Pad tracking is a one-time calibration for Tegra186 and Tegra194.
Clk should be disabled after calibration.

Disable clk after calibration.
While at it add 100us delay for HW recording the calibration value.

Signed-off-by: Wayne Chang <redacted>
---
V2 -> V3:nothing has changed
V1 -> V2:update the commit message.
  drivers/phy/tegra/xusb-tegra186.c | 6 ++++--
  1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c
index 0996ede63387..f121b4ffbbfd 100644
--- a/drivers/phy/tegra/xusb-tegra186.c
+++ b/drivers/phy/tegra/xusb-tegra186.c

@@ -609,6 +609,10 @@ static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl)
  	value &= ~USB2_PD_TRK;
  	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
  
+	udelay(100);
+
+	clk_disable_unprepare(priv->usb2_trk_clk);
+
  	mutex_unlock(&padctl->lock);
  }
  

@@ -633,8 +637,6 @@ static void tegra186_utmi_bias_pad_power_off(struct tegra_xusb_padctl *padctl)
  	value |= USB2_PD_TRK;
  	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
  
-	clk_disable_unprepare(priv->usb2_trk_clk);
-
  	mutex_unlock(&padctl->lock);
  }