LXR linux/drivers/video/fbdev/au1100fb.c

   1/*
   2 * BRIEF MODULE DESCRIPTION
   3 *      Au1100 LCD Driver.
   4 *
   5 * Rewritten for 2.6 by Embedded Alley Solutions
   6 *      <source@embeddedalley.com>, based on submissions by
   7 *      Karl Lessard <klessard@sunrisetelecom.com>
   8 *      <c.pellegrin@exadron.com>
   9 *
  10 * PM support added by Rodolfo Giometti <giometti@linux.it>
  11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
  12 *
  13 * Copyright 2002 MontaVista Software
  14 * Author: MontaVista Software, Inc.
  15 *              ppopov@mvista.com or source@mvista.com
  16 *
  17 * Copyright 2002 Alchemy Semiconductor
  18 * Author: Alchemy Semiconductor
  19 *
  20 * Based on:
  21 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
  22 *  Created 28 Dec 1997 by Geert Uytterhoeven
  23 *
  24 *  This program is free software; you can redistribute  it and/or modify it
  25 *  under  the terms of  the GNU General  Public License as published by the
  26 *  Free Software Foundation;  either version 2 of the  License, or (at your
  27 *  option) any later version.
  28 *
  29 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  30 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  31 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  32 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  33 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  34 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  35 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  36 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  37 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  38 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39 *
  40 *  You should have received a copy of the  GNU General Public License along
  41 *  with this program; if not, write  to the Free Software Foundation, Inc.,
  42 *  675 Mass Ave, Cambridge, MA 02139, USA.
  43 */
  44#include <linux/clk.h>
  45#include <linux/module.h>
  46#include <linux/kernel.h>
  47#include <linux/errno.h>
  48#include <linux/string.h>
  49#include <linux/mm.h>
  50#include <linux/fb.h>
  51#include <linux/init.h>
  52#include <linux/interrupt.h>
  53#include <linux/ctype.h>
  54#include <linux/dma-mapping.h>
  55#include <linux/platform_device.h>
  56#include <linux/slab.h>
  57
  58#include <asm/mach-au1x00/au1000.h>
  59
  60#define DEBUG 0
  61
  62#include "au1100fb.h"
  63
  64#define DRIVER_NAME "au1100fb"
  65#define DRIVER_DESC "LCD controller driver for AU1100 processors"
  66
  67#define to_au1100fb_device(_info) \
  68          (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  69
  70/* Bitfields format supported by the controller. Note that the order of formats
  71 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  72 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  73 */
  74struct fb_bitfield rgb_bitfields[][4] =
  75{
  76        /*     Red,        Green,        Blue,       Transp   */
  77        { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  78        { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  79        { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  80        { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  81        { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  82
  83        /* The last is used to describe 12bpp format */
  84        { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  85};
  86
  87static struct fb_fix_screeninfo au1100fb_fix = {
  88        .id             = "AU1100 FB",
  89        .xpanstep       = 1,
  90        .ypanstep       = 1,
  91        .type           = FB_TYPE_PACKED_PIXELS,
  92        .accel          = FB_ACCEL_NONE,
  93};
  94
  95static struct fb_var_screeninfo au1100fb_var = {
  96        .activate       = FB_ACTIVATE_NOW,
  97        .height         = -1,
  98        .width          = -1,
  99        .vmode          = FB_VMODE_NONINTERLACED,
 100};
 101
 102/* fb_blank
 103 * Blank the screen. Depending on the mode, the screen will be
 104 * activated with the backlight color, or desactivated
 105 */
 106static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 107{
 108        struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 109
 110        print_dbg("fb_blank %d %p", blank_mode, fbi);
 111
 112        switch (blank_mode) {
 113
 114        case VESA_NO_BLANKING:
 115                /* Turn on panel */
 116                fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 117                wmb(); /* drain writebuffer */
 118                break;
 119
 120        case VESA_VSYNC_SUSPEND:
 121        case VESA_HSYNC_SUSPEND:
 122        case VESA_POWERDOWN:
 123                /* Turn off panel */
 124                fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 125                wmb(); /* drain writebuffer */
