15fd54aceSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0+ 2cedf8602SSascha Hauer /* 3cedf8602SSascha Hauer * phy.c -- USB phy handling 4cedf8602SSascha Hauer * 5cedf8602SSascha Hauer * Copyright (C) 2004-2013 Texas Instruments 6cedf8602SSascha Hauer */ 7cedf8602SSascha Hauer #include <linux/kernel.h> 8cedf8602SSascha Hauer #include <linux/export.h> 9cedf8602SSascha Hauer #include <linux/err.h> 10cedf8602SSascha Hauer #include <linux/device.h> 11cedf8602SSascha Hauer #include <linux/module.h> 12cedf8602SSascha Hauer #include <linux/slab.h> 13cedf8602SSascha Hauer #include <linux/of.h> 14cedf8602SSascha Hauer 15cedf8602SSascha Hauer #include <linux/usb/phy.h> 16cedf8602SSascha Hauer 17a9081a00SBaolin Wang /* Default current range by charger type. */ 18a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MIN 2 19a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MAX 500 20a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MIN_SS 150 21a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MAX_SS 900 22a9081a00SBaolin Wang #define DEFAULT_DCP_CUR_MIN 500 23a9081a00SBaolin Wang #define DEFAULT_DCP_CUR_MAX 5000 24a9081a00SBaolin Wang #define DEFAULT_CDP_CUR_MIN 1500 25a9081a00SBaolin Wang #define DEFAULT_CDP_CUR_MAX 5000 26a9081a00SBaolin Wang #define DEFAULT_ACA_CUR_MIN 1500 27a9081a00SBaolin Wang #define DEFAULT_ACA_CUR_MAX 5000 28a9081a00SBaolin Wang 29cedf8602SSascha Hauer static LIST_HEAD(phy_list); 30cedf8602SSascha Hauer static DEFINE_SPINLOCK(phy_lock); 31cedf8602SSascha Hauer 32e842b84cSNeilBrown struct phy_devm { 33e842b84cSNeilBrown struct usb_phy *phy; 34e842b84cSNeilBrown struct notifier_block *nb; 35e842b84cSNeilBrown }; 36e842b84cSNeilBrown 373bdcfe6cSPeter Chen static const char *const usb_chger_type[] = { 383bdcfe6cSPeter Chen [UNKNOWN_TYPE] = "USB_CHARGER_UNKNOWN_TYPE", 393bdcfe6cSPeter Chen [SDP_TYPE] = "USB_CHARGER_SDP_TYPE", 403bdcfe6cSPeter Chen [CDP_TYPE] = "USB_CHARGER_CDP_TYPE", 413bdcfe6cSPeter Chen [DCP_TYPE] = "USB_CHARGER_DCP_TYPE", 423bdcfe6cSPeter Chen [ACA_TYPE] = "USB_CHARGER_ACA_TYPE", 433bdcfe6cSPeter Chen }; 443bdcfe6cSPeter Chen 45*a8534cb0SGrzegorz Jaszczyk static const char *const usb_chger_state[] = { 46*a8534cb0SGrzegorz Jaszczyk [USB_CHARGER_DEFAULT] = "USB_CHARGER_DEFAULT", 47*a8534cb0SGrzegorz Jaszczyk [USB_CHARGER_PRESENT] = "USB_CHARGER_PRESENT", 48*a8534cb0SGrzegorz Jaszczyk [USB_CHARGER_ABSENT] = "USB_CHARGER_ABSENT", 49*a8534cb0SGrzegorz Jaszczyk }; 50*a8534cb0SGrzegorz Jaszczyk 51cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy(struct list_head *list, 52cedf8602SSascha Hauer enum usb_phy_type type) 53cedf8602SSascha Hauer { 54cedf8602SSascha Hauer struct usb_phy *phy = NULL; 55cedf8602SSascha Hauer 56cedf8602SSascha Hauer list_for_each_entry(phy, list, head) { 57cedf8602SSascha Hauer if (phy->type != type) 58cedf8602SSascha Hauer continue; 59cedf8602SSascha Hauer 60cedf8602SSascha Hauer return phy; 61cedf8602SSascha Hauer } 62cedf8602SSascha Hauer 630df8fc37SHeikki Krogerus return ERR_PTR(-ENODEV); 64cedf8602SSascha Hauer } 65cedf8602SSascha Hauer 66cedf8602SSascha Hauer static struct usb_phy *__of_usb_find_phy(struct device_node *node) 67cedf8602SSascha Hauer { 68cedf8602SSascha Hauer struct usb_phy *phy; 69cedf8602SSascha Hauer 70c818a94cSThierry Reding if (!of_device_is_available(node)) 71c818a94cSThierry Reding return ERR_PTR(-ENODEV); 72c818a94cSThierry Reding 73cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 74cedf8602SSascha Hauer if (node != phy->dev->of_node) 75cedf8602SSascha Hauer continue; 76cedf8602SSascha Hauer 77cedf8602SSascha Hauer return phy; 78cedf8602SSascha Hauer } 79cedf8602SSascha Hauer 809c9d8249SMaxime Ripard return ERR_PTR(-EPROBE_DEFER); 81cedf8602SSascha Hauer } 82cedf8602SSascha Hauer 83*a8534cb0SGrzegorz Jaszczyk static struct usb_phy *__device_to_usb_phy(struct device *dev) 84*a8534cb0SGrzegorz Jaszczyk { 85*a8534cb0SGrzegorz Jaszczyk struct usb_phy *usb_phy; 86*a8534cb0SGrzegorz Jaszczyk 87*a8534cb0SGrzegorz Jaszczyk list_for_each_entry(usb_phy, &phy_list, head) { 88*a8534cb0SGrzegorz Jaszczyk if (usb_phy->dev == dev) 89*a8534cb0SGrzegorz Jaszczyk break; 90*a8534cb0SGrzegorz Jaszczyk } 91*a8534cb0SGrzegorz Jaszczyk 92*a8534cb0SGrzegorz Jaszczyk return usb_phy; 93*a8534cb0SGrzegorz Jaszczyk } 94*a8534cb0SGrzegorz Jaszczyk 95a9081a00SBaolin Wang static void usb_phy_set_default_current(struct usb_phy *usb_phy) 96a9081a00SBaolin Wang { 97a9081a00SBaolin Wang usb_phy->chg_cur.sdp_min = DEFAULT_SDP_CUR_MIN; 98a9081a00SBaolin Wang usb_phy->chg_cur.sdp_max = DEFAULT_SDP_CUR_MAX; 