15fd54aceSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0+
21c9af653SMichael Grzeschik /*
31c9af653SMichael Grzeschik * USB of helper code
41c9af653SMichael Grzeschik */
51c9af653SMichael Grzeschik
61c9af653SMichael Grzeschik #include <linux/kernel.h>
71c9af653SMichael Grzeschik #include <linux/module.h>
81c9af653SMichael Grzeschik #include <linux/of.h>
91c9af653SMichael Grzeschik #include <linux/usb/of.h>
101c9af653SMichael Grzeschik #include <linux/usb/otg.h>
111c9af653SMichael Grzeschik
121c9af653SMichael Grzeschik static const char *const usbphy_modes[] = {
131c9af653SMichael Grzeschik [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
141c9af653SMichael Grzeschik [USBPHY_INTERFACE_MODE_UTMI] = "utmi",
151c9af653SMichael Grzeschik [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
161c9af653SMichael Grzeschik [USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
171c9af653SMichael Grzeschik [USBPHY_INTERFACE_MODE_SERIAL] = "serial",
181c9af653SMichael Grzeschik [USBPHY_INTERFACE_MODE_HSIC] = "hsic",
191c9af653SMichael Grzeschik };
201c9af653SMichael Grzeschik
211c9af653SMichael Grzeschik /**
221c9af653SMichael Grzeschik * of_usb_get_phy_mode - Get phy mode for given device_node
231c9af653SMichael Grzeschik * @np: Pointer to the given device_node
241c9af653SMichael Grzeschik *
251c9af653SMichael Grzeschik * The function gets phy interface string from property 'phy_type',
26656e7c36SMickael Maison * and returns the corresponding enum usb_phy_interface
271c9af653SMichael Grzeschik */
of_usb_get_phy_mode(struct device_node * np)281c9af653SMichael Grzeschik enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
291c9af653SMichael Grzeschik {
301c9af653SMichael Grzeschik const char *phy_type;
311c9af653SMichael Grzeschik int err, i;
321c9af653SMichael Grzeschik
331c9af653SMichael Grzeschik err = of_property_read_string(np, "phy_type", &phy_type);
341c9af653SMichael Grzeschik if (err < 0)
351c9af653SMichael Grzeschik return USBPHY_INTERFACE_MODE_UNKNOWN;
361c9af653SMichael Grzeschik
371c9af653SMichael Grzeschik for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
381c9af653SMichael Grzeschik if (!strcmp(phy_type, usbphy_modes[i]))
391c9af653SMichael Grzeschik return i;
401c9af653SMichael Grzeschik
411c9af653SMichael Grzeschik return USBPHY_INTERFACE_MODE_UNKNOWN;
421c9af653SMichael Grzeschik }
431c9af653SMichael Grzeschik EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);
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