 126                break;
 127        default:
 128                break;
 129
 130        }
 131        return 0;
 132}
 133
 134/*
 135 * Set hardware with var settings. This will enable the controller with a specific
 136 * mode, normally validated with the fb_check_var method
 137         */
 138int au1100fb_setmode(struct au1100fb_device *fbdev)
 139{
 140        struct fb_info *info = &fbdev->info;
 141        u32 words;
 142        int index;
 143
 144        if (!fbdev)
 145                return -EINVAL;
 146
 147        /* Update var-dependent FB info */
 148        if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 149                if (info->var.bits_per_pixel <= 8) {
 150                        /* palettized */
 151                        info->var.red.offset    = 0;
 152                        info->var.red.length    = info->var.bits_per_pixel;
 153                        info->var.red.msb_right = 0;
 154
 155                        info->var.green.offset  = 0;
 156                        info->var.green.length  = info->var.bits_per_pixel;
 157                        info->var.green.msb_right = 0;
 158
 159                        info->var.blue.offset   = 0;
 160                        info->var.blue.length   = info->var.bits_per_pixel;
 161                        info->var.blue.msb_right = 0;
 162
 163                        info->var.transp.offset = 0;
 164                        info->var.transp.length = 0;
 165                        info->var.transp.msb_right = 0;
 166
 167                        info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 168                        info->fix.line_length = info->var.xres_virtual /
 169                                                        (8/info->var.bits_per_pixel);
 170                } else {
 171                        /* non-palettized */
 172                        index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 173                        info->var.red = rgb_bitfields[index][0];
 174                        info->var.green = rgb_bitfields[index][1];
 175                        info->var.blue = rgb_bitfields[index][2];
 176                        info->var.transp = rgb_bitfields[index][3];
 177
 178                        info->fix.visual = FB_VISUAL_TRUECOLOR;
 179                        info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 180                }
 181        } else {
 182                /* mono */
 183                info->fix.visual = FB_VISUAL_MONO10;
 184                info->fix.line_length = info->var.xres_virtual / 8;
 185        }
 186
 187        info->screen_size = info->fix.line_length * info->var.yres_virtual;
 188        info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 189                                >> LCD_CONTROL_SM_BIT) * 90;
 190
 191        /* Determine BPP mode and format */
 192        fbdev->regs->lcd_control = fbdev->panel->control_base;
 193        fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 194        fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 195        fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 196        fbdev->regs->lcd_intenable = 0;
 197        fbdev->regs->lcd_intstatus = 0;
 198        fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 199
 200        if (panel_is_dual(fbdev->panel)) {
 201                /* Second panel display seconf half of screen if possible,
 202                 * otherwise display the same as the first panel */
 203                if (info->var.yres_virtual >= (info->var.yres << 1)) {
 204                        fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 205                                                          (info->fix.line_length *
 206                                                          (info->var.yres_virtual >> 1)));
 207                } else {
 208                        fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 209                }
 210        }
 211
 212        words = info->fix.line_length / sizeof(u32);
 213        if (!info->var.rotate || (info->var.rotate == 180)) {
 214                words *= info->var.yres_virtual;
 215                if (info->var.rotate /* 180 */) {
 216                        words -= (words % 8); /* should be divisable by 8 */
 217                }
 218        }
 219        fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 220
 221        fbdev->regs->lcd_pwmdiv = 0;
 222        fbdev->regs->lcd_pwmhi = 0;
 223
 224        /* Resume controller */
 225        fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 226        mdelay(10);
 227        au1100fb_fb_blank(VESA_NO_BLANKING, info);
 228
 229        return 0;
 230}
 231
 232/* fb_setcolreg
 233 * Set color in LCD palette.
 234 */
 235int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 236{
 237        struct au1100fb_device *fbdev;
 238        u32 *palette;
 239        u32 value;
 240
 241        fbdev = to_au1100fb_device(fbi);
 242        palette = fbdev->regs->lcd_pallettebase;
 243
 244        if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 245                return -EINVAL;
 246
 247        if (fbi->var.grayscale) {
 248                /* Convert color to grayscale */
 249                red = green = blue =
 250                        (19595 * red + 38470 * green + 7471 * blue) >> 16;
 251        }
 252
 253        if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 254                /* Place color in the pseudopalette */
 255                if (regno > 16)
 256                        return -EINVAL;
 257
 258                palette = (u32*)fbi->pseudo_palette;
 259
 260                red   >>= (16 - fbi->var.red.length);
 261                green >>= (16 - fbi->var.green.length);
 262                blue  >>= (16 - fbi->var.blue.length);
 263
 264                value = (red   << fbi->var.red.offset)  |
 265                        (green << fbi->var.green.offset)|
 266                        (blue  << fbi->var.blue.offset);
 267                value &= 0xFFFF;
 268
 269        } else if (panel_is_active(fbdev->panel)) {
 270                /* COLOR TFT PALLETTIZED (use RGB 565) */
 271                value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 272                value &= 0xFFFF;
 273
 274        } else if (panel_is_color(fbdev->panel)) {
 275                /* COLOR STN MODE */
 276                value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 277                        ((green >> 8) & 0x00F0) |
 278                        (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 279                value &= 0xFFF;
 280        } else {
 281                /* MONOCHROME MODE */
 282                value = (green >> 12) & 0x000F;
 283                value &= 0xF;
 284        }
 285
 286        palette[regno] = value;
 287
 288        return 0;
 289}
 290
 291/* fb_pan_display
 292 * Pan display in x and/or y as specified
 293 */
 294int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 295{
 296        struct au1100fb_device *fbdev;
 297        int dy;
 298
 299        fbdev = to_au1100fb_device(fbi);
 300
 301        print_dbg("fb_pan_display %p %p", var, fbi);
 302
 303        if (!var || !fbdev) {
 304                return -EINVAL;
 305        }
 306
 307        if (var->xoffset - fbi->var.xoffset) {
 308                /* No support for X panning for now! */
 309                return -EINVAL;
 310        }
 311
 312        print_dbg("fb_pan_display 2 %p %p", var, fbi);
 313        dy = var->yoffset - fbi->var.yoffset;
 314        if (dy) {
 315
 316                u32 dmaaddr;
 317
 318                print_dbg("Panning screen of %d lines", dy);
 319
 320                dmaaddr = fbdev->regs->lcd_dmaaddr0;
 321                dmaaddr += (fbi->fix.line_length * dy);
 322
 323                /* TODO: Wait for current frame to finished */
 324                fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 325
 326                if (panel_is_dual(fbdev->panel)) {
 327                        dmaaddr = fbdev->regs->lcd_dmaaddr1;
 328                        dmaaddr += (fbi->fix.line_length * dy);
 329                        fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 330        }
 331        }
 332        print_dbg("fb_pan_display 3 %p %p", var, fbi);
 333
 334        return 0;
 335}
 336
 337/* fb_mmap
 338 * Map video memory in user space. We don't use the generic fb_mmap method mainly
 339 * to allow the use of the TLB streaming flag (CCA=6)
 340 */
 341int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 342{
 343        struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 344
 345        pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 346
 347        return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys,
 348                        fbdev->fb_len);
 349}
 350
 351static const struct fb_ops au1100fb_ops =
 352{
 353        .owner                  = THIS_MODULE,
 354        .fb_setcolreg           = au1100fb_fb_setcolreg,
 355        .fb_blank               = au1100fb_fb_blank,
 356        .fb_pan_display         = au1100fb_fb_pan_display,
