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scsi: ufs: Don't disable core_clk_unipro if the link is active

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If we want to disable clocks but still keep the link active, both
ref_clk and core_clk_unipro should be skipped.

Commit 284fa080cb5f ("scsi: ufs: fix broken hibern8_on_idle sysfs
nodes") is the original change from msm-4.14. We pick it up to msm-5.4
due to upstream missed this change. To follow GKI policy on 5.4, we
simplifed it and kept parameters name to avoid breaking ABI.

Change-Id: I5f86775c150e495322d14ec57ebf76a710257931
Signed-off-by: Ziqi Chen <ziqichen@codeaurora.org>
This commit is contained in:
Ziqi Chen 2020-11-25 11:23:03 +08:00
commit b6322f77e6
1 changed files with 10 additions and 0 deletions
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10
drivers/scsi/ufs/ufshcd.c
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@ -8246,7 +8246,17 @@ static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
list_for_each_entry(clki, head, list) {
if (!IS_ERR_OR_NULL(clki->clk)) {
#if defined(CONFIG_SCSI_UFSHCD_QTI)
/*
* To keep link active, ref_clk and core_clk_unipro
* should be kept ON.
*/
if (skip_ref_clk &&
(!strcmp(clki->name, "ref_clk") ||
!strcmp(clki->name, "core_clk_unipro")))
#else
if (skip_ref_clk && !strcmp(clki->name, "ref_clk"))
#endif
continue;
clk_state_changed = on ^ clki->enabled;