phy: exynos5-usbdrd: support isolating HS and SS ports independently

Some versions of this IP have been integrated using separate PMU power
control registers for the HS and SS parts. One example is the Google
Tensor gs101 SoC.

Such SoCs can now set pmu_offset_usbdrd0_phy_ss in their
exynos5_usbdrd_phy_drvdata for the SS phy to the appropriate value.

The existing 'usbdrdphy' alias can not be used in this case because
that is meant for determining the correct PMU offset if multiple
distinct PHYs exist in the system (as opposed to one PHY with multiple
isolators).
Signed-off-by: André Draszik <andre.draszik@linaro.org>
Tested-by: Will McVicker <willmcvicker@google.com>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Tested-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20240617-usb-phy-gs101-v3-2-b66de9ae7424@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/samsung/phy-exynos5-usbdrd.c

@@ -186,6 +186,7 @@ struct exynos5_usbdrd_phy_drvdata {
 	const struct exynos5_usbdrd_phy_config *phy_cfg;
 	const struct phy_ops *phy_ops;
 	u32 pmu_offset_usbdrd0_phy;
+	u32 pmu_offset_usbdrd0_phy_ss;
 	u32 pmu_offset_usbdrd1_phy;
 	bool has_common_clk_gate;
 };
@@ -1065,16 +1066,6 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev)
 	if (channel < 0)
 		dev_dbg(dev, "Not a multi-controller usbdrd phy\n");
 
-	switch (channel) {
-	case 1:
-		pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd1_phy;
-		break;
-	case 0:
-	default:
-		pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd0_phy;
-		break;
-	}
-
 	/* Get Vbus regulators */
 	phy_drd->vbus = devm_regulator_get(dev, "vbus");
 	if (IS_ERR(phy_drd->vbus)) {
@@ -1109,6 +1100,18 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev)
 		phy_drd->phys[i].phy = phy;
 		phy_drd->phys[i].index = i;
 		phy_drd->phys[i].reg_pmu = reg_pmu;
+		switch (channel) {
+		case 1:
+			pmu_offset = drv_data->pmu_offset_usbdrd1_phy;
+			break;
+		case 0:
+		default:
+			pmu_offset = drv_data->pmu_offset_usbdrd0_phy;
+			if (i == EXYNOS5_DRDPHY_PIPE3 && drv_data
+						->pmu_offset_usbdrd0_phy_ss)
+				pmu_offset = drv_data->pmu_offset_usbdrd0_phy_ss;
+			break;
+		}
 		phy_drd->phys[i].pmu_offset = pmu_offset;
 		phy_drd->phys[i].phy_cfg = &drv_data->phy_cfg[i];
 		phy_set_drvdata(phy, &phy_drd->phys[i]);