99a9081a00SBaolin Wang usb_phy->chg_cur.dcp_min = DEFAULT_DCP_CUR_MIN; 100a9081a00SBaolin Wang usb_phy->chg_cur.dcp_max = DEFAULT_DCP_CUR_MAX; 101a9081a00SBaolin Wang usb_phy->chg_cur.cdp_min = DEFAULT_CDP_CUR_MIN; 102a9081a00SBaolin Wang usb_phy->chg_cur.cdp_max = DEFAULT_CDP_CUR_MAX; 103a9081a00SBaolin Wang usb_phy->chg_cur.aca_min = DEFAULT_ACA_CUR_MIN; 104a9081a00SBaolin Wang usb_phy->chg_cur.aca_max = DEFAULT_ACA_CUR_MAX; 105a9081a00SBaolin Wang } 106a9081a00SBaolin Wang 107a9081a00SBaolin Wang /** 108a9081a00SBaolin Wang * usb_phy_notify_charger_work - notify the USB charger state 109529427b9SLee Jones * @work: the charger work to notify the USB charger state 110a9081a00SBaolin Wang * 111a9081a00SBaolin Wang * This work can be issued when USB charger state has been changed or 112a9081a00SBaolin Wang * USB charger current has been changed, then we can notify the current 113a9081a00SBaolin Wang * what can be drawn to power user and the charger state to userspace. 114a9081a00SBaolin Wang * 115a9081a00SBaolin Wang * If we get the charger type from extcon subsystem, we can notify the 116a9081a00SBaolin Wang * charger state to power user automatically by usb_phy_get_charger_type() 117a9081a00SBaolin Wang * issuing from extcon subsystem. 118a9081a00SBaolin Wang * 119a9081a00SBaolin Wang * If we get the charger type from ->charger_detect() instead of extcon 120a9081a00SBaolin Wang * subsystem, the usb phy driver should issue usb_phy_set_charger_state() 121a9081a00SBaolin Wang * to set charger state when the charger state has been changed. 122a9081a00SBaolin Wang */ 123a9081a00SBaolin Wang static void usb_phy_notify_charger_work(struct work_struct *work) 124a9081a00SBaolin Wang { 125a9081a00SBaolin Wang struct usb_phy *usb_phy = container_of(work, struct usb_phy, chg_work); 126a9081a00SBaolin Wang unsigned int min, max; 127a9081a00SBaolin Wang 128a9081a00SBaolin Wang switch (usb_phy->chg_state) { 129a9081a00SBaolin Wang case USB_CHARGER_PRESENT: 130a9081a00SBaolin Wang usb_phy_get_charger_current(usb_phy, &min, &max); 131a9081a00SBaolin Wang 132a9081a00SBaolin Wang atomic_notifier_call_chain(&usb_phy->notifier, max, usb_phy); 133a9081a00SBaolin Wang break; 134a9081a00SBaolin Wang case USB_CHARGER_ABSENT: 135a9081a00SBaolin Wang usb_phy_set_default_current(usb_phy); 136a9081a00SBaolin Wang 137a9081a00SBaolin Wang atomic_notifier_call_chain(&usb_phy->notifier, 0, usb_phy); 138a9081a00SBaolin Wang break; 139a9081a00SBaolin Wang default: 140a9081a00SBaolin Wang dev_warn(usb_phy->dev, "Unknown USB charger state: %d\n", 141a9081a00SBaolin Wang usb_phy->chg_state); 142a9081a00SBaolin Wang return; 143a9081a00SBaolin Wang } 144a9081a00SBaolin Wang 145*a8534cb0SGrzegorz Jaszczyk kobject_uevent(&usb_phy->dev->kobj, KOBJ_CHANGE); 146*a8534cb0SGrzegorz Jaszczyk } 147*a8534cb0SGrzegorz Jaszczyk 148*a8534cb0SGrzegorz Jaszczyk static int usb_phy_uevent(struct device *dev, struct kobj_uevent_env *env) 149*a8534cb0SGrzegorz Jaszczyk { 150*a8534cb0SGrzegorz Jaszczyk struct usb_phy *usb_phy; 151*a8534cb0SGrzegorz Jaszczyk char uchger_state[50] = { 0 }; 152*a8534cb0SGrzegorz Jaszczyk char uchger_type[50] = { 0 }; 153*a8534cb0SGrzegorz Jaszczyk 154*a8534cb0SGrzegorz Jaszczyk usb_phy = __device_to_usb_phy(dev); 155*a8534cb0SGrzegorz Jaszczyk 156*a8534cb0SGrzegorz Jaszczyk snprintf(uchger_state, ARRAY_SIZE(uchger_state), 157*a8534cb0SGrzegorz Jaszczyk "USB_CHARGER_STATE=%s", usb_chger_state[usb_phy->chg_state]); 158*a8534cb0SGrzegorz Jaszczyk 1593bdcfe6cSPeter Chen snprintf(uchger_type, ARRAY_SIZE(uchger_type), 1603bdcfe6cSPeter Chen "USB_CHARGER_TYPE=%s", usb_chger_type[usb_phy->chg_type]); 161*a8534cb0SGrzegorz Jaszczyk 162*a8534cb0SGrzegorz Jaszczyk if (add_uevent_var(env, uchger_state)) 163*a8534cb0SGrzegorz Jaszczyk return -ENOMEM; 164*a8534cb0SGrzegorz Jaszczyk 165*a8534cb0SGrzegorz Jaszczyk if (add_uevent_var(env, uchger_type)) 166*a8534cb0SGrzegorz Jaszczyk return -ENOMEM; 167*a8534cb0SGrzegorz Jaszczyk 168*a8534cb0SGrzegorz Jaszczyk return 0; 169a9081a00SBaolin Wang } 170a9081a00SBaolin Wang 171a9081a00SBaolin Wang static void __usb_phy_get_charger_type(struct usb_phy *usb_phy) 172a9081a00SBaolin Wang { 173a9081a00SBaolin Wang if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_SDP) > 0) { 174a9081a00SBaolin Wang usb_phy->chg_type = SDP_TYPE; 175a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 176a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_CDP) > 0) { 177a9081a00SBaolin Wang usb_phy->chg_type = CDP_TYPE; 178a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 