arch/arm/mach-realview/core.c

   1 /*
   2  *  linux/arch/arm/mach-realview/core.c
   3  *
   4  *  Copyright (C) 1999 - 2003 ARM Limited
   5  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21 #include <linux/init.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/sysdev.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/amba/bus.h>
  27 #include <linux/amba/clcd.h>
  28 #include <linux/clocksource.h>
  29 #include <linux/clockchips.h>
  30
  31 #include <asm/system.h>
  32 #include <asm/hardware.h>
  33 #include <asm/io.h>
  34 #include <asm/irq.h>
  35 #include <asm/leds.h>
  36 #include <asm/hardware/arm_timer.h>
  37 #include <asm/hardware/icst307.h>
  38
  39 #include <asm/mach/arch.h>
  40 #include <asm/mach/flash.h>
  41 #include <asm/mach/irq.h>
  42 #include <asm/mach/map.h>
  43 #include <asm/mach/mmc.h>
  44
  45 #include <asm/hardware/gic.h>
  46
  47 #include "core.h"
  48 #include "clock.h"
  49
  50 #define REALVIEW_REFCOUNTER     (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET)
  51
  52 /* used by entry-macro.S */
  53 void __iomem *gic_cpu_base_addr;
  54
  55 /*
  56  * This is the RealView sched_clock implementation.  This has
  57  * a resolution of 41.7ns, and a maximum value of about 179s.
  58  */
  59 unsigned long long sched_clock(void)
  60 {
  61         unsigned long long v;
  62
  63         v = (unsigned long long)readl(REALVIEW_REFCOUNTER) * 125;
  64         do_div(v, 3);
  65
  66         return v;
  67 }
  68
  69
  70 #define REALVIEW_FLASHCTRL    (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
  71
  72 static int realview_flash_init(void)
  73 {
  74         u32 val;
  75
  76         val = __raw_readl(REALVIEW_FLASHCTRL);
  77         val &= ~REALVIEW_FLASHPROG_FLVPPEN;
  78         __raw_writel(val, REALVIEW_FLASHCTRL);
  79
  80         return 0;
  81 }
  82
  83 static void realview_flash_exit(void)
  84 {
  85         u32 val;
  86
  87         val = __raw_readl(REALVIEW_FLASHCTRL);
  88         val &= ~REALVIEW_FLASHPROG_FLVPPEN;
  89         __raw_writel(val, REALVIEW_FLASHCTRL);
  90 }
  91
  92 static void realview_flash_set_vpp(int on)
  93 {
  94         u32 val;
  95
  96         val = __raw_readl(REALVIEW_FLASHCTRL);
  97         if (on)
  98                 val |= REALVIEW_FLASHPROG_FLVPPEN;
  99         else
 100                 val &= ~REALVIEW_FLASHPROG_FLVPPEN;
 101         __raw_writel(val, REALVIEW_FLASHCTRL);
 102 }
 103
 104 static struct flash_platform_data realview_flash_data = {
 105         .map_name               = "cfi_probe",
 106         .width                  = 4,
 107         .init                   = realview_flash_init,
 108         .exit                   = realview_flash_exit,
 109         .set_vpp                = realview_flash_set_vpp,
 110 };
 111
 112 static struct resource realview_flash_resource = {
 113         .start                  = REALVIEW_FLASH_BASE,
 114         .end                    = REALVIEW_FLASH_BASE + REALVIEW_FLASH_SIZE,
 115         .flags                  = IORESOURCE_MEM,
 116 };
 117
 118 struct platform_device realview_flash_device = {
 119         .name                   = "armflash",
 120         .id                     = 0,
 121         .dev                    = {
 122                 .platform_data  = &realview_flash_data,
 123         },
 124         .num_resources          = 1,
 125         .resource               = &realview_flash_resource,
 126 };
 127
 128 static struct resource realview_i2c_resource = {
 129         .start          = REALVIEW_I2C_BASE,
 130         .end            = REALVIEW_I2C_BASE + SZ_4K - 1,
 131         .flags          = IORESOURCE_MEM,
 132 };
 133
 134 struct platform_device realview_i2c_device = {
 135         .name           = "versatile-i2c",
 136         .id             = -1,
 137         .num_resources  = 1,
 138         .resource       = &realview_i2c_resource,
 139 };
 140
 141 #define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET)
 142
 143 static unsigned int realview_mmc_status(struct device *dev)
 144 {
 145         struct amba_device *adev = container_of(dev, struct amba_device, dev);
 146         u32 mask;
 147
 148         if (adev->res.start == REALVIEW_MMCI0_BASE)
 149                 mask = 1;
 150         else
 151                 mask = 2;
 152
 153         return readl(REALVIEW_SYSMCI) & mask;
 154 }
 155
 156 struct mmc_platform_data realview_mmc0_plat_data = {
 157         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 158         .status         = realview_mmc_status,
 159 };
 160
 161 struct mmc_platform_data realview_mmc1_plat_data = {
 162         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 163         .status         = realview_mmc_status,
 164 };
 165
 166 /*
 167  * Clock handling
 168  */
 169 static const struct icst307_params realview_oscvco_params = {
 170         .ref            = 24000,
 171         .vco_max        = 200000,
 172         .vd_min         = 4 + 8,
 173         .vd_max         = 511 + 8,
 174         .rd_min         = 1 + 2,
 175         .rd_max         = 127 + 2,
 176 };
 177
 178 static void realview_oscvco_set(struct clk *clk, struct icst307_vco vco)
 179 {
 180         void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET;
 181         void __iomem *sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC4_OFFSET;
 182         u32 val;
 183
 184         val = readl(sys_osc) & ~0x7ffff;
 185         val |= vco.v | (vco.r << 9) | (vco.s << 16);
 186
 187         writel(0xa05f, sys_lock);
 188         writel(val, sys_osc);
 189         writel(0, sys_lock);
 190 }
 191
 192 struct clk realview_clcd_clk = {
 193         .name   = "CLCDCLK",
 194         .params = &realview_oscvco_params,
 195         .setvco = realview_oscvco_set,
 196 };
 197
 198 /*
 199  * CLCD support.
 200  */
 201 #define SYS_CLCD_NLCDIOON       (1 << 2)
 202 #define SYS_CLCD_VDDPOSSWITCH   (1 << 3)
 203 #define SYS_CLCD_PWR3V5SWITCH   (1 << 4)
 204 #define SYS_CLCD_ID_MASK        (0x1f << 8)
 205 #define SYS_CLCD_ID_SANYO_3_8   (0x00 << 8)
 206 #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
 207 #define SYS_CLCD_ID_EPSON_2_2   (0x02 << 8)
 208 #define SYS_CLCD_ID_SANYO_2_5   (0x07 << 8)
 209 #define SYS_CLCD_ID_VGA         (0x1f << 8)
 210
 211 static struct clcd_panel vga = {
 212         .mode           = {
 213                 .name           = "VGA",
 214                 .refresh        = 60,
 215                 .xres           = 640,
 216                 .yres           = 480,
 217                 .pixclock       = 39721,
 218                 .left_margin    = 40,
 219                 .right_margin   = 24,
 220                 .upper_margin   = 32,
 221                 .lower_margin   = 11,
 222                 .hsync_len      = 96,
 223                 .vsync_len      = 2,
 224                 .sync           = 0,
 225                 .vmode          = FB_VMODE_NONINTERLACED,
 226         },
 227         .width          = -1,
 228         .height         = -1,
 229         .tim2           = TIM2_BCD | TIM2_IPC,
 230         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 231         .bpp            = 16,
 232 };
 233
 234 static struct clcd_panel sanyo_3_8_in = {
 235         .mode           = {
 236                 .name           = "Sanyo QVGA",
 237                 .refresh        = 116,
 238                 .xres           = 320,
 239                 .yres           = 240,
 240                 .pixclock       = 100000,
 241                 .left_margin    = 6,
 242                 .right_margin   = 6,
 243                 .upper_margin   = 5,
 244                 .lower_margin   = 5,
 245                 .hsync_len      = 6,
 246                 .vsync_len      = 6,
 247                 .sync           = 0,
 248                 .vmode          = FB_VMODE_NONINTERLACED,
 249         },
 250         .width          = -1,
 251         .height         = -1,
 252         .tim2           = TIM2_BCD,
 253         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 254         .bpp            = 16,
 255 };
 256
 257 static struct clcd_panel sanyo_2_5_in = {
 258         .mode           = {
 259                 .name           = "Sanyo QVGA Portrait",
 260                 .refresh        = 116,
 261                 .xres           = 240,
 262                 .yres           = 320,
 263                 .pixclock       = 100000,
 264                 .left_margin    = 20,
 265                 .right_margin   = 10,
 266                 .upper_margin   = 2,
 267                 .lower_margin   = 2,
 268                 .hsync_len      = 10,
 269                 .vsync_len      = 2,
 270                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 271                 .vmode          = FB_VMODE_NONINTERLACED,
 272         },
 273         .width          = -1,
 274         .height         = -1,
 275         .tim2           = TIM2_IVS | TIM2_IHS | TIM2_IPC,
 276         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 277         .bpp            = 16,
 278 };
 279
 280 static struct clcd_panel epson_2_2_in = {
 281         .mode           = {
 282                 .name           = "Epson QCIF",
 283                 .refresh        = 390,
 284                 .xres           = 176,
 285                 .yres           = 220,
 286                 .pixclock       = 62500,
 287                 .left_margin    = 3,
 288                 .right_margin   = 2,
 289                 .upper_margin   = 1,
 290                 .lower_margin   = 0,
 291                 .hsync_len      = 3,
 292                 .vsync_len      = 2,
 293                 .sync           = 0,
 294                 .vmode          = FB_VMODE_NONINTERLACED,
 295         },
 296         .width          = -1,
 297         .height         = -1,
 298         .tim2           = TIM2_BCD | TIM2_IPC,
 299         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 300         .bpp            = 16,
 301 };
 302
 303 /*
 304  * Detect which LCD panel is connected, and return the appropriate
 305  * clcd_panel structure.  Note: we do not have any information on
 306  * the required timings for the 8.4in panel, so we presently assume
 307  * VGA timings.
 308  */
 309 static struct clcd_panel *realview_clcd_panel(void)
 310 {
 311         void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
 312         struct clcd_panel *panel = &vga;
 313         u32 val;
 314
 315         val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
 316         if (val == SYS_CLCD_ID_SANYO_3_8)
 317                 panel = &sanyo_3_8_in;
 318         else if (val == SYS_CLCD_ID_SANYO_2_5)
 319                 panel = &sanyo_2_5_in;
 320         else if (val == SYS_CLCD_ID_EPSON_2_2)
 321                 panel = &epson_2_2_in;
 322         else if (val == SYS_CLCD_ID_VGA)
 323                 panel = &vga;
 324         else {
 325                 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
 326                         val);
 327                 panel = &vga;
 328         }
 329
 330         return panel;
 331 }
 332
 333 /*
 334  * Disable all display connectors on the interface module.
 335  */
 336 static void realview_clcd_disable(struct clcd_fb *fb)
 337 {
 338         void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
 339         u32 val;
 340
 341         val = readl(sys_clcd);
 342         val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
 343         writel(val, sys_clcd);
 344 }
 345
 346 /*
 347  * Enable the relevant connector on the interface module.
 348  */
 349 static void realview_clcd_enable(struct clcd_fb *fb)
 350 {
 351         void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
 352         u32 val;
 353
 354         /*
 355          * Enable the PSUs
 356          */
 357         val = readl(sys_clcd);
 358         val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
 359         writel(val, sys_clcd);
 360 }
 361
 362 static unsigned long framesize = SZ_1M;
 363
 364 static int realview_clcd_setup(struct clcd_fb *fb)
 365 {
 366         dma_addr_t dma;
 367
 368         fb->panel               = realview_clcd_panel();
 369
 370         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
 371                                                     &dma, GFP_KERNEL);
 372         if (!fb->fb.screen_base) {
 373                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
 374                 return -ENOMEM;
 375         }
 376
 377         fb->fb.fix.smem_start   = dma;
 378         fb->fb.fix.smem_len     = framesize;
 379
 380         return 0;
 381 }
 382
 383 static int realview_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 384 {
 385         return dma_mmap_writecombine(&fb->dev->dev, vma,
 386                                      fb->fb.screen_base,
 387                                      fb->fb.fix.smem_start,
 388                                      fb->fb.fix.smem_len);
 389 }
 390
 391 static void realview_clcd_remove(struct clcd_fb *fb)
 392 {
 393         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 394                               fb->fb.screen_base, fb->fb.fix.smem_start);
 395 }
 396
 397 struct clcd_board clcd_plat_data = {
 398         .name           = "RealView",
 399         .check          = clcdfb_check,
 400         .decode         = clcdfb_decode,
 401         .disable        = realview_clcd_disable,
 402         .enable         = realview_clcd_enable,
 403         .setup          = realview_clcd_setup,
 404         .mmap           = realview_clcd_mmap,
 405         .remove         = realview_clcd_remove,
 406 };
 407
 408 #ifdef CONFIG_LEDS
 409 #define VA_LEDS_BASE (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET)
 410
 411 void realview_leds_event(led_event_t ledevt)
 412 {
 413         unsigned long flags;
 414         u32 val;
 415
 416         local_irq_save(flags);
 417         val = readl(VA_LEDS_BASE);
 418
 419         switch (ledevt) {
 420         case led_idle_start:
 421                 val = val & ~REALVIEW_SYS_LED0;
 422                 break;
 423
 424         case led_idle_end:
 425                 val = val | REALVIEW_SYS_LED0;
 426                 break;
 427
 428         case led_timer:
 429                 val = val ^ REALVIEW_SYS_LED1;
 430                 break;
 431
 432         case led_halted:
 433                 val = 0;
 434                 break;
 435
 436         default:
 437                 break;
 438         }
 439
 440         writel(val, VA_LEDS_BASE);
 441         local_irq_restore(flags);
 442 }
 443 #endif  /* CONFIG_LEDS */
 444
 445 /*
 446  * Where is the timer (VA)?
