phy: tegra: xusb: Decouple CYA_TRK_CODE_UPDATE_ON_IDLE from trk_hw_mode

JIRA: https://issues.redhat.com/browse/RHEL-116007

commit 24c63c5
Author: Wayne Chang <[email protected]>
Date: Mon, 19 May 2025 17:09:28 +0800

  The logic that drives the pad calibration values resides in the
  controller reset domain and so the calibration values are only being
  captured when the controller is out of reset. However, by clearing the
  CYA_TRK_CODE_UPDATE_ON_IDLE bit, the calibration values can be set
  while the controller is in reset.

  The CYA_TRK_CODE_UPDATE_ON_IDLE bit was previously cleared based on the
  trk_hw_mode flag, but this dependency is not necessary. Instead,
  introduce a new flag, trk_update_on_idle, to independently control this
  bit.

  Fixes: d8163a3 ("phy: tegra: xusb: Add Tegra234 support")
  Cc: [email protected]
  Signed-off-by: Wayne Chang <[email protected]>
  Reviewed-by: Jon Hunter <[email protected]>
  Tested-by: Jon Hunter <[email protected]>
  Link: https://lore.kernel.org/r/[email protected]
  Signed-off-by: Vinod Koul <[email protected]>

Signed-off-by: Desnes Nunes <[email protected]>

Author: Desnes Nunes

drivers/phy/tegra/xusb-tegra186.c

@@ -648,14 +648,15 @@ static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl)
 		udelay(100);
 	}
 
-	if (padctl->soc->trk_hw_mode) {
-		value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL2);
-		value |= USB2_TRK_HW_MODE;
+	value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL2);
+	if (padctl->soc->trk_update_on_idle)
 		value &= ~CYA_TRK_CODE_UPDATE_ON_IDLE;
-		padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL2);
-	} else {
+	if (padctl->soc->trk_hw_mode)
+		value |= USB2_TRK_HW_MODE;
+	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL2);
+
+	if (!padctl->soc->trk_hw_mode)
 		clk_disable_unprepare(priv->usb2_trk_clk);
-	}
 }
 
 static void tegra186_utmi_bias_pad_power_off(struct tegra_xusb_padctl *padctl)
@@ -1711,6 +1712,7 @@ const struct tegra_xusb_padctl_soc tegra234_xusb_padctl_soc = {
 	.supports_gen2 = true,
 	.poll_trk_completed = true,
 	.trk_hw_mode = true,
+	.trk_update_on_idle = true,
 	.supports_lp_cfg_en = true,
 };
 EXPORT_SYMBOL_GPL(tegra234_xusb_padctl_soc);

drivers/phy/tegra/xusb.h

@@ -434,6 +434,7 @@ struct tegra_xusb_padctl_soc {
 	bool need_fake_usb3_port;
 	bool poll_trk_completed;
 	bool trk_hw_mode;
+	bool trk_update_on_idle;
 	bool supports_lp_cfg_en;
 };