179a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_DCP) > 0) { 180a9081a00SBaolin Wang usb_phy->chg_type = DCP_TYPE; 181a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 182a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_ACA) > 0) { 183a9081a00SBaolin Wang usb_phy->chg_type = ACA_TYPE; 184a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 185a9081a00SBaolin Wang } else { 186a9081a00SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 187a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_ABSENT; 188a9081a00SBaolin Wang } 189a9081a00SBaolin Wang 190a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 191a9081a00SBaolin Wang } 192a9081a00SBaolin Wang 193a9081a00SBaolin Wang /** 194a9081a00SBaolin Wang * usb_phy_get_charger_type - get charger type from extcon subsystem 195529427b9SLee Jones * @nb: the notifier block to determine charger type 196529427b9SLee Jones * @state: the cable state 197529427b9SLee Jones * @data: private data 198a9081a00SBaolin Wang * 199a9081a00SBaolin Wang * Determin the charger type from extcon subsystem which also means the 200a9081a00SBaolin Wang * charger state has been chaned, then we should notify this event. 201a9081a00SBaolin Wang */ 202a9081a00SBaolin Wang static int usb_phy_get_charger_type(struct notifier_block *nb, 203a9081a00SBaolin Wang unsigned long state, void *data) 204a9081a00SBaolin Wang { 205a9081a00SBaolin Wang struct usb_phy *usb_phy = container_of(nb, struct usb_phy, type_nb); 206a9081a00SBaolin Wang 207a9081a00SBaolin Wang __usb_phy_get_charger_type(usb_phy); 208a9081a00SBaolin Wang return NOTIFY_OK; 209a9081a00SBaolin Wang } 210a9081a00SBaolin Wang 211a9081a00SBaolin Wang /** 212a9081a00SBaolin Wang * usb_phy_set_charger_current - set the USB charger current 213529427b9SLee Jones * @usb_phy: the USB phy to be used 214529427b9SLee Jones * @mA: the current need to be set 215a9081a00SBaolin Wang * 216a9081a00SBaolin Wang * Usually we only change the charger default current when USB finished the 217a9081a00SBaolin Wang * enumeration as one SDP charger. As one SDP charger, usb_phy_set_power() 218a9081a00SBaolin Wang * will issue this function to change charger current when after setting USB 219a9081a00SBaolin Wang * configuration, or suspend/resume USB. For other type charger, we should 220a9081a00SBaolin Wang * use the default charger current and we do not suggest to issue this function 221a9081a00SBaolin Wang * to change the charger current. 222a9081a00SBaolin Wang * 223a9081a00SBaolin Wang * When USB charger current has been changed, we need to notify the power users. 224a9081a00SBaolin Wang */ 225a9081a00SBaolin Wang void usb_phy_set_charger_current(struct usb_phy *usb_phy, unsigned int mA) 226a9081a00SBaolin Wang { 227a9081a00SBaolin Wang switch (usb_phy->chg_type) { 228a9081a00SBaolin Wang case SDP_TYPE: 229a9081a00SBaolin Wang if (usb_phy->chg_cur.sdp_max == mA) 230a9081a00SBaolin Wang return; 231a9081a00SBaolin Wang 232a9081a00SBaolin Wang usb_phy->chg_cur.sdp_max = (mA > DEFAULT_SDP_CUR_MAX_SS) ? 233a9081a00SBaolin Wang DEFAULT_SDP_CUR_MAX_SS : mA; 234a9081a00SBaolin Wang break; 235a9081a00SBaolin Wang case DCP_TYPE: 236a9081a00SBaolin Wang if (usb_phy->chg_cur.dcp_max == mA) 237a9081a00SBaolin Wang return; 238a9081a00SBaolin Wang 239a9081a00SBaolin Wang usb_phy->chg_cur.dcp_max = (mA > DEFAULT_DCP_CUR_MAX) ? 240a9081a00SBaolin Wang DEFAULT_DCP_CUR_MAX : mA; 241a9081a00SBaolin Wang break; 242a9081a00SBaolin Wang case CDP_TYPE: 243a9081a00SBaolin Wang if (usb_phy->chg_cur.cdp_max == mA) 244a9081a00SBaolin Wang return; 245a9081a00SBaolin Wang 246a9081a00SBaolin Wang usb_phy->chg_cur.cdp_max = (mA > DEFAULT_CDP_CUR_MAX) ? 247a9081a00SBaolin Wang DEFAULT_CDP_CUR_MAX : mA; 248a9081a00SBaolin Wang break; 249a9081a00SBaolin Wang case ACA_TYPE: 250a9081a00SBaolin Wang if (usb_phy->chg_cur.aca_max == mA) 251a9081a00SBaolin Wang return; 252a9081a00SBaolin Wang 253a9081a00SBaolin Wang usb_phy->chg_cur.aca_max = (mA > DEFAULT_ACA_CUR_MAX) ? 254a9081a00SBaolin Wang DEFAULT_ACA_CUR_MAX : mA; 255a9081a00SBaolin Wang break; 256a9081a00SBaolin Wang default: 257a9081a00SBaolin Wang return; 258a9081a00SBaolin Wang } 259a9081a00SBaolin Wang 260a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 261a9081a00SBaolin Wang } 262a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_set_charger_current); 263a9081a00SBaolin Wang 264a9081a00SBaolin Wang /** 265a9081a00SBaolin Wang * usb_phy_get_charger_current - get the USB charger current 266529427b9SLee Jones * @usb_phy: the USB phy to be used 267529427b9SLee Jones * @min: the minimum current 268529427b9SLee Jones * @max: the maximum current 269a9081a00SBaolin Wang * 270a9081a00SBaolin Wang * Usually we will notify the maximum current to power user, but for some 271a9081a00SBaolin Wang * special case, power user also need the minimum current value. Then the 272a9081a00SBaolin Wang * power user can issue this function to get the suitable current. 