 447  */
 448 #define TIMER0_VA_BASE           __io_address(REALVIEW_TIMER0_1_BASE)
 449 #define TIMER1_VA_BASE          (__io_address(REALVIEW_TIMER0_1_BASE) + 0x20)
 450 #define TIMER2_VA_BASE           __io_address(REALVIEW_TIMER2_3_BASE)
 451 #define TIMER3_VA_BASE          (__io_address(REALVIEW_TIMER2_3_BASE) + 0x20)
 452
 453 /*
 454  * How long is the timer interval?
 455  */
 456 #define TIMER_INTERVAL  (TICKS_PER_uSEC * mSEC_10)
 457 #if TIMER_INTERVAL >= 0x100000
 458 #define TIMER_RELOAD    (TIMER_INTERVAL >> 8)
 459 #define TIMER_DIVISOR   (TIMER_CTRL_DIV256)
 460 #define TICKS2USECS(x)  (256 * (x) / TICKS_PER_uSEC)
 461 #elif TIMER_INTERVAL >= 0x10000
 462 #define TIMER_RELOAD    (TIMER_INTERVAL >> 4)           /* Divide by 16 */
 463 #define TIMER_DIVISOR   (TIMER_CTRL_DIV16)
 464 #define TICKS2USECS(x)  (16 * (x) / TICKS_PER_uSEC)
 465 #else
 466 #define TIMER_RELOAD    (TIMER_INTERVAL)
 467 #define TIMER_DIVISOR   (TIMER_CTRL_DIV1)
 468 #define TICKS2USECS(x)  ((x) / TICKS_PER_uSEC)
 469 #endif
 470
 471 static void timer_set_mode(enum clock_event_mode mode,
 472                            struct clock_event_device *clk)
 473 {
 474         unsigned long ctrl;
 475
 476         switch(mode) {
 477         case CLOCK_EVT_MODE_PERIODIC:
 478                 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
 479
 480                 ctrl = TIMER_CTRL_PERIODIC;
 481                 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE;
 482                 break;
 483         case CLOCK_EVT_MODE_ONESHOT:
 484                 /* period set, and timer enabled in 'next_event' hook */
 485                 ctrl = TIMER_CTRL_ONESHOT;
 486                 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE;
 487                 break;
 488         case CLOCK_EVT_MODE_UNUSED:
 489         case CLOCK_EVT_MODE_SHUTDOWN:
 490         default:
 491                 ctrl = 0;
 492         }
 493
 494         writel(ctrl, TIMER0_VA_BASE + TIMER_CTRL);
 495 }
 496
 497 static int timer_set_next_event(unsigned long evt,
 498                                 struct clock_event_device *unused)
 499 {
 500         unsigned long ctrl = readl(TIMER0_VA_BASE + TIMER_CTRL);
 501
 502         writel(evt, TIMER0_VA_BASE + TIMER_LOAD);
 503         writel(ctrl | TIMER_CTRL_ENABLE, TIMER0_VA_BASE + TIMER_CTRL);
 504
 505         return 0;
 506 }
 507
 508 static struct clock_event_device timer0_clockevent =     {
 509         .name           = "timer0",
 510         .shift          = 32,
 511         .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 512         .set_mode       = timer_set_mode,
 513         .set_next_event = timer_set_next_event,
 514         .rating         = 300,
 515         .cpumask        = CPU_MASK_ALL,
 516 };
 517
 518 static void __init realview_clockevents_init(unsigned int timer_irq)
 519 {
 520         timer0_clockevent.irq = timer_irq;
 521         timer0_clockevent.mult =
 522                 div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift);
 523         timer0_clockevent.max_delta_ns =
 524                 clockevent_delta2ns(0xffffffff, &timer0_clockevent);
 525         timer0_clockevent.min_delta_ns =
 526                 clockevent_delta2ns(0xf, &timer0_clockevent);
 527
 528         clockevents_register_device(&timer0_clockevent);
