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9cf793f9 | 1 | |
b04b65ab PW |
2 | /* |
3 | * omap_device implementation | |
4 | * | |
887adeac | 5 | * Copyright (C) 2009-2010 Nokia Corporation |
4788da26 | 6 | * Paul Walmsley, Kevin Hilman |
b04b65ab PW |
7 | * |
8 | * Developed in collaboration with (alphabetical order): Benoit | |
4788da26 | 9 | * Cousson, Thara Gopinath, Tony Lindgren, Rajendra Nayak, Vikram |
b04b65ab PW |
10 | * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard |
11 | * Woodruff | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | * | |
17 | * This code provides a consistent interface for OMAP device drivers | |
18 | * to control power management and interconnect properties of their | |
19 | * devices. | |
20 | * | |
21 | * In the medium- to long-term, this code should either be | |
22 | * a) implemented via arch-specific pointers in platform_data | |
23 | * or | |
24 | * b) implemented as a proper omap_bus/omap_device in Linux, no more | |
25 | * platform_data func pointers | |
26 | * | |
27 | * | |
28 | * Guidelines for usage by driver authors: | |
29 | * | |
30 | * 1. These functions are intended to be used by device drivers via | |
31 | * function pointers in struct platform_data. As an example, | |
32 | * omap_device_enable() should be passed to the driver as | |
33 | * | |
34 | * struct foo_driver_platform_data { | |
35 | * ... | |
36 | * int (*device_enable)(struct platform_device *pdev); | |
37 | * ... | |
38 | * } | |
39 | * | |
40 | * Note that the generic "device_enable" name is used, rather than | |
41 | * "omap_device_enable". This is so other architectures can pass in their | |
42 | * own enable/disable functions here. | |
43 | * | |
44 | * This should be populated during device setup: | |
45 | * | |
46 | * ... | |
47 | * pdata->device_enable = omap_device_enable; | |
48 | * ... | |
49 | * | |
50 | * 2. Drivers should first check to ensure the function pointer is not null | |
51 | * before calling it, as in: | |
52 | * | |
53 | * if (pdata->device_enable) | |
54 | * pdata->device_enable(pdev); | |
55 | * | |
56 | * This allows other architectures that don't use similar device_enable()/ | |
57 | * device_shutdown() functions to execute normally. | |
58 | * | |
59 | * ... | |
60 | * | |
61 | * Suggested usage by device drivers: | |
62 | * | |
63 | * During device initialization: | |
64 | * device_enable() | |
65 | * | |
66 | * During device idle: | |
67 | * (save remaining device context if necessary) | |
68 | * device_idle(); | |
69 | * | |
70 | * During device resume: | |
71 | * device_enable(); | |
72 | * (restore context if necessary) | |
73 | * | |
74 | * During device shutdown: | |
75 | * device_shutdown() | |
76 | * (device must be reinitialized at this point to use it again) | |
77 | * | |
78 | */ | |
79 | #undef DEBUG | |
80 | ||
81 | #include <linux/kernel.h> | |
55581415 | 82 | #include <linux/export.h> |
b04b65ab | 83 | #include <linux/platform_device.h> |
5a0e3ad6 | 84 | #include <linux/slab.h> |
b04b65ab PW |
85 | #include <linux/err.h> |
86 | #include <linux/io.h> | |
4ef7aca8 | 87 | #include <linux/clk.h> |
da0653fe | 88 | #include <linux/clkdev.h> |
345f79b3 | 89 | #include <linux/pm_runtime.h> |
dc2d07eb BC |
90 | #include <linux/of.h> |
91 | #include <linux/notifier.h> | |
b04b65ab | 92 | |
ce491cf8 TL |
93 | #include <plat/omap_device.h> |
94 | #include <plat/omap_hwmod.h> | |
da0653fe | 95 | #include <plat/clock.h> |
b04b65ab PW |
96 | |
97 | /* These parameters are passed to _omap_device_{de,}activate() */ | |
98 | #define USE_WAKEUP_LAT 0 | |
99 | #define IGNORE_WAKEUP_LAT 1 | |
100 | ||
bfae4f8f | 101 | static int omap_early_device_register(struct platform_device *pdev); |
a2a28ad9 | 102 | |
b7b5bc91 BC |
103 | static struct omap_device_pm_latency omap_default_latency[] = { |
104 | { | |
105 | .deactivate_func = omap_device_idle_hwmods, | |
106 | .activate_func = omap_device_enable_hwmods, | |
107 | .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, | |
108 | } | |
109 | }; | |
110 | ||
b04b65ab PW |
111 | /* Private functions */ |
112 | ||
b04b65ab PW |
113 | /** |
114 | * _omap_device_activate - increase device readiness | |
115 | * @od: struct omap_device * | |
116 | * @ignore_lat: increase to latency target (0) or full readiness (1)? | |
117 | * | |
118 | * Increase readiness of omap_device @od (thus decreasing device | |
119 | * wakeup latency, but consuming more power). If @ignore_lat is | |
120 | * IGNORE_WAKEUP_LAT, make the omap_device fully active. Otherwise, | |
121 | * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup | |
122 | * latency is greater than the requested maximum wakeup latency, step | |
123 | * backwards in the omap_device_pm_latency table to ensure the | |
124 | * device's maximum wakeup latency is less than or equal to the | |
125 | * requested maximum wakeup latency. Returns 0. | |
126 | */ | |
127 | static int _omap_device_activate(struct omap_device *od, u8 ignore_lat) | |
128 | { | |
f059429e | 129 | struct timespec a, b, c; |
b04b65ab | 130 | |
d66b3fe4 | 131 | dev_dbg(&od->pdev->dev, "omap_device: activating\n"); |
b04b65ab PW |
132 | |
133 | while (od->pm_lat_level > 0) { | |
134 | struct omap_device_pm_latency *odpl; | |
f059429e | 135 | unsigned long long act_lat = 0; |
b04b65ab PW |
136 | |
137 | od->pm_lat_level--; | |
138 | ||
139 | odpl = od->pm_lats + od->pm_lat_level; | |
140 | ||
141 | if (!ignore_lat && | |
