[PATCH V5 03/11] phy: qcom-qmp-ufs: Refactor phy_power_on and phy_calibrate callbacks

Nitin Rawat
2025-05-15T16:27:51Z

Commit 052553af6a31 ("ufs/phy: qcom: Refactor to use phy_init call")
puts enabling regulators & clks, calibrating UFS PHY, starting serdes
and polling PCS ready status into phy_power_on.

In Current code regulators enable, clks enable, calibrating UFS PHY,
start_serdes and polling PCS_ready_status are part of phy_power_on.

UFS PHY registers are retained after power collapse, meaning calibrating
UFS PHY, start_serdes and polling PCS_ready_status can be done only when
hba is powered_on, and not needed every time when phy_power_on is called
during resume. Hence keep the code which enables PHY's regulators & clks
in phy_power_on and move the rest steps into phy_calibrate function.

Refactor the code to retain PHY regulators & clks in phy_power_on and
move out rest of the code to new phy_calibrate function.

Also move reset_control_assert to qmp_ufs_phy_calibrate to align
with Hardware programming guide.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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/phy/qualcomm/phy-qcom-qmp-ufs.c | 26 ++++++-------------------
1 file changed, 6 insertions(+), 20 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index a67cf0a64f74..ade8e9c4b9ae 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -1797,7 +1797,7 @@ static int qmp_ufs_com_exit(struct qmp_ufs *qmp)
return 0;
}

-static int qmp_ufs_init(struct phy *phy)
+static int qmp_ufs_power_on(struct phy *phy)
{
struct qmp_ufs *qmp = phy_get_drvdata(phy);
const struct qmp_phy_cfg *cfg = qmp->cfg;
@@ -1825,10 +1825,6 @@ static int qmp_ufs_init(struct phy *phy)
return ret;
}
}
-
- ret = reset_control_assert(qmp->ufs_reset);
- if (ret)
- return ret;
}

ret = qmp_ufs_com_init(qmp);
@@ -1847,6 +1843,10 @@ static int qmp_ufs_phy_calibrate(struct phy *phy)
unsigned int val;
int ret;

+ ret = reset_control_assert(qmp->ufs_reset);
+ if (ret)
+ return ret;
+
qmp_ufs_init_registers(qmp, cfg);

ret = reset_control_deassert(qmp->ufs_reset);
@@ -1899,21 +1899,6 @@ static int qmp_ufs_exit(struct phy *phy)
return 0;
}

-static int qmp_ufs_power_on(struct phy *phy)
-{
- int ret;
-
- ret = qmp_ufs_init(phy);
- if (ret)
- return ret;
-
- ret = qmp_ufs_phy_calibrate(phy);
- if (ret)
- qmp_ufs_exit(phy);
-
- return ret;
-}
-
static int qmp_ufs_disable(struct phy *phy)
{
int ret;
@@ -1943,6 +1928,7 @@ static int qmp_ufs_set_mode(struct phy *phy, enum phy_mode mode, int submode)
static const struct phy_ops qcom_qmp_ufs_phy_ops = {
.power_on = qmp_ufs_power_on,
.power_off = qmp_ufs_disable,
+ .calibrate = qmp_ufs_phy_calibrate,
.set_mode = qmp_ufs_set_mode,
.owner = THIS_MODULE,
};
--
2.48.1