 357        .fb_fillrect            = cfb_fillrect,
 358        .fb_copyarea            = cfb_copyarea,
 359        .fb_imageblit           = cfb_imageblit,
 360        .fb_mmap                = au1100fb_fb_mmap,
 361};
 362
 363
 364/*-------------------------------------------------------------------------*/
 365
 366static int au1100fb_setup(struct au1100fb_device *fbdev)
 367{
 368        char *this_opt, *options;
 369        int num_panels = ARRAY_SIZE(known_lcd_panels);
 370
 371        if (num_panels <= 0) {
 372                print_err("No LCD panels supported by driver!");
 373                return -ENODEV;
 374        }
 375
 376        if (fb_get_options(DRIVER_NAME, &options))
 377                return -ENODEV;
 378        if (!options)
 379                return -ENODEV;
 380
 381        while ((this_opt = strsep(&options, ",")) != NULL) {
 382                /* Panel option */
 383                if (!strncmp(this_opt, "panel:", 6)) {
 384                        int i;
 385                        this_opt += 6;
 386                        for (i = 0; i < num_panels; i++) {
 387                                if (!strncmp(this_opt, known_lcd_panels[i].name,
 388                                             strlen(this_opt))) {
 389                                        fbdev->panel = &known_lcd_panels[i];
 390                                        fbdev->panel_idx = i;
 391                                        break;
 392                                }
 393                        }
 394                        if (i >= num_panels) {
 395                                print_warn("Panel '%s' not supported!", this_opt);
 396                                return -ENODEV;
 397                        }
 398                }
 399                /* Unsupported option */
 400                else
 401                        print_warn("Unsupported option \"%s\"", this_opt);
 402        }
 403
 404        print_info("Panel=%s", fbdev->panel->name);
 405
 406        return 0;
 407}
 408
 409static int au1100fb_drv_probe(struct platform_device *dev)
 410{
 411        struct au1100fb_device *fbdev;
 412        struct resource *regs_res;
 413        struct clk *c;
 414
 415        /* Allocate new device private */
 416        fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
 417        if (!fbdev)
 418                return -ENOMEM;
 419
 420        if (au1100fb_setup(fbdev))
 421                goto failed;
 422
 423        platform_set_drvdata(dev, (void *)fbdev);
 424        fbdev->dev = &dev->dev;
 425
 426        /* Allocate region for our registers and map them */
 427        regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 428        if (!regs_res) {
 429                print_err("fail to retrieve registers resource");
 430                return -EFAULT;
 431        }
 432
 433        au1100fb_fix.mmio_start = regs_res->start;
 434        au1100fb_fix.mmio_len = resource_size(regs_res);
 435
 436        if (!devm_request_mem_region(&dev->dev,
 437                                     au1100fb_fix.mmio_start,
 438                                     au1100fb_fix.mmio_len,
 439                                     DRIVER_NAME)) {
 440                print_err("fail to lock memory region at 0x%08lx",
 441                                au1100fb_fix.mmio_start);
 442                return -EBUSY;
 443        }
 444
 445        fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 446
 447        print_dbg("Register memory map at %p", fbdev->regs);
 448        print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 449
 450        c = clk_get(NULL, "lcd_intclk");
 451        if (!IS_ERR(c)) {
 452                fbdev->lcdclk = c;
 453                clk_set_rate(c, 48000000);
 454                clk_prepare_enable(c);
 455        }
 456
 457        /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 458        fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 459                        (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 460
 461        fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
 462                                            PAGE_ALIGN(fbdev->fb_len),
 463                                            &fbdev->fb_phys, GFP_KERNEL);
 464        if (!fbdev->fb_mem) {
 465                print_err("fail to allocate framebuffer (size: %dK))",
