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55716d26 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
8bc487d1 GL |
2 | /* |
3 | * OF helpers for the MDIO (Ethernet PHY) API | |
4 | * | |
5 | * Copyright (c) 2009 Secret Lab Technologies, Ltd. | |
6 | * | |
8bc487d1 GL |
7 | * This file provides helper functions for extracting PHY device information |
8 | * out of the OpenFirmware device tree and using it to populate an mii_bus. | |
9 | */ | |
10 | ||
24c30dbb AV |
11 | #include <linux/kernel.h> |
12 | #include <linux/device.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/err.h> | |
8bc487d1 | 15 | #include <linux/phy.h> |
3be2a49e | 16 | #include <linux/phy_fixed.h> |
8bc487d1 | 17 | #include <linux/of.h> |
e3873444 | 18 | #include <linux/of_irq.h> |
8bc487d1 | 19 | #include <linux/of_mdio.h> |
b7862412 | 20 | #include <linux/of_net.h> |
8bc487d1 GL |
21 | #include <linux/module.h> |
22 | ||
69226896 RQ |
23 | #define DEFAULT_GPIO_RESET_DELAY 10 /* in microseconds */ |
24 | ||
8bc487d1 GL |
25 | MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); |
26 | MODULE_LICENSE("GPL"); | |
27 | ||
3c6f5592 JG |
28 | /* Extract the clause 22 phy ID from the compatible string of the form |
29 | * ethernet-phy-idAAAA.BBBB */ | |
30 | static int of_get_phy_id(struct device_node *device, u32 *phy_id) | |
31 | { | |
32 | struct property *prop; | |
33 | const char *cp; | |
34 | unsigned int upper, lower; | |
35 | ||
36 | of_property_for_each_string(device, "compatible", prop, cp) { | |
37 | if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) == 2) { | |
38 | *phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF); | |
39 | return 0; | |
40 | } | |
41 | } | |
42 | return -EINVAL; | |
43 | } | |
44 | ||
66bdede4 | 45 | static int of_mdiobus_register_phy(struct mii_bus *mdio, |
b520bd07 | 46 | struct device_node *child, u32 addr) |
2e79cb30 FF |
47 | { |
48 | struct phy_device *phy; | |
49 | bool is_c45; | |
f15c586d | 50 | int rc; |
3c6f5592 | 51 | u32 phy_id; |
2e79cb30 FF |
52 | |
53 | is_c45 = of_device_is_compatible(child, | |
54 | "ethernet-phy-ieee802.3-c45"); | |
55 | ||
3c6f5592 JG |
56 | if (!is_c45 && !of_get_phy_id(child, &phy_id)) |
57 | phy = phy_device_create(mdio, addr, phy_id, 0, NULL); | |
58 | else | |
59 | phy = get_phy_device(mdio, addr, is_c45); | |
af5840a9 | 60 | if (IS_ERR(phy)) |
66bdede4 | 61 | return PTR_ERR(phy); |
2e79cb30 | 62 | |
66bdede4 GU |
63 | rc = of_irq_get(child, 0); |
64 | if (rc == -EPROBE_DEFER) { | |
65 | phy_device_free(phy); | |
66 | return rc; | |
67 | } | |
f15c586d BD |
68 | if (rc > 0) { |
69 | phy->irq = rc; | |
1bc16add | 70 | mdio->irq[addr] = rc; |
f15c586d | 71 | } else { |
1bc16add | 72 | phy->irq = mdio->irq[addr]; |
2e79cb30 FF |
73 | } |
74 | ||
ab6016e0 FF |
75 | if (of_property_read_bool(child, "broken-turn-around")) |
76 | mdio->phy_ignore_ta_mask |= 1 << addr; | |
77 | ||
04f629f7 RL |
78 | of_property_read_u32(child, "reset-assert-us", |
79 | &phy->mdio.reset_assert_delay); | |
80 | of_property_read_u32(child, "reset-deassert-us", | |
81 | &phy->mdio.reset_deassert_delay); | |
3a30ae6e | 82 | |
2e79cb30 FF |
83 | /* Associate the OF node with the device structure so it |
84 | * can be looked up later */ | |
85 | of_node_get(child); | |
e5a03bfd | 86 | phy->mdio.dev.of_node = child; |
94a5ef1b | 87 | phy->mdio.dev.fwnode = of_fwnode_handle(child); |
2e79cb30 FF |
88 | |
89 | /* All data is now stored in the phy struct; | |
90 | * register it */ | |
91 | rc = phy_device_register(phy); | |
92 | if (rc) { | |
93 | phy_device_free(phy); | |
94 | of_node_put(child); | |
66bdede4 | 95 | return rc; |
2e79cb30 FF |
96 | } |
97 | ||
a613b26a RH |
98 | dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n", |
99 | child, addr); | |
66bdede4 | 100 | return 0; |
2e79cb30 FF |
101 | } |
102 | ||
66bdede4 GU |
103 | static int of_mdiobus_register_device(struct mii_bus *mdio, |
104 | struct device_node *child, u32 addr) | |
a9049e0c AL |
105 | { |
106 | struct mdio_device *mdiodev; | |
107 | int rc; | |
108 | ||
109 | mdiodev = mdio_device_create(mdio, addr); | |
a3478bae | 110 | if (IS_ERR(mdiodev)) |
66bdede4 | 111 | return PTR_ERR(mdiodev); |
a9049e0c AL |
112 | |
113 | /* Associate the OF node with the device structure so it | |
114 | * can be looked up later. | |
115 | */ | |
116 | of_node_get(child); | |
117 | mdiodev->dev.of_node = child; | |
94a5ef1b | 118 | mdiodev->dev.fwnode = of_fwnode_handle(child); |
a9049e0c AL |
119 | |
120 | /* All data is now stored in the mdiodev struct; register it. */ | |
121 | rc = mdio_device_register(mdiodev); | |
122 | if (rc) { | |
123 | mdio_device_free(mdiodev); | |
124 | of_node_put(child); | |
66bdede4 | 125 | return rc; |
a9049e0c AL |
126 | } |
127 | ||
a613b26a RH |
128 | dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n", |
129 | child, addr); | |
66bdede4 | 130 | return 0; |
a9049e0c AL |
131 | } |
132 | ||
ae461131 AL |
133 | /* The following is a list of PHY compatible strings which appear in |
134 | * some DTBs. The compatible string is never matched against a PHY | |
135 | * driver, so is pointless. We only expect devices which are not PHYs | |
136 | * to have a compatible string, so they can be matched to an MDIO | |
137 | * driver. Encourage users to upgrade their DT blobs to remove these. | |
138 | */ | |
139 | static const struct of_device_id whitelist_phys[] = { | |
140 | { .compatible = "brcm,40nm-ephy" }, | |
7e1392fb | 141 | { .compatible = "broadcom,bcm5241" }, |
ae461131 AL |
142 | { .compatible = "marvell,88E1111", }, |
143 | { .compatible = "marvell,88e1116", }, | |
144 | { .compatible = "marvell,88e1118", }, | |
f5a952c0 | 145 | { .compatible = "marvell,88e1145", }, |
ae461131 AL |
146 | { .compatible = "marvell,88e1149r", }, |
147 | { .compatible = "marvell,88e1310", }, | |
148 | { .compatible = "marvell,88E1510", }, | |
149 | { .compatible = "marvell,88E1514", }, | |
150 | { .compatible = "moxa,moxart-rtl8201cp", }, | |
151 | {} | |
152 | }; | |
153 | ||
801a8ef5 AL |
154 | /* |
155 | * Return true if the child node is for a phy. It must either: | |
156 | * o Compatible string of "ethernet-phy-idX.X" | |
157 | * o Compatible string of "ethernet-phy-ieee802.3-c45" | |
158 | * o Compatible string of "ethernet-phy-ieee802.3-c22" | |
ae461131 | 159 | * o In the white list above (and issue a warning) |
801a8ef5 AL |
160 | * o No compatibility string |
161 | * | |
162 | * A device which is not a phy is expected to have a compatible string | |
163 | * indicating what sort of device it is. | |
164 | */ | |
165 | static bool of_mdiobus_child_is_phy(struct device_node *child) | |
166 | { | |
167 | u32 phy_id; | |
168 | ||
169 | if (of_get_phy_id(child, &phy_id) != -EINVAL) | |
170 | return true; | |
171 | ||
172 | if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45")) | |
173 | return true; | |
174 | ||
175 | if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22")) | |
176 | return true; | |
177 | ||
ae461131 AL |
178 | if (of_match_node(whitelist_phys, child)) { |
179 | pr_warn(FW_WARN | |
0d638a07 RH |
180 | "%pOF: Whitelisted compatible string. Please remove\n", |
181 | child); | |
ae461131 AL |
182 | return true; |
183 | } | |
184 | ||
801a8ef5 AL |
185 | if (!of_find_property(child, "compatible", NULL)) |
186 | return true; | |
187 | ||
188 | return false; | |
189 | } | |
190 | ||
8bc487d1 GL |
191 | /** |
192 | * of_mdiobus_register - Register mii_bus and create PHYs from the device tree | |
193 | * @mdio: pointer to mii_bus structure | |
194 | * @np: pointer to device_node of MDIO bus. | |
195 | * | |
196 | * This function registers the mii_bus structure and registers a phy_device | |
197 | * for each child node of @np. | |
198 | */ | |
199 | int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) | |
200 | { | |
8bc487d1 | 201 | struct device_node *child; |
2e79cb30 | 202 | bool scanphys = false; |
e7f4dc35 | 203 | int addr, rc; |
8bc487d1 | 204 | |
6d07a68a FF |
205 | if (!np) |
206 | return mdiobus_register(mdio); | |
207 | ||
a77f4f70 FF |
208 | /* Do not continue if the node is disabled */ |
209 | if (!of_device_is_available(np)) | |
210 | return -ENODEV; | |
211 | ||
8bc487d1 GL |
212 | /* Mask out all PHYs from auto probing. Instead the PHYs listed in |
213 | * the device tree are populated after the bus has been registered */ | |
214 | mdio->phy_mask = ~0; | |
215 | ||
25106022 | 216 | mdio->dev.of_node = np; |
94a5ef1b | 217 | mdio->dev.fwnode = of_fwnode_handle(np); |
25106022 | 218 | |
69226896 RQ |
219 | /* Get bus level PHY reset GPIO details */ |
220 | mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY; | |
221 | of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us); | |
69226896 | 222 | |
8bc487d1 GL |
223 | /* Register the MDIO bus */ |
224 | rc = mdiobus_register(mdio); | |
225 | if (rc) | |
226 | return rc; | |
227 | ||
801a8ef5 | 228 | /* Loop over the child nodes and register a phy_device for each phy */ |
e207e761 | 229 | for_each_available_child_of_node(np, child) { |
8f838288 DM |
230 | addr = of_mdio_parse_addr(&mdio->dev, child); |
231 | if (addr < 0) { | |
779d835e | 232 | scanphys = true; |
19458860 DD |
233 | continue; |
234 | } | |
235 | ||
801a8ef5 | 236 | if (of_mdiobus_child_is_phy(child)) |
66bdede4 | 237 | rc = of_mdiobus_register_phy(mdio, child, addr); |
a9049e0c | 238 | else |
66bdede4 | 239 | rc = of_mdiobus_register_device(mdio, child, addr); |
95f566de MB |
240 | |
241 | if (rc == -ENODEV) | |
242 | dev_err(&mdio->dev, | |
243 | "MDIO device at address %d is missing.\n", | |
244 | addr); | |
245 | else if (rc) | |
66bdede4 | 246 | goto unregister; |
8bc487d1 GL |
247 | } |
248 | ||
779d835e SH |
249 | if (!scanphys) |
250 | return 0; | |
251 | ||
252 | /* auto scan for PHYs with empty reg property */ | |
253 | for_each_available_child_of_node(np, child) { | |
254 | /* Skip PHYs with reg property set */ | |
2fca6d28 | 255 | if (of_find_property(child, "reg", NULL)) |
779d835e SH |
256 | continue; |
257 | ||
779d835e SH |
258 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { |
259 | /* skip already registered PHYs */ | |
7f854420 | 260 | if (mdiobus_is_registered_device(mdio, addr)) |
779d835e SH |
261 | continue; |
262 | ||
263 | /* be noisy to encourage people to set reg property */ | |
a613b26a RH |
264 | dev_info(&mdio->dev, "scan phy %pOFn at address %i\n", |
265 | child, addr); | |
779d835e | 266 | |
66bdede4 GU |
267 | if (of_mdiobus_child_is_phy(child)) { |
268 | rc = of_mdiobus_register_phy(mdio, child, addr); | |
95f566de | 269 | if (rc && rc != -ENODEV) |
66bdede4 GU |
270 | goto unregister; |
271 | } | |
779d835e SH |
272 | } |
273 | } | |
274 | ||
8bc487d1 | 275 | return 0; |
66bdede4 GU |
276 | |
277 | unregister: | |
278 | mdiobus_unregister(mdio); | |
279 | return rc; | |
8bc487d1 GL |
280 | } |
281 | EXPORT_SYMBOL(of_mdiobus_register); | |
282 | ||
08a7963a | 283 | /* Helper function for of_phy_find_device */ |
418e3ea1 | 284 | static int of_phy_match(struct device *dev, const void *phy_np) |
08a7963a | 285 | { |
61c7a080 | 286 | return dev->of_node == phy_np; |
08a7963a JP |
287 | } |
288 | ||
8bc487d1 GL |
289 | /** |
290 | * of_phy_find_device - Give a PHY node, find the phy_device | |
291 | * @phy_np: Pointer to the phy's device tree node | |
292 | * | |
f018ae7a RK |
293 | * If successful, returns a pointer to the phy_device with the embedded |
294 | * struct device refcount incremented by one, or NULL on failure. | |
8bc487d1 GL |
295 | */ |
296 | struct phy_device *of_phy_find_device(struct device_node *phy_np) | |
297 | { | |
298 | struct device *d; | |
6ed74236 AL |
299 | struct mdio_device *mdiodev; |
300 | ||
8bc487d1 GL |
301 | if (!phy_np) |
302 | return NULL; | |
303 | ||
08a7963a | 304 | d = bus_find_device(&mdio_bus_type, NULL, phy_np, of_phy_match); |
6ed74236 AL |
305 | if (d) { |
306 | mdiodev = to_mdio_device(d); | |
307 | if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) | |
308 | return to_phy_device(d); | |
3ae30f4c | 309 | put_device(d); |
6ed74236 AL |
310 | } |
311 | ||
312 | return NULL; | |
8bc487d1 GL |
313 | } |
314 | EXPORT_SYMBOL(of_phy_find_device); | |
315 | ||
316 | /** | |
317 | * of_phy_connect - Connect to the phy described in the device tree | |
318 | * @dev: pointer to net_device claiming the phy | |
319 | * @phy_np: Pointer to device tree node for the PHY | |
320 | * @hndlr: Link state callback for the network device | |
735c1e25 | 321 | * @flags: flags to pass to the PHY |
8bc487d1 GL |
322 | * @iface: PHY data interface type |
323 | * | |
f018ae7a RK |
324 | * If successful, returns a pointer to the phy_device with the embedded |
325 | * struct device refcount incremented by one, or NULL on failure. The | |
326 | * refcount must be dropped by calling phy_disconnect() or phy_detach(). | |
8bc487d1 GL |
327 | */ |
328 | struct phy_device *of_phy_connect(struct net_device *dev, | |
329 | struct device_node *phy_np, | |
330 | void (*hndlr)(struct net_device *), u32 flags, | |
331 | phy_interface_t iface) | |
332 | { | |
333 | struct phy_device *phy = of_phy_find_device(phy_np); | |
f018ae7a | 334 | int ret; |
8bc487d1 GL |
335 | |
336 | if (!phy) | |
337 | return NULL; | |
338 | ||
2f637151 FF |
339 | phy->dev_flags = flags; |
340 | ||
f018ae7a RK |
341 | ret = phy_connect_direct(dev, phy, hndlr, iface); |
342 | ||
343 | /* refcount is held by phy_connect_direct() on success */ | |
e5a03bfd | 344 | put_device(&phy->mdio.dev); |
