arch/arm/mach-omap1/fb.c

   1 /*
   2  * File: arch/arm/plat-omap/fb.c
   3  *
   4  * Framebuffer device registration for TI OMAP platforms
   5  *
   6  * Copyright (C) 2006 Nokia Corporation
   7  * Author: Imre Deak <imre.deak@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/mm.h>
  27 #include <linux/init.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/memblock.h>
  30 #include <linux/io.h>
  31 #include <linux/omapfb.h>
  32 #include <linux/dma-mapping.h>
  33
  34 #include <asm/mach/map.h>
  35
  36 #if IS_ENABLED(CONFIG_FB_OMAP)
  37
  38 static bool omapfb_lcd_configured;
  39 static struct omapfb_platform_data omapfb_config;
  40
  41 static u64 omap_fb_dma_mask = ~(u32)0;
  42
  43 static struct platform_device omap_fb_device = {
  44         .name           = "omapfb",
  45         .id             = -1,
  46         .dev = {
  47                 .dma_mask               = &omap_fb_dma_mask,
  48                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  49                 .platform_data          = &omapfb_config,
  50         },
  51         .num_resources = 0,
  52 };
  53
  54 void __init omapfb_set_lcd_config(const struct omap_lcd_config *config)
  55 {
  56         omapfb_config.lcd = *config;
  57         omapfb_lcd_configured = true;
  58 }
  59
  60 static int __init omap_init_fb(void)
  61 {
  62         /*
  63          * If the board file has not set the lcd config with
  64          * omapfb_set_lcd_config(), don't bother registering the omapfb device
  65          */
  66         if (!omapfb_lcd_configured)
  67                 return 0;
  68
  69         return platform_device_register(&omap_fb_device);
  70 }
  71
  72 arch_initcall(omap_init_fb);
  73
  74 #else
  75
  76 void __init omapfb_set_lcd_config(const struct omap_lcd_config *config)
  77 {
  78 }
  79
  80 #endif