usb: add devicetree helpers for determining dr_mode and phy_type (1c9af653) · Commits · 戴 / test

drivers/usb/phy/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,7 @@
		ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG

		obj-$(CONFIG_USB_PHY) += phy.o
		obj-$(CONFIG_OF) += of.o

		# transceiver drivers, keep the list sorted

0 → 100644

+47 −0

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		/*
		* USB of helper code
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/usb/of.h>
		#include <linux/usb/otg.h>

		static const char *const usbphy_modes[] = {
		[USBPHY_INTERFACE_MODE_UNKNOWN] = "",
		[USBPHY_INTERFACE_MODE_UTMI] = "utmi",
		[USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
		[USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
		[USBPHY_INTERFACE_MODE_SERIAL] = "serial",
		[USBPHY_INTERFACE_MODE_HSIC] = "hsic",
		};

		/**
		* of_usb_get_phy_mode - Get phy mode for given device_node
		* @np: Pointer to the given device_node
		*
		* The function gets phy interface string from property 'phy_type',
		* and returns the correspondig enum usb_phy_interface
		*/
		enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
		{
		const char *phy_type;
		int err, i;

		err = of_property_read_string(np, "phy_type", &phy_type);
		if (err < 0)
		return USBPHY_INTERFACE_MODE_UNKNOWN;

		for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
		if (!strcmp(phy_type, usbphy_modes[i]))
		return i;

		return USBPHY_INTERFACE_MODE_UNKNOWN;
		}
		EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);

+35 −0

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		@@ -13,7 +13,9 @@

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/usb/ch9.h>
		#include <linux/usb/of.h>
		#include <linux/usb/otg.h>

		const char *usb_otg_state_string(enum usb_otg_state state)
		@@ -79,4 +81,37 @@ const char *usb_state_string(enum usb_device_state state)
		}
		EXPORT_SYMBOL_GPL(usb_state_string);

		#ifdef CONFIG_OF
		static const char *const usb_dr_modes[] = {
		[USB_DR_MODE_UNKNOWN] = "",
		[USB_DR_MODE_HOST] = "host",
		[USB_DR_MODE_PERIPHERAL] = "peripheral",
		[USB_DR_MODE_OTG] = "otg",
		};

		/**
		* of_usb_get_dr_mode - Get dual role mode for given device_node
		* @np: Pointer to the given device_node
		*
		* The function gets phy interface string from property 'dr_mode',
		* and returns the correspondig enum usb_dr_mode
		*/
		enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
		{
		const char *dr_mode;
		int err, i;

		err = of_property_read_string(np, "dr_mode", &dr_mode);
		if (err < 0)
		return USB_DR_MODE_UNKNOWN;

		for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
		if (!strcmp(dr_mode, usb_dr_modes[i]))
		return i;

		return USB_DR_MODE_UNKNOWN;
		}
		EXPORT_SYMBOL_GPL(of_usb_get_dr_mode);
		#endif

		MODULE_LICENSE("GPL");

0 → 100644

+28 −0

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		/*
		* OF helpers for usb devices.
		*
		* This file is released under the GPLv2
		*/

		#ifndef __LINUX_USB_OF_H
		#define __LINUX_USB_OF_H

		#include <linux/usb/otg.h>
		#include <linux/usb/phy.h>

		#ifdef CONFIG_OF
		enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np);
		enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np);
		#else
		static inline enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
		{
		return USBPHY_INTERFACE_MODE_UNKNOWN;
		}

		static inline enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
		{
		return USB_DR_MODE_UNKNOWN;
		}
		#endif

		#endif /* __LINUX_USB_OF_H */

+7 −0

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		@@ -92,4 +92,11 @@ otg_start_srp(struct usb_otg *otg)
		/* for OTG controller drivers (and maybe other stuff) */
		extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num);

		enum usb_dr_mode {
		USB_DR_MODE_UNKNOWN,
		USB_DR_MODE_HOST,
		USB_DR_MODE_PERIPHERAL,
		USB_DR_MODE_OTG,
		};

		#endif /* __LINUX_USB_OTG_H */