f018ae7a RK |
345 | |
346 | return ret ? NULL : phy; | |
8bc487d1 GL |
347 | } |
348 | EXPORT_SYMBOL(of_phy_connect); | |
24c30dbb | 349 | |
b7862412 DL |
350 | /** |
351 | * of_phy_get_and_connect | |
352 | * - Get phy node and connect to the phy described in the device tree | |
353 | * @dev: pointer to net_device claiming the phy | |
354 | * @np: Pointer to device tree node for the net_device claiming the phy | |
355 | * @hndlr: Link state callback for the network device | |
356 | * | |
357 | * If successful, returns a pointer to the phy_device with the embedded | |
358 | * struct device refcount incremented by one, or NULL on failure. The | |
359 | * refcount must be dropped by calling phy_disconnect() or phy_detach(). | |
360 | */ | |
361 | struct phy_device *of_phy_get_and_connect(struct net_device *dev, | |
362 | struct device_node *np, | |
363 | void (*hndlr)(struct net_device *)) | |
364 | { | |
365 | phy_interface_t iface; | |
366 | struct device_node *phy_np; | |
367 | struct phy_device *phy; | |
6eb9c9da | 368 | int ret; |
b7862412 DL |
369 | |
370 | iface = of_get_phy_mode(np); | |
371 | if (iface < 0) | |
372 | return NULL; | |
6eb9c9da LW |
373 | if (of_phy_is_fixed_link(np)) { |
374 | ret = of_phy_register_fixed_link(np); | |
375 | if (ret < 0) { | |
376 | netdev_err(dev, "broken fixed-link specification\n"); | |
377 | return NULL; | |
378 | } | |
379 | phy_np = of_node_get(np); | |
380 | } else { | |
381 | phy_np = of_parse_phandle(np, "phy-handle", 0); | |
382 | if (!phy_np) | |
383 | return NULL; | |
384 | } | |
b7862412 DL |
385 | |
386 | phy = of_phy_connect(dev, phy_np, hndlr, 0, iface); | |
387 | ||
388 | of_node_put(phy_np); | |
389 | ||
390 | return phy; | |
391 | } | |
392 | EXPORT_SYMBOL(of_phy_get_and_connect); | |
393 | ||
7614aba6 AF |
394 | /** |
395 | * of_phy_attach - Attach to a PHY without starting the state machine | |
396 | * @dev: pointer to net_device claiming the phy | |
397 | * @phy_np: Node pointer for the PHY | |
398 | * @flags: flags to pass to the PHY | |
399 | * @iface: PHY data interface type | |
f018ae7a RK |
400 | * |
401 | * If successful, returns a pointer to the phy_device with the embedded | |
402 | * struct device refcount incremented by one, or NULL on failure. The | |
403 | * refcount must be dropped by calling phy_disconnect() or phy_detach(). | |
7614aba6 AF |
404 | */ |
405 | struct phy_device *of_phy_attach(struct net_device *dev, | |
406 | struct device_node *phy_np, u32 flags, | |
407 | phy_interface_t iface) | |
408 | { | |
409 | struct phy_device *phy = of_phy_find_device(phy_np); | |
f018ae7a | 410 | int ret; |
7614aba6 AF |
411 | |
412 | if (!phy) | |
413 | return NULL; | |
414 | ||
f018ae7a RK |
415 | ret = phy_attach_direct(dev, phy, flags, iface); |
416 | ||
417 | /* refcount is held by phy_attach_direct() on success */ | |
e5a03bfd | 418 | put_device(&phy->mdio.dev); |
f018ae7a RK |
419 | |
420 | return ret ? NULL : phy; | |
7614aba6 AF |
421 | } |
422 | EXPORT_SYMBOL(of_phy_attach); | |
3be2a49e | 423 | |
3be2a49e TP |
424 | /* |
425 | * of_phy_is_fixed_link() and of_phy_register_fixed_link() must | |
426 | * support two DT bindings: | |
427 | * - the old DT binding, where 'fixed-link' was a property with 5 | |
428 | * cells encoding various informations about the fixed PHY | |
