma_data capture_dma_data;
 	struct snd_dmaengine_dai_dma_data playback_dma_data;
@@ -439,6 +440,14 @@  static int rockchip_i2s_probe(struct platform_device *pdev)
 		return PTR_ERR(i2s->mclk);
 	}
 
+	i2s->oclk = devm_clk_get(&pdev->dev, "i2s_clk_out");
+	if (IS_ERR(i2s->oclk)) {
+		dev_dbg(&pdev->dev, "Didn't find output clock\n");
+		i2s->oclk = NULL;
+	}
+	if (i2s->oclk)
+		ret = clk_prepare_enable(i2s->oclk);
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(regs))
@@ -505,6 +514,8 @@  static int rockchip_i2s_remove(struct platform_device *pdev)
 	if (!pm_runtime_status_suspended(&pdev->dev))
 		i2s_runtime_suspend(&pdev->dev);
 
+	if (i2s->oclk)
+		clk_disable_unprepare(i2s->oclk);
 	clk_disable_unprepare(i2s->mclk);
 	clk_disable_unprepare(i2s->hclk);
 	snd_dmaengine_pcm_unregister(&pdev->dev);