drivers/video/msm/mddi_client_dummy.c

   1 /* drivers/video/msm_fb/mddi_client_dummy.c
   2  *
   3  * Support for "dummy" mddi client devices which require no
   4  * special initialization code.
   5  *
   6  * Copyright (C) 2007 Google Incorporated
   7  *
   8  * This software is licensed under the terms of the GNU General Public
   9  * License version 2, as published by the Free Software Foundation, and
  10  * may be copied, distributed, and modified under those terms.
  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
  18 #include <linux/slab.h>
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <mach/msm_fb.h>
  24
  25 struct panel_info {
  26         struct platform_device pdev;
  27         struct msm_panel_data panel_data;
  28 };
  29
  30 static int mddi_dummy_suspend(struct msm_panel_data *panel_data)
  31 {
  32         return 0;
  33 }
  34
  35 static int mddi_dummy_resume(struct msm_panel_data *panel_data)
  36 {
  37         return 0;
  38 }
  39
  40 static int mddi_dummy_blank(struct msm_panel_data *panel_data)
  41 {
  42         return 0;
  43 }
  44
  45 static int mddi_dummy_unblank(struct msm_panel_data *panel_data)
  46 {
  47         return 0;
  48 }
  49
  50 static int mddi_dummy_probe(struct platform_device *pdev)
  51 {
  52         struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
  53         struct panel_info *panel =
  54                 kzalloc(sizeof(struct panel_info), GFP_KERNEL);
  55         int ret;
  56         if (!panel)
  57                 return -ENOMEM;
  58         platform_set_drvdata(pdev, panel);
  59         panel->panel_data.suspend = mddi_dummy_suspend;
  60         panel->panel_data.resume = mddi_dummy_resume;
  61         panel->panel_data.blank = mddi_dummy_blank;
  62         panel->panel_data.unblank = mddi_dummy_unblank;
  63         panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES;
  64         panel->pdev.name = "msm_panel";
  65         panel->pdev.id = pdev->id;
  66         platform_device_add_resources(&panel->pdev,
  67                                       client_data->fb_resource, 1);
  68         panel->panel_data.fb_data = client_data->private_client_data;
  69         panel->pdev.dev.platform_data = &panel->panel_data;
  70         ret = platform_device_register(&panel->pdev);
  71         if (ret) {
  72                 kfree(panel);
  73                 return ret;
  74         }
  75         return 0;
  76 }
  77
  78 static int mddi_dummy_remove(struct platform_device *pdev)
  79 {
  80         struct panel_info *panel = platform_get_drvdata(pdev);
  81         kfree(panel);
  82         return 0;
  83 }
  84
  85 static struct platform_driver mddi_client_dummy = {
  86         .probe = mddi_dummy_probe,
  87         .remove = mddi_dummy_remove,
  88         .driver = { .name = "mddi_c_dummy" },
  89 };
  90
  91 static int __init mddi_client_dummy_init(void)
  92 {
  93         platform_driver_register(&mddi_client_dummy);
  94         return 0;
  95 }
  96
  97 module_init(mddi_client_dummy_init);
  98