 529 }
 530
 531 /*
 532  * IRQ handler for the timer
 533  */
 534 static irqreturn_t realview_timer_interrupt(int irq, void *dev_id)
 535 {
 536         struct clock_event_device *evt = &timer0_clockevent;
 537
 538         /* clear the interrupt */
 539         writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
 540
 541         evt->event_handler(evt);
 542
 543         return IRQ_HANDLED;
 544 }
 545
 546 static struct irqaction realview_timer_irq = {
 547         .name           = "RealView Timer Tick",
 548         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 549         .handler        = realview_timer_interrupt,
 550 };
 551
 552 static cycle_t realview_get_cycles(void)
 553 {
 554         return ~readl(TIMER3_VA_BASE + TIMER_VALUE);
 555 }
 556
 557 static struct clocksource clocksource_realview = {
 558         .name   = "timer3",
 559         .rating = 200,
 560         .read   = realview_get_cycles,
 561         .mask   = CLOCKSOURCE_MASK(32),
 562         .shift  = 20,
 563         .flags  = CLOCK_SOURCE_IS_CONTINUOUS,
 564 };
 565
 566 static void __init realview_clocksource_init(void)
 567 {
 568         /* setup timer 0 as free-running clocksource */
 569         writel(0, TIMER3_VA_BASE + TIMER_CTRL);
 570         writel(0xffffffff, TIMER3_VA_BASE + TIMER_LOAD);
 571         writel(0xffffffff, TIMER3_VA_BASE + TIMER_VALUE);
 572         writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
 573                 TIMER3_VA_BASE + TIMER_CTRL);
 574
 575         clocksource_realview.mult =
 576                 clocksource_khz2mult(1000, clocksource_realview.shift);
 577         clocksource_register(&clocksource_realview);
 578 }
 579
 580 /*
 581  * Set up the clock source and clock events devices
 582  */
 583 void __init realview_timer_init(unsigned int timer_irq)
 584 {
 585         u32 val;
 586
 587 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
 588         /*
 589          * The dummy clock device has to be registered before the main device
 590          * so that the latter will broadcast the clock events
 591          */
 592         local_timer_setup(smp_processor_id());
 593 #endif
 594
 595         /*
 596          * set clock frequency:
 597          *      REALVIEW_REFCLK is 32KHz
 598          *      REALVIEW_TIMCLK is 1MHz
 599          */
 600         val = readl(__io_address(REALVIEW_SCTL_BASE));
 601         writel((REALVIEW_TIMCLK << REALVIEW_TIMER1_EnSel) |
 602                (REALVIEW_TIMCLK << REALVIEW_TIMER2_EnSel) |
 603                (REALVIEW_TIMCLK << REALVIEW_TIMER3_EnSel) |
 604                (REALVIEW_TIMCLK << REALVIEW_TIMER4_EnSel) | val,
 605                __io_address(REALVIEW_SCTL_BASE));
 606
 607         /*
 608          * Initialise to a known state (all timers off)
 609          */
 610         writel(0, TIMER0_VA_BASE + TIMER_CTRL);
 611         writel(0, TIMER1_VA_BASE + TIMER_CTRL);
 612         writel(0, TIMER2_VA_BASE + TIMER_CTRL);
 613         writel(0, TIMER3_VA_BASE + TIMER_CTRL);
 614
 615         /*
 616          * Make irqs happen for the system timer
 617          */
 618         setup_irq(timer_irq, &realview_timer_irq);
 619
 620         realview_clocksource_init();
 621         realview_clockevents_init(timer_irq);
 622 }