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 
mddi_dummy_suspend(struct msm_panel_data * panel_data)30 static int mddi_dummy_suspend(struct msm_panel_data *panel_data)
31 {
32 	return 0;
33 }
34 
mddi_dummy_resume(struct msm_panel_data * panel_data)35 static int mddi_dummy_resume(struct msm_panel_data *panel_data)
36 {
37 	return 0;
38 }
39 
mddi_dummy_blank(struct msm_panel_data * panel_data)40 static int mddi_dummy_blank(struct msm_panel_data *panel_data)
41 {
42 	return 0;
43 }
44 
mddi_dummy_unblank(struct msm_panel_data * panel_data)45 static int mddi_dummy_unblank(struct msm_panel_data *panel_data)
46 {
47 	return 0;
48 }
49 
mddi_dummy_probe(struct platform_device * pdev)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 
mddi_dummy_remove(struct platform_device * pdev)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 
mddi_client_dummy_init(void)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 
99