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scsi: ufs: ufs-qcom: Enter and exit hibern8 during clock scaling 

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.

Link: https://lore.kernel.org/r/212b7aaf6d834c4a8c682fdac4a59b84013ed573.1632818942.git.nguyenb@codeaurora.org
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Asutosh Das 2021-09-28 02:06:13 -07:00 committed by Martin K. Petersen
parent 525943a586
commit a0cea83332
1 changed files with 11 additions and 1 deletions
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12
drivers/scsi/ufs/ufs-qcom.c
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@ -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: