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b04b65ab PW |
1 | /* |
2 | * omap_device implementation | |
3 | * | |
887adeac | 4 | * Copyright (C) 2009-2010 Nokia Corporation |
4788da26 | 5 | * Paul Walmsley, Kevin Hilman |
b04b65ab PW |
6 | * |
7 | * Developed in collaboration with (alphabetical order): Benoit | |
4788da26 | 8 | * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram |
b04b65ab PW |
9 | * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard |
10 | * Woodruff | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | * This code provides a consistent interface for OMAP device drivers | |
17 | * to control power management and interconnect properties of their | |
18 | * devices. | |
19 | * | |
20 | * In the medium- to long-term, this code should either be | |
21 | * a) implemented via arch-specific pointers in platform_data | |
22 | * or | |
23 | * b) implemented as a proper omap_bus/omap_device in Linux, no more | |
24 | * platform_data func pointers | |
25 | * | |
26 | * | |
27 | * Guidelines for usage by driver authors: | |
28 | * | |
29 | * 1. These functions are intended to be used by device drivers via | |
30 | * function pointers in struct platform_data. As an example, | |
31 | * omap_device_enable() should be passed to the driver as | |
32 | * | |
33 | * struct foo_driver_platform_data { | |
34 | * ... | |
35 | * int (*device_enable)(struct platform_device *pdev); | |
36 | * ... | |
37 | * } | |
38 | * | |
39 | * Note that the generic "device_enable" name is used, rather than | |
40 | * "omap_device_enable". This is so other architectures can pass in their | |
41 | * own enable/disable functions here. | |
42 | * | |
43 | * This should be populated during device setup: | |
44 | * | |
45 | * ... | |
46 | * pdata->device_enable = omap_device_enable; | |
47 | * ... | |
48 | * | |
49 | * 2. Drivers should first check to ensure the function pointer is not null | |
50 | * before calling it, as in: | |
51 | * | |
52 | * if (pdata->device_enable) | |
53 | * pdata->device_enable(pdev); | |
54 | * | |
55 | * This allows other architectures that don't use similar device_enable()/ | |
56 | * device_shutdown() functions to execute normally. | |
57 | * | |
58 | * ... | |
59 | * | |
60 | * Suggested usage by device drivers: | |
61 | * | |
62 | * During device initialization: | |
63 | * device_enable() | |
64 | * | |
65 | * During device idle: | |
66 | * (save remaining device context if necessary) | |
67 | * device_idle(); | |
68 | * | |
69 | * During device resume: | |
70 | * device_enable(); | |
71 | * (restore context if necessary) | |
72 | * | |
73 | * During device shutdown: | |
74 | * device_shutdown() | |
75 | * (device must be reinitialized at this point to use it again) | |
76 | * | |
77 | */ | |
78 | #undef DEBUG | |
79 | ||
80 | #include <linux/kernel.h> | |
81 | #include <linux/platform_device.h> | |
5a0e3ad6 | 82 | #include <linux/slab.h> |
b04b65ab PW |
83 | #include <linux/err.h> |
84 | #include <linux/io.h> | |
4ef7aca8 | 85 | #include <linux/clk.h> |
da0653fe | 86 | #include <linux/clkdev.h> |
345f79b3 | 87 | #include <linux/pm_runtime.h> |
dc2d07eb BC |
88 | #include <linux/of.h> |
89 | #include <linux/notifier.h> | |
b04b65ab | 90 | |
ce491cf8 TL |
91 | #include <plat/omap_device.h> |
92 | #include <plat/omap_hwmod.h> | |
da0653fe | 93 | #include <plat/clock.h> |
b04b65ab PW |
94 | |
95 | /* These parameters are passed to _omap_device_{de,}activate() */ | |
96 | #define USE_WAKEUP_LAT 0 | |
97 | #define IGNORE_WAKEUP_LAT 1 | |
98 | ||
bfae4f8f KH |
99 | static int omap_device_register(struct platform_device *pdev); |
100 | static int omap_early_device_register(struct platform_device *pdev); | |
a4f6cdb0 BC |
101 | static struct omap_device *omap_device_alloc(struct platform_device *pdev, |
102 | struct omap_hwmod **ohs, int oh_cnt, | |
103 | struct omap_device_pm_latency *pm_lats, | |
104 | int pm_lats_cnt); | |
dc2d07eb | 105 | static void omap_device_delete(struct omap_device *od); |
a4f6cdb0 | 106 | |
a2a28ad9 | 107 | |
b7b5bc91 BC |
108 | static struct omap_device_pm_latency omap_default_latency[] = { |
109 | { | |
110 | .deactivate_func = omap_device_idle_hwmods, | |
111 | .activate_func = omap_device_enable_hwmods, | |
112 | .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, | |
113 | } | |
114 | }; | |
115 | ||
b04b65ab PW |
116 | /* Private functions */ |
117 | ||
b04b65ab PW |
118 | /** |
119 | * _omap_device_activate - increase device readiness | |
120 | * @od: struct omap_device * | |
121 | * @ignore_lat: increase to latency target (0) or full readiness (1)? | |
122 | * | |
123 | * Increase readiness of omap_device @od (thus decreasing device | |
124 | * wakeup latency, but consuming more power). If @ignore_lat is | |
125 | * IGNORE_WAKEUP_LAT, make the omap_device fully active. Otherwise, | |
126 | * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup | |
127 | * latency is greater than the requested maximum wakeup latency, step | |
128 | * backwards in the omap_device_pm_latency table to ensure the | |
129 | * device's maximum wakeup latency is less than or equal to the | |
130 | * requested maximum wakeup latency. Returns 0. | |
131 | */ | |
132 | static int _omap_device_activate(struct omap_device *od, u8 ignore_lat) | |
133 | { | |
f059429e | 134 | struct timespec a, b, c; |
b04b65ab | 135 | |
d66b3fe4 | 136 | dev_dbg(&od->pdev->dev, "omap_device: activating\n"); |
b04b65ab PW |
137 | |
138 | while (od->pm_lat_level > 0) { | |