429 | * - the new DT binding, where 'fixed-link' is a sub-node of the | |
430 | * Ethernet device. | |
431 | */ | |
432 | bool of_phy_is_fixed_link(struct device_node *np) | |
433 | { | |
434 | struct device_node *dn; | |
4cba5c21 SS |
435 | int len, err; |
436 | const char *managed; | |
3be2a49e TP |
437 | |
438 | /* New binding */ | |
439 | dn = of_get_child_by_name(np, "fixed-link"); | |
440 | if (dn) { | |
441 | of_node_put(dn); | |
442 | return true; | |
443 | } | |
444 | ||
4cba5c21 SS |
445 | err = of_property_read_string(np, "managed", &managed); |
446 | if (err == 0 && strcmp(managed, "auto") != 0) | |
447 | return true; | |
448 | ||
3be2a49e TP |
449 | /* Old binding */ |
450 | if (of_get_property(np, "fixed-link", &len) && | |
451 | len == (5 * sizeof(__be32))) | |
452 | return true; | |
453 | ||
454 | return false; | |
455 | } | |
456 | EXPORT_SYMBOL(of_phy_is_fixed_link); | |
457 | ||
458 | int of_phy_register_fixed_link(struct device_node *np) | |
459 | { | |
460 | struct fixed_phy_status status = {}; | |
461 | struct device_node *fixed_link_node; | |
d226a2b8 | 462 | u32 fixed_link_prop[5]; |
4cba5c21 SS |
463 | const char *managed; |
464 | ||
5a7a8346 SS |
465 | if (of_property_read_string(np, "managed", &managed) == 0 && |
466 | strcmp(managed, "in-band-status") == 0) { | |
467 | /* status is zeroed, namely its .link member */ | |
468 | goto register_phy; | |
4cba5c21 | 469 | } |
3be2a49e TP |
470 | |
471 | /* New binding */ | |
472 | fixed_link_node = of_get_child_by_name(np, "fixed-link"); | |
473 | if (fixed_link_node) { | |
474 | status.link = 1; | |
a72e1541 RR |
475 | status.duplex = of_property_read_bool(fixed_link_node, |
476 | "full-duplex"); | |
48c1699d JH |
477 | if (of_property_read_u32(fixed_link_node, "speed", |
478 | &status.speed)) { | |
479 | of_node_put(fixed_link_node); | |
3be2a49e | 480 | return -EINVAL; |
48c1699d | 481 | } |
a72e1541 RR |
482 | status.pause = of_property_read_bool(fixed_link_node, "pause"); |
483 | status.asym_pause = of_property_read_bool(fixed_link_node, | |
484 | "asym-pause"); | |
3be2a49e | 485 | of_node_put(fixed_link_node); |
a5597008 | 486 | |
5a7a8346 | 487 | goto register_phy; |
3be2a49e TP |
488 | } |
489 | ||
490 | /* Old binding */ | |
d226a2b8 SS |
491 | if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop, |
492 | ARRAY_SIZE(fixed_link_prop)) == 0) { | |
3be2a49e | 493 | status.link = 1; |
d226a2b8 SS |
494 | status.duplex = fixed_link_prop[1]; |
495 | status.speed = fixed_link_prop[2]; | |
496 | status.pause = fixed_link_prop[3]; | |
497 | status.asym_pause = fixed_link_prop[4]; | |
5a7a8346 | 498 | goto register_phy; |
3be2a49e TP |
499 | } |
500 | ||
501 | return -ENODEV; | |
5a7a8346 SS |
502 | |
503 | register_phy: | |
5468e82f | 504 | return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np)); |
3be2a49e TP |
505 | } |
506 | EXPORT_SYMBOL(of_phy_register_fixed_link); | |
3f65047c JH |
507 | |
508 | void of_phy_deregister_fixed_link(struct device_node *np) | |
509 | { | |
510 | struct phy_device *phydev; | |
511 | ||
512 | phydev = of_phy_find_device(np); | |
513 | if (!phydev) | |
514 | return; | |
515 | ||
516 | fixed_phy_unregister(phydev); | |
517 | ||
518 | put_device(&phydev->mdio.dev); /* of_phy_find_device() */ | |
519 | phy_device_free(phydev); /* fixed_phy_register() */ | |
520 | } | |
521 | EXPORT_SYMBOL(of_phy_deregister_fixed_link); |