1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * LCD driver for HP Jornada 700 series (710/720/728)
5 * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
8 #include <linux/device.h>
10 #include <linux/kernel.h>
11 #include <linux/lcd.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/delay.h>
16 #include <mach/jornada720.h>
17 #include <mach/hardware.h>
19 #include <video/s1d13xxxfb.h>
21 #define LCD_MAX_CONTRAST 0xff
22 #define LCD_DEF_CONTRAST 0x80
24 static int jornada_lcd_get_power(struct lcd_device *ld)
26 return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
29 static int jornada_lcd_get_contrast(struct lcd_device *ld)
33 if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
38 if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) {
39 ret = jornada_ssp_byte(TXDUMMY);
43 dev_err(&ld->dev, "failed to set contrast\n");
51 static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
57 /* start by sending our set contrast cmd to mcu */
58 if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) {
59 /* if successful push the new value */
60 if (jornada_ssp_byte(value) == TXDUMMY)
64 dev_err(&ld->dev, "failed to set contrast\n");
72 static int jornada_lcd_set_power(struct lcd_device *ld, int power)
74 if (power != FB_BLANK_UNBLANK) {
84 static struct lcd_ops jornada_lcd_props = {
85 .get_contrast = jornada_lcd_get_contrast,
86 .set_contrast = jornada_lcd_set_contrast,
87 .get_power = jornada_lcd_get_power,
88 .set_power = jornada_lcd_set_power,
91 static int jornada_lcd_probe(struct platform_device *pdev)
93 struct lcd_device *lcd_device;
96 lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME,
97 &pdev->dev, NULL, &jornada_lcd_props);
99 if (IS_ERR(lcd_device)) {
100 ret = PTR_ERR(lcd_device);
101 dev_err(&pdev->dev, "failed to register device\n");
105 platform_set_drvdata(pdev, lcd_device);
107 /* lets set our default values */
108 jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
109 jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
110 /* give it some time to startup */
116 static struct platform_driver jornada_lcd_driver = {
117 .probe = jornada_lcd_probe,
119 .name = "jornada_lcd",
123 module_platform_driver(jornada_lcd_driver);
125 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
126 MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
127 MODULE_LICENSE("GPL");