142 | (od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit)) | |
143 | break; | |
144 | ||
d2292667 | 145 | read_persistent_clock(&a); |
b04b65ab PW |
146 | |
147 | /* XXX check return code */ | |
148 | odpl->activate_func(od); | |
149 | ||
d2292667 | 150 | read_persistent_clock(&b); |
b04b65ab | 151 | |
f059429e | 152 | c = timespec_sub(b, a); |
0d93d8bb | 153 | act_lat = timespec_to_ns(&c); |
b04b65ab | 154 | |
d66b3fe4 | 155 | dev_dbg(&od->pdev->dev, |
49882c99 KH |
156 | "omap_device: pm_lat %d: activate: elapsed time " |
157 | "%llu nsec\n", od->pm_lat_level, act_lat); | |
b04b65ab | 158 | |
9799aca2 KH |
159 | if (act_lat > odpl->activate_lat) { |
160 | odpl->activate_lat_worst = act_lat; | |
161 | if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) { | |
162 | odpl->activate_lat = act_lat; | |
d66b3fe4 | 163 | dev_dbg(&od->pdev->dev, |
47c3e5d8 GI |
164 | "new worst case activate latency " |
165 | "%d: %llu\n", | |
166 | od->pm_lat_level, act_lat); | |
9799aca2 | 167 | } else |
d66b3fe4 | 168 | dev_warn(&od->pdev->dev, |
49882c99 KH |
169 | "activate latency %d " |
170 | "higher than exptected. (%llu > %d)\n", | |
171 | od->pm_lat_level, act_lat, | |
172 | odpl->activate_lat); | |
9799aca2 | 173 | } |
b04b65ab PW |
174 | |
175 | od->dev_wakeup_lat -= odpl->activate_lat; | |
176 | } | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | /** | |
182 | * _omap_device_deactivate - decrease device readiness | |
183 | * @od: struct omap_device * | |
184 | * @ignore_lat: decrease to latency target (0) or full inactivity (1)? | |
185 | * | |
186 | * Decrease readiness of omap_device @od (thus increasing device | |
187 | * wakeup latency, but conserving power). If @ignore_lat is | |
188 | * IGNORE_WAKEUP_LAT, make the omap_device fully inactive. Otherwise, | |
189 | * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup | |
190 | * latency is less than the requested maximum wakeup latency, step | |
191 | * forwards in the omap_device_pm_latency table to ensure the device's | |
192 | * maximum wakeup latency is less than or equal to the requested | |
193 | * maximum wakeup latency. Returns 0. | |
194 | */ | |
195 | static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat) | |
196 | { | |
f059429e | 197 | struct timespec a, b, c; |
b04b65ab | 198 | |
d66b3fe4 | 199 | dev_dbg(&od->pdev->dev, "omap_device: deactivating\n"); |
b04b65ab PW |
200 | |
201 | while (od->pm_lat_level < od->pm_lats_cnt) { | |
202 | struct omap_device_pm_latency *odpl; | |
f059429e | 203 | unsigned long long deact_lat = 0; |
b04b65ab PW |
204 | |
205 | odpl = od->pm_lats + od->pm_lat_level; | |
206 | ||
207 | if (!ignore_lat && | |
208 | ((od->dev_wakeup_lat + odpl->activate_lat) > | |
209 | od->_dev_wakeup_lat_limit)) | |
210 | break; | |
211 | ||
d2292667 | 212 | read_persistent_clock(&a); |
b04b65ab PW |
213 | |
214 | /* XXX check return code */ | |
215 | odpl->deactivate_func(od); | |
216 | ||
d2292667 | 217 | read_persistent_clock(&b); |
b04b65ab | 218 | |
f059429e | 219 | c = timespec_sub(b, a); |
0d93d8bb | 220 | deact_lat = timespec_to_ns(&c); |
b04b65ab | 221 | |
d66b3fe4 | 222 | dev_dbg(&od->pdev->dev, |
49882c99 KH |
223 | "omap_device: pm_lat %d: deactivate: elapsed time " |
224 | "%llu nsec\n", od->pm_lat_level, deact_lat); | |
b04b65ab | 225 | |
9799aca2 KH |
226 | if (deact_lat > odpl->deactivate_lat) { |
227 | odpl->deactivate_lat_worst = deact_lat; | |
228 | if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) { | |
229 | odpl->deactivate_lat = deact_lat; | |
d66b3fe4 | 230 | dev_dbg(&od->pdev->dev, |
47c3e5d8 GI |
231 | "new worst case deactivate latency " |
232 | "%d: %llu\n", | |
233 | od->pm_lat_level, deact_lat); | |
9799aca2 | 234 | } else |
d66b3fe4 | 235 | dev_warn(&od->pdev->dev, |
49882c99 KH |
236 | "deactivate latency %d " |
237 | "higher than exptected. (%llu > %d)\n", | |
238 | od->pm_lat_level, deact_lat, | |
239 | odpl->deactivate_lat); | |
9799aca2 KH |
240 | } |
241 | ||
b04b65ab PW |
242 | od->dev_wakeup_lat += odpl->activate_lat; |
243 | ||
244 | od->pm_lat_level++; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
bf1e0776 BC |
250 | static void _add_clkdev(struct omap_device *od, const char *clk_alias, |
251 | const char *clk_name) | |
252 | { | |
253 | struct clk *r; | |
254 | struct clk_lookup *l; | |
255 | ||
256 | if (!clk_alias || !clk_name) | |
257 | return; | |
258 | ||
d66b3fe4 | 259 | dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name); |
bf1e0776 | 260 | |
d66b3fe4 | 261 | r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias); |
bf1e0776 | 262 | if (!IS_ERR(r)) { |
d66b3fe4 | 263 | dev_warn(&od->pdev->dev, |
49882c99 | 264 | "alias %s already exists\n", clk_alias); |
bf1e0776 BC |
265 | clk_put(r); |
266 | return; | |
267 | } | |
268 | ||
269 | r = omap_clk_get_by_name(clk_name); | |
270 | if (IS_ERR(r)) { | |
d66b3fe4 | 271 | dev_err(&od->pdev->dev, |
49882c99 | 272 | "omap_clk_get_by_name for %s failed\n", clk_name); |
bf1e0776 BC |
273 | return; |
274 | } | |
275 | ||
d66b3fe4 | 276 | l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev)); |
bf1e0776 | 277 | if (!l) { |
d66b3fe4 | 278 | dev_err(&od->pdev->dev, |
49882c99 | 279 | "clkdev_alloc for %s failed\n", clk_alias); |
bf1e0776 BC |
280 | return; |
281 | } | |
282 | ||
283 | clkdev_add(l); | |
284 | } | |
285 | ||
4ef7aca8 | 286 | /** |
bf1e0776 BC |
287 | * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks |
288 | * and main clock | |