139 | struct omap_device_pm_latency *odpl; | |
f059429e | 140 | unsigned long long act_lat = 0; |
b04b65ab PW |
141 | |
142 | od->pm_lat_level--; | |
143 | ||
144 | odpl = od->pm_lats + od->pm_lat_level; | |
145 | ||
146 | if (!ignore_lat && | |
147 | (od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit)) | |
148 | break; | |
149 | ||
d2292667 | 150 | read_persistent_clock(&a); |
b04b65ab PW |
151 | |
152 | /* XXX check return code */ | |
153 | odpl->activate_func(od); | |
154 | ||
d2292667 | 155 | read_persistent_clock(&b); |
b04b65ab | 156 | |
f059429e | 157 | c = timespec_sub(b, a); |
0d93d8bb | 158 | act_lat = timespec_to_ns(&c); |
b04b65ab | 159 | |
d66b3fe4 | 160 | dev_dbg(&od->pdev->dev, |
49882c99 KH |
161 | "omap_device: pm_lat %d: activate: elapsed time " |
162 | "%llu nsec\n", od->pm_lat_level, act_lat); | |
b04b65ab | 163 | |
9799aca2 KH |
164 | if (act_lat > odpl->activate_lat) { |
165 | odpl->activate_lat_worst = act_lat; | |
166 | if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) { | |
167 | odpl->activate_lat = act_lat; | |
d66b3fe4 | 168 | dev_dbg(&od->pdev->dev, |
47c3e5d8 GI |
169 | "new worst case activate latency " |
170 | "%d: %llu\n", | |
171 | od->pm_lat_level, act_lat); | |
9799aca2 | 172 | } else |
d66b3fe4 | 173 | dev_warn(&od->pdev->dev, |
49882c99 KH |
174 | "activate latency %d " |
175 | "higher than exptected. (%llu > %d)\n", | |
176 | od->pm_lat_level, act_lat, | |
177 | odpl->activate_lat); | |
9799aca2 | 178 | } |
b04b65ab PW |
179 | |
180 | od->dev_wakeup_lat -= odpl->activate_lat; | |
181 | } | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | /** | |
187 | * _omap_device_deactivate - decrease device readiness | |
188 | * @od: struct omap_device * | |
189 | * @ignore_lat: decrease to latency target (0) or full inactivity (1)? | |
190 | * | |
191 | * Decrease readiness of omap_device @od (thus increasing device | |
192 | * wakeup latency, but conserving power). If @ignore_lat is | |
193 | * IGNORE_WAKEUP_LAT, make the omap_device fully inactive. Otherwise, | |
194 | * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup | |
195 | * latency is less than the requested maximum wakeup latency, step | |
196 | * forwards in the omap_device_pm_latency table to ensure the device's | |
197 | * maximum wakeup latency is less than or equal to the requested | |
198 | * maximum wakeup latency. Returns 0. | |
199 | */ | |
200 | static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat) | |
201 | { | |
f059429e | 202 | struct timespec a, b, c; |
b04b65ab | 203 | |
d66b3fe4 | 204 | dev_dbg(&od->pdev->dev, "omap_device: deactivating\n"); |
b04b65ab PW |
205 | |
206 | while (od->pm_lat_level < od->pm_lats_cnt) { | |
207 | struct omap_device_pm_latency *odpl; | |
f059429e | 208 | unsigned long long deact_lat = 0; |
b04b65ab PW |
209 | |
210 | odpl = od->pm_lats + od->pm_lat_level; | |
211 | ||
212 | if (!ignore_lat && | |
213 | ((od->dev_wakeup_lat + odpl->activate_lat) > | |
214 | od->_dev_wakeup_lat_limit)) | |
215 | break; | |
216 | ||
d2292667 | 217 | read_persistent_clock(&a); |
b04b65ab PW |
218 | |
219 | /* XXX check return code */ | |
220 | odpl->deactivate_func(od); | |
221 | ||
d2292667 | 222 | read_persistent_clock(&b); |
b04b65ab | 223 | |
f059429e | 224 | c = timespec_sub(b, a); |
0d93d8bb | 225 | deact_lat = timespec_to_ns(&c); |
b04b65ab | 226 | |
d66b3fe4 | 227 | dev_dbg(&od->pdev->dev, |
49882c99 KH |
228 | "omap_device: pm_lat %d: deactivate: elapsed time " |
229 | "%llu nsec\n", od->pm_lat_level, deact_lat); | |
b04b65ab | 230 | |
9799aca2 KH |
231 | if (deact_lat > odpl->deactivate_lat) { |
232 | odpl->deactivate_lat_worst = deact_lat; | |
233 | if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) { | |
234 | odpl->deactivate_lat = deact_lat; | |
d66b3fe4 | 235 | dev_dbg(&od->pdev->dev, |
47c3e5d8 GI |
236 | "new worst case deactivate latency " |
237 | "%d: %llu\n", | |
238 | od->pm_lat_level, deact_lat); | |
9799aca2 | 239 | } else |
d66b3fe4 | 240 | dev_warn(&od->pdev->dev, |
49882c99 KH |
241 | "deactivate latency %d " |
242 | "higher than exptected. (%llu > %d)\n", | |
243 | od->pm_lat_level, deact_lat, | |
244 | odpl->deactivate_lat); | |
9799aca2 KH |
245 | } |
246 | ||
b04b65ab PW |
247 | od->dev_wakeup_lat += odpl->activate_lat; |
248 | ||
249 | od->pm_lat_level++; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
bf1e0776 BC |
255 | static void _add_clkdev(struct omap_device *od, const char *clk_alias, |
256 | const char *clk_name) | |
257 | { | |
258 | struct clk *r; | |
259 | struct clk_lookup *l; | |
260 | ||
261 | if (!clk_alias || !clk_name) | |
262 | return; | |
263 | ||
d66b3fe4 | 264 | dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name); |
bf1e0776 | 265 | |
d66b3fe4 | 266 | r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias); |
bf1e0776 | 267 | if (!IS_ERR(r)) { |
d66b3fe4 | 268 | dev_warn(&od->pdev->dev, |
49882c99 | 269 | "alias %s already exists\n", clk_alias); |
bf1e0776 BC |
270 | clk_put(r); |
271 | return; | |
272 | } | |
273 | ||
274 | r = omap_clk_get_by_name(clk_name); | |
275 | if (IS_ERR(r)) { | |
d66b3fe4 | 276 | dev_err(&od->pdev->dev, |
49882c99 | 277 | "omap_clk_get_by_name for %s failed\n", clk_name); |
bf1e0776 BC |
278 | return; |
279 | } | |
280 | ||
d66b3fe4 | 281 | l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev)); |
bf1e0776 | 282 | if (!l) { |
d66b3fe4 | 283 | dev_err(&od->pdev->dev, |
49882c99 | 284 | "clkdev_alloc for %s failed\n", clk_alias); |
bf1e0776 BC |
285 | return; |
286 | } | |
287 | ||
288 | clkdev_add(l); | |
289 | } | |
290 | ||
4ef7aca8 | 291 | /** |
bf1e0776 BC |
292 | * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks |
293 | * and main clock | |
4ef7aca8 | 294 | * @od: struct omap_device *od |
bf1e0776 | 295 | * @oh: struct omap_hwmod *oh |
4ef7aca8 | 296 | * |
bf1e0776 BC |
297 | * For the main clock and every optional clock present per hwmod per |
298 | * omap_device, this function adds an entry in the clkdev table of the | |
299 | * form <dev-id=dev_name, con-id=role> if it does not exist already. | |
4ef7aca8 PB |
300 | * |
301 | * The function is called from inside omap_device_build_ss(), after | |
302 | * omap_device_register. | |
303 | * | |
304 | * This allows drivers to get a pointer to its optional clocks based on its role | |
305 | * by calling clk_get(<dev*>, <role>). | |
bf1e0776 | 306 | * In the case of the main clock, a "fck" alias is used. |
4ef7aca8 PB |
307 | * |
308 | * No return value. | |
309 | */ | |
bf1e0776 BC |
310 | static void _add_hwmod_clocks_clkdev(struct omap_device *od, |
311 | struct omap_hwmod *oh) | |
4ef7aca8 PB |
312 | { |
313 | int i; | |
314 | ||
bf1e0776 | 315 | _add_clkdev(od, "fck", oh->main_clk); |
da0653fe | 316 | |
bf1e0776 BC |
317 | for (i = 0; i < oh->opt_clks_cnt; i++) |
318 | _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk); | |
4ef7aca8 PB |
319 | } |
320 | ||
b04b65ab | 321 | |
dc2d07eb BC |
322 | static struct dev_pm_domain omap_device_pm_domain; |
323 | ||
324 | /** | |
325 | * omap_device_build_from_dt - build an omap_device with multiple hwmods | |
326 | * @pdev_name: name of the platform_device driver to use | |
327 | * @pdev_id: this platform_device's connection ID | |
328 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
329 | * @pdata: platform_data ptr to associate with the platform_device | |
330 | * @pdata_len: amount of memory pointed to by @pdata | |
331 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
332 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
333 | * @is_early_device: should the device be registered as an early device or not | |
334 | * | |
335 | * Function for building an omap_device already registered from device-tree | |
336 | * | |
337 | * Returns 0 or PTR_ERR() on error. | |
338 | */ | |
339 | static int omap_device_build_from_dt(struct platform_device *pdev) | |
340 | { | |
341 | struct omap_hwmod **hwmods; | |
342 | struct omap_device *od; | |
343 | struct omap_hwmod *oh; | |
344 | struct device_node *node = pdev->dev.of_node; | |
345 | const char *oh_name; | |
346 | int oh_cnt, i, ret = 0; | |
347 | ||
348 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); | |
349 | if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) { | |
350 | dev_warn(&pdev->dev, "No 'hwmods' to build omap_device\n"); | |
351 | return -ENODEV; | |
352 | } | |
353 | ||
354 | hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
355 | if (!hwmods) { | |
356 | ret = -ENOMEM; | |
357 | goto odbfd_exit; | |
358 | } | |
359 | ||
360 | for (i = 0; i < oh_cnt; i++) { | |
361 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); | |
362 | oh = omap_hwmod_lookup(oh_name); | |
363 | if (!oh) { | |
364 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", | |
365 | oh_name); | |
366 | ret = -EINVAL; | |
367 | goto odbfd_exit1; | |
368 | } | |
369 | hwmods[i] = oh; | |
370 | } | |
371 | ||
372 | od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0); | |
373 | if (!od) { | |
374 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", | |
375 | oh_name); | |
376 | ret = PTR_ERR(od); | |
377 | goto odbfd_exit1; | |
378 | } | |
379 | ||
380 | if (of_get_property(node, "ti,no_idle_on_suspend", NULL)) | |
381 | omap_device_disable_idle_on_suspend(pdev); | |
382 | ||
383 | pdev->dev.pm_domain = &omap_device_pm_domain; | |
384 | ||
385 | odbfd_exit1: | |
386 | kfree(hwmods); | |
387 | odbfd_exit: | |
388 | return ret; | |
389 | } | |
390 | ||
391 | static int _omap_device_notifier_call(struct notifier_block *nb, | |
392 | unsigned long event, void *dev) | |
393 | { | |
394 | struct platform_device *pdev = to_platform_device(dev); | |
395 | ||
396 | switch (event) { | |
397 | case BUS_NOTIFY_ADD_DEVICE: | |
398 | if (pdev->dev.of_node) | |
399 | omap_device_build_from_dt(pdev); | |
400 | break; | |
401 | ||
402 | case BUS_NOTIFY_DEL_DEVICE: | |
403 | if (pdev->archdata.od) | |
404 | omap_device_delete(pdev->archdata.od); | |
405 | break; | |
406 | } | |
407 | ||
408 | return NOTIFY_DONE; | |
409 | } | |
410 | ||
411 | ||
b04b65ab PW |
412 | /* Public functions for use by core code */ |
413 | ||
c80705aa KH |
414 | /** |
415 | * omap_device_get_context_loss_count - get lost context count | |
416 | * @od: struct omap_device * | |
417 | * | |
418 | * Using the primary hwmod, query the context loss count for this | |
419 | * device. | |
420 | * | |
421 | * Callers should consider context for this device lost any time this | |
422 | * function returns a value different than the value the caller got | |
423 | * the last time it called this function. | |
424 | * | |
425 | * If any hwmods exist for the omap_device assoiated with @pdev, | |
426 | * return the context loss counter for that hwmod, otherwise return | |
427 | * zero. | |
428 | */ | |
429 | u32 omap_device_get_context_loss_count(struct platform_device *pdev) | |
430 | { | |
431 | struct omap_device *od; | |
432 | u32 ret = 0; | |
433 | ||
8f0d69de | 434 | od = to_omap_device(pdev); |
c80705aa KH |
435 | |
436 | if (od->hwmods_cnt) | |
437 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
b04b65ab PW |
442 | /** |
443 | * omap_device_count_resources - count number of struct resource entries needed | |
444 | * @od: struct omap_device * | |
445 | * | |
446 | * Count the number of struct resource entries needed for this | |
447 | * omap_device @od. Used by omap_device_build_ss() to determine how | |
448 | * much memory to allocate before calling | |
449 | * omap_device_fill_resources(). Returns the count. | |
450 | */ | |
a2a28ad9 | 451 | static int omap_device_count_resources(struct omap_device *od) |
b04b65ab | 452 | { |
b04b65ab PW |
453 | int c = 0; |
454 | int i; | |
455 | ||
f39f4898 KVA |
456 | for (i = 0; i < od->hwmods_cnt; i++) |
457 | c += omap_hwmod_count_resources(od->hwmods[i]); | |
b04b65ab PW |
458 | |
459 | pr_debug("omap_device: %s: counted %d total resources across %d " | |
d66b3fe4 | 460 | "hwmods\n", od->pdev->name, c, od->hwmods_cnt); |
b04b65ab PW |
461 | |
462 | return c; | |
463 | } | |
464 | ||
465 | /** | |
466 | * omap_device_fill_resources - fill in array of struct resource | |
467 | * @od: struct omap_device * | |
468 | * @res: pointer to an array of struct resource to be filled in | |
469 | * | |
470 | * Populate one or more empty struct resource pointed to by @res with | |
471 | * the resource data for this omap_device @od. Used by | |
472 | * omap_device_build_ss() after calling omap_device_count_resources(). | |
473 | * Ideally this function would not be needed at all. If omap_device | |
474 | * replaces platform_device, then we can specify our own | |
475 | * get_resource()/ get_irq()/etc functions that use the underlying | |
476 | * omap_hwmod information. Or if platform_device is extended to use | |
477 | * subarchitecture-specific function pointers, the various | |
478 | * platform_device functions can simply call omap_device internal | |
479 | * functions to get device resources. Hacking around the existing | |
480 | * platform_device code wastes memory. Returns 0. | |
481 | */ | |
a2a28ad9 KH |
482 | static int omap_device_fill_resources(struct omap_device *od, |
483 | struct resource *res) | |
b04b65ab | 484 | { |
b04b65ab PW |
485 | int c = 0; |
486 | int i, r; | |
487 | ||
f39f4898 KVA |
488 | for (i = 0; i < od->hwmods_cnt; i++) { |
489 | r = omap_hwmod_fill_resources(od->hwmods[i], res); | |
b04b65ab PW |
490 | res += r; |
491 | c += r; | |
492 | } | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
a4f6cdb0 BC |
497 | /** |
498 | * omap_device_alloc - allocate an omap_device | |
499 | * @pdev: platform_device that will be included in this omap_device | |
500 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
501 | * @pdata: platform_data ptr to associate with the platform_device | |
502 | * @pdata_len: amount of memory pointed to by @pdata | |
503 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
504 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
505 | * | |
506 | * Convenience function for allocating an omap_device structure and filling | |
507 | * hwmods, resources and pm_latency attributes. | |
508 | * | |
509 | * Returns an struct omap_device pointer or ERR_PTR() on error; | |
510 | */ | |
511 | static struct omap_device *omap_device_alloc(struct platform_device *pdev, | |
512 | struct omap_hwmod **ohs, int oh_cnt, | |
513 | struct omap_device_pm_latency *pm_lats, | |
514 | int pm_lats_cnt) | |
515 | { | |
516 | int ret = -ENOMEM; | |
517 | struct omap_device *od; | |
518 | struct resource *res = NULL; | |
519 | int i, res_count; | |
520 | struct omap_hwmod **hwmods; | |
521 | ||
522 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); | |
523 | if (!od) { | |
524 | ret = -ENOMEM; | |
525 | goto oda_exit1; | |
526 | } | |
527 | od->hwmods_cnt = oh_cnt; | |
528 | ||
529 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
530 | if (!hwmods) | |
531 | goto oda_exit2; | |
532 | ||
533 | od->hwmods = hwmods; | |
534 | od->pdev = pdev; | |
535 | ||
536 | /* | |
537 | * HACK: Ideally the resources from DT should match, and hwmod | |
538 | * should just add the missing ones. Since the name is not | |
539 | * properly populated by DT, stick to hwmod resources only. | |
540 | */ | |
541 | if (pdev->num_resources && pdev->resource) | |
542 | dev_warn(&pdev->dev, "%s(): resources already allocated %d\n", | |
543 | __func__, pdev->num_resources); | |
544 | ||
545 | res_count = omap_device_count_resources(od); | |
546 | if (res_count > 0) { | |
547 | dev_dbg(&pdev->dev, "%s(): resources allocated from hwmod %d\n", | |
548 | __func__, res_count); | |
549 | res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL); | |
550 | if (!res) | |
551 | goto oda_exit3; | |
552 | ||
553 | omap_device_fill_resources(od, res); | |
554 | ||
555 | ret = platform_device_add_resources(pdev, res, res_count); | |
556 | kfree(res); | |
557 | ||
558 | if (ret) | |
559 | goto oda_exit3; | |
560 | } | |
561 | ||
562 | if (!pm_lats) { | |
563 | pm_lats = omap_default_latency; | |
564 | pm_lats_cnt = ARRAY_SIZE(omap_default_latency); | |
565 | } | |
566 | ||
567 | od->pm_lats_cnt = pm_lats_cnt; | |
568 | od->pm_lats = kmemdup(pm_lats, | |
569 | sizeof(struct omap_device_pm_latency) * pm_lats_cnt, | |
570 | GFP_KERNEL); | |
571 | if (!od->pm_lats) | |
572 | goto oda_exit3; | |
573 | ||
574 | pdev->archdata.od = od; | |
575 | ||
576 | for (i = 0; i < oh_cnt; i++) { | |
577 | hwmods[i]->od = od; | |
578 | _add_hwmod_clocks_clkdev(od, hwmods[i]); | |
579 | } | |
580 | ||
581 | return od; | |
582 | ||
583 | oda_exit3: | |
584 | kfree(hwmods); | |
585 | oda_exit2: | |
586 | kfree(od); | |
587 | oda_exit1: | |
588 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); | |
589 | ||
590 | return ERR_PTR(ret); | |
591 | } | |
592 | ||
593 | static void omap_device_delete(struct omap_device *od) | |
594 | { | |
dc2d07eb BC |
595 | if (!od) |
596 | return; | |
597 | ||
a4f6cdb0 BC |
598 | od->pdev->archdata.od = NULL; |
599 | kfree(od->pm_lats); | |
600 | kfree(od->hwmods); | |
601 | kfree(od); | |
602 | } | |
603 | ||
b04b65ab PW |
604 | /** |
605 | * omap_device_build - build and register an omap_device with one omap_hwmod | |
606 | * @pdev_name: name of the platform_device driver to use | |
607 | * @pdev_id: this platform_device's connection ID | |
608 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
609 | * @pdata: platform_data ptr to associate with the platform_device | |
610 | * @pdata_len: amount of memory pointed to by @pdata | |
611 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
612 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
c23a97d3 | 613 | * @is_early_device: should the device be registered as an early device or not |
b04b65ab PW |
614 | * |
615 | * Convenience function for building and registering a single | |
616 | * omap_device record, which in turn builds and registers a | |
617 | * platform_device record. See omap_device_build_ss() for more | |
618 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, | |
619 | * passes along the return value of omap_device_build_ss(). | |
620 | */ | |
3528c58e | 621 | struct platform_device *omap_device_build(const char *pdev_name, int pdev_id, |
b04b65ab PW |
622 | struct omap_hwmod *oh, void *pdata, |
623 | int pdata_len, | |
624 | struct omap_device_pm_latency *pm_lats, | |
c23a97d3 | 625 | int pm_lats_cnt, int is_early_device) |
b04b65ab PW |
626 | { |
627 | struct omap_hwmod *ohs[] = { oh }; | |
628 | ||
629 | if (!oh) | |
630 | return ERR_PTR(-EINVAL); | |
631 | ||
632 | return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata, | |
c23a97d3 TG |
633 | pdata_len, pm_lats, pm_lats_cnt, |
634 | is_early_device); | |
b04b65ab PW |
635 | } |
636 | ||
637 | /** | |
638 | * omap_device_build_ss - build and register an omap_device with multiple hwmods | |
639 | * @pdev_name: name of the platform_device driver to use | |
640 | * @pdev_id: this platform_device's connection ID | |
641 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
642 | * @pdata: platform_data ptr to associate with the platform_device | |
643 | * @pdata_len: amount of memory pointed to by @pdata | |
644 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
645 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
c23a97d3 | 646 | * @is_early_device: should the device be registered as an early device or not |
b04b65ab PW |
647 | * |
648 | * Convenience function for building and registering an omap_device | |
649 | * subsystem record. Subsystem records consist of multiple | |
650 | * omap_hwmods. This function in turn builds and registers a | |
651 | * platform_device record. Returns an ERR_PTR() on error, or passes | |
652 | * along the return value of omap_device_register(). | |
653 | */ | |
3528c58e | 654 | struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id, |
b04b65ab PW |
655 | struct omap_hwmod **ohs, int oh_cnt, |
656 | void *pdata, int pdata_len, | |
657 | struct omap_device_pm_latency *pm_lats, | |
c23a97d3 | 658 | int pm_lats_cnt, int is_early_device) |
b04b65ab PW |
659 | { |
660 | int ret = -ENOMEM; | |
d66b3fe4 | 661 | struct platform_device *pdev; |
b04b65ab | 662 | struct omap_device *od; |
b04b65ab PW |
663 | |
664 | if (!ohs || oh_cnt == 0 || !pdev_name) | |
665 | return ERR_PTR(-EINVAL); | |
666 | ||
667 | if (!pdata && pdata_len > 0) | |
668 | return ERR_PTR(-EINVAL); | |
669 | ||
d66b3fe4 KH |
670 | pdev = platform_device_alloc(pdev_name, pdev_id); |
671 | if (!pdev) { | |
672 | ret = -ENOMEM; | |
673 | goto odbs_exit; | |
674 | } | |
675 | ||
a4f6cdb0 BC |
676 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
677 | if (pdev->id != -1) | |
678 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
679 | else | |
680 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
b04b65ab | 681 | |
a4f6cdb0 BC |
682 | od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt); |
683 | if (!od) | |
d66b3fe4 | 684 | goto odbs_exit1; |
d66b3fe4 KH |
685 | |
686 | ret = platform_device_add_data(pdev, pdata, pdata_len); | |
49b368a6 | 687 | if (ret) |
a4f6cdb0 | 688 | goto odbs_exit2; |
b04b65ab | 689 | |
c23a97d3 | 690 | if (is_early_device) |
d66b3fe4 | 691 | ret = omap_early_device_register(pdev); |
c23a97d3 | 692 | else |
d66b3fe4 KH |
693 | ret = omap_device_register(pdev); |
694 | if (ret) | |
a4f6cdb0 | 695 | goto odbs_exit2; |
06563581 | 696 | |
d66b3fe4 | 697 | return pdev; |
b04b65ab | 698 | |
d66b3fe4 | 699 | odbs_exit2: |
a4f6cdb0 | 700 | omap_device_delete(od); |
d66b3fe4 KH |
701 | odbs_exit1: |
702 | platform_device_put(pdev); | |
703 | odbs_exit: | |
b04b65ab PW |
704 | |
705 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); | |
706 | ||
707 | return ERR_PTR(ret); | |
708 | } | |
709 | ||
c23a97d3 TG |
710 | /** |
711 | * omap_early_device_register - register an omap_device as an early platform | |
712 | * device. | |
713 | * @od: struct omap_device * to register | |
714 | * | |
715 | * Register the omap_device structure. This currently just calls | |
716 | * platform_early_add_device() on the underlying platform_device. | |
717 | * Returns 0 by default. | |
718 | */ | |
bfae4f8f | 719 | static int omap_early_device_register(struct platform_device *pdev) |
c23a97d3 TG |
720 | { |
721 | struct platform_device *devices[1]; | |
722 | ||
bfae4f8f | 723 | devices[0] = pdev; |
c23a97d3 TG |
724 | early_platform_add_devices(devices, 1); |
725 | return 0; | |
726 | } | |
727 | ||
256a5435 | 728 | #ifdef CONFIG_PM_RUNTIME |
638080c3 KH |
729 | static int _od_runtime_suspend(struct device *dev) |
730 | { | |
731 | struct platform_device *pdev = to_platform_device(dev); | |
345f79b3 | 732 | int ret; |
638080c3 | 733 | |
345f79b3 KH |
734 | ret = pm_generic_runtime_suspend(dev); |
735 | ||
736 | if (!ret) | |
737 | omap_device_idle(pdev); | |
738 | ||
739 | return ret; | |
740 | } | |
741 | ||
742 | static int _od_runtime_idle(struct device *dev) | |
743 | { | |
744 | return pm_generic_runtime_idle(dev); | |
638080c3 KH |
745 | } |
746 | ||
747 | static int _od_runtime_resume(struct device *dev) | |
748 | { | |
749 | struct platform_device *pdev = to_platform_device(dev); | |
750 | ||
345f79b3 KH |
751 | omap_device_enable(pdev); |
752 | ||
753 | return pm_generic_runtime_resume(dev); | |
638080c3 | 754 | } |
256a5435 | 755 | #endif |
638080c3 | 756 | |
c03f007a KH |
757 | #ifdef CONFIG_SUSPEND |
758 | static int _od_suspend_noirq(struct device *dev) | |
759 | { | |
760 | struct platform_device *pdev = to_platform_device(dev); | |
761 | struct omap_device *od = to_omap_device(pdev); | |
762 | int ret; | |
763 | ||
80c6d1e6 KH |
764 | if (od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND) |
765 | return pm_generic_suspend_noirq(dev); | |
766 | ||
c03f007a KH |
767 | ret = pm_generic_suspend_noirq(dev); |
768 | ||
769 | if (!ret && !pm_runtime_status_suspended(dev)) { | |
770 | if (pm_generic_runtime_suspend(dev) == 0) { | |
771 | omap_device_idle(pdev); | |
772 | od->flags |= OMAP_DEVICE_SUSPENDED; | |
773 | } | |
774 | } | |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
779 | static int _od_resume_noirq(struct device *dev) | |
780 | { | |
781 | struct platform_device *pdev = to_platform_device(dev); | |
782 | struct omap_device *od = to_omap_device(pdev); | |
783 | ||
80c6d1e6 KH |
784 | if (od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND) |
785 | return pm_generic_resume_noirq(dev); | |
786 | ||
c03f007a KH |
787 | if ((od->flags & OMAP_DEVICE_SUSPENDED) && |
788 | !pm_runtime_status_suspended(dev)) { | |
789 | od->flags &= ~OMAP_DEVICE_SUSPENDED; | |
790 | omap_device_enable(pdev); | |
791 | pm_generic_runtime_resume(dev); | |
792 | } | |
793 | ||
794 | return pm_generic_resume_noirq(dev); | |
795 | } | |
126caf13 KH |
796 | #else |
797 | #define _od_suspend_noirq NULL | |
798 | #define _od_resume_noirq NULL | |
c03f007a KH |
799 | #endif |
800 | ||
564b905a | 801 | static struct dev_pm_domain omap_device_pm_domain = { |
638080c3 | 802 | .ops = { |
256a5435 KH |
803 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
804 | _od_runtime_idle) | |
638080c3 | 805 | USE_PLATFORM_PM_SLEEP_OPS |
ff35336d KH |
806 | .suspend_noirq = _od_suspend_noirq, |
807 | .resume_noirq = _od_resume_noirq, | |
638080c3 KH |
808 | } |
809 | }; | |
810 | ||
b04b65ab PW |
811 | /** |
812 | * omap_device_register - register an omap_device with one omap_hwmod | |
813 | * @od: struct omap_device * to register | |
814 | * | |
815 | * Register the omap_device structure. This currently just calls | |
816 | * platform_device_register() on the underlying platform_device. | |
817 | * Returns the return value of platform_device_register(). | |
818 | */ | |
bfae4f8f | 819 | static int omap_device_register(struct platform_device *pdev) |
b04b65ab | 820 | { |
bfae4f8f | 821 | pr_debug("omap_device: %s: registering\n", pdev->name); |
b04b65ab | 822 | |
bfae4f8f KH |
823 | pdev->dev.parent = &omap_device_parent; |
824 | pdev->dev.pm_domain = &omap_device_pm_domain; | |
d66b3fe4 | 825 | return platform_device_add(pdev); |
b04b65ab PW |
826 | } |
827 | ||
828 | ||
829 | /* Public functions for use by device drivers through struct platform_data */ | |
830 | ||
831 | /** | |
832 | * omap_device_enable - fully activate an omap_device | |
833 | * @od: struct omap_device * to activate | |
834 | * | |
835 | * Do whatever is necessary for the hwmods underlying omap_device @od | |
836 | * to be accessible and ready to operate. This generally involves | |
837 | * enabling clocks, setting SYSCONFIG registers; and in the future may | |
838 | * involve remuxing pins. Device drivers should call this function | |
839 | * (through platform_data function pointers) where they would normally | |
840 | * enable clocks, etc. Returns -EINVAL if called when the omap_device | |
841 | * is already enabled, or passes along the return value of | |
842 | * _omap_device_activate(). | |
843 | */ | |
844 | int omap_device_enable(struct platform_device *pdev) | |
845 | { | |
846 | int ret; | |
847 | struct omap_device *od; | |
848 | ||
8f0d69de | 849 | od = to_omap_device(pdev); |
b04b65ab PW |
850 | |
851 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
852 | dev_warn(&pdev->dev, |
853 | "omap_device: %s() called from invalid state %d\n", | |
854 | __func__, od->_state); | |
b04b65ab PW |
855 | return -EINVAL; |
856 | } | |
857 | ||
