scsi: ufs-qcom: Keep core_clk_unipro on while link is active

If we want to disable clocks to save power but still keep the link active,
core_clk_unipro, like ref_clk, should not be the one being disabled.

Link: https://lore.kernel.org/r/1606356063-38380-3-git-send-email-cang@codeaurora.org
Reviewed-by: Hongwu Su <hongwus@codeaurora.org>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 1e434cc..2206b1e 100644 (file)
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -959,6 +959,7 @@ 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;
@@ -1057,6 +1058,11 @@ 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;