Re: [PATCH v2 6/6] phy: tegra: xusb: Move T186 .set_mode() to common implementation

[Jon Hunter <jonathanh@nvidia.com>]

On 24/03/2026 14:36, Diogo Ivo wrote:

...

> Ok, I can make it common there as well. However I still feel like
> reverting cefc1caee9dd leads to cleaner code since vbus_override() and
> id_override() will look similar and only do exactly what they state in
> their names and the overall logic looks cleaner.

Just so you know that while commit cefc1caee9dd was being prepared for
upstream submission, the following had been proposed for this ...

@@ -825,11 +826,11 @@ static int tegra186_utmi_phy_set_mode(struct phy *phy, enum phy_mode mode,
  			tegra186_xusb_padctl_vbus_override(padctl, true);
  		} else if (submode == USB_ROLE_NONE) {
  			/*
-			 * When port is peripheral only or role transitions to
-			 * USB_ROLE_NONE from USB_ROLE_DEVICE, regulator is not
-			 * enabled.
+			 * The regulator is disabled only when the role transitions
+			 * from USB_ROLE_HOST to USB_ROLE_NONE.
  			 */
-			if (regulator_is_enabled(port->supply))
+			value = padctl_readl(padctl, USB2_VBUS_ID);
+			if (!(value & ID_OVERRIDE_FLOATING))
  				regulator_disable(port->supply);

This shows the relationship between ID override and the regulator and
hence it was moved into id_override(). This is different to your fix
in patch 5/6. So given that we have been using cefc1caee9dd now for
sometime, I don't wish to change the implementation unless there is a
valid reason.

Jon

-- 
nvpublic