@@ -639,26 +639,17 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op,
enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
- struct phy *phy = host->generic_phy;
if (status == PRE_CHANGE)
return 0;
- if (ufs_qcom_is_link_off(hba)) {
- /*
- * Disable the tx/rx lane symbol clocks before PHY is
- * powered down as the PLL source should be disabled
- * after downstream clocks are disabled.
- */
+ if (!ufs_qcom_is_link_active(hba))
ufs_qcom_disable_lane_clks(host);
- phy_power_off(phy);
- /* reset the connected UFS device during power down */
- ufs_qcom_device_reset_ctrl(hba, true);
- } else if (!ufs_qcom_is_link_active(hba)) {
- ufs_qcom_disable_lane_clks(host);
- }
+ /* reset the connected UFS device during power down */
+ if (ufs_qcom_is_link_off(hba) && host->device_reset)
+ ufs_qcom_device_reset_ctrl(hba, true);
return ufs_qcom_ice_suspend(host);
}
@@ -666,26 +657,11 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op,
static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
- struct phy *phy = host->generic_phy;
int err;
- if (ufs_qcom_is_link_off(hba)) {
- err = phy_power_on(phy);
- if (err) {
- dev_err(hba->dev, "%s: failed PHY power on: %d\n",
- __func__, err);
- return err;
- }
-
- err = ufs_qcom_enable_lane_clks(host);
- if (err)
- return err;
-
- } else if (!ufs_qcom_is_link_active(hba)) {
- err = ufs_qcom_enable_lane_clks(host);
- if (err)
- return err;
- }
+ err = ufs_qcom_enable_lane_clks(host);
+ if (err)
+ return err;
return ufs_qcom_ice_resume(host);
}
@@ -1042,6 +1018,8 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+ struct phy *phy = host->generic_phy;
+ int err;
/*
* In case ufs_qcom_init() is not yet done, simply ignore.
@@ -1060,10 +1038,22 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
/* disable device ref_clk */
ufs_qcom_dev_ref_clk_ctrl(host, false);
}
+ err = phy_power_off(phy);
+ if (err) {
+ dev_err(hba->dev, "%s: phy power off failed, ret=%d\n",
+ __func__, err);
+ return err;
+ }
}
break;
case POST_CHANGE:
if (on) {
+ err = phy_power_on(phy);
+ if (err) {
+ dev_err(hba->dev, "%s: phy power on failed, ret = %d\n",
+ __func__, err);
+ return err;
+ }
/* enable the device ref clock for HS mode*/
if (ufshcd_is_hs_mode(&hba->pwr_info))
ufs_qcom_dev_ref_clk_ctrl(host, true);
@@ -1246,9 +1236,10 @@ static int ufs_qcom_init(struct ufs_hba *hba)
static void ufs_qcom_exit(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+ struct phy *phy = host->generic_phy;
ufs_qcom_disable_lane_clks(host);
- phy_power_off(host->generic_phy);
+ phy_power_off(phy);
phy_exit(host->generic_phy);
}
Commit 3f6d1767b1a0 ("phy: ufs-qcom: Refactor all init steps into phy_poweron") removes the phy_power_on/off from ufs_qcom_setup_clocks to suspend/resume func. To have a better power saving, remove the phy_power_on/off calls from resume/suspend path and put them back to ufs_qcom_setup_clocks, so that PHY regulators & clks can be turned on/off along with UFS's clocks. Since phy phy_power_on is separated out from phy calibrate, make separate calls to phy_power_on and phy_calibrate calls from ufs qcom driver. Co-developed-by: Can Guo <quic_cang@quicinc.com> Signed-off-by: Can Guo <quic_cang@quicinc.com> Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> --- drivers/ufs/host/ufs-qcom.c | 55 ++++++++++++++++--------------------- 1 file changed, 23 insertions(+), 32 deletions(-)