2 * Copyright (C) 2010 Texas Instruments Inc.
4 * Modified from mach-omap2/board-zoom-peripherals.c
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/platform_device.h>
14 #include <linux/gpio.h>
15 #include <linux/i2c/twl.h>
16 #include <linux/spi/spi.h>
17 #include <linux/platform_data/spi-omap2-mcspi.h>
18 #include <video/omapdss.h>
19 #include "board-zoom.h"
24 #define LCD_PANEL_RESET_GPIO_PROD 96
25 #define LCD_PANEL_RESET_GPIO_PILOT 55
26 #define LCD_PANEL_QVGA_GPIO 56
28 static struct gpio zoom_lcd_gpios
[] __initdata
= {
29 { -EINVAL
, GPIOF_OUT_INIT_HIGH
, "lcd reset" },
30 { LCD_PANEL_QVGA_GPIO
, GPIOF_OUT_INIT_HIGH
, "lcd qvga" },
33 static void __init
zoom_lcd_panel_init(void)
35 zoom_lcd_gpios
[0].gpio
= (omap_rev() > OMAP3430_REV_ES3_0
) ?
36 LCD_PANEL_RESET_GPIO_PROD
:
37 LCD_PANEL_RESET_GPIO_PILOT
;
39 if (gpio_request_array(zoom_lcd_gpios
, ARRAY_SIZE(zoom_lcd_gpios
)))
40 pr_err("%s: Failed to get LCD GPIOs.\n", __func__
);
43 static int zoom_panel_enable_lcd(struct omap_dss_device
*dssdev
)
48 static void zoom_panel_disable_lcd(struct omap_dss_device
*dssdev
)
53 * PWMA/B register offsets (TWL4030_MODULE_PWMA)
55 #define TWL_INTBR_PMBR1 0xD
56 #define TWL_INTBR_GPBR1 0xC
57 #define TWL_LED_PWMON 0x0
58 #define TWL_LED_PWMOFF 0x1
60 static int zoom_set_bl_intensity(struct omap_dss_device
*dssdev
, int level
)
62 #ifdef CONFIG_TWL4030_CORE
69 twl_i2c_read_u8(TWL4030_MODULE_INTBR
, &mux_pwm
, TWL_INTBR_PMBR1
);
70 twl_i2c_read_u8(TWL4030_MODULE_INTBR
, &enb_pwm
, TWL_INTBR_GPBR1
);
73 /* disable pwm1 output and clock */
74 enb_pwm
= enb_pwm
& 0xF5;
75 /* change pwm1 pin to gpio pin */
76 mux_pwm
= mux_pwm
& 0xCF;
77 twl_i2c_write_u8(TWL4030_MODULE_INTBR
,
78 enb_pwm
, TWL_INTBR_GPBR1
);
79 twl_i2c_write_u8(TWL4030_MODULE_INTBR
,
80 mux_pwm
, TWL_INTBR_PMBR1
);
84 if (!((enb_pwm
& 0xA) && (mux_pwm
& 0x30))) {
85 /* change gpio pin to pwm1 pin */
86 mux_pwm
= mux_pwm
| 0x30;
87 /* enable pwm1 output and clock*/
88 enb_pwm
= enb_pwm
| 0x0A;
89 twl_i2c_write_u8(TWL4030_MODULE_INTBR
,
90 mux_pwm
, TWL_INTBR_PMBR1
);
91 twl_i2c_write_u8(TWL4030_MODULE_INTBR
,
92 enb_pwm
, TWL_INTBR_GPBR1
);
95 c
= ((50 * (100 - level
)) / 100) + 1;
96 twl_i2c_write_u8(TWL4030_MODULE_PWM1
, 0x7F, TWL_LED_PWMOFF
);
97 twl_i2c_write_u8(TWL4030_MODULE_PWM1
, c
, TWL_LED_PWMON
);
99 pr_warn("Backlight not enabled\n");
105 static struct omap_dss_device zoom_lcd_device
= {
107 .driver_name
= "NEC_8048_panel",
108 .type
= OMAP_DISPLAY_TYPE_DPI
,
109 .phy
.dpi
.data_lines
= 24,
110 .platform_enable
= zoom_panel_enable_lcd
,
111 .platform_disable
= zoom_panel_disable_lcd
,
112 .max_backlight_level
= 100,
113 .set_backlight
= zoom_set_bl_intensity
,
116 static struct omap_dss_device
*zoom_dss_devices
[] = {
120 static struct omap_dss_board_info zoom_dss_data
= {
121 .num_devices
= ARRAY_SIZE(zoom_dss_devices
),
122 .devices
= zoom_dss_devices
,
123 .default_device
= &zoom_lcd_device
,
126 static struct omap2_mcspi_device_config dss_lcd_mcspi_config
= {
130 static struct spi_board_info nec_8048_spi_board_info
[] __initdata
= {
132 .modalias
= "nec_8048_spi",
135 .max_speed_hz
= 375000,
136 .controller_data
= &dss_lcd_mcspi_config
,
140 void __init
zoom_display_init(void)
142 omap_display_init(&zoom_dss_data
);
143 spi_register_board_info(nec_8048_spi_board_info
,
144 ARRAY_SIZE(nec_8048_spi_board_info
));
145 zoom_lcd_panel_init();