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   1 /*
   2  * linux/arch/arm/plat-omap/dmtimer.c
   3  *
   4  * OMAP Dual-Mode Timers
   5  *
   6  * Copyright (C) 2005 Nokia Corporation
   7  * OMAP2 support by Juha Yrjola
   8  * API improvements and OMAP2 clock framework support by Timo Teras
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the
  12  * Free Software Foundation; either version 2 of the License, or (at your
  13  * option) any later version.
  14  *
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  16  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  17  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  18  * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  * You should have received a copy of the  GNU General Public License along
  25  * with this program; if not, write  to the Free Software Foundation, Inc.,
  26  * 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/init.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/errno.h>
  32 #include <linux/list.h>
  33 #include <linux/clk.h>
  34 #include <linux/delay.h>
  35 #include <asm/hardware.h>
  36 #include <asm/arch/dmtimer.h>
  37 #include <asm/io.h>
  38 #include <asm/arch/irqs.h>
  39
  40 /* register offsets */
  41 #define OMAP_TIMER_ID_REG               0x00
  42 #define OMAP_TIMER_OCP_CFG_REG          0x10
  43 #define OMAP_TIMER_SYS_STAT_REG         0x14
  44 #define OMAP_TIMER_STAT_REG             0x18
  45 #define OMAP_TIMER_INT_EN_REG           0x1c
  46 #define OMAP_TIMER_WAKEUP_EN_REG        0x20
  47 #define OMAP_TIMER_CTRL_REG             0x24
  48 #define OMAP_TIMER_COUNTER_REG          0x28
  49 #define OMAP_TIMER_LOAD_REG             0x2c
  50 #define OMAP_TIMER_TRIGGER_REG          0x30
  51 #define OMAP_TIMER_WRITE_PEND_REG       0x34
  52 #define OMAP_TIMER_MATCH_REG            0x38
  53 #define OMAP_TIMER_CAPTURE_REG          0x3c
  54 #define OMAP_TIMER_IF_CTRL_REG          0x40
  55
  56 /* timer control reg bits */
  57 #define OMAP_TIMER_CTRL_GPOCFG          (1 << 14)
  58 #define OMAP_TIMER_CTRL_CAPTMODE        (1 << 13)
  59 #define OMAP_TIMER_CTRL_PT              (1 << 12)
  60 #define OMAP_TIMER_CTRL_TCM_LOWTOHIGH   (0x1 << 8)
  61 #define OMAP_TIMER_CTRL_TCM_HIGHTOLOW   (0x2 << 8)
  62 #define OMAP_TIMER_CTRL_TCM_BOTHEDGES   (0x3 << 8)
  63 #define OMAP_TIMER_CTRL_SCPWM           (1 << 7)
  64 #define OMAP_TIMER_CTRL_CE              (1 << 6)        /* compare enable */
  65 #define OMAP_TIMER_CTRL_PRE             (1 << 5)        /* prescaler enable */
  66 #define OMAP_TIMER_CTRL_PTV_SHIFT       2               /* how much to shift the prescaler value */
  67 #define OMAP_TIMER_CTRL_AR              (1 << 1)        /* auto-reload enable */
  68 #define OMAP_TIMER_CTRL_ST              (1 << 0)        /* start timer */
  69
  70 struct omap_dm_timer {
  71         unsigned long phys_base;
  72         int irq;
  73 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  74         struct clk *iclk, *fclk;
  75 #endif
  76         void __iomem *io_base;
  77         unsigned reserved:1;
  78         unsigned enabled:1;
  79 };
  80
  81 #ifdef CONFIG_ARCH_OMAP1
  82
  83 #define omap_dm_clk_enable(x)
  84 #define omap_dm_clk_disable(x)
  85 #define omap2_dm_timers                 NULL
  86 #define omap2_dm_source_names           NULL
  87 #define omap2_dm_source_clocks          NULL
  88 #define omap3_dm_timers                 NULL
  89 #define omap3_dm_source_names           NULL
  90 #define omap3_dm_source_clocks          NULL
  91
  92 static struct omap_dm_timer omap1_dm_timers[] = {
  93         { .phys_base = 0xfffb1400, .irq = INT_1610_GPTIMER1 },