273a9081a00SBaolin Wang */ 274a9081a00SBaolin Wang void usb_phy_get_charger_current(struct usb_phy *usb_phy, 275a9081a00SBaolin Wang unsigned int *min, unsigned int *max) 276a9081a00SBaolin Wang { 277a9081a00SBaolin Wang switch (usb_phy->chg_type) { 278a9081a00SBaolin Wang case SDP_TYPE: 279a9081a00SBaolin Wang *min = usb_phy->chg_cur.sdp_min; 280a9081a00SBaolin Wang *max = usb_phy->chg_cur.sdp_max; 281a9081a00SBaolin Wang break; 282a9081a00SBaolin Wang case DCP_TYPE: 283a9081a00SBaolin Wang *min = usb_phy->chg_cur.dcp_min; 284a9081a00SBaolin Wang *max = usb_phy->chg_cur.dcp_max; 285a9081a00SBaolin Wang break; 286a9081a00SBaolin Wang case CDP_TYPE: 287a9081a00SBaolin Wang *min = usb_phy->chg_cur.cdp_min; 288a9081a00SBaolin Wang *max = usb_phy->chg_cur.cdp_max; 289a9081a00SBaolin Wang break; 290a9081a00SBaolin Wang case ACA_TYPE: 291a9081a00SBaolin Wang *min = usb_phy->chg_cur.aca_min; 292a9081a00SBaolin Wang *max = usb_phy->chg_cur.aca_max; 293a9081a00SBaolin Wang break; 294a9081a00SBaolin Wang default: 295a9081a00SBaolin Wang *min = 0; 296a9081a00SBaolin Wang *max = 0; 297a9081a00SBaolin Wang break; 298a9081a00SBaolin Wang } 299a9081a00SBaolin Wang } 300a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_get_charger_current); 301a9081a00SBaolin Wang 302a9081a00SBaolin Wang /** 303a9081a00SBaolin Wang * usb_phy_set_charger_state - set the USB charger state 304529427b9SLee Jones * @usb_phy: the USB phy to be used 305529427b9SLee Jones * @state: the new state need to be set for charger 306a9081a00SBaolin Wang * 307a9081a00SBaolin Wang * The usb phy driver can issue this function when the usb phy driver 308a9081a00SBaolin Wang * detected the charger state has been changed, in this case the charger 309a9081a00SBaolin Wang * type should be get from ->charger_detect(). 310a9081a00SBaolin Wang */ 311a9081a00SBaolin Wang void usb_phy_set_charger_state(struct usb_phy *usb_phy, 312a9081a00SBaolin Wang enum usb_charger_state state) 313a9081a00SBaolin Wang { 314a9081a00SBaolin Wang if (usb_phy->chg_state == state || !usb_phy->charger_detect) 315a9081a00SBaolin Wang return; 316a9081a00SBaolin Wang 317a9081a00SBaolin Wang usb_phy->chg_state = state; 318a9081a00SBaolin Wang if (usb_phy->chg_state == USB_CHARGER_PRESENT) 319a9081a00SBaolin Wang usb_phy->chg_type = usb_phy->charger_detect(usb_phy); 320a9081a00SBaolin Wang else 321a9081a00SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 322a9081a00SBaolin Wang 323a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 324a9081a00SBaolin Wang } 325a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_set_charger_state); 326a9081a00SBaolin Wang 327cedf8602SSascha Hauer static void devm_usb_phy_release(struct device *dev, void *res) 328cedf8602SSascha Hauer { 329cedf8602SSascha Hauer struct usb_phy *phy = *(struct usb_phy **)res; 330cedf8602SSascha Hauer 331cedf8602SSascha Hauer usb_put_phy(phy); 332cedf8602SSascha Hauer } 333cedf8602SSascha Hauer 334e842b84cSNeilBrown static void devm_usb_phy_release2(struct device *dev, void *_res) 335e842b84cSNeilBrown { 336e842b84cSNeilBrown struct phy_devm *res = _res; 337e842b84cSNeilBrown 338e842b84cSNeilBrown if (res->nb) 339e842b84cSNeilBrown usb_unregister_notifier(res->phy, res->nb); 340e842b84cSNeilBrown usb_put_phy(res->phy); 341e842b84cSNeilBrown } 342e842b84cSNeilBrown 343cedf8602SSascha Hauer static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) 344cedf8602SSascha Hauer { 345869aee0fSAxel Lin struct usb_phy **phy = res; 346869aee0fSAxel Lin 347869aee0fSAxel Lin return *phy == match_data; 348cedf8602SSascha Hauer } 349cedf8602SSascha Hauer 350655283a7SBaolin Wang static void usb_charger_init(struct usb_phy *usb_phy) 351655283a7SBaolin Wang { 352655283a7SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 353655283a7SBaolin Wang usb_phy->chg_state = USB_CHARGER_DEFAULT; 354655283a7SBaolin Wang usb_phy_set_default_current(usb_phy); 355655283a7SBaolin Wang INIT_WORK(&usb_phy->chg_work, usb_phy_notify_charger_work); 356655283a7SBaolin Wang } 357655283a7SBaolin Wang 3587d21114dSBaolin Wang static int usb_add_extcon(struct usb_phy *x) 3597d21114dSBaolin Wang { 3607d21114dSBaolin Wang int ret; 3617d21114dSBaolin Wang 3627d21114dSBaolin Wang