4ef7aca8 | 289 | * @od: struct omap_device *od |
bf1e0776 | 290 | * @oh: struct omap_hwmod *oh |
4ef7aca8 | 291 | * |
bf1e0776 BC |
292 | * For the main clock and every optional clock present per hwmod per |
293 | * omap_device, this function adds an entry in the clkdev table of the | |
294 | * form <dev-id=dev_name, con-id=role> if it does not exist already. | |
4ef7aca8 PB |
295 | * |
296 | * The function is called from inside omap_device_build_ss(), after | |
297 | * omap_device_register. | |
298 | * | |
299 | * This allows drivers to get a pointer to its optional clocks based on its role | |
300 | * by calling clk_get(<dev*>, <role>). | |
bf1e0776 | 301 | * In the case of the main clock, a "fck" alias is used. |
4ef7aca8 PB |
302 | * |
303 | * No return value. | |
304 | */ | |
bf1e0776 BC |
305 | static void _add_hwmod_clocks_clkdev(struct omap_device *od, |
306 | struct omap_hwmod *oh) | |
4ef7aca8 PB |
307 | { |
308 | int i; | |
309 | ||
bf1e0776 | 310 | _add_clkdev(od, "fck", oh->main_clk); |
da0653fe | 311 | |
bf1e0776 BC |
312 | for (i = 0; i < oh->opt_clks_cnt; i++) |
313 | _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk); | |
4ef7aca8 PB |
314 | } |
315 | ||
b04b65ab | 316 | |
dc2d07eb BC |
317 | /** |
318 | * omap_device_build_from_dt - build an omap_device with multiple hwmods | |
319 | * @pdev_name: name of the platform_device driver to use | |
320 | * @pdev_id: this platform_device's connection ID | |
321 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
322 | * @pdata: platform_data ptr to associate with the platform_device | |
323 | * @pdata_len: amount of memory pointed to by @pdata | |
324 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
325 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
326 | * @is_early_device: should the device be registered as an early device or not | |
327 | * | |
328 | * Function for building an omap_device already registered from device-tree | |
329 | * | |
330 | * Returns 0 or PTR_ERR() on error. | |
331 | */ | |
332 | static int omap_device_build_from_dt(struct platform_device *pdev) | |
333 | { | |
334 | struct omap_hwmod **hwmods; | |
335 | struct omap_device *od; | |
336 | struct omap_hwmod *oh; | |
337 | struct device_node *node = pdev->dev.of_node; | |
338 | const char *oh_name; | |
339 | int oh_cnt, i, ret = 0; | |
340 | ||
341 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); | |
342 | if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) { | |
5dc06b7e | 343 | dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n"); |
dc2d07eb BC |
344 | return -ENODEV; |
345 | } | |
346 | ||
347 | hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
348 | if (!hwmods) { | |
349 | ret = -ENOMEM; | |
350 | goto odbfd_exit; | |
351 | } | |
352 | ||
353 | for (i = 0; i < oh_cnt; i++) { | |
354 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); | |
355 | oh = omap_hwmod_lookup(oh_name); | |
356 | if (!oh) { | |
357 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", | |
358 | oh_name); | |
359 | ret = -EINVAL; | |
360 | goto odbfd_exit1; | |
361 | } | |
362 | hwmods[i] = oh; | |
363 | } | |
364 | ||
365 | od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0); | |
366 | if (!od) { | |
367 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", | |
368 | oh_name); | |
369 | ret = PTR_ERR(od); | |
370 | goto odbfd_exit1; | |
371 | } | |
372 | ||
373 | if (of_get_property(node, "ti,no_idle_on_suspend", NULL)) | |
374 | omap_device_disable_idle_on_suspend(pdev); | |
375 | ||
376 | pdev->dev.pm_domain = &omap_device_pm_domain; | |
377 | ||
378 | odbfd_exit1: | |
379 | kfree(hwmods); | |
380 | odbfd_exit: | |
381 | return ret; | |
382 | } | |
383 | ||
384 | static int _omap_device_notifier_call(struct notifier_block *nb, | |
385 | unsigned long event, void *dev) | |
386 | { | |
387 | struct platform_device *pdev = to_platform_device(dev); | |
e753345b | 388 | struct omap_device *od; |
dc2d07eb BC |
389 | |
390 | switch (event) { | |
dc2d07eb BC |
391 | case BUS_NOTIFY_DEL_DEVICE: |
392 | if (pdev->archdata.od) | |
393 | omap_device_delete(pdev->archdata.od); | |
394 | break; | |
e753345b KH |
395 | case BUS_NOTIFY_ADD_DEVICE: |
396 | if (pdev->dev.of_node) | |
397 | omap_device_build_from_dt(pdev); | |
398 | /* fall through */ | |
399 | default: | |
400 | od = to_omap_device(pdev); | |
401 | if (od) | |
402 | od->_driver_status = event; | |
dc2d07eb BC |
403 | } |
404 | ||
405 | return NOTIFY_DONE; | |
406 | } | |
407 | ||
408 | ||
b04b65ab PW |
409 | /* Public functions for use by core code */ |
410 | ||
c80705aa KH |
411 | /** |
412 | * omap_device_get_context_loss_count - get lost context count | |
413 | * @od: struct omap_device * | |
414 | * | |
415 | * Using the primary hwmod, query the context loss count for this | |
416 | * device. | |
417 | * | |
418 | * Callers should consider context for this device lost any time this | |
419 | * function returns a value different than the value the caller got | |
420 | * the last time it called this function. | |
421 | * | |
422 | * If any hwmods exist for the omap_device assoiated with @pdev, | |
423 | * return the context loss counter for that hwmod, otherwise return | |
424 | * zero. | |
425 | */ | |
fc013873 | 426 | int omap_device_get_context_loss_count(struct platform_device *pdev) |
c80705aa KH |
427 | { |
428 | struct omap_device *od; | |
429 | u32 ret = 0; | |
430 | ||
8f0d69de | 431 | od = to_omap_device(pdev); |
c80705aa KH |
