[nrf fromtree] drivers: usb: dwc2: nrf: Set PHY.CONFIG value

Generate PHY.CONFIG based on devicetree and assign it before PHY
power-on reset is released.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>

(cherry picked from commit 21b3ac8)

Author: tmon-nordic

drivers/usb/common/nordic/nrf_usbhs_phy_config.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/** @cond INTERNAL_HIDDEN */
+
+#ifndef NRF_USBHS_PHY_CONFIG_H__
+#define NRF_USBHS_PHY_CONFIG_H__
+
+/* This macro works for both types, because differences between Type1 and Type2
+ * are covered by devicetree bindings having different enum values and defaults.
+ */
+#define PHY_CONFIG_VALUE(node)                                                                     \
+	(0 << USBHS_PHY_CONFIG_PLLITUNE_Pos)                                                      |\
+	(0xC << USBHS_PHY_CONFIG_PLLPTUNE_Pos)                                                    |\
+	(DT_ENUM_IDX(node, compdistune) << USBHS_PHY_CONFIG_COMPDISTUNE0_Pos)                     |\
+	(DT_ENUM_IDX(node, sqrxtune) << USBHS_PHY_CONFIG_SQRXTUNE0_Pos)                           |\
+	(DT_ENUM_IDX(node, vdatreftune) << USBHS_PHY_CONFIG_VDATREFTUNE0_Pos)                     |\
+	((1 + DT_ENUM_IDX(node, txhsxvtune)) << USBHS_PHY_CONFIG_TXHSXVTUNE0_Pos)                 |\
+	(BIT_MASK(DT_ENUM_IDX(node, txfslstune)) << USBHS_PHY_CONFIG_TXFSLSTUNE0_Pos)             |\
+	(DT_ENUM_IDX(node, txvreftune) << USBHS_PHY_CONFIG_TXVREFTUNE0_Pos)                       |\
+	(DT_ENUM_IDX(node, txrisetune) << USBHS_PHY_CONFIG_TXRISETUNE0_Pos)                       |\
+	(DT_ENUM_IDX(node, txrestune) << USBHS_PHY_CONFIG_TXRESTUNE0_Pos)                         |\
+	(DT_ENUM_IDX(node, txpreempamptune) << USBHS_PHY_CONFIG_TXPREEMPAMPTUNE0_Pos)             |\
+	(DT_ENUM_IDX(node, txpreemppulsetune) << USBHS_PHY_CONFIG_TXPREEMPPULSETUNE0_Pos)
+
+#define PHY_CONFIG(node)                                                                           \
+	COND_CASE_1(DT_NODE_HAS_COMPAT(node, nordic_nrf_usbhs_phy_type1), (PHY_CONFIG_VALUE(node)),\
+		    DT_NODE_HAS_COMPAT(node, nordic_nrf_usbhs_phy_type2), (PHY_CONFIG_VALUE(node)),\
+		    (ZERO_OR_COMPILE_ERROR(0)))
+
+#endif /* NRF_USBHS_PHY_CONFIG_H__ */
+
+/** @endcond */

drivers/usb/common/nordic/nrf_usbhs_wrapper.c

@@ -9,6 +9,7 @@
 #include <zephyr/device.h>
 #include <zephyr/devicetree.h>
 #include <zephyr/drivers/regulator.h>
+#include <nrf_usbhs_phy_config.h>
 #include <nrf_usbhs_wrapper.h>
 
 #include <zephyr/logging/log.h>
@@ -42,6 +43,7 @@ static const char *const bc12_state_str[] = {
 struct usbhs_wrapper_config {
 	NRF_USBHS_Type *base;
 	const struct device *vregusb_dev;
+	uint32_t phy_config;
 };
 
 struct nrf_usbhs_wrapper_data {
@@ -134,6 +136,9 @@ static void wrapper_enable_core_internal(const struct device *dev)
 	/* Power up peripheral */
 	wrapper->ENABLE = USBHS_ENABLE_CORE_Msk;
 
+	/* Set PHY strapping options */
+	wrapper->PHY.CONFIG = config->phy_config;
+
 	/* Set role to Device, force D+ pull-up off by overriding VBUS valid signal */
 	wrapper->PHY.OVERRIDEVALUES = USBHS_PHY_OVERRIDEVALUES_ID_Msk;
 	wrapper->PHY.INPUTOVERRIDE = USBHS_PHY_INPUTOVERRIDE_ID_Msk |
@@ -483,6 +488,7 @@ static int usbhs_wrapper_init(const struct device *dev)
 	static const struct usbhs_wrapper_config usbhs_wrapper_config_##n = {	\
 		.base = (void *)(DT_INST_REG_ADDR(n)),				\
 		.vregusb_dev = DEVICE_DT_GET(DT_INST_PHANDLE(n, regulator)),	\
+		.phy_config = PHY_CONFIG(DT_INST_PHANDLE(n, phy)),		\
 	};									\
 										\
 	static struct nrf_usbhs_wrapper_data usbhs_wrapper_data_##n;		\

drivers/usb/udc/udc_dwc2_nrf_usbhs.h

@@ -9,6 +9,7 @@
 #include <zephyr/logging/log.h>
 #include <nrfs_backend_ipc_service.h>
 #include <nrfs_usb.h>
+#include "../common/nordic/nrf_usbhs_phy_config.h"
 
 #define USBHS_DT_WRAPPER_REG_ADDR(n) UINT_TO_POINTER(DT_INST_REG_ADDR_BY_NAME(n, wrapper))
 
@@ -22,6 +23,8 @@
 static K_EVENT_DEFINE(usbhs_events);
 #define USBHS_VBUS_READY	BIT(0)
 
+const static uint32_t phy_config = PHY_CONFIG(DT_INST_PROP(0, phy));
+
 static void usbhs_vbus_handler(nrfs_usb_evt_t const *p_evt, void *const context)
 {
 	LOG_MODULE_DECLARE(udc_dwc2, CONFIG_UDC_DRIVER_LOG_LEVEL);
@@ -96,6 +99,13 @@ static inline int usbhs_enable_core(const struct device *dev)
 		}
 	}
 
+	/* Power up peripheral */
+	wrapper->ENABLE = USBHS_ENABLE_CORE_Msk;
+
+	/* Set PHY strapping options */
+	wrapper->PHY.CONFIG = phy_config;
+
+	/* Release PHY power-on reset */
 	wrapper->ENABLE = USBHS_ENABLE_PHY_Msk | USBHS_ENABLE_CORE_Msk;
 
 	/* Wait for PHY clock to start */