if (of_property_read_bool(x->dev->of_node, "extcon")) { 3637d21114dSBaolin Wang x->edev = extcon_get_edev_by_phandle(x->dev, 0); 3647d21114dSBaolin Wang if (IS_ERR(x->edev)) 3657d21114dSBaolin Wang return PTR_ERR(x->edev); 3667d21114dSBaolin Wang 3677d21114dSBaolin Wang x->id_edev = extcon_get_edev_by_phandle(x->dev, 1); 3687d21114dSBaolin Wang if (IS_ERR(x->id_edev)) { 3697d21114dSBaolin Wang x->id_edev = NULL; 3707d21114dSBaolin Wang dev_info(x->dev, "No separate ID extcon device\n"); 3717d21114dSBaolin Wang } 3727d21114dSBaolin Wang 3737d21114dSBaolin Wang if (x->vbus_nb.notifier_call) { 3747d21114dSBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 3757d21114dSBaolin Wang EXTCON_USB, 3767d21114dSBaolin Wang &x->vbus_nb); 3777d21114dSBaolin Wang if (ret < 0) { 3787d21114dSBaolin Wang dev_err(x->dev, 3797d21114dSBaolin Wang "register VBUS notifier failed\n"); 3807d21114dSBaolin Wang return ret; 3817d21114dSBaolin Wang } 382a9081a00SBaolin Wang } else { 383a9081a00SBaolin Wang x->type_nb.notifier_call = usb_phy_get_charger_type; 384a9081a00SBaolin Wang 385a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 386a9081a00SBaolin Wang EXTCON_CHG_USB_SDP, 387a9081a00SBaolin Wang &x->type_nb); 388a9081a00SBaolin Wang if (ret) { 389a9081a00SBaolin Wang dev_err(x->dev, 390a9081a00SBaolin Wang "register extcon USB SDP failed.\n"); 391a9081a00SBaolin Wang return ret; 392a9081a00SBaolin Wang } 393a9081a00SBaolin Wang 394a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 395a9081a00SBaolin Wang EXTCON_CHG_USB_CDP, 396a9081a00SBaolin Wang &x->type_nb); 397a9081a00SBaolin Wang if (ret) { 398a9081a00SBaolin Wang dev_err(x->dev, 399a9081a00SBaolin Wang "register extcon USB CDP failed.\n"); 400a9081a00SBaolin Wang return ret; 401a9081a00SBaolin Wang } 402a9081a00SBaolin Wang 403a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 404a9081a00SBaolin Wang EXTCON_CHG_USB_DCP, 405a9081a00SBaolin Wang &x->type_nb); 406a9081a00SBaolin Wang if (ret) { 407a9081a00SBaolin Wang dev_err(x->dev, 408a9081a00SBaolin Wang "register extcon USB DCP failed.\n"); 409a9081a00SBaolin Wang return ret; 410a9081a00SBaolin Wang } 411a9081a00SBaolin Wang 412a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 413a9081a00SBaolin Wang EXTCON_CHG_USB_ACA, 414a9081a00SBaolin Wang &x->type_nb); 415a9081a00SBaolin Wang if (ret) { 416a9081a00SBaolin Wang dev_err(x->dev, 417a9081a00SBaolin Wang "register extcon USB ACA failed.\n"); 418a9081a00SBaolin Wang return ret; 419a9081a00SBaolin Wang } 4207d21114dSBaolin Wang } 4217d21114dSBaolin Wang 4227d21114dSBaolin Wang if (x->id_nb.notifier_call) { 4237d21114dSBaolin Wang struct extcon_dev *id_ext; 4247d21114dSBaolin Wang 4257d21114dSBaolin Wang if (x->id_edev) 4267d21114dSBaolin Wang id_ext = x->id_edev; 4277d21114dSBaolin Wang else 4287d21114dSBaolin Wang id_ext = x->edev; 4297d21114dSBaolin Wang 4307d21114dSBaolin Wang ret = devm_extcon_register_notifier(x->dev, id_ext, 4317d21114dSBaolin Wang EXTCON_USB_HOST, 4327d21114dSBaolin Wang &x->id_nb); 4337d21114dSBaolin Wang if (ret < 0) { 4347d21114dSBaolin Wang dev_err(x->dev, 4357d21114dSBaolin Wang "register ID notifier failed\n"); 4367d21114dSBaolin Wang return ret; 4377d21114dSBaolin Wang } 4387d21114dSBaolin Wang } 4397d21114dSBaolin Wang } 4407d21114dSBaolin Wang 441a9081a00SBaolin Wang if (x->type_nb.notifier_call) 442a9081a00SBaolin Wang __usb_phy_get_charger_type(x); 443a9081a00SBaolin Wang 4447d21114dSBaolin Wang return 0; 4457d21114dSBaolin Wang } 4467d21114dSBaolin Wang 447cedf8602SSascha Hauer /** 448cedf8602SSascha Hauer * devm_usb_get_phy - find the USB PHY 449529427b9SLee Jones * @dev: device that requests this phy 450529427b9SLee Jones * @type: the type of the phy the controller requires 451cedf8602SSascha Hauer * 452cedf8602SSascha Hauer * Gets the phy using usb_get_phy(), and associates a device with it using 453cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 454cedf8602SSascha Hauer * then, devres data is freed. 455cedf8602SSascha Hauer * 456cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 457cedf8602SSascha Hauer */ 458cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) 459cedf8602SSascha Hauer { 460cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 461cedf8602SSascha Hauer 462cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 463cedf8602SSascha Hauer if (!ptr) 4647f4d1e7bSGabor Juhos return ERR_PTR(-ENOMEM); 465cedf8602SSascha Hauer 466cedf8602SSascha Hauer phy = usb_get_phy(type); 467cedf8602SSascha Hauer if (!IS_ERR(phy)) { 468cedf8602SSascha Hauer *ptr = phy; 469cedf8602SSascha Hauer devres_add(dev, ptr); 470cedf8602SSascha Hauer } else 471cedf8602SSascha Hauer devres_free(ptr); 472cedf8602SSascha Hauer 473cedf8602SSascha Hauer return phy; 474cedf8602SSascha Hauer } 475110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy); 476cedf8602SSascha Hauer 477cedf8602SSascha Hauer /** 478cedf8602SSascha Hauer * usb_get_phy - find the USB PHY 479529427b9SLee Jones * @type: the type of the phy the controller requires 480cedf8602SSascha Hauer * 481cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 482cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 483cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 484cedf8602SSascha Hauer * 485cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 486cedf8602SSascha Hauer */ 487cedf8602SSascha Hauer struct usb_phy *usb_get_phy(enum usb_phy_type type) 488cedf8602SSascha Hauer { 489cedf8602SSascha Hauer struct usb_phy *phy = NULL; 490cedf8602SSascha Hauer unsigned long flags; 491cedf8602SSascha Hauer 492cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 493cedf8602SSascha Hauer 494cedf8602SSascha Hauer phy = __usb_find_phy(&phy_list, type); 495cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 496e9d123a5SJosh Boyer pr_debug("PHY: unable to find transceiver of type %s\n", 497cedf8602SSascha Hauer usb_phy_type_string(type)); 4989dc9cb0cSMathias Krause if (!IS_ERR(phy)) 4999dc9cb0cSMathias Krause phy = ERR_PTR(-ENODEV); 5009dc9cb0cSMathias Krause 501cedf8602SSascha Hauer goto err0; 502cedf8602SSascha Hauer } 503cedf8602SSascha Hauer 504cedf8602SSascha Hauer get_device(phy->dev); 505cedf8602SSascha Hauer 506cedf8602SSascha Hauer err0: 507cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 508cedf8602SSascha Hauer 509cedf8602SSascha Hauer return phy; 510cedf8602SSascha Hauer } 511110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy); 512cedf8602SSascha Hauer 513cedf8602SSascha Hauer /** 514e842b84cSNeilBrown * devm_usb_get_phy_by_node - find the USB PHY by device_node 515529427b9SLee Jones * @dev: device that requests this phy 516529427b9SLee Jones * @node: the device_node for the phy device. 517529427b9SLee Jones * @nb: a notifier_block to register with the phy. 518cedf8602SSascha Hauer * 519e842b84cSNeilBrown * Returns the phy driver associated with the given device_node, 520cedf8602SSascha Hauer * after getting a refcount to it, -ENODEV if there is no such phy or 521e842b84cSNeilBrown * -EPROBE_DEFER if the device is not yet loaded. While at that, it 522e842b84cSNeilBrown * also associates the device with 523cedf8602SSascha Hauer * the phy using devres. On driver detach, release function is invoked 524cedf8602SSascha Hauer * on the devres data, then, devres data is freed. 525cedf8602SSascha Hauer * 526e842b84cSNeilBrown * For use by peripheral drivers for devices related to a phy, 527e842b84cSNeilBrown * such as a charger. 528cedf8602SSascha Hauer */ 529e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, 530e842b84cSNeilBrown struct device_node *node, 531e842b84cSNeilBrown struct notifier_block *nb) 532cedf8602SSascha Hauer { 533e842b84cSNeilBrown struct usb_phy *phy = ERR_PTR(-ENOMEM); 534e842b84cSNeilBrown struct phy_devm *ptr; 535cedf8602SSascha Hauer unsigned long flags; 536cedf8602SSascha Hauer 537e842b84cSNeilBrown ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); 538cedf8602SSascha Hauer if (!ptr) { 539cedf8602SSascha Hauer dev_dbg(dev, "failed to allocate memory for devres\n"); 540cedf8602SSascha Hauer goto err0; 541cedf8602SSascha Hauer } 542cedf8602SSascha Hauer 543cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 544cedf8602SSascha Hauer 545cedf8602SSascha Hauer phy = __of_usb_find_phy(node); 546c818a94cSThierry Reding if (IS_ERR(phy)) { 547c818a94cSThierry Reding devres_free(ptr); 548c818a94cSThierry Reding goto err1; 549c818a94cSThierry Reding } 5501290a958SArjun Sreedharan 551c818a94cSThierry Reding if (!try_module_get(phy->dev->driver->owner)) { 552c818a94cSThierry Reding phy = ERR_PTR(-ENODEV); 553cedf8602SSascha Hauer devres_free(ptr); 554cedf8602SSascha Hauer goto err1; 555cedf8602SSascha Hauer } 556e842b84cSNeilBrown if (nb) 557e842b84cSNeilBrown usb_register_notifier(phy, nb); 558e842b84cSNeilBrown ptr->phy = phy; 559e842b84cSNeilBrown ptr->nb = nb; 560cedf8602SSascha Hauer devres_add(dev, ptr); 561cedf8602SSascha Hauer 562cedf8602SSascha Hauer get_device(phy->dev); 563cedf8602SSascha Hauer 564cedf8602SSascha Hauer err1: 565cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 566cedf8602SSascha Hauer 567cedf8602SSascha Hauer err0: 568cedf8602SSascha Hauer 569cedf8602SSascha Hauer return phy; 570cedf8602SSascha Hauer } 571e842b84cSNeilBrown EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); 572e842b84cSNeilBrown 573e842b84cSNeilBrown /** 574e842b84cSNeilBrown * devm_usb_get_phy_by_phandle - find the USB PHY by phandle 575529427b9SLee Jones * @dev: device that requests this phy 576529427b9SLee Jones * @phandle: name of the property holding the phy phandle value 577529427b9SLee Jones * @index: the index of the phy 578e842b84cSNeilBrown * 579e842b84cSNeilBrown * Returns the phy driver associated with the given phandle value, 580e842b84cSNeilBrown * after getting a refcount to it, -ENODEV if there is no such phy or 581e842b84cSNeilBrown * -EPROBE_DEFER if there is a phandle to the phy, but the device is 582e842b84cSNeilBrown * not yet loaded. While at that, it also associates the device with 583e842b84cSNeilBrown * the phy using devres. On driver detach, release function is invoked 584e842b84cSNeilBrown * on the devres data, then, devres data is freed. 585e842b84cSNeilBrown * 586e842b84cSNeilBrown * For use by USB host and peripheral drivers. 587e842b84cSNeilBrown */ 588e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, 589e842b84cSNeilBrown const char *phandle, u8 index) 590e842b84cSNeilBrown { 591e842b84cSNeilBrown struct device_node *node; 592e842b84cSNeilBrown struct usb_phy *phy; 593e842b84cSNeilBrown 594e842b84cSNeilBrown if (!dev->of_node) { 595e842b84cSNeilBrown dev_dbg(dev, "device does not have a device node entry\n"); 596e842b84cSNeilBrown return ERR_PTR(-EINVAL); 597e842b84cSNeilBrown } 598e842b84cSNeilBrown 599e842b84cSNeilBrown node = of_parse_phandle(dev->of_node, phandle, index); 600e842b84cSNeilBrown if (!node) { 601d9241ff2SRob Herring dev_dbg(dev, "failed to get %s phandle in %pOF node\n", phandle, 602d9241ff2SRob Herring dev->of_node); 603e842b84cSNeilBrown return ERR_PTR(-ENODEV); 604e842b84cSNeilBrown } 605e842b84cSNeilBrown phy = devm_usb_get_phy_by_node(dev, node, NULL); 606e842b84cSNeilBrown of_node_put(node); 607e842b84cSNeilBrown return phy; 608e842b84cSNeilBrown } 609110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); 610cedf8602SSascha Hauer 611cedf8602SSascha Hauer /** 612cedf8602SSascha Hauer * devm_usb_put_phy - release the USB PHY 613529427b9SLee Jones * @dev: device that wants to release this phy 614529427b9SLee Jones * @phy: the phy returned by devm_usb_get_phy() 615cedf8602SSascha Hauer * 616cedf8602SSascha Hauer * destroys the devres associated with this phy and invokes usb_put_phy 617cedf8602SSascha Hauer * to release the phy. 618cedf8602SSascha Hauer * 619cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 620cedf8602SSascha Hauer */ 621cedf8602SSascha Hauer void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) 622cedf8602SSascha Hauer { 623cedf8602SSascha Hauer int r; 624cedf8602SSascha Hauer 625cedf8602SSascha Hauer r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); 626cedf8602SSascha Hauer dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); 627cedf8602SSascha Hauer } 628110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_put_phy); 629cedf8602SSascha Hauer 630cedf8602SSascha Hauer /** 631cedf8602SSascha Hauer * usb_put_phy - release the USB PHY 632cedf8602SSascha Hauer * @x: the phy returned by usb_get_phy() 633cedf8602SSascha Hauer * 634cedf8602SSascha Hauer * Releases a refcount the caller received from usb_get_phy(). 635cedf8602SSascha Hauer * 636cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 637cedf8602SSascha Hauer */ 638cedf8602SSascha Hauer void usb_put_phy(struct usb_phy *x) 639cedf8602SSascha Hauer { 640cedf8602SSascha Hauer if (x) { 641cedf8602SSascha Hauer struct module *owner = x->dev->driver->owner; 642cedf8602SSascha Hauer 643cedf8602SSascha Hauer put_device(x->dev); 644cedf8602SSascha Hauer module_put(owner); 645cedf8602SSascha Hauer } 646cedf8602SSascha Hauer } 647110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_put_phy); 648cedf8602SSascha Hauer 649cedf8602SSascha Hauer /** 650529427b9SLee Jones * usb_add_phy: declare the USB PHY 651cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 652529427b9SLee Jones * @type: the type of this PHY 653cedf8602SSascha Hauer * 654cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 655cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 656cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 657cedf8602SSascha Hauer */ 658cedf8602SSascha Hauer int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) 659cedf8602SSascha Hauer { 660cedf8602SSascha Hauer int ret = 0; 661cedf8602SSascha