From: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
Qualcomm controller needs to be in hibern8 before scaling clocks.
This change puts the controller in hibern8 state before scaling
and brings it out after scaling of clocks.
Signed-off-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
Signed-off-by: Bao D. Nguyen <nguyenb@xxxxxxxxxxxxxx>
---
drivers/scsi/ufs/ufs-qcom.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 92d4c61..92f5bb4 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1212,24 +1212,34 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
int err = 0;
if (status == PRE_CHANGE) {
+ err = ufshcd_uic_hibern8_enter(hba);
+ if (err)
+ return err;
if (scale_up)
err = ufs_qcom_clk_scale_up_pre_change(hba);
else
err = ufs_qcom_clk_scale_down_pre_change(hba);
+ if (err)
+ ufshcd_uic_hibern8_exit(hba);
+
} else {
if (scale_up)
err = ufs_qcom_clk_scale_up_post_change(hba);
else
err = ufs_qcom_clk_scale_down_post_change(hba);
- if (err || !dev_req_params)
+
+ if (err || !dev_req_params) {
+ ufshcd_uic_hibern8_exit(hba);
goto out;
+ }
ufs_qcom_cfg_timers(hba,
dev_req_params->gear_rx,
dev_req_params->pwr_rx,
dev_req_params->hs_rate,
false);
+ ufshcd_uic_hibern8_exit(hba);
}
out:
--
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