arch/arm/mach-omap1/fb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * File: arch/arm/plat-omap/fb.c
   4  *
   5  * Framebuffer device registration for TI OMAP platforms
   6  *
   7  * Copyright (C) 2006 Nokia Corporation
   8  * Author: Imre Deak <imre.deak@nokia.com>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mm.h>
  14 #include <linux/init.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/memblock.h>
  17 #include <linux/io.h>
  18 #include <linux/omapfb.h>
  19 #include <linux/dma-mapping.h>
  20
  21 #include <asm/mach/map.h>
  22
  23 #if IS_ENABLED(CONFIG_FB_OMAP)
  24
  25 static bool omapfb_lcd_configured;
  26 static struct omapfb_platform_data omapfb_config;
  27
  28 static u64 omap_fb_dma_mask = ~(u32)0;
  29
  30 static struct platform_device omap_fb_device = {
  31         .name           = "omapfb",
  32         .id             = -1,
  33         .dev = {
  34                 .dma_mask               = &omap_fb_dma_mask,
  35                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  36                 .platform_data          = &omapfb_config,
  37         },
  38         .num_resources = 0,
  39 };
  40
  41 void __init omapfb_set_lcd_config(const struct omap_lcd_config *config)
  42 {
  43         omapfb_config.lcd = *config;
  44         omapfb_lcd_configured = true;
  45 }
  46
  47 static int __init omap_init_fb(void)
  48 {
  49         /*
  50          * If the board file has not set the lcd config with
  51          * omapfb_set_lcd_config(), don't bother registering the omapfb device
  52          */
  53         if (!omapfb_lcd_configured)
  54                 return 0;
  55
  56         return platform_device_register(&omap_fb_device);
  57 }
  58
  59 arch_initcall(omap_init_fb);
  60
  61 #else
  62
  63 void __init omapfb_set_lcd_config(const struct omap_lcd_config *config)
  64 {
  65 }
  66
  67 #endif