Re: [PATCH v3 2/2] scsi: ufs-qcom: Keep core_clk_unipro ON while link is active
From: Asutosh Das (asd)
Date: Mon Nov 30 2020 - 21:37:37 EST
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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