  94         { .phys_base = 0xfffb1c00, .irq = INT_1610_GPTIMER2 },
  95         { .phys_base = 0xfffb2400, .irq = INT_1610_GPTIMER3 },
  96         { .phys_base = 0xfffb2c00, .irq = INT_1610_GPTIMER4 },
  97         { .phys_base = 0xfffb3400, .irq = INT_1610_GPTIMER5 },
  98         { .phys_base = 0xfffb3c00, .irq = INT_1610_GPTIMER6 },
  99         { .phys_base = 0xfffb7400, .irq = INT_1610_GPTIMER7 },
 100         { .phys_base = 0xfffbd400, .irq = INT_1610_GPTIMER8 },
 101 };
 102
 103 static const int dm_timer_count = ARRAY_SIZE(omap1_dm_timers);
 104
 105 #elif defined(CONFIG_ARCH_OMAP2)
 106
 107 #define omap_dm_clk_enable(x)           clk_enable(x)
 108 #define omap_dm_clk_disable(x)          clk_disable(x)
 109 #define omap1_dm_timers                 NULL
 110 #define omap3_dm_timers                 NULL
 111 #define omap3_dm_source_names           NULL
 112 #define omap3_dm_source_clocks          NULL
 113
 114 static struct omap_dm_timer omap2_dm_timers[] = {
 115         { .phys_base = 0x48028000, .irq = INT_24XX_GPTIMER1 },
 116         { .phys_base = 0x4802a000, .irq = INT_24XX_GPTIMER2 },
 117         { .phys_base = 0x48078000, .irq = INT_24XX_GPTIMER3 },
 118         { .phys_base = 0x4807a000, .irq = INT_24XX_GPTIMER4 },
 119         { .phys_base = 0x4807c000, .irq = INT_24XX_GPTIMER5 },
 120         { .phys_base = 0x4807e000, .irq = INT_24XX_GPTIMER6 },
 121         { .phys_base = 0x48080000, .irq = INT_24XX_GPTIMER7 },
 122         { .phys_base = 0x48082000, .irq = INT_24XX_GPTIMER8 },
 123         { .phys_base = 0x48084000, .irq = INT_24XX_GPTIMER9 },
 124         { .phys_base = 0x48086000, .irq = INT_24XX_GPTIMER10 },
 125         { .phys_base = 0x48088000, .irq = INT_24XX_GPTIMER11 },
 126         { .phys_base = 0x4808a000, .irq = INT_24XX_GPTIMER12 },
 127 };
 128
 129 static const char *omap2_dm_source_names[] __initdata = {
 130         "sys_ck",
 131         "func_32k_ck",
 132         "alt_ck",
 133         NULL
 134 };
 135
 136 static struct clk **omap2_dm_source_clocks[3];
 137 static const int dm_timer_count = ARRAY_SIZE(omap2_dm_timers);
 138
 139 #elif defined(CONFIG_ARCH_OMAP3)
 140
 141 #define omap_dm_clk_enable(x)           clk_enable(x)
 142 #define omap_dm_clk_disable(x)          clk_disable(x)
 143 #define omap1_dm_timers                 NULL
 144 #define omap2_dm_timers                 NULL
 145 #define omap2_dm_source_names           NULL
 146 #define omap2_dm_source_clocks          NULL
 147
 148 static struct omap_dm_timer omap3_dm_timers[] = {
 149         { .phys_base = 0x48318000, .irq = INT_24XX_GPTIMER1 },
 150         { .phys_base = 0x49032000, .irq = INT_24XX_GPTIMER2 },
 151         { .phys_base = 0x49034000, .irq = INT_24XX_GPTIMER3 },
 152         { .phys_base = 0x49036000, .irq = INT_24XX_GPTIMER4 },
 153         { .phys_base = 0x49038000, .irq = INT_24XX_GPTIMER5 },
 154         { .phys_base = 0x4903A000, .irq = INT_24XX_GPTIMER6 },
 155         { .phys_base = 0x4903C000, .irq = INT_24XX_GPTIMER7 },
 156         { .phys_base = 0x4903E000, .irq = INT_24XX_GPTIMER8 },
 157         { .phys_base = 0x49040000, .irq = INT_24XX_GPTIMER9 },
 158         { .phys_base = 0x48086000, .irq = INT_24XX_GPTIMER10 },
 159         { .phys_base = 0x48088000, .irq = INT_24XX_GPTIMER11 },
 160         { .phys_base = 0x48304000, .irq = INT_24XX_GPTIMER12 },
 161 };
 162
 163 static const char *omap3_dm_source_names[] __initdata = {
 164         "sys_ck",
 165         "omap_32k_fck",
 166         NULL
 167 };
 168
 169 static struct clk **omap3_dm_source_clocks[2];
 170 static const int dm_timer_count = ARRAY_SIZE(omap3_dm_timers);
 171
 172 #else
 173
 174 #error OMAP architecture not supported!