 466                          fbdev->fb_len / 1024);
 467                return -ENOMEM;
 468        }
 469
 470        au1100fb_fix.smem_start = fbdev->fb_phys;
 471        au1100fb_fix.smem_len = fbdev->fb_len;
 472
 473        print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 474        print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 475
 476        /* load the panel info into the var struct */
 477        au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 478        au1100fb_var.xres = fbdev->panel->xres;
 479        au1100fb_var.xres_virtual = au1100fb_var.xres;
 480        au1100fb_var.yres = fbdev->panel->yres;
 481        au1100fb_var.yres_virtual = au1100fb_var.yres;
 482
 483        fbdev->info.screen_base = fbdev->fb_mem;
 484        fbdev->info.fbops = &au1100fb_ops;
 485        fbdev->info.fix = au1100fb_fix;
 486
 487        fbdev->info.pseudo_palette =
 488                devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL);
 489        if (!fbdev->info.pseudo_palette)
 490                return -ENOMEM;
 491
 492        if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 493                print_err("Fail to allocate colormap (%d entries)",
 494                           AU1100_LCD_NBR_PALETTE_ENTRIES);
 495                return -EFAULT;
 496        }
 497
 498        fbdev->info.var = au1100fb_var;
 499
 500        /* Set h/w registers */
 501        au1100fb_setmode(fbdev);
 502
 503        /* Register new framebuffer */
 504        if (register_framebuffer(&fbdev->info) < 0) {
 505                print_err("cannot register new framebuffer");
 506                goto failed;
 507        }
 508
 509        return 0;
 510
 511failed:
 512        if (fbdev->lcdclk) {
 513                clk_disable_unprepare(fbdev->lcdclk);
 514                clk_put(fbdev->lcdclk);
 515        }
 516        if (fbdev->info.cmap.len != 0) {
 517                fb_dealloc_cmap(&fbdev->info.cmap);
 518        }
 519
 520        return -ENODEV;
 521}
 522
 523int au1100fb_drv_remove(struct platform_device *dev)
 524{
 525        struct au1100fb_device *fbdev = NULL;
 526
 527        if (!dev)
 528                return -ENODEV;
 529
 530        fbdev = platform_get_drvdata(dev);
 531
 532#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 533        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 534#endif
 535        fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 536
 537        /* Clean up all probe data */
 538        unregister_framebuffer(&fbdev->info);
 539
 540        fb_dealloc_cmap(&fbdev->info.cmap);
 541
 542        if (fbdev->lcdclk) {
 543                clk_disable_unprepare(fbdev->lcdclk);
 544                clk_put(fbdev->lcdclk);
 545        }
 546
 547        return 0;
 548}
 549
 550#ifdef CONFIG_PM
 551static struct au1100fb_regs fbregs;
 552
 553int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 554{
 555        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 556
 557        if (!fbdev)
 558                return 0;
 559
 560        /* Blank the LCD */
 561        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 562
 563        if (fbdev->lcdclk)
 564                clk_disable(fbdev->lcdclk);
 565
 566        memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 567
 568        return 0;
 569}
 570
 571int au1100fb_drv_resume(struct platform_device *dev)
 572{
 573        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 574
 575        if (!fbdev)
 576                return 0;
 577
 578        memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 579
 580        if (fbdev->lcdclk)
 581                clk_enable(fbdev->lcdclk);
 582
 583        /* Unblank the LCD */
 584        au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 585
 586        return 0;
 587}
 588#else
 589#define au1100fb_drv_suspend NULL
 590#define au1100fb_drv_resume NULL
 591#endif
 592
 593static struct platform_driver au1100fb_driver = {
 594        .driver = {
 595                .name           = "au1100-lcd",
 596        },
 597        .probe          = au1100fb_drv_probe,
 598        .remove         = au1100fb_drv_remove,
 599        .suspend        = au1100fb_drv_suspend,
 600        .resume         = au1100fb_drv_resume,
 601};
 602module_platform_driver(au1100fb_driver);
 603
 604MODULE_DESCRIPTION(DRIVER_DESC);
 605MODULE_LICENSE("GPL");
 606