Subject: Re: [PATCH v4 13/21] PM / devfreq: rockchip-dfi: Pass private data struct to internal functions

From: Jonathan Cameron <[email-masked]>
Date: Tue, 16 May 2023 17:10:43 +0100

On Fri,  5 May 2023 13:38:48 +0200
Sascha Hauer <[email-masked]> wrote:

> The internal functions do not need the struct devfreq_event_dev *,
> so pass them the struct rockchip_dfi *. This is a preparation for
> adding perf support later which doesn't have a struct devfreq_event_dev *.
> 
> Signed-off-by: Sascha Hauer <[email-masked]>

An improvement even without it being needed for the new code.

Reviewed-by: Jonathan Cameron <[email-masked]>

> ---
>  drivers/devfreq/event/rockchip-dfi.c | 15 ++++++---------
>  1 file changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
> index dc48d9c26f599..c0b7b1e9805e9 100644
> --- a/drivers/devfreq/event/rockchip-dfi.c
> +++ b/drivers/devfreq/event/rockchip-dfi.c
> @@ -73,9 +73,8 @@ struct rockchip_dfi {
>  	unsigned int channel_mask;
>  };
>  
> -static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
> +static void rockchip_dfi_start_hardware_counter(struct rockchip_dfi *dfi)
>  {
> -	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
>  	void __iomem *dfi_regs = dfi->regs;
>  
>  	/* clear DDRMON_CTRL setting */
> @@ -102,18 +101,16 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
>  		       dfi_regs + DDRMON_CTRL);
>  }
>  
> -static void rockchip_dfi_stop_hardware_counter(struct devfreq_event_dev *edev)
> +static void rockchip_dfi_stop_hardware_counter(struct rockchip_dfi *dfi)
>  {
> -	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
>  	void __iomem *dfi_regs = dfi->regs;
>  
>  	writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_SOFTWARE_EN),
>  		       dfi_regs + DDRMON_CTRL);
>  }
>  
> -static void rockchip_dfi_read_counters(struct devfreq_event_dev *edev, struct dmc_count *count)
> +static void rockchip_dfi_read_counters(struct rockchip_dfi *dfi, struct dmc_count *count)
>  {
> -	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
>  	u32 i;
>  	void __iomem *dfi_regs = dfi->regs;
>  
> @@ -131,7 +128,7 @@ static int rockchip_dfi_disable(struct devfreq_event_dev *edev)
>  {
>  	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
>  
> -	rockchip_dfi_stop_hardware_counter(edev);
> +	rockchip_dfi_stop_hardware_counter(dfi);
>  	clk_disable_unprepare(dfi->clk);
>  
>  	return 0;
> @@ -148,7 +145,7 @@ static int rockchip_dfi_enable(struct devfreq_event_dev *edev)
>  		return ret;
>  	}
>  
> -	rockchip_dfi_start_hardware_counter(edev);
> +	rockchip_dfi_start_hardware_counter(dfi);
>  	return 0;
>  }
>  
> @@ -166,7 +163,7 @@ static int rockchip_dfi_get_event(struct devfreq_event_dev *edev,
>  	u32 access = 0, total = 0;
>  	int i;
>  
> -	rockchip_dfi_read_counters(edev, &count);
> +	rockchip_dfi_read_counters(dfi, &count);
>  
>  	/* We can only report one channel, so find the busiest one */
>  	for (i = 0; i < DMC_MAX_CHANNELS; i++) {

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