This source file includes following definitions.
- micro_bl_update_status
- micro_backlight_probe
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8 #include <linux/backlight.h>
9 #include <linux/err.h>
10 #include <linux/fb.h>
11 #include <linux/init.h>
12 #include <linux/mfd/ipaq-micro.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15
16 static int micro_bl_update_status(struct backlight_device *bd)
17 {
18 struct ipaq_micro *micro = dev_get_drvdata(&bd->dev);
19 int intensity = bd->props.brightness;
20 struct ipaq_micro_msg msg = {
21 .id = MSG_BACKLIGHT,
22 .tx_len = 3,
23 };
24
25 if (bd->props.power != FB_BLANK_UNBLANK)
26 intensity = 0;
27 if (bd->props.state & (BL_CORE_FBBLANK | BL_CORE_SUSPENDED))
28 intensity = 0;
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36 msg.tx_data[0] = 0x01;
37 msg.tx_data[1] = intensity > 0 ? 1 : 0;
38 msg.tx_data[2] = intensity;
39 return ipaq_micro_tx_msg_sync(micro, &msg);
40 }
41
42 static const struct backlight_ops micro_bl_ops = {
43 .options = BL_CORE_SUSPENDRESUME,
44 .update_status = micro_bl_update_status,
45 };
46
47 static struct backlight_properties micro_bl_props = {
48 .type = BACKLIGHT_RAW,
49 .max_brightness = 255,
50 .power = FB_BLANK_UNBLANK,
51 .brightness = 64,
52 };
53
54 static int micro_backlight_probe(struct platform_device *pdev)
55 {
56 struct backlight_device *bd;
57 struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent);
58
59 bd = devm_backlight_device_register(&pdev->dev, "ipaq-micro-backlight",
60 &pdev->dev, micro, µ_bl_ops,
61 µ_bl_props);
62 if (IS_ERR(bd))
63 return PTR_ERR(bd);
64
65 platform_set_drvdata(pdev, bd);
66 backlight_update_status(bd);
67
68 return 0;
69 }
70
71 static struct platform_driver micro_backlight_device_driver = {
72 .driver = {
73 .name = "ipaq-micro-backlight",
74 },
75 .probe = micro_backlight_probe,
76 };
77 module_platform_driver(micro_backlight_device_driver);
78
79 MODULE_LICENSE("GPL v2");
80 MODULE_DESCRIPTION("driver for iPAQ Atmel micro backlight");
81 MODULE_ALIAS("platform:ipaq-micro-backlight");