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>
---
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 a5b7148..55b1de5 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1305,18 +1305,27 @@ 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,
@@ -1324,6 +1333,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
dev_req_params->hs_rate,
false);
ufs_qcom_update_bus_bw_vote(host);
+ ufshcd_uic_hibern8_exit(hba);
}
out:
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
