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

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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@xxxxxxxxxxxxxx>
Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
---

Reviewed-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>

  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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