Hauer unsigned long flags; 662cedf8602SSascha Hauer struct usb_phy *phy; 663cedf8602SSascha Hauer 664cedf8602SSascha Hauer if (x->type != USB_PHY_TYPE_UNDEFINED) { 665cedf8602SSascha Hauer dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); 666cedf8602SSascha Hauer return -EINVAL; 667cedf8602SSascha Hauer } 668cedf8602SSascha Hauer 669655283a7SBaolin Wang usb_charger_init(x); 6707d21114dSBaolin Wang ret = usb_add_extcon(x); 6717d21114dSBaolin Wang if (ret) 6727d21114dSBaolin Wang return ret; 6737d21114dSBaolin Wang 67431e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 67531e32227SNeil Zhang 676cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 677cedf8602SSascha Hauer 678cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 679cedf8602SSascha Hauer if (phy->type == type) { 680cedf8602SSascha Hauer ret = -EBUSY; 681cedf8602SSascha Hauer dev_err(x->dev, "transceiver type %s already exists\n", 682cedf8602SSascha Hauer usb_phy_type_string(type)); 683cedf8602SSascha Hauer goto out; 684cedf8602SSascha Hauer } 685cedf8602SSascha Hauer } 686cedf8602SSascha Hauer 687cedf8602SSascha Hauer x->type = type; 688cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 689cedf8602SSascha Hauer 690cedf8602SSascha Hauer out: 691cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 692cedf8602SSascha Hauer return ret; 693cedf8602SSascha Hauer } 694110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy); 695cedf8602SSascha Hauer 696*a8534cb0SGrzegorz Jaszczyk static struct device_type usb_phy_dev_type = { 697*a8534cb0SGrzegorz Jaszczyk .name = "usb_phy", 698*a8534cb0SGrzegorz Jaszczyk .uevent = usb_phy_uevent, 699*a8534cb0SGrzegorz Jaszczyk }; 700*a8534cb0SGrzegorz Jaszczyk 701cedf8602SSascha Hauer /** 702cedf8602SSascha Hauer * usb_add_phy_dev - declare the USB PHY 703cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 704cedf8602SSascha Hauer * 705cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 706cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 707cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 708cedf8602SSascha Hauer */ 709cedf8602SSascha Hauer int usb_add_phy_dev(struct usb_phy *x) 710cedf8602SSascha Hauer { 711cedf8602SSascha Hauer unsigned long flags; 7127d21114dSBaolin Wang int ret; 713cedf8602SSascha Hauer 714cedf8602SSascha Hauer if (!x->dev) { 715cedf8602SSascha Hauer dev_err(x->dev, "no device provided for PHY\n"); 716cedf8602SSascha Hauer return -EINVAL; 717cedf8602SSascha Hauer } 718cedf8602SSascha Hauer 719655283a7SBaolin Wang usb_charger_init(x); 7207d21114dSBaolin Wang ret = usb_add_extcon(x); 7217d21114dSBaolin Wang if (ret) 7227d21114dSBaolin Wang return ret; 7237d21114dSBaolin Wang 724*a8534cb0SGrzegorz Jaszczyk x->dev->type = &usb_phy_dev_type; 725*a8534cb0SGrzegorz Jaszczyk 72631e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 72731e32227SNeil Zhang 728cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 729cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 730cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 731c3c0ac70SJohan Hovold 732cedf8602SSascha Hauer return 0; 733cedf8602SSascha Hauer } 734110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy_dev); 735cedf8602SSascha Hauer 736cedf8602SSascha Hauer /** 737cedf8602SSascha Hauer * usb_remove_phy - remove the OTG PHY 738cedf8602SSascha Hauer * @x: the USB OTG PHY to be removed; 739cedf8602SSascha Hauer * 740cedf8602SSascha Hauer * This reverts the effects of usb_add_phy 741cedf8602SSascha Hauer */ 742cedf8602SSascha Hauer void usb_remove_phy(struct usb_phy *x) 743cedf8602SSascha Hauer { 744cedf8602SSascha Hauer unsigned long flags; 745cedf8602SSascha Hauer 746cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 747c3c0ac70SJohan Hovold if (x) 748cedf8602SSascha Hauer list_del(&x->head); 749cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 750cedf8602SSascha Hauer } 751110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_remove_phy); 752cedf8602SSascha Hauer 753cedf8602SSascha Hauer /** 754df9f7b31SKiran Raparthy * usb_phy_set_event - set event to phy event 755df9f7b31SKiran Raparthy * @x: the phy returned by usb_get_phy(); 756529427b9SLee Jones * @event: event to set 757df9f7b31SKiran Raparthy * 758df9f7b31SKiran Raparthy * This sets event to phy event 759df9f7b31SKiran Raparthy */ 760df9f7b31SKiran Raparthy void usb_phy_set_event(struct usb_phy *x, unsigned long event) 761df9f7b31SKiran Raparthy { 762df9f7b31SKiran Raparthy x->last_event = event; 763df9f7b31SKiran Raparthy } 764df9f7b31SKiran Raparthy EXPORT_SYMBOL_GPL(usb_phy_set_event); 765