 175
 176 #endif
 177
 178 static struct omap_dm_timer *dm_timers;
 179 static char **dm_source_names;
 180 static struct clk **dm_source_clocks;
 181
 182 static spinlock_t dm_timer_lock;
 183
 184 static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg)
 185 {
 186         return readl(timer->io_base + reg);
 187 }
 188
 189 static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value)
 190 {
 191         writel(value, timer->io_base + reg);
 192         while (omap_dm_timer_read_reg(timer, OMAP_TIMER_WRITE_PEND_REG))
 193                 ;
 194 }
 195
 196 static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
 197 {
 198         int c;
 199
 200         c = 0;
 201         while (!(omap_dm_timer_read_reg(timer, OMAP_TIMER_SYS_STAT_REG) & 1)) {
 202                 c++;
 203                 if (c > 100000) {
 204                         printk(KERN_ERR "Timer failed to reset\n");
 205                         return;
 206                 }
 207         }
 208 }
 209
 210 static void omap_dm_timer_reset(struct omap_dm_timer *timer)
 211 {
 212         u32 l;
 213
 214         if (!cpu_class_is_omap2() || timer != &dm_timers[0]) {
 215                 omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
 216                 omap_dm_timer_wait_for_reset(timer);
 217         }
 218         omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
 219
 220         /* Set to smart-idle mode */
 221         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG);
 222         l |= 0x02 << 3;
 223
 224         if (cpu_class_is_omap2() && timer == &dm_timers[0]) {
 225                 /* Enable wake-up only for GPT1 on OMAP2 CPUs*/
 226                 l |= 1 << 2;
 227                 /* Non-posted mode */
 228                 omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0);
 229         }
 230         omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l);
 231 }
 232
 233 static void omap_dm_timer_prepare(struct omap_dm_timer *timer)
 234 {
 235         omap_dm_timer_enable(timer);
 236         omap_dm_timer_reset(timer);
 237 }
 238
 239 struct omap_dm_timer *omap_dm_timer_request(void)
 240 {
 241         struct omap_dm_timer *timer = NULL;
 242         unsigned long flags;
 243         int i;
 244
 245         spin_lock_irqsave(&dm_timer_lock, flags);
 246         for (i = 0; i < dm_timer_count; i++) {
 247                 if (dm_timers[i].reserved)
 248                         continue;
 249
 250                 timer = &dm_timers[i];
 251                 timer->reserved = 1;
 252                 break;
 253         }
 254         spin_unlock_irqrestore(&dm_timer_lock, flags);
 255
 256         if (timer != NULL)
 257                 omap_dm_timer_prepare(timer);
 258
 259         return timer;
 260 }
 261
 262 struct omap_dm_timer *omap_dm_timer_request_specific(int id)
 263 {
 264         struct omap_dm_timer *timer;
 265         unsigned long flags;
 266
 267         spin_lock_irqsave(&dm_timer_lock, flags);
 268         if (id <= 0 || id > dm_timer_count || dm_timers[id-1].reserved) {
 269                 spin_unlock_irqrestore(&dm_timer_lock, flags);
 270                 printk("BUG: warning at %s:%d/%s(): unable to get timer %d\n",
 271                        __FILE__, __LINE__, __func__, id);
 272                 dump_stack();
 273                 return NULL;
 274         }
 275
 276         timer = &dm_timers[id-1];
 277         timer->reserved = 1;
 278         spin_unlock_irqrestore(&dm_timer_lock, flags);
 279
 280         omap_dm_timer_prepare(timer);
 281
 282         return timer;
 283 }
 284
 285 void omap_dm_timer_free(struct omap_dm_timer *timer)
 286 {
 287         omap_dm_timer_enable(timer);
 288         omap_dm_timer_reset(timer);
 289         omap_dm_timer_disable(timer);
 290
 291         WARN_ON(!timer->reserved);
 292         timer->reserved = 0;
 293 }
 294
 295 void omap_dm_timer_enable(struct omap_dm_timer *timer)
 296 {
 297         if (timer->enabled)
 298                 return;
 299
 300         omap_dm_clk_enable(timer->fclk);
 301         omap_dm_clk_enable(timer->iclk);
 302
 303         timer->enabled = 1;
 304 }
 305
 306 void omap_dm_timer_disable(struct omap_dm_timer *timer)
 307 {
 308         if (!timer->enabled)
 309                 return;
 310
 311         omap_dm_clk_disable(timer->iclk);
 312         omap_dm_clk_disable(timer->fclk);
 313
