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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> | |
55581415 | 81 | #include <linux/export.h> |
b04b65ab | 82 | #include <linux/platform_device.h> |
5a0e3ad6 | 83 | #include <linux/slab.h> |
b04b65ab PW |
84 | #include <linux/err.h> |
85 | #include <linux/io.h> | |
4ef7aca8 | 86 | #include <linux/clk.h> |
da0653fe | 87 | #include <linux/clkdev.h> |
345f79b3 | 88 | #include <linux/pm_runtime.h> |
dc2d07eb BC |
89 | #include <linux/of.h> |
90 | #include <linux/notifier.h> | |
b04b65ab | 91 | |
ce491cf8 TL |
92 | #include <plat/omap_device.h> |
93 | #include <plat/omap_hwmod.h> | |
da0653fe | 94 | #include <plat/clock.h> |
b04b65ab PW |
95 | |
96 | /* These parameters are passed to _omap_device_{de,}activate() */ | |
97 | #define USE_WAKEUP_LAT 0 | |
98 | #define IGNORE_WAKEUP_LAT 1 | |
99 | ||
bfae4f8f | 100 | static int omap_early_device_register(struct platform_device *pdev); |
a2a28ad9 | 101 | |
b7b5bc91 BC |
102 | static struct omap_device_pm_latency omap_default_latency[] = { |
103 | { | |
104 | .deactivate_func = omap_device_idle_hwmods, | |
105 | .activate_func = omap_device_enable_hwmods, | |
106 | .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, | |
107 | } | |
108 | }; | |
109 | ||
b04b65ab PW |
110 | /* Private functions */ |
111 | ||
b04b65ab PW |
112 | /** |
113 | * _omap_device_activate - increase device readiness | |
114 | * @od: struct omap_device * | |
115 | * @ignore_lat: increase to latency target (0) or full readiness (1)? | |
116 | * | |
117 | * Increase readiness of omap_device @od (thus decreasing device | |
118 | * wakeup latency, but consuming more power). If @ignore_lat is | |
119 | * IGNORE_WAKEUP_LAT, make the omap_device fully active. Otherwise, | |
120 | * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup | |
121 | * latency is greater than the requested maximum wakeup latency, step | |
122 | * backwards in the omap_device_pm_latency table to ensure the | |
123 | * device's maximum wakeup latency is less than or equal to the | |
124 | * requested maximum wakeup latency. Returns 0. | |
125 | */ | |
126 | static int _omap_device_activate(struct omap_device *od, u8 ignore_lat) | |
127 | { | |
f059429e | 128 | struct timespec a, b, c; |
b04b65ab | 129 | |
d66b3fe4 | 130 | dev_dbg(&od->pdev->dev, "omap_device: activating\n"); |
b04b65ab PW |
131 | |
132 | while (od->pm_lat_level > 0) { | |
133 | struct omap_device_pm_latency *odpl; | |
f059429e | 134 | unsigned long long act_lat = 0; |
b04b65ab PW |
135 | |
136 | od->pm_lat_level--; | |
137 | ||
138 | odpl = od->pm_lats + od->pm_lat_level; | |
139 | ||
140 | if (!ignore_lat && | |
141 | (od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit)) | |
142 | break; | |
143 | ||
d2292667 | 144 | read_persistent_clock(&a); |
b04b65ab PW |
145 | |
146 | /* XXX check return code */ | |
147 | odpl->activate_func(od); | |
148 | ||
d2292667 | 149 | read_persistent_clock(&b); |
b04b65ab | 150 | |
f059429e | 151 | c = timespec_sub(b, a); |
0d93d8bb | 152 | act_lat = timespec_to_ns(&c); |
b04b65ab | 153 | |
d66b3fe4 | 154 | dev_dbg(&od->pdev->dev, |
7852ec05 PW |
155 | "omap_device: pm_lat %d: activate: elapsed time %llu nsec\n", |
156 | od->pm_lat_level, act_lat); | |
b04b65ab | 157 | |
9799aca2 KH |
158 | if (act_lat > odpl->activate_lat) { |
159 | odpl->activate_lat_worst = act_lat; | |
160 | if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) { | |
161 | odpl->activate_lat = act_lat; | |
d66b3fe4 | 162 | dev_dbg(&od->pdev->dev, |
7852ec05 | 163 | "new worst case activate latency %d: %llu\n", |
47c3e5d8 | 164 | od->pm_lat_level, act_lat); |
9799aca2 | 165 | } else |
d66b3fe4 | 166 | dev_warn(&od->pdev->dev, |
7852ec05 | 167 | "activate latency %d higher than expected. (%llu > %d)\n", |
49882c99 KH |
168 | od->pm_lat_level, act_lat, |
169 | odpl->activate_lat); | |
9799aca2 | 170 | } |
b04b65ab PW |
171 | |
172 | od->dev_wakeup_lat -= odpl->activate_lat; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | /** | |
179 | * _omap_device_deactivate - decrease device readiness | |
180 | * @od: struct omap_device * | |
181 | * @ignore_lat: decrease to latency target (0) or full inactivity (1)? | |
182 | * | |
183 | * Decrease readiness of omap_device @od (thus increasing device | |
184 | * wakeup latency, but conserving power). If @ignore_lat is | |
185 | * IGNORE_WAKEUP_LAT, make the omap_device fully inactive. Otherwise, | |
186 | * if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup | |
187 | * latency is less than the requested maximum wakeup latency, step | |
188 | * forwards in the omap_device_pm_latency table to ensure the device's | |
189 | * maximum wakeup latency is less than or equal to the requested | |
190 | * maximum wakeup latency. Returns 0. | |
191 | */ | |
192 | static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat) | |
193 | { | |
f059429e | 194 | struct timespec a, b, c; |
b04b65ab | 195 | |
d66b3fe4 | 196 | dev_dbg(&od->pdev->dev, "omap_device: deactivating\n"); |
b04b65ab PW |
197 | |
198 | while (od->pm_lat_level < od->pm_lats_cnt) { | |
199 | struct omap_device_pm_latency *odpl; | |
f059429e | 200 | unsigned long long deact_lat = 0; |
b04b65ab PW |
201 | |
202 | odpl = od->pm_lats + od->pm_lat_level; | |
203 | ||
204 | if (!ignore_lat && | |
205 | ((od->dev_wakeup_lat + odpl->activate_lat) > | |
206 | od->_dev_wakeup_lat_limit)) | |
207 | break; | |
208 | ||
d2292667 | 209 | read_persistent_clock(&a); |
b04b65ab PW |
210 | |
211 | /* XXX check return code */ | |
212 | odpl->deactivate_func(od); | |
213 | ||
d2292667 | 214 | read_persistent_clock(&b); |
b04b65ab | 215 | |
f059429e | 216 | c = timespec_sub(b, a); |
0d93d8bb | 217 | deact_lat = timespec_to_ns(&c); |
b04b65ab | 218 | |
d66b3fe4 | 219 | dev_dbg(&od->pdev->dev, |
7852ec05 PW |
220 | "omap_device: pm_lat %d: deactivate: elapsed time %llu nsec\n", |
221 | od->pm_lat_level, deact_lat); | |
b04b65ab | 222 | |
9799aca2 KH |
223 | if (deact_lat > odpl->deactivate_lat) { |
224 | odpl->deactivate_lat_worst = deact_lat; | |
225 | if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) { | |
226 | odpl->deactivate_lat = deact_lat; | |
d66b3fe4 | 227 | dev_dbg(&od->pdev->dev, |
7852ec05 | 228 | "new worst case deactivate latency %d: %llu\n", |
47c3e5d8 | 229 | od->pm_lat_level, deact_lat); |
9799aca2 | 230 | } else |
d66b3fe4 | 231 | dev_warn(&od->pdev->dev, |
7852ec05 | 232 | "deactivate latency %d higher than expected. (%llu > %d)\n", |
49882c99 KH |
233 | od->pm_lat_level, deact_lat, |
234 | odpl->deactivate_lat); | |
9799aca2 KH |
235 | } |
236 | ||
b04b65ab PW |
237 | od->dev_wakeup_lat += odpl->activate_lat; |
238 | ||
239 | od->pm_lat_level++; | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
bf1e0776 BC |
245 | static void _add_clkdev(struct omap_device *od, const char *clk_alias, |
246 | const char *clk_name) | |
247 | { | |
248 | struct clk *r; | |
249 | struct clk_lookup *l; | |
250 | ||
251 | if (!clk_alias || !clk_name) | |
252 | return; | |
253 | ||
d66b3fe4 | 254 | dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name); |
bf1e0776 | 255 | |
d66b3fe4 | 256 | r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias); |
bf1e0776 | 257 | if (!IS_ERR(r)) { |
d66b3fe4 | 258 | dev_warn(&od->pdev->dev, |
49882c99 | 259 | "alias %s already exists\n", clk_alias); |
bf1e0776 BC |
260 | clk_put(r); |
261 | return; | |
262 | } | |
263 | ||
6ea74cb9 | 264 | r = clk_get(NULL, clk_name); |
bf1e0776 | 265 | if (IS_ERR(r)) { |
d66b3fe4 | 266 | dev_err(&od->pdev->dev, |
6ea74cb9 | 267 | "clk_get for %s failed\n", clk_name); |
bf1e0776 BC |
268 | return; |
269 | } | |
270 | ||
d66b3fe4 | 271 | l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev)); |
bf1e0776 | 272 | if (!l) { |
d66b3fe4 | 273 | dev_err(&od->pdev->dev, |
49882c99 | 274 | "clkdev_alloc for %s failed\n", clk_alias); |
bf1e0776 BC |
275 | return; |
276 | } | |
277 | ||
278 | clkdev_add(l); | |
279 | } | |
280 | ||
4ef7aca8 | 281 | /** |
bf1e0776 BC |
282 | * _add_hwmod_clocks_clkdev - Add clkdev entry for hwmod optional clocks |
283 | * and main clock | |
4ef7aca8 | 284 | * @od: struct omap_device *od |
bf1e0776 | 285 | * @oh: struct omap_hwmod *oh |
4ef7aca8 | 286 | * |
bf1e0776 BC |
287 | * For the main clock and every optional clock present per hwmod per |
288 | * omap_device, this function adds an entry in the clkdev table of the | |
289 | * form <dev-id=dev_name, con-id=role> if it does not exist already. | |
4ef7aca8 PB |
290 | * |
291 | * The function is called from inside omap_device_build_ss(), after | |
292 | * omap_device_register. | |
293 | * | |
294 | * This allows drivers to get a pointer to its optional clocks based on its role | |
295 | * by calling clk_get(<dev*>, <role>). | |
bf1e0776 | 296 | * In the case of the main clock, a "fck" alias is used. |
4ef7aca8 PB |
297 | * |
298 | * No return value. | |
299 | */ | |
bf1e0776 BC |
300 | static void _add_hwmod_clocks_clkdev(struct omap_device *od, |
301 | struct omap_hwmod *oh) | |
4ef7aca8 PB |
302 | { |
303 | int i; | |
304 | ||
bf1e0776 | 305 | _add_clkdev(od, "fck", oh->main_clk); |
da0653fe | 306 | |
bf1e0776 BC |
307 | for (i = 0; i < oh->opt_clks_cnt; i++) |
308 | _add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk); | |
4ef7aca8 PB |
309 | } |
310 | ||
b04b65ab | 311 | |
dc2d07eb BC |
312 | /** |
313 | * omap_device_build_from_dt - build an omap_device with multiple hwmods | |
314 | * @pdev_name: name of the platform_device driver to use | |
315 | * @pdev_id: this platform_device's connection ID | |
316 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
317 | * @pdata: platform_data ptr to associate with the platform_device | |
318 | * @pdata_len: amount of memory pointed to by @pdata | |
319 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
320 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
321 | * @is_early_device: should the device be registered as an early device or not | |
322 | * | |
323 | * Function for building an omap_device already registered from device-tree | |
324 | * | |
325 | * Returns 0 or PTR_ERR() on error. | |
326 | */ | |
327 | static int omap_device_build_from_dt(struct platform_device *pdev) | |
328 | { | |
329 | struct omap_hwmod **hwmods; | |
330 | struct omap_device *od; | |
331 | struct omap_hwmod *oh; | |
332 | struct device_node *node = pdev->dev.of_node; | |
333 | const char *oh_name; | |
334 | int oh_cnt, i, ret = 0; | |
335 | ||
336 | oh_cnt = of_property_count_strings(node, "ti,hwmods"); | |
337 | if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) { | |
5dc06b7e | 338 | dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n"); |
dc2d07eb BC |
339 | return -ENODEV; |
340 | } | |
341 | ||
342 | hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
343 | if (!hwmods) { | |
344 | ret = -ENOMEM; | |
345 | goto odbfd_exit; | |
346 | } | |
347 | ||
348 | for (i = 0; i < oh_cnt; i++) { | |
349 | of_property_read_string_index(node, "ti,hwmods", i, &oh_name); | |
350 | oh = omap_hwmod_lookup(oh_name); | |
351 | if (!oh) { | |
352 | dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n", | |
353 | oh_name); | |
354 | ret = -EINVAL; | |
355 | goto odbfd_exit1; | |
356 | } | |
357 | hwmods[i] = oh; | |
358 | } | |
359 | ||
360 | od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0); | |
361 | if (!od) { | |
362 | dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n", | |
363 | oh_name); | |
364 | ret = PTR_ERR(od); | |
365 | goto odbfd_exit1; | |
366 | } | |
367 | ||
368 | if (of_get_property(node, "ti,no_idle_on_suspend", NULL)) | |
369 | omap_device_disable_idle_on_suspend(pdev); | |
370 | ||
371 | pdev->dev.pm_domain = &omap_device_pm_domain; | |
372 | ||
373 | odbfd_exit1: | |
374 | kfree(hwmods); | |
375 | odbfd_exit: | |
376 | return ret; | |
377 | } | |
378 | ||
379 | static int _omap_device_notifier_call(struct notifier_block *nb, | |
380 | unsigned long event, void *dev) | |
381 | { | |
382 | struct platform_device *pdev = to_platform_device(dev); | |
383 | ||
384 | switch (event) { | |
385 | case BUS_NOTIFY_ADD_DEVICE: | |
386 | if (pdev->dev.of_node) | |
387 | omap_device_build_from_dt(pdev); | |
388 | break; | |
389 | ||
390 | case BUS_NOTIFY_DEL_DEVICE: | |
391 | if (pdev->archdata.od) | |
392 | omap_device_delete(pdev->archdata.od); | |
393 | break; | |
394 | } | |
395 | ||
396 | return NOTIFY_DONE; | |
397 | } | |
398 | ||
399 | ||
b04b65ab PW |
400 | /* Public functions for use by core code */ |
401 | ||
c80705aa KH |
402 | /** |
403 | * omap_device_get_context_loss_count - get lost context count | |
404 | * @od: struct omap_device * | |
405 | * | |
406 | * Using the primary hwmod, query the context loss count for this | |
407 | * device. | |
408 | * | |
409 | * Callers should consider context for this device lost any time this | |
410 | * function returns a value different than the value the caller got | |
411 | * the last time it called this function. | |
412 | * | |
413 | * If any hwmods exist for the omap_device assoiated with @pdev, | |
414 | * return the context loss counter for that hwmod, otherwise return | |
415 | * zero. | |
416 | */ | |
fc013873 | 417 | int omap_device_get_context_loss_count(struct platform_device *pdev) |
c80705aa KH |
418 | { |
419 | struct omap_device *od; | |
420 | u32 ret = 0; | |
421 | ||
8f0d69de | 422 | od = to_omap_device(pdev); |
c80705aa KH |
423 | |
424 | if (od->hwmods_cnt) | |
425 | ret = omap_hwmod_get_context_loss_count(od->hwmods[0]); | |
426 | ||
427 | return ret; | |
428 | } | |
429 | ||
b04b65ab PW |
430 | /** |
431 | * omap_device_count_resources - count number of struct resource entries needed | |
432 | * @od: struct omap_device * | |
433 | * | |
434 | * Count the number of struct resource entries needed for this | |
435 | * omap_device @od. Used by omap_device_build_ss() to determine how | |
436 | * much memory to allocate before calling | |
437 | * omap_device_fill_resources(). Returns the count. | |
438 | */ | |
a2a28ad9 | 439 | static int omap_device_count_resources(struct omap_device *od) |
b04b65ab | 440 | { |
b04b65ab PW |
441 | int c = 0; |
442 | int i; | |
443 | ||
f39f4898 KVA |
444 | for (i = 0; i < od->hwmods_cnt; i++) |
445 | c += omap_hwmod_count_resources(od->hwmods[i]); | |
b04b65ab | 446 | |
7852ec05 PW |
447 | pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n", |
448 | od->pdev->name, c, od->hwmods_cnt); | |
b04b65ab PW |
449 | |
450 | return c; | |
451 | } | |
452 | ||
453 | /** | |
454 | * omap_device_fill_resources - fill in array of struct resource | |
455 | * @od: struct omap_device * | |
456 | * @res: pointer to an array of struct resource to be filled in | |
457 | * | |
458 | * Populate one or more empty struct resource pointed to by @res with | |
459 | * the resource data for this omap_device @od. Used by | |
460 | * omap_device_build_ss() after calling omap_device_count_resources(). | |
461 | * Ideally this function would not be needed at all. If omap_device | |
462 | * replaces platform_device, then we can specify our own | |
463 | * get_resource()/ get_irq()/etc functions that use the underlying | |
464 | * omap_hwmod information. Or if platform_device is extended to use | |
465 | * subarchitecture-specific function pointers, the various | |
466 | * platform_device functions can simply call omap_device internal | |
467 | * functions to get device resources. Hacking around the existing | |
468 | * platform_device code wastes memory. Returns 0. | |
469 | */ | |
a2a28ad9 KH |
470 | static int omap_device_fill_resources(struct omap_device *od, |
471 | struct resource *res) | |
b04b65ab | 472 | { |
b04b65ab PW |
473 | int i, r; |
474 | ||
f39f4898 KVA |
475 | for (i = 0; i < od->hwmods_cnt; i++) { |
476 | r = omap_hwmod_fill_resources(od->hwmods[i], res); | |
b04b65ab | 477 | res += r; |
b04b65ab PW |
478 | } |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
a4f6cdb0 BC |
483 | /** |
484 | * omap_device_alloc - allocate an omap_device | |
485 | * @pdev: platform_device that will be included in this omap_device | |
486 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
487 | * @pdata: platform_data ptr to associate with the platform_device | |
488 | * @pdata_len: amount of memory pointed to by @pdata | |
489 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
490 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
491 | * | |
492 | * Convenience function for allocating an omap_device structure and filling | |
493 | * hwmods, resources and pm_latency attributes. | |
494 | * | |
495 | * Returns an struct omap_device pointer or ERR_PTR() on error; | |
496 | */ | |
993e4fbd | 497 | struct omap_device *omap_device_alloc(struct platform_device *pdev, |
a4f6cdb0 BC |
498 | struct omap_hwmod **ohs, int oh_cnt, |
499 | struct omap_device_pm_latency *pm_lats, | |
500 | int pm_lats_cnt) | |
501 | { | |
502 | int ret = -ENOMEM; | |
503 | struct omap_device *od; | |
504 | struct resource *res = NULL; | |
505 | int i, res_count; | |
506 | struct omap_hwmod **hwmods; | |
507 | ||
508 | od = kzalloc(sizeof(struct omap_device), GFP_KERNEL); | |
509 | if (!od) { | |
510 | ret = -ENOMEM; | |
511 | goto oda_exit1; | |
512 | } | |
513 | od->hwmods_cnt = oh_cnt; | |
514 | ||
515 | hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL); | |
516 | if (!hwmods) | |
517 | goto oda_exit2; | |
518 | ||
519 | od->hwmods = hwmods; | |
520 | od->pdev = pdev; | |
521 | ||
522 | /* | |
523 | * HACK: Ideally the resources from DT should match, and hwmod | |
524 | * should just add the missing ones. Since the name is not | |
525 | * properly populated by DT, stick to hwmod resources only. | |
526 | */ | |
527 | if (pdev->num_resources && pdev->resource) | |
528 | dev_warn(&pdev->dev, "%s(): resources already allocated %d\n", | |
529 | __func__, pdev->num_resources); | |
530 | ||
531 | res_count = omap_device_count_resources(od); | |
532 | if (res_count > 0) { | |
533 | dev_dbg(&pdev->dev, "%s(): resources allocated from hwmod %d\n", | |
534 | __func__, res_count); | |
535 | res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL); | |
536 | if (!res) | |
537 | goto oda_exit3; | |
538 | ||
539 | omap_device_fill_resources(od, res); | |
540 | ||
541 | ret = platform_device_add_resources(pdev, res, res_count); | |
542 | kfree(res); | |
543 | ||
544 | if (ret) | |
545 | goto oda_exit3; | |
546 | } | |
547 | ||
548 | if (!pm_lats) { | |
549 | pm_lats = omap_default_latency; | |
550 | pm_lats_cnt = ARRAY_SIZE(omap_default_latency); | |
551 | } | |
552 | ||
553 | od->pm_lats_cnt = pm_lats_cnt; | |
554 | od->pm_lats = kmemdup(pm_lats, | |
555 | sizeof(struct omap_device_pm_latency) * pm_lats_cnt, | |
556 | GFP_KERNEL); | |
557 | if (!od->pm_lats) | |
558 | goto oda_exit3; | |
559 | ||
560 | pdev->archdata.od = od; | |
561 | ||
562 | for (i = 0; i < oh_cnt; i++) { | |
563 | hwmods[i]->od = od; | |
564 | _add_hwmod_clocks_clkdev(od, hwmods[i]); | |
565 | } | |
566 | ||
567 | return od; | |
568 | ||
569 | oda_exit3: | |
570 | kfree(hwmods); | |
571 | oda_exit2: | |
572 | kfree(od); | |
573 | oda_exit1: | |
574 | dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret); | |
575 | ||
576 | return ERR_PTR(ret); | |
577 | } | |
578 | ||
993e4fbd | 579 | void omap_device_delete(struct omap_device *od) |
a4f6cdb0 | 580 | { |
dc2d07eb BC |
581 | if (!od) |
582 | return; | |
583 | ||
a4f6cdb0 BC |
584 | od->pdev->archdata.od = NULL; |
585 | kfree(od->pm_lats); | |
586 | kfree(od->hwmods); | |
587 | kfree(od); | |
588 | } | |
589 | ||
b04b65ab PW |
590 | /** |
591 | * omap_device_build - build and register an omap_device with one omap_hwmod | |
592 | * @pdev_name: name of the platform_device driver to use | |
593 | * @pdev_id: this platform_device's connection ID | |
594 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
595 | * @pdata: platform_data ptr to associate with the platform_device | |
596 | * @pdata_len: amount of memory pointed to by @pdata | |
597 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
598 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
c23a97d3 | 599 | * @is_early_device: should the device be registered as an early device or not |
b04b65ab PW |
600 | * |
601 | * Convenience function for building and registering a single | |
602 | * omap_device record, which in turn builds and registers a | |
603 | * platform_device record. See omap_device_build_ss() for more | |
604 | * information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise, | |
605 | * passes along the return value of omap_device_build_ss(). | |
606 | */ | |
9cf793f9 | 607 | struct platform_device __init *omap_device_build(const char *pdev_name, int pdev_id, |
b04b65ab PW |
608 | struct omap_hwmod *oh, void *pdata, |
609 | int pdata_len, | |
610 | struct omap_device_pm_latency *pm_lats, | |
c23a97d3 | 611 | int pm_lats_cnt, int is_early_device) |
b04b65ab PW |
612 | { |
613 | struct omap_hwmod *ohs[] = { oh }; | |
614 | ||
615 | if (!oh) | |
616 | return ERR_PTR(-EINVAL); | |
617 | ||
618 | return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata, | |
c23a97d3 TG |
619 | pdata_len, pm_lats, pm_lats_cnt, |
620 | is_early_device); | |
b04b65ab PW |
621 | } |
622 | ||
623 | /** | |
624 | * omap_device_build_ss - build and register an omap_device with multiple hwmods | |
625 | * @pdev_name: name of the platform_device driver to use | |
626 | * @pdev_id: this platform_device's connection ID | |
627 | * @oh: ptr to the single omap_hwmod that backs this omap_device | |
628 | * @pdata: platform_data ptr to associate with the platform_device | |
629 | * @pdata_len: amount of memory pointed to by @pdata | |
630 | * @pm_lats: pointer to a omap_device_pm_latency array for this device | |
631 | * @pm_lats_cnt: ARRAY_SIZE() of @pm_lats | |
c23a97d3 | 632 | * @is_early_device: should the device be registered as an early device or not |
b04b65ab PW |
633 | * |
634 | * Convenience function for building and registering an omap_device | |
635 | * subsystem record. Subsystem records consist of multiple | |
636 | * omap_hwmods. This function in turn builds and registers a | |
637 | * platform_device record. Returns an ERR_PTR() on error, or passes | |
638 | * along the return value of omap_device_register(). | |
639 | */ | |
9cf793f9 | 640 | struct platform_device __init *omap_device_build_ss(const char *pdev_name, int pdev_id, |
b04b65ab PW |
641 | struct omap_hwmod **ohs, int oh_cnt, |
642 | void *pdata, int pdata_len, | |
643 | struct omap_device_pm_latency *pm_lats, | |
c23a97d3 | 644 | int pm_lats_cnt, int is_early_device) |
b04b65ab PW |
645 | { |
646 | int ret = -ENOMEM; | |
d66b3fe4 | 647 | struct platform_device *pdev; |
b04b65ab | 648 | struct omap_device *od; |
b04b65ab PW |
649 | |
650 | if (!ohs || oh_cnt == 0 || !pdev_name) | |
651 | return ERR_PTR(-EINVAL); | |
652 | ||
653 | if (!pdata && pdata_len > 0) | |
654 | return ERR_PTR(-EINVAL); | |
655 | ||
d66b3fe4 KH |
656 | pdev = platform_device_alloc(pdev_name, pdev_id); |
657 | if (!pdev) { | |
658 | ret = -ENOMEM; | |
659 | goto odbs_exit; | |
660 | } | |
661 | ||
a4f6cdb0 BC |
662 | /* Set the dev_name early to allow dev_xxx in omap_device_alloc */ |
663 | if (pdev->id != -1) | |
664 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
665 | else | |
666 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
b04b65ab | 667 | |
a4f6cdb0 BC |
668 | od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt); |
669 | if (!od) | |
d66b3fe4 | 670 | goto odbs_exit1; |
d66b3fe4 KH |
671 | |
672 | ret = platform_device_add_data(pdev, pdata, pdata_len); | |
49b368a6 | 673 | if (ret) |
a4f6cdb0 | 674 | goto odbs_exit2; |
b04b65ab | 675 | |
c23a97d3 | 676 | if (is_early_device) |
d66b3fe4 | 677 | ret = omap_early_device_register(pdev); |
c23a97d3 | 678 | else |
d66b3fe4 KH |
679 | ret = omap_device_register(pdev); |
680 | if (ret) | |
a4f6cdb0 | 681 | goto odbs_exit2; |
06563581 | 682 | |
d66b3fe4 | 683 | return pdev; |
b04b65ab | 684 | |
d66b3fe4 | 685 | odbs_exit2: |
a4f6cdb0 | 686 | omap_device_delete(od); |
d66b3fe4 KH |
687 | odbs_exit1: |
688 | platform_device_put(pdev); | |
689 | odbs_exit: | |
b04b65ab PW |
690 | |
691 | pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret); | |
692 | ||
693 | return ERR_PTR(ret); | |
694 | } | |
695 | ||
c23a97d3 TG |
696 | /** |
697 | * omap_early_device_register - register an omap_device as an early platform | |
698 | * device. | |
699 | * @od: struct omap_device * to register | |
700 | * | |
701 | * Register the omap_device structure. This currently just calls | |
702 | * platform_early_add_device() on the underlying platform_device. | |
703 | * Returns 0 by default. | |
704 | */ | |
9cf793f9 | 705 | static int __init omap_early_device_register(struct platform_device *pdev) |
c23a97d3 TG |
706 | { |
707 | struct platform_device *devices[1]; | |
708 | ||
bfae4f8f | 709 | devices[0] = pdev; |
c23a97d3 TG |
710 | early_platform_add_devices(devices, 1); |
711 | return 0; | |
712 | } | |
713 | ||
256a5435 | 714 | #ifdef CONFIG_PM_RUNTIME |
638080c3 KH |
715 | static int _od_runtime_suspend(struct device *dev) |
716 | { | |
717 | struct platform_device *pdev = to_platform_device(dev); | |
345f79b3 | 718 | int ret; |
638080c3 | 719 | |
345f79b3 KH |
720 | ret = pm_generic_runtime_suspend(dev); |
721 | ||
722 | if (!ret) | |
723 | omap_device_idle(pdev); | |
724 | ||
725 | return ret; | |
726 | } | |
727 | ||
728 | static int _od_runtime_idle(struct device *dev) | |
729 | { | |
730 | return pm_generic_runtime_idle(dev); | |
638080c3 KH |
731 | } |
732 | ||
733 | static int _od_runtime_resume(struct device *dev) | |
734 | { | |
735 | struct platform_device *pdev = to_platform_device(dev); | |
736 | ||
345f79b3 KH |
737 | omap_device_enable(pdev); |
738 | ||
739 | return pm_generic_runtime_resume(dev); | |
638080c3 | 740 | } |
256a5435 | 741 | #endif |
638080c3 | 742 | |
c03f007a KH |
743 | #ifdef CONFIG_SUSPEND |
744 | static int _od_suspend_noirq(struct device *dev) | |
745 | { | |
746 | struct platform_device *pdev = to_platform_device(dev); | |
747 | struct omap_device *od = to_omap_device(pdev); | |
748 | int ret; | |
749 | ||
750 | ret = pm_generic_suspend_noirq(dev); | |
751 | ||
752 | if (!ret && !pm_runtime_status_suspended(dev)) { | |
753 | if (pm_generic_runtime_suspend(dev) == 0) { | |
b7c39a3f PW |
754 | if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)) |
755 | omap_device_idle(pdev); | |
c03f007a KH |
756 | od->flags |= OMAP_DEVICE_SUSPENDED; |
757 | } | |
758 | } | |
759 | ||
760 | return ret; | |
761 | } | |
762 | ||
763 | static int _od_resume_noirq(struct device *dev) | |
764 | { | |
765 | struct platform_device *pdev = to_platform_device(dev); | |
766 | struct omap_device *od = to_omap_device(pdev); | |
767 | ||
768 | if ((od->flags & OMAP_DEVICE_SUSPENDED) && | |
769 | !pm_runtime_status_suspended(dev)) { | |
770 | od->flags &= ~OMAP_DEVICE_SUSPENDED; | |
b7c39a3f PW |
771 | if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND)) |
772 | omap_device_enable(pdev); | |
c03f007a KH |
773 | pm_generic_runtime_resume(dev); |
774 | } | |
775 | ||
776 | return pm_generic_resume_noirq(dev); | |
777 | } | |
126caf13 KH |
778 | #else |
779 | #define _od_suspend_noirq NULL | |
780 | #define _od_resume_noirq NULL | |
c03f007a KH |
781 | #endif |
782 | ||
3ec2decb | 783 | struct dev_pm_domain omap_device_pm_domain = { |
638080c3 | 784 | .ops = { |
256a5435 KH |
785 | SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume, |
786 | _od_runtime_idle) | |
638080c3 | 787 | USE_PLATFORM_PM_SLEEP_OPS |
ff35336d KH |
788 | .suspend_noirq = _od_suspend_noirq, |
789 | .resume_noirq = _od_resume_noirq, | |
638080c3 KH |
790 | } |
791 | }; | |
792 | ||
b04b65ab PW |
793 | /** |
794 | * omap_device_register - register an omap_device with one omap_hwmod | |
795 | * @od: struct omap_device * to register | |
796 | * | |
797 | * Register the omap_device structure. This currently just calls | |
798 | * platform_device_register() on the underlying platform_device. | |
799 | * Returns the return value of platform_device_register(). | |
800 | */ | |
993e4fbd | 801 | int omap_device_register(struct platform_device *pdev) |
b04b65ab | 802 | { |
bfae4f8f | 803 | pr_debug("omap_device: %s: registering\n", pdev->name); |
b04b65ab | 804 | |
bfae4f8f | 805 | pdev->dev.pm_domain = &omap_device_pm_domain; |
d66b3fe4 | 806 | return platform_device_add(pdev); |
b04b65ab PW |
807 | } |
808 | ||
809 | ||
810 | /* Public functions for use by device drivers through struct platform_data */ | |
811 | ||
812 | /** | |
813 | * omap_device_enable - fully activate an omap_device | |
814 | * @od: struct omap_device * to activate | |
815 | * | |
816 | * Do whatever is necessary for the hwmods underlying omap_device @od | |
817 | * to be accessible and ready to operate. This generally involves | |
818 | * enabling clocks, setting SYSCONFIG registers; and in the future may | |
819 | * involve remuxing pins. Device drivers should call this function | |
820 | * (through platform_data function pointers) where they would normally | |
821 | * enable clocks, etc. Returns -EINVAL if called when the omap_device | |
822 | * is already enabled, or passes along the return value of | |
823 | * _omap_device_activate(). | |
824 | */ | |
825 | int omap_device_enable(struct platform_device *pdev) | |
826 | { | |
827 | int ret; | |
828 | struct omap_device *od; | |
829 | ||
8f0d69de | 830 | od = to_omap_device(pdev); |
b04b65ab PW |
831 | |
832 | if (od->_state == OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
833 | dev_warn(&pdev->dev, |
834 | "omap_device: %s() called from invalid state %d\n", | |
835 | __func__, od->_state); | |
b04b65ab PW |
836 | return -EINVAL; |
837 | } | |
838 | ||
839 | /* Enable everything if we're enabling this device from scratch */ | |
840 | if (od->_state == OMAP_DEVICE_STATE_UNKNOWN) | |
841 | od->pm_lat_level = od->pm_lats_cnt; | |
842 | ||
843 | ret = _omap_device_activate(od, IGNORE_WAKEUP_LAT); | |
844 | ||
845 | od->dev_wakeup_lat = 0; | |
5f1b6ef7 | 846 | od->_dev_wakeup_lat_limit = UINT_MAX; |
b04b65ab PW |
847 | od->_state = OMAP_DEVICE_STATE_ENABLED; |
848 | ||
849 | return ret; | |
850 | } | |
851 | ||
852 | /** | |
853 | * omap_device_idle - idle an omap_device | |
854 | * @od: struct omap_device * to idle | |
855 | * | |
856 | * Idle omap_device @od by calling as many .deactivate_func() entries | |
857 | * in the omap_device's pm_lats table as is possible without exceeding | |
858 | * the device's maximum wakeup latency limit, pm_lat_limit. Device | |
859 | * drivers should call this function (through platform_data function | |
860 | * pointers) where they would normally disable clocks after operations | |
861 | * complete, etc.. Returns -EINVAL if the omap_device is not | |
862 | * currently enabled, or passes along the return value of | |
863 | * _omap_device_deactivate(). | |
864 | */ | |
865 | int omap_device_idle(struct platform_device *pdev) | |
866 | { | |
867 | int ret; | |
868 | struct omap_device *od; | |
869 | ||
8f0d69de | 870 | od = to_omap_device(pdev); |
b04b65ab PW |
871 | |
872 | if (od->_state != OMAP_DEVICE_STATE_ENABLED) { | |
49882c99 KH |
873 | dev_warn(&pdev->dev, |
874 | "omap_device: %s() called from invalid state %d\n", | |
875 | __func__, od->_state); | |
b04b65ab PW |
876 | return -EINVAL; |
877 | } | |
878 | ||
879 | ret = _omap_device_deactivate(od, USE_WAKEUP_LAT); | |
880 | ||
881 | od->_state = OMAP_DEVICE_STATE_IDLE; | |
882 | ||
883 | return ret; | |
884 | } | |
885 | ||
886 | /** | |
887 | * omap_device_shutdown - shut down an omap_device | |
888 | * @od: struct omap_device * to shut down | |
889 | * | |
890 | * Shut down omap_device @od by calling all .deactivate_func() entries | |
891 | * in the omap_device's pm_lats table and then shutting down all of | |
892 | * the underlying omap_hwmods. Used when a device is being "removed" | |
893 | * or a device driver is being unloaded. Returns -EINVAL if the | |
894 | * omap_device is not currently enabled or idle, or passes along the | |
895 | * return value of _omap_device_deactivate(). | |
896 | */ | |
897 | int omap_device_shutdown(struct platform_device *pdev) | |
898 | { | |
899 | int ret, i; | |
900 | struct omap_device *od; | |
b04b65ab | 901 | |
8f0d69de | 902 | od = to_omap_device(pdev); |
b04b65ab PW |
903 | |
904 | if (od->_state != OMAP_DEVICE_STATE_ENABLED && | |
905 | od->_state != OMAP_DEVICE_STATE_IDLE) { | |
49882c99 KH |
906 | dev_warn(&pdev->dev, |
907 | "omap_device: %s() called from invalid state %d\n", | |
908 | __func__, od->_state); | |
b04b65ab PW |
909 | return -EINVAL; |
910 | } | |
911 | ||
912 | ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT); | |
913 | ||
f39f4898 KVA |
914 | for (i = 0; i < od->hwmods_cnt; i++) |
915 | omap_hwmod_shutdown(od->hwmods[i]); | |
b04b65ab PW |
916 | |
917 | od->_state = OMAP_DEVICE_STATE_SHUTDOWN; | |
918 | ||
919 | return ret; | |
920 | } | |
921 | ||
922 | /** | |
923 | * omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim | |
924 | * @od: struct omap_device * | |
925 | * | |
926 | * When a device's maximum wakeup latency limit changes, call some of | |
927 | * the .activate_func or .deactivate_func function pointers in the | |
928 | * omap_device's pm_lats array to ensure that the device's maximum | |
929 | * wakeup latency is less than or equal to the new latency limit. | |
930 | * Intended to be called by OMAP PM code whenever a device's maximum | |
931 | * wakeup latency limit changes (e.g., via | |
932 | * omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be | |
933 | * done (e.g., if the omap_device is not currently idle, or if the | |
934 | * wakeup latency is already current with the new limit) or passes | |
935 | * along the return value of _omap_device_deactivate() or | |
936 | * _omap_device_activate(). | |
937 | */ | |
938 | int omap_device_align_pm_lat(struct platform_device *pdev, | |
939 | u32 new_wakeup_lat_limit) | |
940 | { | |
941 | int ret = -EINVAL; | |
942 | struct omap_device *od; | |
943 | ||
8f0d69de | 944 | od = to_omap_device(pdev); |
b04b65ab PW |
945 | |
946 | if (new_wakeup_lat_limit == od->dev_wakeup_lat) | |
947 | return 0; | |
948 | ||
949 | od->_dev_wakeup_lat_limit = new_wakeup_lat_limit; | |
950 | ||
951 | if (od->_state != OMAP_DEVICE_STATE_IDLE) | |
952 | return 0; | |
953 | else if (new_wakeup_lat_limit > od->dev_wakeup_lat) | |
954 | ret = _omap_device_deactivate(od, USE_WAKEUP_LAT); | |
955 | else if (new_wakeup_lat_limit < od->dev_wakeup_lat) | |
956 | ret = _omap_device_activate(od, USE_WAKEUP_LAT); | |
957 | ||
958 | return ret; | |
959 | } | |
960 | ||
961 | /** | |
962 | * omap_device_get_pwrdm - return the powerdomain * associated with @od | |
963 | * @od: struct omap_device * | |
964 | * | |
965 | * Return the powerdomain associated with the first underlying | |
966 | * omap_hwmod for this omap_device. Intended for use by core OMAP PM | |
967 | * code. Returns NULL on error or a struct powerdomain * upon | |
968 | * success. | |
969 | */ | |
970 | struct powerdomain *omap_device_get_pwrdm(struct omap_device *od) | |
971 | { | |
972 | /* | |
973 | * XXX Assumes that all omap_hwmod powerdomains are identical. | |
974 | * This may not necessarily be true. There should be a sanity | |
975 | * check in here to WARN() if any difference appears. | |
976 | */ | |
977 | if (!od->hwmods_cnt) | |
978 | return NULL; | |
979 | ||
980 | return omap_hwmod_get_pwrdm(od->hwmods[0]); | |
981 | } | |
982 | ||
db2a60bf PW |
983 | /** |
984 | * omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base | |
985 | * @od: struct omap_device * | |
986 | * | |
987 | * Return the MPU's virtual address for the base of the hwmod, from | |
988 | * the ioremap() that the hwmod code does. Only valid if there is one | |
989 | * hwmod associated with this device. Returns NULL if there are zero | |
990 | * or more than one hwmods associated with this omap_device; | |
991 | * otherwise, passes along the return value from | |
992 | * omap_hwmod_get_mpu_rt_va(). | |
993 | */ | |
994 | void __iomem *omap_device_get_rt_va(struct omap_device *od) | |
995 | { | |
996 | if (od->hwmods_cnt != 1) | |
997 | return NULL; | |
998 | ||
999 | return omap_hwmod_get_mpu_rt_va(od->hwmods[0]); | |
1000 | } | |
1001 | ||
1f8a7d52 NM |
1002 | /** |
1003 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | |
1004 | * device pointer. | |
1005 | * @oh_name: name of the hwmod device | |
1006 | * | |
1007 | * Returns back a struct device * pointer associated with a hwmod | |
1008 | * device represented by a hwmod_name | |
1009 | */ | |
1010 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | |
1011 | { | |
1012 | struct omap_hwmod *oh; | |
1013 | ||
1014 | if (!oh_name) { | |
1015 | WARN(1, "%s: no hwmod name!\n", __func__); | |
1016 | return ERR_PTR(-EINVAL); | |
1017 | } | |
1018 | ||
1019 | oh = omap_hwmod_lookup(oh_name); | |
1020 | if (IS_ERR_OR_NULL(oh)) { | |
1021 | WARN(1, "%s: no hwmod for %s\n", __func__, | |
1022 | oh_name); | |
1023 | return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV); | |
1024 | } | |
1025 | if (IS_ERR_OR_NULL(oh->od)) { | |
1026 | WARN(1, "%s: no omap_device for %s\n", __func__, | |
1027 | oh_name); | |
1028 | return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV); | |
1029 | } | |
1030 | ||
1031 | if (IS_ERR_OR_NULL(oh->od->pdev)) | |
1032 | return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV); | |
1033 | ||
1034 | return &oh->od->pdev->dev; | |
1035 | } | |
1036 | EXPORT_SYMBOL(omap_device_get_by_hwmod_name); | |
1037 | ||
b04b65ab PW |
1038 | /* |
1039 | * Public functions intended for use in omap_device_pm_latency | |
1040 | * .activate_func and .deactivate_func function pointers | |
1041 | */ | |
1042 | ||
1043 | /** | |
1044 | * omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods | |
1045 | * @od: struct omap_device *od | |
1046 | * | |
1047 | * Enable all underlying hwmods. Returns 0. | |
1048 | */ | |
1049 | int omap_device_enable_hwmods(struct omap_device *od) | |
1050 | { | |
b04b65ab PW |
1051 | int i; |
1052 | ||
f39f4898 KVA |
1053 | for (i = 0; i < od->hwmods_cnt; i++) |
1054 | omap_hwmod_enable(od->hwmods[i]); | |
b04b65ab PW |
1055 | |
1056 | /* XXX pass along return value here? */ | |
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | /** | |
1061 | * omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods | |
1062 | * @od: struct omap_device *od | |
1063 | * | |
1064 | * Idle all underlying hwmods. Returns 0. | |
1065 | */ | |
1066 | int omap_device_idle_hwmods(struct omap_device *od) | |
1067 | { | |
b04b65ab PW |
1068 | int i; |
1069 | ||
f39f4898 KVA |
1070 | for (i = 0; i < od->hwmods_cnt; i++) |
1071 | omap_hwmod_idle(od->hwmods[i]); | |
b04b65ab PW |
1072 | |
1073 | /* XXX pass along return value here? */ | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | /** | |
1078 | * omap_device_disable_clocks - disable all main and interface clocks | |
1079 | * @od: struct omap_device *od | |
1080 | * | |
1081 | * Disable the main functional clock and interface clock for all of the | |
1082 | * omap_hwmods associated with the omap_device. Returns 0. | |
1083 | */ | |
1084 | int omap_device_disable_clocks(struct omap_device *od) | |
1085 | { | |
b04b65ab PW |
1086 | int i; |
1087 | ||
f39f4898 KVA |
1088 | for (i = 0; i < od->hwmods_cnt; i++) |
1089 | omap_hwmod_disable_clocks(od->hwmods[i]); | |
b04b65ab PW |
1090 | |
1091 | /* XXX pass along return value here? */ | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | /** | |
1096 | * omap_device_enable_clocks - enable all main and interface clocks | |
1097 | * @od: struct omap_device *od | |
1098 | * | |
1099 | * Enable the main functional clock and interface clock for all of the | |
1100 | * omap_hwmods associated with the omap_device. Returns 0. | |
1101 | */ | |
1102 | int omap_device_enable_clocks(struct omap_device *od) | |
1103 | { | |
b04b65ab PW |
1104 | int i; |
1105 | ||
f39f4898 KVA |
1106 | for (i = 0; i < od->hwmods_cnt; i++) |
1107 | omap_hwmod_enable_clocks(od->hwmods[i]); | |
b04b65ab PW |
1108 | |
1109 | /* XXX pass along return value here? */ | |
1110 | return 0; | |
1111 | } | |
0d5e8252 | 1112 | |
dc2d07eb BC |
1113 | static struct notifier_block platform_nb = { |
1114 | .notifier_call = _omap_device_notifier_call, | |
1115 | }; | |
1116 | ||
0d5e8252 KH |
1117 | static int __init omap_device_init(void) |
1118 | { | |
dc2d07eb | 1119 | bus_register_notifier(&platform_bus_type, &platform_nb); |
3ec2decb | 1120 | return 0; |
0d5e8252 KH |
1121 | } |
1122 | core_initcall(omap_device_init); |