[PATCH v1 3/6] phy: qcom-qusb2: Power-on PHY before initialization

[Manu Gautam]

PHY must be powered on before turning ON clocks and
attempting to initialize it. Driver is exposing
separate init and power_on routines for this.
Apparently USB dwc3 core driver performs power-on
after init. Also, poweron and init for QUSB2 PHY
need to be executed together always, hence remove
poweron callback from phy_ops and explicitly perform
this from init, similar changes needed for poweroff.

Signed-off-by: Manu Gautam <mgau...@codeaurora.org>

diff --git a/drivers/phy/qualcomm/phy-qcom-qusb2.c 
b/drivers/phy/qualcomm/phy-qcom-qusb2.c
index 6c57524..fa60a99 100644
--- a/drivers/phy/qualcomm/phy-qcom-qusb2.c
+++ b/drivers/phy/qualcomm/phy-qcom-qusb2.c
@@ -195,13 +195,13 @@ static void qusb2_phy_set_tune2_param(struct qusb2_phy 
*qphy)
        qusb2_setbits(qphy->base, QUSB2PHY_PORT_TUNE2, val[0] << 0x4);
 }
 
-static int qusb2_phy_poweron(struct phy *phy)
+static int qusb2_phy_poweron(struct qusb2_phy *qphy)
 {
-       struct qusb2_phy *qphy = phy_get_drvdata(phy);
+       struct device *dev = &qphy->phy->dev;
        int num = ARRAY_SIZE(qphy->vregs);
        int ret;
 
-       dev_vdbg(&phy->dev, "%s(): Powering-on QUSB2 phy\n", __func__);
+       dev_vdbg(dev, "%s(): Powering-on QUSB2 phy\n", __func__);
 
        /* turn on regulator supplies */
        ret = regulator_bulk_enable(num, qphy->vregs);
@@ -210,7 +210,7 @@ static int qusb2_phy_poweron(struct phy *phy)
 
        ret = clk_prepare_enable(qphy->iface_clk);
        if (ret) {
-               dev_err(&phy->dev, "failed to enable iface_clk, %d\n", ret);
+               dev_err(dev, "failed to enable iface_clk, %d\n", ret);
                regulator_bulk_disable(num, qphy->vregs);
                return ret;
        }
@@ -218,10 +218,8 @@ static int qusb2_phy_poweron(struct phy *phy)
        return 0;
 }
 
-static int qusb2_phy_poweroff(struct phy *phy)
+static int qusb2_phy_poweroff(struct qusb2_phy *qphy)
 {
-       struct qusb2_phy *qphy = phy_get_drvdata(phy);
-
        clk_disable_unprepare(qphy->iface_clk);
 
        regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs);
@@ -238,11 +236,15 @@ static int qusb2_phy_init(struct phy *phy)
 
        dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__);
 
+       ret = qusb2_phy_poweron(qphy);
+       if (ret)
+               return ret;
+
        /* enable ahb interface clock to program phy */
        ret = clk_prepare_enable(qphy->cfg_ahb_clk);
        if (ret) {
                dev_err(&phy->dev, "failed to enable cfg ahb clock, %d\n", ret);
-               return ret;
+               goto poweroff_phy;
        }
 
        /* Perform phy reset */
@@ -344,6 +346,9 @@ static int qusb2_phy_init(struct phy *phy)
        reset_control_assert(qphy->phy_reset);
 disable_ahb_clk:
        clk_disable_unprepare(qphy->cfg_ahb_clk);
+poweroff_phy:
+       qusb2_phy_poweroff(qphy);
+
        return ret;
 }
 
@@ -362,14 +367,14 @@ static int qusb2_phy_exit(struct phy *phy)
 
        clk_disable_unprepare(qphy->cfg_ahb_clk);
 
+       qusb2_phy_poweroff(qphy);
+
        return 0;
 }
 
 static const struct phy_ops qusb2_phy_gen_ops = {
        .init           = qusb2_phy_init,
        .exit           = qusb2_phy_exit,
-       .power_on       = qusb2_phy_poweron,
-       .power_off      = qusb2_phy_poweroff,
        .owner          = THIS_MODULE,
 };
 
-- 
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