 314         timer->enabled = 0;
 315 }
 316
 317 int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
 318 {
 319         return timer->irq;
 320 }
 321
 322 #if defined(CONFIG_ARCH_OMAP1)
 323
 324 /**
 325  * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
 326  * @inputmask: current value of idlect mask
 327  */
 328 __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
 329 {
 330         int i;
 331
 332         /* If ARMXOR cannot be idled this function call is unnecessary */
 333         if (!(inputmask & (1 << 1)))
 334                 return inputmask;
 335
 336         /* If any active timer is using ARMXOR return modified mask */
 337         for (i = 0; i < dm_timer_count; i++) {
 338                 u32 l;
 339
 340                 l = omap_dm_timer_read_reg(&dm_timers[i], OMAP_TIMER_CTRL_REG);
 341                 if (l & OMAP_TIMER_CTRL_ST) {
 342                         if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0)
 343                                 inputmask &= ~(1 << 1);
 344                         else
 345                                 inputmask &= ~(1 << 2);
 346                 }
 347         }
 348
 349         return inputmask;
 350 }
 351
 352 #elif defined(CONFIG_ARCH_OMAP2) || defined (CONFIG_ARCH_OMAP3)
 353
 354 struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
 355 {
 356         return timer->fclk;
 357 }
 358
 359 __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
 360 {
 361         BUG();
 362
 363         return 0;
 364 }
 365
 366 #endif
 367
 368 void omap_dm_timer_trigger(struct omap_dm_timer *timer)
 369 {
 370         omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
 371 }
 372
 373 void omap_dm_timer_start(struct omap_dm_timer *timer)
 374 {
 375         u32 l;
 376
 377         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 378         if (!(l & OMAP_TIMER_CTRL_ST)) {
 379                 l |= OMAP_TIMER_CTRL_ST;
 380                 omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 381         }
 382 }
 383
 384 void omap_dm_timer_stop(struct omap_dm_timer *timer)
 385 {
 386         u32 l;
 387
 388         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 389         if (l & OMAP_TIMER_CTRL_ST) {
 390                 l &= ~0x1;
 391                 omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 392         }
 393 }
 394
 395 #ifdef CONFIG_ARCH_OMAP1
 396
 397 void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 398 {
 399         int n = (timer - dm_timers) << 1;
 400         u32 l;
 401
 402         l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
 403         l |= source << n;
 404         omap_writel(l, MOD_CONF_CTRL_1);
 405 }
 406
 407 #else
 408
 409 void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
 410 {
 411         if (source < 0 || source >= 3)
 412                 return;
 413
 414         clk_disable(timer->fclk);
 415         clk_set_parent(timer->fclk, dm_source_clocks[source]);
 416         clk_enable(timer->fclk);
 417
 418         /* When the functional clock disappears, too quick writes seem to
 419          * cause an abort. */
 420         __delay(150000);
 421 }
 422
 423 #endif
 424
 425 void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
 426                             unsigned int load)
 427 {
 428         u32 l;
 429
 430         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 431         if (autoreload)
 432                 l |= OMAP_TIMER_CTRL_AR;
 433         else
 434                 l &= ~OMAP_TIMER_CTRL_AR;
 435         omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 436         omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
 437         omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
 438 }
 439
 440 void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
 441                              unsigned int match)
 442 {
 443         u32 l;
 444
 445         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 446         if (enable)
 447                 l |= OMAP_TIMER_CTRL_CE;
 448         else
 449                 l &= ~OMAP_TIMER_CTRL_CE;
 450         omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 451         omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
 452 }
 453
 454
 455 void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 456                            int toggle, int trigger)
 457 {
 458         u32 l;
 459
 460         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 461         l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
 462                OMAP_TIMER_CTRL_PT | (0x03 << 10));
 463         if (def_on)
 464                 l |= OMAP_TIMER_CTRL_SCPWM;
 465         if (toggle)
 466                 l |= OMAP_TIMER_CTRL_PT;
 467         l |= trigger << 10;
 468         omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 469 }
 470
 471 void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
 472 {
 473         u32 l;
 474
 475         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
 476         l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
 477         if (prescaler >= 0x00 && prescaler <= 0x07) {
 478                 l |= OMAP_TIMER_CTRL_PRE;
 479                 l |= prescaler << 2;
 480         }
 481         omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
 482 }
 483
 484 void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
 485                                   unsigned int value)
 486 {
 487         omap_dm_timer_write_reg(timer, OMAP_TIMER_INT_EN_REG, value);
 488         omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, value);
 489 }
 490
 491 unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
 492 {
 493         unsigned int l;
 494
 495         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_STAT_REG);
 496
 497         return l;
 498 }
 499
 500 void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
 501 {
 502         omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG, value);
 503 }
 504
 505 unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
 506 {
 507         unsigned int l;
 508
 509         l = omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG);
 510
 511         return l;
 512 }
 513
 514 void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
 515 {
 516         omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
 517 }
 518
 519 int omap_dm_timers_active(void)
 520 {
 521         int i;
 522
 523         for (i = 0; i < dm_timer_count; i++) {
 524                 struct omap_dm_timer *timer;
 525
 526                 timer = &dm_timers[i];
 527
 528                 if (!timer->enabled)
 529                         continue;
 530
 531                 if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) &
 532                     OMAP_TIMER_CTRL_ST) {
 533                         return 1;
 534                 }
 535         }
 536         return 0;
 537 }
 538
 539 int __init omap_dm_timer_init(void)
 540 {
 541         struct omap_dm_timer *timer;
 542         int i;
 543
 544         if (!(cpu_is_omap16xx() || cpu_class_is_omap2()))
 545                 return -ENODEV;
 546
 547         spin_lock_init(&dm_timer_lock);
 548
 549         if (cpu_class_is_omap1())
 550                 dm_timers = omap1_dm_timers;
 551         else if (cpu_is_omap24xx()) {
 552                 dm_timers = omap2_dm_timers;
 553                 dm_source_names = (char **)omap2_dm_source_names;
 554                 dm_source_clocks = (struct clk **)omap2_dm_source_clocks;
 555         } else if (cpu_is_omap34xx()) {
 556                 dm_timers = omap3_dm_timers;
 557                 dm_source_names = (char **)omap3_dm_source_names;
 558                 dm_source_clocks = (struct clk **)omap3_dm_source_clocks;
 559         }
 560
 561         if (cpu_class_is_omap2())
 562                 for (i = 0; dm_source_names[i] != NULL; i++)
 563                         dm_source_clocks[i] = clk_get(NULL, dm_source_names[i]);
 564
 565         if (cpu_is_omap243x())
 566                 dm_timers[0].phys_base = 0x49018000;
 567
 568         for (i = 0; i < dm_timer_count; i++) {
 569                 timer = &dm_timers[i];
 570                 timer->io_base = (void __iomem *)io_p2v(timer->phys_base);
 571 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 572                 if (cpu_class_is_omap2()) {
 573                         char clk_name[16];
 574                         sprintf(clk_name, "gpt%d_ick", i + 1);
 575                         timer->iclk = clk_get(NULL, clk_name);
 576                         sprintf(clk_name, "gpt%d_fck", i + 1);
 577                         timer->fclk = clk_get(NULL, clk_name);
 578                 }
 579 #endif
 580         }
 581
 582         return 0;
 583 }