Re: [PATCH v7 07/28] media: rockchip: rga: use clk_bulk api

[Michael Tretter <m.tretter@pengutronix.de>]

On Thu, 21 May 2026 00:44:12 +0200, Sven Püschel wrote:
> Use the clk_bulk API to avoid code duplication for each of the three
> clocks.
> 
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> Signed-off-by: Sven Püschel <s.pueschel@pengutronix.de>
> ---
>  drivers/media/platform/rockchip/rga/rga.c | 65 ++++---------------------------
>  drivers/media/platform/rockchip/rga/rga.h |  6 +--
>  2 files changed, 11 insertions(+), 60 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rga/rga.c b/drivers/media/platform/rockchip/rga/rga.c
> index fea63b94c5f3d..4e710a050cb7c 100644
> --- a/drivers/media/platform/rockchip/rga/rga.c
> +++ b/drivers/media/platform/rockchip/rga/rga.c
> @@ -698,48 +698,10 @@ static const struct video_device rga_videodev = {
>  	.device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING,
>  };
>  
> -static int rga_enable_clocks(struct rockchip_rga *rga)
> -{
> -	int ret;
> -
> -	ret = clk_prepare_enable(rga->sclk);
> -	if (ret) {
> -		dev_err(rga->dev, "Cannot enable rga sclk: %d\n", ret);
> -		return ret;
> -	}
> -
> -	ret = clk_prepare_enable(rga->aclk);
> -	if (ret) {
> -		dev_err(rga->dev, "Cannot enable rga aclk: %d\n", ret);
> -		goto err_disable_sclk;
> -	}
> -
> -	ret = clk_prepare_enable(rga->hclk);
> -	if (ret) {
> -		dev_err(rga->dev, "Cannot enable rga hclk: %d\n", ret);
> -		goto err_disable_aclk;
> -	}
> -
> -	return 0;
> -
> -err_disable_aclk:
> -	clk_disable_unprepare(rga->aclk);
> -err_disable_sclk:
> -	clk_disable_unprepare(rga->sclk);
> -
> -	return ret;
> -}
> -
> -static void rga_disable_clocks(struct rockchip_rga *rga)
> -{
> -	clk_disable_unprepare(rga->sclk);
> -	clk_disable_unprepare(rga->hclk);
> -	clk_disable_unprepare(rga->aclk);
> -}
> -
>  static int rga_parse_dt(struct rockchip_rga *rga)
>  {
>  	struct reset_control *core_rst, *axi_rst, *ahb_rst;
> +	int ret;
>  
>  	core_rst = devm_reset_control_get(rga->dev, "core");
>  	if (IS_ERR(core_rst)) {
> @@ -771,23 +733,12 @@ static int rga_parse_dt(struct rockchip_rga *rga)
>  	udelay(1);
>  	reset_control_deassert(ahb_rst);
>  
> -	rga->sclk = devm_clk_get(rga->dev, "sclk");
> -	if (IS_ERR(rga->sclk)) {
> -		dev_err(rga->dev, "failed to get sclk clock\n");
> -		return PTR_ERR(rga->sclk);
> -	}
> -
> -	rga->aclk = devm_clk_get(rga->dev, "aclk");
> -	if (IS_ERR(rga->aclk)) {
> -		dev_err(rga->dev, "failed to get aclk clock\n");
> -		return PTR_ERR(rga->aclk);
> -	}
> -
> -	rga->hclk = devm_clk_get(rga->dev, "hclk");
> -	if (IS_ERR(rga->hclk)) {
> -		dev_err(rga->dev, "failed to get hclk clock\n");
> -		return PTR_ERR(rga->hclk);
> +	ret = devm_clk_bulk_get_all(rga->dev, &rga->clks);
> +	if (ret < 0) {

This changes the behavior since the call is now successful if there are
no clocks specified in the device tree. Is this an intended change?

Michael

> +		dev_err(rga->dev, "failed to get clocks\n");
> +		return ret;
>  	}
> +	rga->num_clks = ret;
>  
>  	return 0;
>  }
> @@ -935,7 +886,7 @@ static int __maybe_unused rga_runtime_suspend(struct device *dev)
>  {
>  	struct rockchip_rga *rga = dev_get_drvdata(dev);
>  
> -	rga_disable_clocks(rga);
> +	clk_bulk_disable_unprepare(rga->num_clks, rga->clks);
>  
>  	return 0;
>  }
> @@ -944,7 +895,7 @@ static int __maybe_unused rga_runtime_resume(struct device *dev)
>  {
>  	struct rockchip_rga *rga = dev_get_drvdata(dev);
>  
> -	return rga_enable_clocks(rga);
> +	return clk_bulk_prepare_enable(rga->num_clks, rga->clks);
>  }
>  
>  static const struct dev_pm_ops rga_pm = {
> diff --git a/drivers/media/platform/rockchip/rga/rga.h b/drivers/media/platform/rockchip/rga/rga.h
> index 72a28b120fabf..2db10acecb405 100644
> --- a/drivers/media/platform/rockchip/rga/rga.h
> +++ b/drivers/media/platform/rockchip/rga/rga.h
> @@ -6,6 +6,7 @@
>  #ifndef __RGA_H__
>  #define __RGA_H__
>  
> +#include <linux/clk.h>
>  #include <linux/platform_device.h>
>  #include <media/videobuf2-v4l2.h>
>  #include <media/v4l2-ctrls.h>
> @@ -81,9 +82,8 @@ struct rockchip_rga {
>  	struct device *dev;
>  	struct regmap *grf;
>  	void __iomem *regs;
> -	struct clk *sclk;
> -	struct clk *aclk;
> -	struct clk *hclk;
> +	struct clk_bulk_data *clks;
> +	int num_clks;
>  	struct rockchip_rga_version version;
>  
>  	/* vfd lock */
> 
> -- 
> 2.54.0
> 
>