432 | |
433 | if (od->hwmods_cnt) | |
434 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); | |
435 | ||
436 | return ret; | |
437 | } | |
438 | ||
b04b65ab PW |
439 | /** |
440 | * omap_device_count_resources - count number of struct resource entries needed | |
441 | * @od: struct omap_device * | |
442 | * | |
443 | * Count the number of struct resource entries needed for this | |
444 | * omap_device @od. Used by omap_device_build_ss() to determine how | |
445 | * much memory to allocate before calling | |
446 | * omap_device_fill_resources(). Returns the count. | |
447 | */ | |
a2a28ad9 | 448 | static int omap_device_count_resources(struct omap_device *od) |
b04b65ab | 449 | { |
b04b65ab PW |
450 | int c = 0; |
451 | int i; | |
452 | ||
f39f4898 KVA |
453 | for (i = 0; i < od->hwmods_cnt; i++) |
454 | c += omap_hwmod_count_resources(od->hwmods[i]); | |
b04b65ab PW |
455 | |
456 | pr_debug("omap_device: %s: counted %d total resources across %d " | |
d66b3fe4 | 457 | "hwmods\n", od->pdev->name, c, od->hwmods_cnt); |
b04b65ab PW |
458 | |
459 | return c; | |
460 | } | |
461 | ||
462 | /** | |
463 | * omap_device_fill_resources - fill in array of struct resource | |
464 | * @od: struct omap_device * | |
465 | * @res: pointer to an array of struct resource to be filled in | |
466 | * | |
467 | * Populate one or more empty struct resource pointed to by @res with | |
468 | * the resource data for this omap_device @od. Used by | |
469 | * omap_device_build_ss() after calling omap_device_count_resources(). | |
470 | * Ideally this function would not be needed at all. If omap_device | |
471 | * replaces platform_device, then we can specify our own | |
472 | * get_resource()/ get_irq()/etc functions that use the underlying | |
473 | * omap_hwmod information. Or if platform_device is extended to use | |
474 | * subarchitecture-specific function pointers, the various | |
475 | * platform_device functions can simply call omap_device internal | |
476 | * functions to get device resources. Hacking around the existing | |
477 | * platform_device code wastes memory. Returns 0. | |
478 | */ | |
a2a28ad9 KH |
479 | static int omap_device_fill_resources(struct omap_device *od, |
480 | struct resource *res) | |
b04b65ab | 481 | { |
b04b65ab PW |
482 | int i, r; |
483 | ||
f39f4898 KVA |
484 | for (i = 0; i < od->hwmods_cnt; i++) { |
485 | r = omap_hwmod_fill_resources(od->hwmods[i], res); | |
b04b65ab | 486 | res += r; |
b04b65ab PW |
487 | } |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
a4f6cdb0 BC |
492 | /** |
493 | * omap_device_alloc - allocate an omap_device | |
494 | * @pdev: platform_device that will be included in this omap_device | |
495 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
496 | * @pdata: platform_data ptr to associate with the platform_device | |
497 | * @pdata_len: amount of memory pointed to by @pdata | |
498 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
499 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
500 | * | |
501 | * Convenience function for allocating an omap_device structure and filling | |
502 | * hwmods, resources and pm_latency attributes. | |
503 | * | |
504 | * Returns an struct omap_device pointer or ERR_PTR() on error; | |
505 | */ | |
993e4fbd | 506 | struct omap_device *omap_device_alloc(struct platform_device *pdev, |
a4f6cdb0 BC |
507 | struct omap_hwmod **ohs, int oh_cnt, |
508 | struct omap_device_pm_latency *pm_lats, | |
509 | int pm_lats_cnt) | |
510 | { | |
511 | int ret = -ENOMEM; | |
512 | struct omap_device *od; | |
513 | struct resource *res = NULL; | |
514 | int i, res_count; | |
515 | struct omap_hwmod **hwmods; | |
516 | ||
517 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); | |
518 | if (!od) { | |
519 | ret = -ENOMEM; | |
520 | goto oda_exit1; | |
521 | } | |
522 | od->hwmods_cnt = oh_cnt; | |
523 | ||
524 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
525 | if (!hwmods) | |
526 | goto oda_exit2; | |
527 | ||
528 | od->hwmods = hwmods; | |
529 | od->pdev = pdev; | |
530 | ||
531 | /* | |
532 | * HACK: Ideally the resources from DT should match, and hwmod | |
533 | * should just add the missing ones. Since the name is not | |
534 | * properly populated by DT, stick to hwmod resources only. | |
535 | */ | |
536 | if (pdev->num_resources && pdev->resource) | |
537 | dev_warn(&pdev->dev, "%s(): resources already allocated %d\n", | |
538 | __func__, pdev->num_resources); | |
539 | ||
540 | res_count = omap_device_count_resources(od); | |
541 | if (res_count > 0) { | |
542 | dev_dbg(&pdev->dev, "%s(): resources allocated from hwmod %d\n", | |
543 | __func__, res_count); | |
544 | res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL); | |
545 | if (!res) | |
546 | goto oda_exit3; | |
547 | ||
548 | omap_device_fill_resources(od, res); | |
549 | ||
550 | ret = platform_device_add_resources(pdev, res, res_count); | |
551 | kfree(res); | |
552 | ||
553 | if (ret) | |
554 | goto oda_exit3; | |
555 | } | |
556 | ||
557 | if (!pm_lats) { | |
558 | pm_lats = omap_default_latency; | |
559 | pm_lats_cnt = ARRAY_SIZE(omap_default_latency); | |
560 | } | |
561 | ||
562 | od->pm_lats_cnt = pm_lats_cnt; | |
563 | od->pm_lats = kmemdup(pm_lats, | |
564 | sizeof(struct omap_device_pm_latency) * pm_lats_cnt, | |
565 | GFP_KERNEL); | |
566 | if (!od->pm_lats) | |
567 | goto oda_exit3; | |
568 | ||
569 | pdev->archdata.od = od; | |
570 | ||
571 | for (i = 0; i < oh_cnt; i++) { | |
