Re: [PATCH v2 2/2] scsi: ufs-qcom: Keep core_clk_unipro ON while link is active

[hongwus@codeaurora.org]

On 2020-11-24 15:28, Can Guo wrote:
> If we want to disable clocks to save power but still keep the link 
> active,
> core_clk_unipro, as same as ref_clk, should not be the one being 
> disabled.
> 
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
>  drivers/scsi/ufs/ufs-qcom.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index f9d6ef3..70df357 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -977,6 +977,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct ufs_qcom_host *host;
>  	struct resource *res;
> +	struct ufs_clk_info *clki;
> 
>  	if (strlen(android_boot_dev) && strcmp(android_boot_dev, 
> dev_name(dev)))
>  		return -ENODEV;
> @@ -1075,6 +1076,11 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>  		}
>  	}
> 
> +	list_for_each_entry(clki, &hba->clk_list_head, list) {
> +		if (!strcmp(clki->name, "core_clk_unipro"))
> +			clki->always_on_while_link_active = true;
> +	}
> +
>  	err = ufs_qcom_init_lane_clks(host);
>  	if (err)
>  		goto out_variant_clear;

Reviewed-by: Hongwu Su<hongwus@codeaurora.org>