summaryrefslogtreecommitdiffstats
path: root/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
blob: bbe880bbe795b36729cf9c75bbf7676823834d4f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/*
 * LCD panel driver for Sharp LS037V7DW01
 *
 * Copyright (C) 2008 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>

#include <plat/display.h>

struct sharp_data {
	/* XXX This regulator should actually be in SDP board file, not here,
	 * as it doesn't actually power the LCD, but something else that
	 * affects the output to LCD (I think. Somebody clarify). It doesn't do
	 * harm here, as SDP is the only board using this currently */
	struct regulator *vdvi_reg;
};

static struct omap_video_timings sharp_ls_timings = {
	.x_res = 480,
	.y_res = 640,

	.pixel_clock	= 19200,

	.hsw		= 2,
	.hfp		= 1,
	.hbp		= 28,

	.vsw		= 1,
	.vfp		= 1,
	.vbp		= 1,
};

static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
{
	struct sharp_data *sd;

	dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
		OMAP_DSS_LCD_IHS;
	dssdev->panel.acb = 0x28;
	dssdev->panel.timings = sharp_ls_timings;

	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	if (!sd)
		return -ENOMEM;

	dev_set_drvdata(&dssdev->dev, sd);

	sd->vdvi_reg = regulator_get(&dssdev->dev, "vdvi");
	if (IS_ERR(sd->vdvi_reg)) {
		kfree(sd);
		pr_err("failed to get VDVI regulator\n");
		return PTR_ERR(sd->vdvi_reg);
	}

	return 0;
}

static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
{
	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);

	regulator_put(sd->vdvi_reg);

	kfree(sd);
}

static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
{
	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
	int r = 0;

	/* wait couple of vsyncs until enabling the LCD */
	msleep(50);

	regulator_enable(sd->vdvi_reg);

	if (dssdev->platform_enable)
		r = dssdev->platform_enable(dssdev);

	return r;
}

static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
{
	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);

	if (dssdev->platform_disable)
		dssdev->platform_disable(dssdev);

	regulator_disable(sd->vdvi_reg);

	/* wait at least 5 vsyncs after disabling the LCD */

	msleep(100);
}

static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev)
{
	sharp_ls_panel_disable(dssdev);
	return 0;
}

static int sharp_ls_panel_resume(struct omap_dss_device *dssdev)
{
	return sharp_ls_panel_enable(dssdev);
}

static struct omap_dss_driver sharp_ls_driver = {
	.probe		= sharp_ls_panel_probe,
	.remove		= sharp_ls_panel_remove,

	.enable		= sharp_ls_panel_enable,
	.disable	= sharp_ls_panel_disable,
	.suspend	= sharp_ls_panel_suspend,
	.resume		= sharp_ls_panel_resume,

	.driver         = {
		.name   = "sharp_ls_panel",
		.owner  = THIS_MODULE,
	},
};

static int __init sharp_ls_panel_drv_init(void)
{
	return omap_dss_register_driver(&sharp_ls_driver);
}

static void __exit sharp_ls_panel_drv_exit(void)
{
	omap_dss_unregister_driver(&sharp_ls_driver);
}

module_init(sharp_ls_panel_drv_init);
module_exit(sharp_ls_panel_drv_exit);
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud