Re: [PATCH v5 11/25] PM / devfreq: rockchip-dfi: Handle LPDDR2 correctly

[Sebastian Reichel]

Hi,

On Wed, May 24, 2023 at 10:31:39AM +0200, Sascha Hauer wrote:
> According to the downstream driver the DDRMON_CTRL_LPDDR23 bit must be
> set for both LPDDR2 and LPDDR3. Add the missing LPDDR2 case and while
> at it turn the if/else if/else into switch/case which makes it easier
> to read.
> 
> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> ---

Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>

-- Sebastian

>  drivers/devfreq/event/rockchip-dfi.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
> index 261d112580c9e..16cd5365671f7 100644
> --- a/drivers/devfreq/event/rockchip-dfi.c
> +++ b/drivers/devfreq/event/rockchip-dfi.c
> @@ -82,12 +82,19 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
>  		       DDRMON_CTRL_HARDWARE_EN), dfi_regs + DDRMON_CTRL);
>  
>  	/* set ddr type to dfi */
> -	if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR3)
> +	switch (dfi->ddr_type) {
> +	case ROCKCHIP_DDRTYPE_LPDDR2:
> +	case ROCKCHIP_DDRTYPE_LPDDR3:
>  		writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR23, DDRMON_CTRL_DDR_TYPE_MASK),
>  			       dfi_regs + DDRMON_CTRL);
> -	else if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR4)
> +		break;
> +	case ROCKCHIP_DDRTYPE_LPDDR4:
>  		writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR4, DDRMON_CTRL_DDR_TYPE_MASK),
>  			       dfi_regs + DDRMON_CTRL);
> +		break;
> +	default:
> +		break;
> +	}
>  
>  	/* enable count, use software mode */
>  	writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_SOFTWARE_EN, DDRMON_CTRL_SOFTWARE_EN),
> -- 
> 2.39.2
>

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