858 | /* Enable everything if we're enabling this device from scratch */ | |
859 | if (od->_state == OMAP_DEVICE_STATE_UNKNOWN) | |
860 | od->pm_lat_level = od->pm_lats_cnt; | |
861 | ||
862 | ret = _omap_device_activate(od, IGNORE_WAKEUP_LAT); | |
863 | ||
864 | od->dev_wakeup_lat = 0; | |
5f1b6ef7 | 865 | od->_dev_wakeup_lat_limit = UINT_MAX; |
b04b65ab PW |
866 | od->_state = OMAP_DEVICE_STATE_ENABLED; |
867 | ||
868 | return ret; | |
869 | } | |
870 | ||
871 | /** | |
872 | * omap_device_idle - idle an omap_device | |
873 | * @od: struct omap_device * to idle | |
874 | * | |
875 | * Idle omap_device @od by calling as many .deactivate_func() entries | |
876 | * in the omap_device's pm_lats table as is possible without exceeding | |
877 | * the device's maximum wakeup latency limit, pm_lat_limit. Device | |
878 | * drivers should call this function (through platform_data function | |
879 | * pointers) where they would normally disable clocks after operations | |
880 | * complete, etc.. Returns -EINVAL if the omap_device is not | |
881 | * currently enabled, or passes along the return value of | |
882 | * _omap_device_deactivate(). | |
883 | */ | |
884 | int omap_device_idle(struct platform_device *pdev) | |
885 | { | |
886 | int ret; | |
887 | struct omap_device *od; | |
888 | ||
8f0d69de | 889 | od = to_omap_device(pdev); |
b04b65ab PW |
890 | |
891 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
892 | dev_warn(&pdev->dev, |
893 | "omap_device: %s() called from invalid state %d\n", | |
894 | __func__, od->_state); | |
b04b65ab PW |
895 | return -EINVAL; |
896 | } | |
897 | ||
898 | ret = _omap_device_deactivate(od, USE_WAKEUP_LAT); | |
899 | ||
900 | od->_state = OMAP_DEVICE_STATE_IDLE; | |
901 | ||
902 | return ret; | |
903 | } | |
904 | ||
905 | /** | |
906 | * omap_device_shutdown - shut down an omap_device | |
907 | * @od: struct omap_device * to shut down | |
908 | * | |
909 | * Shut down omap_device @od by calling all .deactivate_func() entries | |
910 | * in the omap_device's pm_lats table and then shutting down all of | |
911 | * the underlying omap_hwmods. Used when a device is being "removed" | |
912 | * or a device driver is being unloaded. Returns -EINVAL if the | |
913 | * omap_device is not currently enabled or idle, or passes along the | |
914 | * return value of _omap_device_deactivate(). | |
915 | */ | |
916 | int omap_device_shutdown(struct platform_device *pdev) | |
917 | { | |
918 | int ret, i; | |
919 | struct omap_device *od; | |
b04b65ab | 920 | |
8f0d69de | 921 | od = to_omap_device(pdev); |
b04b65ab PW |
922 | |
923 | if (od->_state != OMAP_DEVICE_STATE_ENABLED && | |
924 | od->_state != OMAP_DEVICE_STATE_IDLE) { | |
49882c99 KH |
925 | dev_warn(&pdev->dev, |
926 | "omap_device: %s() called from invalid state %d\n", | |
927 | __func__, od->_state); | |
b04b65ab PW |
928 | return -EINVAL; |
929 | } | |
930 | ||
931 | ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT); | |
932 | ||
f39f4898 KVA |
933 | for (i = 0; i < od->hwmods_cnt; i++) |
934 | omap_hwmod_shutdown(od->hwmods[i]); | |
b04b65ab PW |
935 | |
936 | od->_state = OMAP_DEVICE_STATE_SHUTDOWN; | |
937 | ||
938 | return ret; | |
939 | } | |
940 | ||
941 | /** | |
942 | * omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim | |
943 | * @od: struct omap_device * | |
944 | * | |
945 | * When a device's maximum wakeup latency limit changes, call some of | |
946 | * the .activate_func or .deactivate_func function pointers in the | |
947 | * omap_device's pm_lats array to ensure that the device's maximum | |
948 | * wakeup latency is less than or equal to the new latency limit. | |
949 | * Intended to be called by OMAP PM code whenever a device's maximum | |
950 | * wakeup latency limit changes (e.g., via | |
951 | * omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be | |
952 | * done (e.g., if the omap_device is not currently idle, or if the | |
953 | * wakeup latency is already current with the new limit) or passes | |
954 | * along the return value of _omap_device_deactivate() or | |
955 | * _omap_device_activate(). | |
956 | */ | |
957 | int omap_device_align_pm_lat(struct platform_device *pdev, | |
958 | u32 new_wakeup_lat_limit) | |
959 | { | |
960 | int ret = -EINVAL; | |
961 | struct omap_device *od; | |
962 | ||
8f0d69de | 963 | od = to_omap_device(pdev); |
b04b65ab PW |
964 | |
965 | if (new_wakeup_lat_limit == od->dev_wakeup_lat) | |
966 | return 0; | |
967 | ||
968 | od->_dev_wakeup_lat_limit = new_wakeup_lat_limit; | |
969 | ||
970 | if (od->_state != OMAP_DEVICE_STATE_IDLE) | |
971 | return 0; | |
972 | else if (new_wakeup_lat_limit > od->dev_wakeup_lat) | |
973 | ret = _omap_device_deactivate(od, USE_WAKEUP_LAT); | |
974 | else if (new_wakeup_lat_limit < od->dev_wakeup_lat) | |
975 | ret = _omap_device_activate(od, USE_WAKEUP_LAT); | |
976 | ||
977 | return ret; | |
978 | } | |
979 | ||
980 | /** | |
981 | * omap_device_get_pwrdm - return the powerdomain * associated with @od | |
982 | * @od: struct omap_device * | |
983 | * | |
984 | * Return the powerdomain associated with the first underlying | |
985 | * omap_hwmod for this omap_device. Intended for use by core OMAP PM | |
986 | * code. Returns NULL on error or a struct powerdomain * upon | |
987 | * success. | |
988 | */ | |
989 | struct powerdomain *omap_device_get_pwrdm(struct omap_device *od) | |
990 | { | |
991 | /* | |
992 | * XXX Assumes that all omap_hwmod powerdomains are identical. | |