572 | hwmods[i]->od = od; | |
573 | _add_hwmod_clocks_clkdev(od, hwmods[i]); | |
574 | } | |
575 | ||
576 | return od; | |
577 | ||
578 | oda_exit3: | |
579 | kfree(hwmods); | |
580 | oda_exit2: | |
581 | kfree(od); | |
582 | oda_exit1: | |
583 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); | |
584 | ||
585 | return ERR_PTR(ret); | |
586 | } | |
587 | ||
993e4fbd | 588 | void omap_device_delete(struct omap_device *od) |
a4f6cdb0 | 589 | { |
dc2d07eb BC |
590 | if (!od) |
591 | return; | |
592 | ||
a4f6cdb0 BC |
593 | od->pdev->archdata.od = NULL; |
594 | kfree(od->pm_lats); | |
595 | kfree(od->hwmods); | |
596 | kfree(od); | |
597 | } | |
598 | ||
b04b65ab PW |
599 | /** |
600 | * omap_device_build - build and register an omap_device with one omap_hwmod | |
601 | * @pdev_name: name of the platform_device driver to use | |
602 | * @pdev_id: this platform_device's connection ID | |
603 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
604 | * @pdata: platform_data ptr to associate with the platform_device | |
605 | * @pdata_len: amount of memory pointed to by @pdata | |
606 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
607 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
c23a97d3 | 608 | * @is_early_device: should the device be registered as an early device or not |
b04b65ab PW |
609 | * |
610 | * Convenience function for building and registering a single | |
611 | * omap_device record, which in turn builds and registers a | |
612 | * platform_device record. See omap_device_build_ss() for more | |
613 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, | |
614 | * passes along the return value of omap_device_build_ss(). | |
615 | */ | |
9cf793f9 | 616 | struct platform_device __init *omap_device_build(const char *pdev_name, int pdev_id, |
b04b65ab PW |
617 | struct omap_hwmod *oh, void *pdata, |
618 | int pdata_len, | |
619 | struct omap_device_pm_latency *pm_lats, | |
c23a97d3 | 620 | int pm_lats_cnt, int is_early_device) |
b04b65ab PW |
621 | { |
622 | struct omap_hwmod *ohs[] = { oh }; | |
623 | ||
624 | if (!oh) | |
625 | return ERR_PTR(-EINVAL); | |
626 | ||
627 | return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata, | |
c23a97d3 TG |
628 | pdata_len, pm_lats, pm_lats_cnt, |
629 | is_early_device); | |
b04b65ab PW |
630 | } |
631 | ||
632 | /** | |
633 | * omap_device_build_ss - build and register an omap_device with multiple hwmods | |
634 | * @pdev_name: name of the platform_device driver to use | |
635 | * @pdev_id: this platform_device's connection ID | |
636 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
637 | * @pdata: platform_data ptr to associate with the platform_device | |
638 | * @pdata_len: amount of memory pointed to by @pdata | |
639 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
640 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
c23a97d3 | 641 | * @is_early_device: should the device be registered as an early device or not |
b04b65ab PW |
642 | * |
643 | * Convenience function for building and registering an omap_device | |
644 | * subsystem record. Subsystem records consist of multiple | |
645 | * omap_hwmods. This function in turn builds and registers a | |
646 | * platform_device record. Returns an ERR_PTR() on error, or passes | |
647 | * along the return value of omap_device_register(). | |
648 | */ | |
9cf793f9 | 649 | struct platform_device __init *omap_device_build_ss(const char *pdev_name, int pdev_id, |
b04b65ab PW |
650 | struct omap_hwmod **ohs, int oh_cnt, |
651 | void *pdata, int pdata_len, | |
652 | struct omap_device_pm_latency *pm_lats, | |
c23a97d3 | 653 | int pm_lats_cnt, int is_early_device) |
b04b65ab PW |
654 | { |
655 | int ret = -ENOMEM; | |
d66b3fe4 | 656 | struct platform_device *pdev; |
b04b65ab | 657 | struct omap_device *od; |
b04b65ab PW |
658 | |
659 | if (!ohs || oh_cnt == 0 || !pdev_name) | |
660 | return ERR_PTR(-EINVAL); | |
661 | ||
662 | if (!pdata && pdata_len > 0) | |
663 | return ERR_PTR(-EINVAL); | |
664 | ||
d66b3fe4 KH |
665 | pdev = platform_device_alloc(pdev_name, pdev_id); |
666 | if (!pdev) { | |
667 | ret = -ENOMEM; | |
668 | goto odbs_exit; | |
669 | } | |
670 | ||
a4f6cdb0 BC |
671 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
672 | if (pdev->id != -1) | |
673 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
674 | else | |
675 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
b04b65ab | 676 | |
a4f6cdb0 BC |
677 | od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt); |
678 | if (!od) | |
d66b3fe4 | 679 | goto odbs_exit1; |
d66b3fe4 KH |
680 | |
681 | ret = platform_device_add_data(pdev, pdata, pdata_len); | |
49b368a6 | 682 | if (ret) |
a4f6cdb0 | 683 | goto odbs_exit2; |
b04b65ab | 684 | |
c23a97d3 | 685 | if (is_early_device) |
d66b3fe4 | 686 | ret = omap_early_device_register(pdev); |
c23a97d3 | 687 | else |
d66b3fe4 KH |
688 | ret = omap_device_register(pdev); |
689 | if (ret) | |
a4f6cdb0 | 690 | goto odbs_exit2; |
06563581 | 691 | |
d66b3fe4 | 692 | return pdev; |
b04b65ab | 693 | |
d66b3fe4 | 694 | odbs_exit2: |
a4f6cdb0 | 695 | omap_device_delete(od); |
d66b3fe4 KH |
696 | odbs_exit1: |
697 | platform_device_put(pdev); | |
698 | odbs_exit: | |
b04b65ab PW |
699 | |
700 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); | |
701 | ||
702 | return ERR_PTR(ret); | |
703 | } | |
704 | ||
c23a97d3 TG |
705 | /** |
706 | * omap_early_device_register - register an omap_device as an early platform | |
707 | * device. | |
708 | * @od: struct omap_device * to register | |
709 | * | |
710 | * Register the omap_device structure. This currently just calls | |
711 | * platform_early_add_device() on the underlying platform_device. | |
712 | * Returns 0 by default. | |
713 | */ | |
9cf793f9 | 714 | static int __init omap_early_device_register(struct platform_device *pdev) |
c23a97d3 TG |
715 | { |
716 | struct platform_device *devices[1]; | |
717 | ||
bfae4f8f | 718 | devices[0] = pdev; |
c23a97d3 TG |
719 | early_platform_add_devices(devices, 1); |
720 | return 0; | |
721 | } | |
722 | ||
256a5435 | 723 | #ifdef CONFIG_PM_RUNTIME |
638080c3 KH |
724 | static int _od_runtime_suspend(struct device *dev) |
725 | { | |
726 | struct platform_device *pdev = to_platform_device(dev); | |
345f79b3 | 727 | int ret; |
638080c3 | 728 | |
345f79b3 KH |
729 | ret = pm_generic_runtime_suspend(dev); |
730 | ||
731 | if (!ret) | |
732 | omap_device_idle(pdev); | |
733 | ||
734 | return ret; | |
735 | } | |
736 | ||
737 | static int _od_runtime_idle(struct device *dev) | |
738 | { | |
739 | return pm_generic_runtime_idle(dev); | |
638080c3 KH |
740 | } |
741 | ||
742 | static int _od_runtime_resume(struct device *dev) | |
743 | { | |
744 | struct platform_device *pdev = to_platform_device(dev); | |
745 | ||
345f79b3 KH |
746 | omap_device_enable(pdev); |
747 | ||
748 | return pm_generic_runtime_resume(dev); | |
638080c3 | 749 | } |
256a5435 | 750 | #endif |
638080c3 | 751 | |
c03f007a KH |
752 | #ifdef CONFIG_SUSPEND |
753 | static int _od_suspend_noirq(struct device *dev) | |
754 | { | |
755 | struct platform_device *pdev = to_platform_device(dev); | |
756 | struct omap_device *od = to_omap_device(pdev); | |
757 | int ret; | |
758 | ||
72bb6f9b KH |
759 | /* Don't attempt late suspend on a driver that is not bound */ |
760 | if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) | |
761 | return 0; | |
762 | ||
c03f007a KH |
763 | ret = pm_generic_suspend_noirq(dev); |
764 | ||
765 | if (!ret && !pm_runtime_status_suspended(dev)) { | |
766 | if (pm_generic_runtime_suspend(dev) == 0) { | |
b7c39a3f PW |
767 | if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)) |
768 | omap_device_idle(pdev); | |
c03f007a KH |
769 | od->flags |= OMAP_DEVICE_SUSPENDED; |
770 | } | |
771 | } | |
772 | ||
773 | return ret; | |
774 | } | |
775 | ||
776 | static int _od_resume_noirq(struct device *dev) | |
777 | { | |
778 | struct platform_device *pdev = to_platform_device(dev); | |
779 | struct omap_device *od = to_omap_device(pdev); | |
780 | ||
781 | if ((od->flags & OMAP_DEVICE_SUSPENDED) && | |
782 | !pm_runtime_status_suspended(dev)) { | |
783 | od->flags &= ~OMAP_DEVICE_SUSPENDED; | |
b7c39a3f PW |
784 | if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)) |
785 | omap_device_enable(pdev); | |
c03f007a KH |
786 | pm_generic_runtime_resume(dev); |
787 | } | |
788 | ||
789 | return pm_generic_resume_noirq(dev); | |
790 | } | |
126caf13 KH |
791 | #else |
792 | #define _od_suspend_noirq NULL | |
793 | #define _od_resume_noirq NULL | |
c03f007a KH |
794 | #endif |
795 | ||
3ec2decb | 796 | struct dev_pm_domain omap_device_pm_domain = { |
638080c3 | 797 | .ops = { |
256a5435 KH |
798 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
799 | _od_runtime_idle) | |
638080c3 | 800 | USE_PLATFORM_PM_SLEEP_OPS |
ff35336d KH |
801 | .suspend_noirq = _od_suspend_noirq, |
802 | .resume_noirq = _od_resume_noirq, | |
638080c3 KH |
803 | } |
804 | }; | |
805 | ||
b04b65ab PW |
806 | /** |
807 | * omap_device_register - register an omap_device with one omap_hwmod | |
808 | * @od: struct omap_device * to register | |
809 | * | |
810 | * Register the omap_device structure. This currently just calls | |
811 | * platform_device_register() on the underlying platform_device. | |
812 | * Returns the return value of platform_device_register(). | |
813 | */ | |
993e4fbd | 814 | int omap_device_register(struct platform_device *pdev) |
b04b65ab | 815 | { |
bfae4f8f | 816 | pr_debug("omap_device: %s: registering\n", pdev->name); |
b04b65ab | 817 | |
bfae4f8f | 818 | pdev->dev.pm_domain = &omap_device_pm_domain; |
d66b3fe4 | 819 | return platform_device_add(pdev); |
b04b65ab PW |
820 | } |
821 | ||
822 | ||
823 | /* Public functions for use by device drivers through struct platform_data */ | |
824 | ||
825 | /** | |
826 | * omap_device_enable - fully activate an omap_device | |
827 | * @od: struct omap_device * to activate | |
828 | * | |
829 | * Do whatever is necessary for the hwmods underlying omap_device @od | |
830 | * to be accessible and ready to operate. This generally involves | |
831 | * enabling clocks, setting SYSCONFIG registers; and in the future may | |
832 | * involve remuxing pins. Device drivers should call this function | |
833 | * (through platform_data function pointers) where they would normally | |
834 | * enable clocks, etc. Returns -EINVAL if called when the omap_device | |
835 | * is already enabled, or passes along the return value of | |
836 | * _omap_device_activate(). | |
837 | */ | |
838 | int omap_device_enable(struct platform_device *pdev) | |
839 | { | |
840 | int ret; | |
841 | struct omap_device *od; | |
842 | ||
8f0d69de | 843 | od = to_omap_device(pdev); |
b04b65ab PW |
844 | |
845 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
846 | dev_warn(&pdev->dev, |
847 | "omap_device: %s() called from invalid state %d\n", | |
848 | __func__, od->_state); | |
b04b65ab PW |
849 | return -EINVAL; |
850 | } | |
851 | ||
852 | /* Enable everything if we're enabling this device from scratch */ | |
853 | if (od->_state == OMAP_DEVICE_STATE_UNKNOWN) | |
854 | od->pm_lat_level = od->pm_lats_cnt; | |
855 | ||
856 | ret = _omap_device_activate(od, IGNORE_WAKEUP_LAT); | |
857 | ||
858 | od->dev_wakeup_lat = 0; | |
5f1b6ef7 | 859 | od->_dev_wakeup_lat_limit = UINT_MAX; |
b04b65ab PW |
860 | od->_state = OMAP_DEVICE_STATE_ENABLED; |
861 | ||
862 | return ret; | |
863 | } | |
864 | ||
865 | /** | |
866 | * omap_device_idle - idle an omap_device | |
867 | * @od: struct omap_device * to idle | |
868 | * | |
869 | * Idle omap_device @od by calling as many .deactivate_func() entries | |
870 | * in the omap_device's pm_lats table as is possible without exceeding | |
871 | * the device's maximum wakeup latency limit, pm_lat_limit. Device | |
872 | * drivers should call this function (through platform_data function | |
873 | * pointers) where they would normally disable clocks after operations | |
874 | * complete, etc.. Returns -EINVAL if the omap_device is not | |
875 | * currently enabled, or passes along the return value of | |
876 | * _omap_device_deactivate(). | |
877 | */ | |
878 | int omap_device_idle(struct platform_device *pdev) | |
879 | { | |
880 | int ret; | |
881 | struct omap_device *od; | |
882 | ||
8f0d69de | 883 | od = to_omap_device(pdev); |
b04b65ab PW |
884 | |
885 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
886 | dev_warn(&pdev->dev, |
887 | "omap_device: %s() called from invalid state %d\n", | |
888 | __func__, od->_state); | |
b04b65ab PW |
889 | return -EINVAL; |
890 | } | |
891 | ||
892 | ret = _omap_device_deactivate(od, USE_WAKEUP_LAT); | |
893 | ||
894 | od->_state = OMAP_DEVICE_STATE_IDLE; | |
895 | ||
896 | return ret; | |
897 | } | |
898 | ||
899 | /** | |
900 | * omap_device_shutdown - shut down an omap_device | |
901 | * @od: struct omap_device * to shut down | |
902 | * | |
903 | * Shut down omap_device @od by calling all .deactivate_func() entries | |
904 | * in the omap_device's pm_lats table and then shutting down all of | |
905 | * the underlying omap_hwmods. Used when a device is being "removed" | |
906 | * or a device driver is being unloaded. Returns -EINVAL if the | |
907 | * omap_device is not currently enabled or idle, or passes along the | |
908 | * return value of _omap_device_deactivate(). | |
909 | */ | |
910 | int omap_device_shutdown(struct platform_device *pdev) | |
911 | { | |
912 | int ret, i; | |
913 | struct omap_device *od; | |
b04b65ab | 914 | |
8f0d69de | 915 | od = to_omap_device(pdev); |
b04b65ab PW |
916 | |
917 | if (od->_state != OMAP_DEVICE_STATE_ENABLED && | |
918 | od->_state != OMAP_DEVICE_STATE_IDLE) { | |
49882c99 KH |
919 | dev_warn(&pdev->dev, |
920 | "omap_device: %s() called from invalid state %d\n", | |
921 | __func__, od->_state); | |
b04b65ab PW |
922 | return -EINVAL; |
923 | } | |
924 | ||
925 | ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT); | |
926 | ||
f39f4898 KVA |
927 | for (i = 0; i < od->hwmods_cnt; i++) |
928 | omap_hwmod_shutdown(od->hwmods[i]); | |
b04b65ab PW |
929 | |
930 | od->_state = OMAP_DEVICE_STATE_SHUTDOWN; | |
931 | ||
932 | return ret; | |
933 | } | |
934 | ||
935 | /** | |
936 | * omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim | |
937 | * @od: struct omap_device * | |
938 | * | |
939 | * When a device's maximum wakeup latency limit changes, call some of | |
940 | * the .activate_func or .deactivate_func function pointers in the | |
941 | * omap_device's pm_lats array to ensure that the device's maximum | |
942 | * wakeup latency is less than or equal to the new latency limit. | |
943 | * Intended to be called by OMAP PM code whenever a device's maximum | |
944 | * wakeup latency limit changes (e.g., via | |
945 | * omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be | |
946 | * done (e.g., if the omap_device is not currently idle, or if the | |
947 | * wakeup latency is already current with the new limit) or passes | |
948 | * along the return value of _omap_device_deactivate() or | |
949 | * _omap_device_activate(). | |
950 | */ | |
951 | int omap_device_align_pm_lat(struct platform_device *pdev, | |
952 | u32 new_wakeup_lat_limit) | |
953 | { | |
954 | int ret = -EINVAL; | |
955 | struct omap_device *od; | |
956 | ||
8f0d69de | 957 | od = to_omap_device(pdev); |
b04b65ab PW |
958 | |
959 | if (new_wakeup_lat_limit == od->dev_wakeup_lat) | |
960 | return 0; | |
961 | ||
962 | od->_dev_wakeup_lat_limit = new_wakeup_lat_limit; | |
963 | ||
964 | if (od->_state != OMAP_DEVICE_STATE_IDLE) | |
965 | return 0; | |
966 | else if (new_wakeup_lat_limit > od->dev_wakeup_lat) | |
967 | ret = _omap_device_deactivate(od, USE_WAKEUP_LAT); | |
968 | else if (new_wakeup_lat_limit < od->dev_wakeup_lat) | |
969 | ret = _omap_device_activate(od, USE_WAKEUP_LAT); | |
970 | ||
971 | return ret; | |
972 | } | |
973 | ||
974 | /** | |
975 | * omap_device_get_pwrdm - return the powerdomain * associated with @od | |
976 | * @od: struct omap_device * | |
977 | * | |
978 | * Return the powerdomain associated with the first underlying | |
979 | * omap_hwmod for this omap_device. Intended for use by core OMAP PM | |
980 | * code. Returns NULL on error or a struct powerdomain * upon | |
981 | * success. | |
982 | */ | |
983 | struct powerdomain *omap_device_get_pwrdm(struct omap_device *od) | |
984 | { | |
985 | /* | |
986 | * XXX Assumes that all omap_hwmod powerdomains are identical. | |
987 | * This may not necessarily be true. There should be a sanity | |
988 | * check in here to WARN() if any difference appears. | |
989 | */ | |
990 | if (!od->hwmods_cnt) | |
991 | return NULL; | |
992 | ||
993 | return omap_hwmod_get_pwrdm(od->hwmods[0]); | |
994 | } | |
995 | ||
db2a60bf PW |
996 | /** |
997 | * omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base | |
998 | * @od: struct omap_device * | |
999 | * | |
1000 | * Return the MPU's virtual address for the base of the hwmod, from | |
1001 | * the ioremap() that the hwmod code does. Only valid if there is one | |
1002 | * hwmod associated with this device. Returns NULL if there are zero | |
1003 | * or more than one hwmods associated with this omap_device; | |
1004 | * otherwise, passes along the return value from | |
1005 | * omap_hwmod_get_mpu_rt_va(). | |
1006 | */ | |
1007 | void __iomem *omap_device_get_rt_va(struct omap_device *od) | |
1008 | { | |
1009 | if (od->hwmods_cnt != 1) | |
1010 | return NULL; | |
1011 | ||
1012 | return omap_hwmod_get_mpu_rt_va(od->hwmods[0]); | |
1013 | } | |
1014 | ||
1f8a7d52 NM |
1015 | /** |
1016 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | |
1017 | * device pointer. | |
1018 | * @oh_name: name of the hwmod device | |
1019 | * | |
1020 | * Returns back a struct device * pointer associated with a hwmod | |
1021 | * device represented by a hwmod_name | |
1022 | */ | |
1023 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | |
1024 | { | |
1025 | struct omap_hwmod *oh; | |
1026 | ||
1027 | if (!oh_name) { | |
1028 | WARN(1, "%s: no hwmod name!\n", __func__); | |
1029 | return ERR_PTR(-EINVAL); | |
1030 | } | |
1031 | ||
1032 | oh = omap_hwmod_lookup(oh_name); | |
1033 | if (IS_ERR_OR_NULL(oh)) { | |
1034 | WARN(1, "%s: no hwmod for %s\n", __func__, | |
1035 | oh_name); | |
1036 | return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV); | |
1037 | } | |
1038 | if (IS_ERR_OR_NULL(oh->od)) { | |
1039 | WARN(1, "%s: no omap_device for %s\n", __func__, | |
1040 | oh_name); | |
1041 | return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV); | |
1042 | } | |
1043 | ||
1044 | if (IS_ERR_OR_NULL(oh->od->pdev)) | |
1045 | return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV); | |
1046 | ||
1047 | return &oh->od->pdev->dev; | |
1048 | } | |
1049 | EXPORT_SYMBOL(omap_device_get_by_hwmod_name); | |
1050 | ||
b04b65ab PW |
1051 | /* |
1052 | * Public functions intended for use in omap_device_pm_latency | |
1053 | * .activate_func and .deactivate_func function pointers | |
1054 | */ | |
1055 | ||
1056 | /** | |
1057 | * omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods | |
1058 | * @od: struct omap_device *od | |
1059 | * | |
1060 | * Enable all underlying hwmods. Returns 0. | |
1061 | */ | |
1062 | int omap_device_enable_hwmods(struct omap_device *od) | |
1063 | { | |
b04b65ab PW |
1064 | int i; |
1065 | ||
f39f4898 KVA |
1066 | for (i = 0; i < od->hwmods_cnt; i++) |
1067 | omap_hwmod_enable(od->hwmods[i]); | |
b04b65ab PW |
1068 | |
1069 | /* XXX pass along return value here? */ | |
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | /** | |
1074 | * omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods | |
1075 | * @od: struct omap_device *od | |
1076 | * | |
1077 | * Idle all underlying hwmods. Returns 0. | |
1078 | */ | |
1079 | int omap_device_idle_hwmods(struct omap_device *od) | |
1080 | { | |
b04b65ab PW |
1081 | int i; |
1082 | ||
f39f4898 KVA |
1083 | for (i = 0; i < od->hwmods_cnt; i++) |
1084 | omap_hwmod_idle(od->hwmods[i]); | |
b04b65ab PW |
1085 | |
1086 | /* XXX pass along return value here? */ | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | /** | |
1091 | * omap_device_disable_clocks - disable all main and interface clocks | |
1092 | * @od: struct omap_device *od | |
1093 | * | |
1094 | * Disable the main functional clock and interface clock for all of the | |
1095 | * omap_hwmods associated with the omap_device. Returns 0. | |
1096 | */ | |
1097 | int omap_device_disable_clocks(struct omap_device *od) | |
1098 | { | |
b04b65ab PW |
1099 | int i; |
1100 | ||
f39f4898 KVA |
1101 | for (i = 0; i < od->hwmods_cnt; i++) |
1102 | omap_hwmod_disable_clocks(od->hwmods[i]); | |
b04b65ab PW |
1103 | |
1104 | /* XXX pass along return value here? */ | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * omap_device_enable_clocks - enable all main and interface clocks | |
1110 | * @od: struct omap_device *od | |
1111 | * | |
1112 | * Enable the main functional clock and interface clock for all of the | |
1113 | * omap_hwmods associated with the omap_device. Returns 0. | |
1114 | */ | |
1115 | int omap_device_enable_clocks(struct omap_device *od) | |
1116 | { | |
b04b65ab PW |
1117 | int i; |
1118 | ||
f39f4898 KVA |
1119 | for (i = 0; i < od->hwmods_cnt; i++) |
1120 | omap_hwmod_enable_clocks(od->hwmods[i]); | |
b04b65ab PW |
1121 | |
1122 | /* XXX pass along return value here? */ | |
1123 | return 0; | |
1124 | } | |
0d5e8252 | 1125 | |
dc2d07eb BC |
1126 | static struct notifier_block platform_nb = { |
1127 | .notifier_call = _omap_device_notifier_call, | |
1128 | }; | |
1129 | ||
0d5e8252 KH |
1130 | static int __init omap_device_init(void) |
1131 | { | |
dc2d07eb | 1132 | bus_register_notifier(&platform_bus_type, &platform_nb); |
3ec2decb | 1133 | return 0; |
0d5e8252 KH |
1134 | } |
1135 | core_initcall(omap_device_init); |