Re: [PATCH v3 2/2] scsi: ufs-qcom: Keep core_clk_unipro ON while link is active

["Asutosh Das (asd)" <asutoshd@codeaurora.org>]

On 11/25/2020 6:01 PM, 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.
> 
> Reviewed-by: Hongwu Su<hongwus@codeaurora.org>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---

Reviewed-by: Asutosh Das <asutoshd@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..8a7fc62 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->keep_link_active = true;
> +	}
> +
>   	err = ufs_qcom_init_lane_clks(host);
>   	if (err)
>   		goto out_variant_clear;
> 


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