[PATCH v1 2/2] scsi: ufs-qcom: enter and exit hibern8 during clock scaling

[Asutosh Das]

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 <asuto...@codeaurora.org>
---
 drivers/scsi/ufs/ufs-qcom.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index a5b7148..d117088 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1305,6 +1305,9 @@ 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
@@ -1324,6 +1327,7 @@ 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:
-- 
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