993 | * This may not necessarily be true. There should be a sanity | |
994 | * check in here to WARN() if any difference appears. | |
995 | */ | |
996 | if (!od->hwmods_cnt) | |
997 | return NULL; | |
998 | ||
999 | return omap_hwmod_get_pwrdm(od->hwmods[0]); | |
1000 | } | |
1001 | ||
db2a60bf PW |
1002 | /** |
1003 | * omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base | |
1004 | * @od: struct omap_device * | |
1005 | * | |
1006 | * Return the MPU's virtual address for the base of the hwmod, from | |
1007 | * the ioremap() that the hwmod code does. Only valid if there is one | |
1008 | * hwmod associated with this device. Returns NULL if there are zero | |
1009 | * or more than one hwmods associated with this omap_device; | |
1010 | * otherwise, passes along the return value from | |
1011 | * omap_hwmod_get_mpu_rt_va(). | |
1012 | */ | |
1013 | void __iomem *omap_device_get_rt_va(struct omap_device *od) | |
1014 | { | |
1015 | if (od->hwmods_cnt != 1) | |
1016 | return NULL; | |
1017 | ||
1018 | return omap_hwmod_get_mpu_rt_va(od->hwmods[0]); | |
1019 | } | |
1020 | ||
1f8a7d52 NM |
1021 | /** |
1022 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | |
1023 | * device pointer. | |
1024 | * @oh_name: name of the hwmod device | |
1025 | * | |
1026 | * Returns back a struct device * pointer associated with a hwmod | |
1027 | * device represented by a hwmod_name | |
1028 | */ | |
1029 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | |
1030 | { | |
1031 | struct omap_hwmod *oh; | |
1032 | ||
1033 | if (!oh_name) { | |
1034 | WARN(1, "%s: no hwmod name!\n", __func__); | |
1035 | return ERR_PTR(-EINVAL); | |
1036 | } | |
1037 | ||
1038 | oh = omap_hwmod_lookup(oh_name); | |
1039 | if (IS_ERR_OR_NULL(oh)) { | |
1040 | WARN(1, "%s: no hwmod for %s\n", __func__, | |
1041 | oh_name); | |
1042 | return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV); | |
1043 | } | |
1044 | if (IS_ERR_OR_NULL(oh->od)) { | |
1045 | WARN(1, "%s: no omap_device for %s\n", __func__, | |
1046 | oh_name); | |
1047 | return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV); | |
1048 | } | |
1049 | ||
1050 | if (IS_ERR_OR_NULL(oh->od->pdev)) | |
1051 | return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV); | |
1052 | ||
1053 | return &oh->od->pdev->dev; | |
1054 | } | |
1055 | EXPORT_SYMBOL(omap_device_get_by_hwmod_name); | |
1056 | ||
b04b65ab PW |
1057 | /* |
1058 | * Public functions intended for use in omap_device_pm_latency | |
1059 | * .activate_func and .deactivate_func function pointers | |
1060 | */ | |
1061 | ||
1062 | /** | |
1063 | * omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods | |
1064 | * @od: struct omap_device *od | |
1065 | * | |
1066 | * Enable all underlying hwmods. Returns 0. | |
1067 | */ | |
1068 | int omap_device_enable_hwmods(struct omap_device *od) | |
1069 | { | |
b04b65ab PW |
1070 | int i; |
1071 | ||
f39f4898 KVA |
1072 | for (i = 0; i < od->hwmods_cnt; i++) |
1073 | omap_hwmod_enable(od->hwmods[i]); | |
b04b65ab PW |
1074 | |
1075 | /* XXX pass along return value here? */ | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods | |
1081 | * @od: struct omap_device *od | |
1082 | * | |
1083 | * Idle all underlying hwmods. Returns 0. | |
1084 | */ | |
1085 | int omap_device_idle_hwmods(struct omap_device *od) | |
1086 | { | |
b04b65ab PW |
1087 | int i; |
1088 | ||
f39f4898 KVA |
1089 | for (i = 0; i < od->hwmods_cnt; i++) |
1090 | omap_hwmod_idle(od->hwmods[i]); | |
b04b65ab PW |
1091 | |
1092 | /* XXX pass along return value here? */ | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | /** | |
1097 | * omap_device_disable_clocks - disable all main and interface clocks | |
1098 | * @od: struct omap_device *od | |
1099 | * | |
1100 | * Disable the main functional clock and interface clock for all of the | |
1101 | * omap_hwmods associated with the omap_device. Returns 0. | |
1102 | */ | |
1103 | int omap_device_disable_clocks(struct omap_device *od) | |
1104 | { | |
b04b65ab PW |
1105 | int i; |
1106 | ||
f39f4898 KVA |
1107 | for (i = 0; i < od->hwmods_cnt; i++) |
1108 | omap_hwmod_disable_clocks(od->hwmods[i]); | |
b04b65ab PW |
1109 | |
1110 | /* XXX pass along return value here? */ | |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | /** | |
1115 | * omap_device_enable_clocks - enable all main and interface clocks | |
1116 | * @od: struct omap_device *od | |
1117 | * | |
1118 | * Enable the main functional clock and interface clock for all of the | |
1119 | * omap_hwmods associated with the omap_device. Returns 0. | |
1120 | */ | |
1121 | int omap_device_enable_clocks(struct omap_device *od) | |
1122 | { | |
b04b65ab PW |
1123 | int i; |
1124 | ||
f39f4898 KVA |
1125 | for (i = 0; i < od->hwmods_cnt; i++) |
1126 | omap_hwmod_enable_clocks(od->hwmods[i]); | |
b04b65ab PW |
1127 | |
1128 | /* XXX pass along return value here? */ | |
1129 | return 0; | |
1130 | } | |
0d5e8252 KH |
1131 | |
1132 | struct device omap_device_parent = { | |
1133 | .init_name = "omap", | |
1134 | .parent = &platform_bus, | |
1135 | }; | |
1136 | ||
dc2d07eb BC |
1137 | static struct notifier_block platform_nb = { |
1138 | .notifier_call = _omap_device_notifier_call, | |
1139 | }; | |
1140 | ||
0d5e8252 KH |
1141 | static int __init omap_device_init(void) |
1142 | { | |
dc2d07eb | 1143 | bus_register_notifier(&platform_bus_type, &platform_nb); |
0d5e8252 KH |
1144 | return device_register(&omap_device_parent); |
1145 | } | |
1146 | core_initcall(omap_device_init); |