Shefali Jain | 0dc6e78 | 2017-11-27 13:06:27 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Google, Inc. |
| 3 | * Copyright (c) 2007-2014, 2017, The Linux Foundation. All rights reserved. |
| 4 | * |
| 5 | * This software is licensed under the terms of the GNU General Public |
| 6 | * License version 2, as published by the Free Software Foundation, and |
| 7 | * may be copied, distributed, and modified under those terms. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/ctype.h> |
| 19 | #include <linux/debugfs.h> |
| 20 | #include <linux/seq_file.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/list.h> |
| 23 | #include <linux/clkdev.h> |
| 24 | #include <linux/uaccess.h> |
| 25 | #include <linux/mutex.h> |
| 26 | #include <linux/io.h> |
| 27 | #include <linux/clk/msm-clk-provider.h> |
| 28 | #include <trace/events/power.h> |
| 29 | |
| 30 | |
| 31 | #include "clock.h" |
| 32 | |
| 33 | static LIST_HEAD(clk_list); |
| 34 | static DEFINE_MUTEX(clk_list_lock); |
| 35 | |
| 36 | static struct dentry *debugfs_base; |
| 37 | static u32 debug_suspend; |
| 38 | |
| 39 | static int clock_debug_rate_set(void *data, u64 val) |
| 40 | { |
| 41 | struct clk *clock = data; |
| 42 | int ret; |
| 43 | |
| 44 | /* Only increases to max rate will succeed, but that's actually good |
| 45 | * for debugging purposes so we don't check for error. |
| 46 | */ |
| 47 | if (clock->flags & CLKFLAG_MAX) |
| 48 | clk_set_max_rate(clock, val); |
| 49 | ret = clk_set_rate(clock, val); |
| 50 | if (ret) |
| 51 | pr_err("clk_set_rate(%s, %lu) failed (%d)\n", clock->dbg_name, |
| 52 | (unsigned long)val, ret); |
| 53 | |
| 54 | return ret; |
| 55 | } |
| 56 | |
| 57 | static int clock_debug_rate_get(void *data, u64 *val) |
| 58 | { |
| 59 | struct clk *clock = data; |
| 60 | *val = clk_get_rate(clock); |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | DEFINE_SIMPLE_ATTRIBUTE(clock_rate_fops, clock_debug_rate_get, |
| 65 | clock_debug_rate_set, "%llu\n"); |
| 66 | |
| 67 | static struct clk *measure; |
| 68 | |
| 69 | static int clock_debug_measure_get(void *data, u64 *val) |
| 70 | { |
| 71 | struct clk *clock = data, *par; |
| 72 | int ret, is_hw_gated; |
| 73 | unsigned long meas_rate, sw_rate; |
| 74 | |
| 75 | /* Check to see if the clock is in hardware gating mode */ |
| 76 | if (clock->ops->in_hwcg_mode) |
| 77 | is_hw_gated = clock->ops->in_hwcg_mode(clock); |
| 78 | else |
| 79 | is_hw_gated = 0; |
| 80 | |
| 81 | ret = clk_set_parent(measure, clock); |
| 82 | if (!ret) { |
| 83 | /* |
| 84 | * Disable hw gating to get accurate rate measurements. Only do |
| 85 | * this if the clock is explicitly enabled by software. This |
| 86 | * allows us to detect errors where clocks are on even though |
| 87 | * software is not requesting them to be on due to broken |
| 88 | * hardware gating signals. |
| 89 | */ |
| 90 | if (is_hw_gated && clock->count) |
| 91 | clock->ops->disable_hwcg(clock); |
| 92 | par = measure; |
| 93 | while (par && par != clock) { |
| 94 | if (par->ops->enable) |
| 95 | par->ops->enable(par); |
| 96 | par = par->parent; |
| 97 | } |
| 98 | *val = clk_get_rate(measure); |
| 99 | /* Reenable hwgating if it was disabled */ |
| 100 | if (is_hw_gated && clock->count) |
| 101 | clock->ops->enable_hwcg(clock); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * If there's a divider on the path from the clock output to the |
| 106 | * measurement circuitry, account for it by dividing the original clock |
| 107 | * rate with the rate set on the parent of the measure clock. |
| 108 | */ |
| 109 | meas_rate = clk_get_rate(clock); |
| 110 | sw_rate = clk_get_rate(measure->parent); |
| 111 | if (sw_rate && meas_rate >= (sw_rate * 2)) |
| 112 | *val *= DIV_ROUND_CLOSEST(meas_rate, sw_rate); |
| 113 | |
| 114 | return ret; |
| 115 | } |
| 116 | |
| 117 | DEFINE_SIMPLE_ATTRIBUTE(clock_measure_fops, clock_debug_measure_get, |
| 118 | NULL, "%lld\n"); |
| 119 | |
| 120 | static int clock_debug_enable_set(void *data, u64 val) |
| 121 | { |
| 122 | struct clk *clock = data; |
| 123 | int rc = 0; |
| 124 | |
| 125 | if (val) |
| 126 | rc = clk_prepare_enable(clock); |
| 127 | else |
| 128 | clk_disable_unprepare(clock); |
| 129 | |
| 130 | return rc; |
| 131 | } |
| 132 | |
| 133 | static int clock_debug_enable_get(void *data, u64 *val) |
| 134 | { |
| 135 | struct clk *clock = data; |
| 136 | int enabled; |
| 137 | |
| 138 | if (clock->ops->is_enabled) |
| 139 | enabled = clock->ops->is_enabled(clock); |
| 140 | else |
| 141 | enabled = !!(clock->count); |
| 142 | |
| 143 | *val = enabled; |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | DEFINE_SIMPLE_ATTRIBUTE(clock_enable_fops, clock_debug_enable_get, |
| 148 | clock_debug_enable_set, "%lld\n"); |
| 149 | |
| 150 | static int clock_debug_local_get(void *data, u64 *val) |
| 151 | { |
| 152 | struct clk *clock = data; |
| 153 | |
| 154 | if (!clock->ops->is_local) |
| 155 | *val = true; |
| 156 | else |
| 157 | *val = clock->ops->is_local(clock); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | DEFINE_SIMPLE_ATTRIBUTE(clock_local_fops, clock_debug_local_get, |
| 163 | NULL, "%llu\n"); |
| 164 | |
| 165 | static int clock_debug_hwcg_get(void *data, u64 *val) |
| 166 | { |
| 167 | struct clk *clock = data; |
| 168 | |
| 169 | if (clock->ops->in_hwcg_mode) |
| 170 | *val = !!clock->ops->in_hwcg_mode(clock); |
| 171 | else |
| 172 | *val = 0; |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | DEFINE_SIMPLE_ATTRIBUTE(clock_hwcg_fops, clock_debug_hwcg_get, |
| 177 | NULL, "%llu\n"); |
| 178 | |
| 179 | static void clock_print_fmax_by_level(struct seq_file *m, int level) |
| 180 | { |
| 181 | struct clk *clock = m->private; |
| 182 | struct clk_vdd_class *vdd_class = clock->vdd_class; |
| 183 | int off, i, vdd_level, nregs = vdd_class->num_regulators; |
| 184 | |
| 185 | vdd_level = find_vdd_level(clock, clock->rate); |
| 186 | |
| 187 | seq_printf(m, "%2s%10lu", vdd_level == level ? "[" : "", |
| 188 | clock->fmax[level]); |
| 189 | for (i = 0; i < nregs; i++) { |
| 190 | off = nregs*level + i; |
| 191 | if (vdd_class->vdd_uv) |
| 192 | seq_printf(m, "%10u", vdd_class->vdd_uv[off]); |
| 193 | if (vdd_class->vdd_ua) |
| 194 | seq_printf(m, "%10u", vdd_class->vdd_ua[off]); |
| 195 | } |
| 196 | |
| 197 | if (vdd_level == level) |
| 198 | seq_puts(m, "]"); |
| 199 | seq_puts(m, "\n"); |
| 200 | } |
| 201 | |
| 202 | static int fmax_rates_show(struct seq_file *m, void *unused) |
| 203 | { |
| 204 | struct clk *clock = m->private; |
| 205 | struct clk_vdd_class *vdd_class = clock->vdd_class; |
| 206 | int level = 0, i, nregs = vdd_class->num_regulators; |
| 207 | char reg_name[10]; |
| 208 | |
| 209 | int vdd_level = find_vdd_level(clock, clock->rate); |
| 210 | |
| 211 | if (vdd_level < 0) { |
| 212 | seq_printf(m, "could not find_vdd_level for %s, %ld\n", |
| 213 | clock->dbg_name, clock->rate); |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | seq_printf(m, "%12s", ""); |
| 218 | for (i = 0; i < nregs; i++) { |
| 219 | snprintf(reg_name, ARRAY_SIZE(reg_name), "reg %d", i); |
| 220 | seq_printf(m, "%10s", reg_name); |
| 221 | if (vdd_class->vdd_ua) |
| 222 | seq_printf(m, "%10s", ""); |
| 223 | } |
| 224 | |
| 225 | seq_printf(m, "\n%12s", "freq"); |
| 226 | for (i = 0; i < nregs; i++) { |
| 227 | seq_printf(m, "%10s", "uV"); |
| 228 | if (vdd_class->vdd_ua) |
| 229 | seq_printf(m, "%10s", "uA"); |
| 230 | } |
| 231 | seq_puts(m, "\n"); |
| 232 | |
| 233 | for (level = 0; level < clock->num_fmax; level++) |
| 234 | clock_print_fmax_by_level(m, level); |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int fmax_rates_open(struct inode *inode, struct file *file) |
| 240 | { |
| 241 | return single_open(file, fmax_rates_show, inode->i_private); |
| 242 | } |
| 243 | |
| 244 | static const struct file_operations fmax_rates_fops = { |
| 245 | .open = fmax_rates_open, |
| 246 | .read = seq_read, |
| 247 | .llseek = seq_lseek, |
| 248 | .release = seq_release, |
| 249 | }; |
| 250 | |
| 251 | static int orphan_list_show(struct seq_file *m, void *unused) |
| 252 | { |
| 253 | struct clk *c, *safe; |
| 254 | |
| 255 | list_for_each_entry_safe(c, safe, &orphan_clk_list, list) |
| 256 | seq_printf(m, "%s\n", c->dbg_name); |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static int orphan_list_open(struct inode *inode, struct file *file) |
| 262 | { |
| 263 | return single_open(file, orphan_list_show, inode->i_private); |
| 264 | } |
| 265 | |
| 266 | static const struct file_operations orphan_list_fops = { |
| 267 | .open = orphan_list_open, |
| 268 | .read = seq_read, |
| 269 | .llseek = seq_lseek, |
| 270 | .release = seq_release, |
| 271 | }; |
| 272 | |
| 273 | #define clock_debug_output(m, c, fmt, ...) \ |
| 274 | do { \ |
| 275 | if (m) \ |
| 276 | seq_printf(m, fmt, ##__VA_ARGS__); \ |
| 277 | else if (c) \ |
| 278 | pr_cont(fmt, ##__VA_ARGS__); \ |
| 279 | else \ |
| 280 | pr_info(fmt, ##__VA_ARGS__); \ |
| 281 | } while (0) |
| 282 | |
| 283 | /* |
| 284 | * clock_debug_print_enabled_debug_suspend() - Print names of enabled clocks |
| 285 | * during suspend. |
| 286 | */ |
| 287 | static void clock_debug_print_enabled_debug_suspend(struct seq_file *s) |
| 288 | { |
| 289 | struct clk *c; |
| 290 | int cnt = 0; |
| 291 | |
| 292 | if (!mutex_trylock(&clk_list_lock)) |
| 293 | return; |
| 294 | |
| 295 | clock_debug_output(s, 0, "Enabled clocks:\n"); |
| 296 | |
| 297 | list_for_each_entry(c, &clk_list, list) { |
| 298 | if (!c || !c->prepare_count) |
| 299 | continue; |
| 300 | if (c->vdd_class) |
| 301 | clock_debug_output(s, 0, " %s:%lu:%lu [%ld, %d]", |
| 302 | c->dbg_name, c->prepare_count, |
| 303 | c->count, c->rate, |
| 304 | find_vdd_level(c, c->rate)); |
| 305 | else |
| 306 | clock_debug_output(s, 0, " %s:%lu:%lu [%ld]", |
| 307 | c->dbg_name, c->prepare_count, |
| 308 | c->count, c->rate); |
| 309 | cnt++; |
| 310 | } |
| 311 | |
| 312 | mutex_unlock(&clk_list_lock); |
| 313 | |
| 314 | if (cnt) |
| 315 | clock_debug_output(s, 0, "Enabled clock count: %d\n", cnt); |
| 316 | else |
| 317 | clock_debug_output(s, 0, "No clocks enabled.\n"); |
| 318 | } |
| 319 | |
| 320 | static int clock_debug_print_clock(struct clk *c, struct seq_file *m) |
| 321 | { |
| 322 | char *start = ""; |
| 323 | |
| 324 | if (!c || !c->prepare_count) |
| 325 | return 0; |
| 326 | |
| 327 | clock_debug_output(m, 0, "\t"); |
| 328 | do { |
| 329 | if (c->vdd_class) |
| 330 | clock_debug_output(m, 1, "%s%s:%lu:%lu [%ld, %d]", |
| 331 | start, c->dbg_name, c->prepare_count, c->count, |
| 332 | c->rate, find_vdd_level(c, c->rate)); |
| 333 | else |
| 334 | clock_debug_output(m, 1, "%s%s:%lu:%lu [%ld]", start, |
| 335 | c->dbg_name, c->prepare_count, c->count, |
| 336 | c->rate); |
| 337 | start = " -> "; |
| 338 | } while ((c = clk_get_parent(c))); |
| 339 | |
| 340 | clock_debug_output(m, 1, "\n"); |
| 341 | |
| 342 | return 1; |
| 343 | } |
| 344 | |
| 345 | /** |
| 346 | * clock_debug_print_enabled_clocks() - Print names of enabled clocks |
| 347 | * |
| 348 | */ |
| 349 | static void clock_debug_print_enabled_clocks(struct seq_file *m) |
| 350 | { |
| 351 | struct clk *c; |
| 352 | int cnt = 0; |
| 353 | |
| 354 | if (!mutex_trylock(&clk_list_lock)) { |
| 355 | pr_err("clock-debug: Clocks are being registered. Cannot print clock state now.\n"); |
| 356 | return; |
| 357 | } |
| 358 | clock_debug_output(m, 0, "Enabled clocks:\n"); |
| 359 | list_for_each_entry(c, &clk_list, list) { |
| 360 | cnt += clock_debug_print_clock(c, m); |
| 361 | } |
| 362 | mutex_unlock(&clk_list_lock); |
| 363 | |
| 364 | if (cnt) |
| 365 | clock_debug_output(m, 0, "Enabled clock count: %d\n", cnt); |
| 366 | else |
| 367 | clock_debug_output(m, 0, "No clocks enabled.\n"); |
| 368 | } |
| 369 | |
| 370 | static int enabled_clocks_show(struct seq_file *m, void *unused) |
| 371 | { |
| 372 | clock_debug_print_enabled_clocks(m); |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | static int enabled_clocks_open(struct inode *inode, struct file *file) |
| 377 | { |
| 378 | return single_open(file, enabled_clocks_show, inode->i_private); |
| 379 | } |
| 380 | |
| 381 | static const struct file_operations enabled_clocks_fops = { |
| 382 | .open = enabled_clocks_open, |
| 383 | .read = seq_read, |
| 384 | .llseek = seq_lseek, |
| 385 | .release = seq_release, |
| 386 | }; |
| 387 | |
| 388 | static int trace_clocks_show(struct seq_file *m, void *unused) |
| 389 | { |
| 390 | struct clk *c; |
| 391 | int total_cnt = 0; |
| 392 | |
| 393 | if (!mutex_trylock(&clk_list_lock)) { |
| 394 | pr_err("trace_clocks: Clocks are being registered. Cannot trace clock state now.\n"); |
| 395 | return 1; |
| 396 | } |
| 397 | list_for_each_entry(c, &clk_list, list) { |
| 398 | trace_clock_state(c->dbg_name, c->prepare_count, c->count, |
| 399 | c->rate); |
| 400 | total_cnt++; |
| 401 | } |
| 402 | mutex_unlock(&clk_list_lock); |
| 403 | clock_debug_output(m, 0, "Total clock count: %d\n", total_cnt); |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | static int trace_clocks_open(struct inode *inode, struct file *file) |
| 409 | { |
| 410 | return single_open(file, trace_clocks_show, inode->i_private); |
| 411 | } |
| 412 | static const struct file_operations trace_clocks_fops = { |
| 413 | .open = trace_clocks_open, |
| 414 | .read = seq_read, |
| 415 | .llseek = seq_lseek, |
| 416 | .release = seq_release, |
| 417 | }; |
| 418 | |
| 419 | static int list_rates_show(struct seq_file *m, void *unused) |
| 420 | { |
| 421 | struct clk *clock = m->private; |
| 422 | int level, i = 0; |
| 423 | unsigned long rate, fmax = 0; |
| 424 | |
| 425 | /* Find max frequency supported within voltage constraints. */ |
| 426 | if (!clock->vdd_class) { |
| 427 | fmax = ULONG_MAX; |
| 428 | } else { |
| 429 | for (level = 0; level < clock->num_fmax; level++) |
| 430 | if (clock->fmax[level]) |
| 431 | fmax = clock->fmax[level]; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * List supported frequencies <= fmax. Higher frequencies may appear in |
| 436 | * the frequency table, but are not valid and should not be listed. |
| 437 | */ |
| 438 | while (!IS_ERR_VALUE(rate = clock->ops->list_rate(clock, i++))) { |
| 439 | if (rate <= fmax) |
| 440 | seq_printf(m, "%lu\n", rate); |
| 441 | } |
| 442 | |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int list_rates_open(struct inode *inode, struct file *file) |
| 447 | { |
| 448 | return single_open(file, list_rates_show, inode->i_private); |
| 449 | } |
| 450 | |
| 451 | static const struct file_operations list_rates_fops = { |
| 452 | .open = list_rates_open, |
| 453 | .read = seq_read, |
| 454 | .llseek = seq_lseek, |
| 455 | .release = seq_release, |
| 456 | }; |
| 457 | |
| 458 | static ssize_t clock_parent_read(struct file *filp, char __user *ubuf, |
| 459 | size_t cnt, loff_t *ppos) |
| 460 | { |
| 461 | struct clk *clock = filp->private_data; |
| 462 | struct clk *p = clock->parent; |
| 463 | char name[256] = {0}; |
| 464 | |
| 465 | snprintf(name, sizeof(name), "%s\n", p ? p->dbg_name : "None\n"); |
| 466 | |
| 467 | return simple_read_from_buffer(ubuf, cnt, ppos, name, strlen(name)); |
| 468 | } |
| 469 | |
| 470 | |
| 471 | static ssize_t clock_parent_write(struct file *filp, |
| 472 | const char __user *ubuf, size_t cnt, loff_t *ppos) |
| 473 | { |
| 474 | struct clk *clock = filp->private_data; |
| 475 | char buf[256]; |
| 476 | char *cmp; |
| 477 | int ret; |
| 478 | struct clk *parent = NULL; |
| 479 | |
| 480 | cnt = min(cnt, sizeof(buf) - 1); |
| 481 | if (copy_from_user(&buf, ubuf, cnt)) |
| 482 | return -EFAULT; |
| 483 | buf[cnt] = '\0'; |
| 484 | cmp = strstrip(buf); |
| 485 | |
| 486 | mutex_lock(&clk_list_lock); |
| 487 | list_for_each_entry(parent, &clk_list, list) { |
| 488 | if (!strcmp(cmp, parent->dbg_name)) |
| 489 | break; |
| 490 | } |
| 491 | |
| 492 | if (&parent->list == &clk_list) { |
| 493 | ret = -EINVAL; |
| 494 | goto err; |
| 495 | } |
| 496 | |
| 497 | mutex_unlock(&clk_list_lock); |
| 498 | ret = clk_set_parent(clock, parent); |
| 499 | if (ret) |
| 500 | return ret; |
| 501 | |
| 502 | return cnt; |
| 503 | err: |
| 504 | mutex_unlock(&clk_list_lock); |
| 505 | return ret; |
| 506 | } |
| 507 | |
| 508 | |
| 509 | static const struct file_operations clock_parent_fops = { |
| 510 | .open = simple_open, |
| 511 | .read = clock_parent_read, |
| 512 | .write = clock_parent_write, |
| 513 | }; |
| 514 | |
| 515 | void clk_debug_print_hw(struct clk *clk, struct seq_file *f) |
| 516 | { |
| 517 | void __iomem *base; |
| 518 | struct clk_register_data *regs; |
| 519 | u32 i, j, size; |
| 520 | |
| 521 | if (IS_ERR_OR_NULL(clk)) |
| 522 | return; |
| 523 | |
| 524 | clk_debug_print_hw(clk->parent, f); |
| 525 | |
| 526 | clock_debug_output(f, false, "%s\n", clk->dbg_name); |
| 527 | |
| 528 | if (!clk->ops->list_registers) |
| 529 | return; |
| 530 | |
| 531 | j = 0; |
| 532 | base = clk->ops->list_registers(clk, j, ®s, &size); |
| 533 | while (!IS_ERR(base)) { |
| 534 | for (i = 0; i < size; i++) { |
| 535 | u32 val = readl_relaxed(base + regs[i].offset); |
| 536 | |
| 537 | clock_debug_output(f, false, "%20s: 0x%.8x\n", |
| 538 | regs[i].name, val); |
| 539 | } |
| 540 | j++; |
| 541 | base = clk->ops->list_registers(clk, j, ®s, &size); |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | static int print_hw_show(struct seq_file *m, void *unused) |
| 546 | { |
| 547 | struct clk *c = m->private; |
| 548 | |
| 549 | clk_debug_print_hw(c, m); |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static int print_hw_open(struct inode *inode, struct file *file) |
| 555 | { |
| 556 | return single_open(file, print_hw_show, inode->i_private); |
| 557 | } |
| 558 | |
| 559 | static const struct file_operations clock_print_hw_fops = { |
| 560 | .open = print_hw_open, |
| 561 | .read = seq_read, |
| 562 | .llseek = seq_lseek, |
| 563 | .release = seq_release, |
| 564 | }; |
| 565 | |
| 566 | |
| 567 | static void clock_measure_add(struct clk *clock) |
| 568 | { |
| 569 | if (IS_ERR_OR_NULL(measure)) |
| 570 | return; |
| 571 | |
| 572 | if (clk_set_parent(measure, clock)) |
| 573 | return; |
| 574 | |
| 575 | debugfs_create_file("measure", 0444, clock->clk_dir, clock, |
| 576 | &clock_measure_fops); |
| 577 | } |
| 578 | |
| 579 | static int clock_debug_add(struct clk *clock) |
| 580 | { |
| 581 | char temp[50], *ptr; |
| 582 | struct dentry *clk_dir; |
| 583 | |
| 584 | if (!debugfs_base) |
| 585 | return -ENOMEM; |
| 586 | |
| 587 | strlcpy(temp, clock->dbg_name, ARRAY_SIZE(temp)); |
| 588 | for (ptr = temp; *ptr; ptr++) |
| 589 | *ptr = tolower(*ptr); |
| 590 | |
| 591 | clk_dir = debugfs_create_dir(temp, debugfs_base); |
| 592 | if (!clk_dir) |
| 593 | return -ENOMEM; |
| 594 | |
| 595 | clock->clk_dir = clk_dir; |
| 596 | |
| 597 | if (!debugfs_create_file("rate", 0644, clk_dir, |
| 598 | clock, &clock_rate_fops)) |
| 599 | goto error; |
| 600 | |
| 601 | if (!debugfs_create_file("enable", 0644, clk_dir, |
| 602 | clock, &clock_enable_fops)) |
| 603 | goto error; |
| 604 | |
| 605 | if (!debugfs_create_file("is_local", 0444, clk_dir, clock, |
| 606 | &clock_local_fops)) |
| 607 | goto error; |
| 608 | |
| 609 | if (!debugfs_create_file("has_hw_gating", 0444, clk_dir, clock, |
| 610 | &clock_hwcg_fops)) |
| 611 | goto error; |
| 612 | |
| 613 | if (clock->ops->list_rate) |
| 614 | if (!debugfs_create_file("list_rates", |
| 615 | 0444, clk_dir, clock, &list_rates_fops)) |
| 616 | goto error; |
| 617 | |
| 618 | if (clock->vdd_class && !debugfs_create_file( |
| 619 | "fmax_rates", 0444, clk_dir, clock, &fmax_rates_fops)) |
| 620 | goto error; |
| 621 | |
| 622 | if (!debugfs_create_file("parent", 0444, clk_dir, clock, |
| 623 | &clock_parent_fops)) |
| 624 | goto error; |
| 625 | |
| 626 | if (!debugfs_create_file("print", 0444, clk_dir, clock, |
| 627 | &clock_print_hw_fops)) |
| 628 | goto error; |
| 629 | |
| 630 | clock_measure_add(clock); |
| 631 | |
| 632 | return 0; |
| 633 | error: |
| 634 | debugfs_remove_recursive(clk_dir); |
| 635 | return -ENOMEM; |
| 636 | } |
| 637 | static DEFINE_MUTEX(clk_debug_lock); |
| 638 | static int clk_debug_init_once; |
| 639 | |
| 640 | /** |
| 641 | * clock_debug_init() - Initialize clock debugfs |
| 642 | * Lock clk_debug_lock before invoking this function. |
| 643 | */ |
| 644 | static int clock_debug_init(void) |
| 645 | { |
| 646 | if (clk_debug_init_once) |
| 647 | return 0; |
| 648 | |
| 649 | clk_debug_init_once = 1; |
| 650 | |
| 651 | debugfs_base = debugfs_create_dir("clk", NULL); |
| 652 | if (!debugfs_base) |
| 653 | return -ENOMEM; |
| 654 | |
| 655 | if (!debugfs_create_u32("debug_suspend", 0644, |
| 656 | debugfs_base, &debug_suspend)) { |
| 657 | debugfs_remove_recursive(debugfs_base); |
| 658 | return -ENOMEM; |
| 659 | } |
| 660 | |
| 661 | if (!debugfs_create_file("enabled_clocks", 0444, debugfs_base, NULL, |
| 662 | &enabled_clocks_fops)) |
| 663 | return -ENOMEM; |
| 664 | |
| 665 | if (!debugfs_create_file("orphan_list", 0444, debugfs_base, NULL, |
| 666 | &orphan_list_fops)) |
| 667 | return -ENOMEM; |
| 668 | |
| 669 | if (!debugfs_create_file("trace_clocks", 0444, debugfs_base, NULL, |
| 670 | &trace_clocks_fops)) |
| 671 | return -ENOMEM; |
| 672 | |
| 673 | return 0; |
| 674 | } |
| 675 | |
| 676 | /** |
| 677 | * clock_debug_register() - Add additional clocks to clock debugfs hierarchy |
| 678 | * @list: List of clocks to create debugfs nodes for |
| 679 | */ |
| 680 | int clock_debug_register(struct clk *clk) |
| 681 | { |
| 682 | int ret = 0; |
| 683 | struct clk *c; |
| 684 | |
| 685 | mutex_lock(&clk_list_lock); |
| 686 | if (!list_empty(&clk->list)) |
| 687 | goto out; |
| 688 | |
| 689 | ret = clock_debug_init(); |
| 690 | if (ret) |
| 691 | goto out; |
| 692 | |
| 693 | if (IS_ERR_OR_NULL(measure)) { |
| 694 | if (clk->flags & CLKFLAG_MEASURE) |
| 695 | measure = clk; |
| 696 | if (!IS_ERR_OR_NULL(measure)) { |
| 697 | list_for_each_entry(c, &clk_list, list) |
| 698 | clock_measure_add(c); |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | list_add_tail(&clk->list, &clk_list); |
| 703 | clock_debug_add(clk); |
| 704 | out: |
| 705 | mutex_unlock(&clk_list_lock); |
| 706 | return ret; |
| 707 | } |
| 708 | |
| 709 | /* |
| 710 | * Print the names of enabled clocks and their parents if debug_suspend is set |
| 711 | */ |
| 712 | void clock_debug_print_enabled(bool print_parent) |
| 713 | { |
| 714 | if (likely(!debug_suspend)) |
| 715 | return; |
| 716 | if (print_parent) |
| 717 | clock_debug_print_enabled_clocks(NULL); |
| 718 | else |
| 719 | clock_debug_print_enabled_debug_suspend(NULL); |
| 720 | |
| 721 | } |