Add linux-next specific files for 20110831
[linux-2.6/next.git] / arch / unicore32 / kernel / puv3-nb0916.c
blobe731c561ed4ec3b05132c27f28473b09bf42b926
1 /*
2 * linux/arch/unicore32/kernel/puv3-nb0916.c
4 * Code specific to PKUnity SoC and UniCore ISA
6 * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
7 * Copyright (C) 2001-2010 Guan Xuetao
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/init.h>
15 #include <linux/device.h>
16 #include <linux/sysdev.h>
17 #include <linux/platform_device.h>
18 #include <linux/mtd/physmap.h>
19 #include <linux/io.h>
20 #include <linux/reboot.h>
21 #include <linux/interrupt.h>
22 #include <linux/i2c.h>
23 #include <linux/pwm_backlight.h>
24 #include <linux/gpio.h>
25 #include <linux/gpio_keys.h>
26 #include <linux/input.h>
28 #include <mach/hardware.h>
30 static struct physmap_flash_data physmap_flash_data = {
31 .width = 1,
34 static struct resource physmap_flash_resource = {
35 .start = 0xFFF80000,
36 .end = 0xFFFFFFFF,
37 .flags = IORESOURCE_MEM,
40 static struct resource puv3_i2c_resources[] = {
41 [0] = {
42 .start = io_v2p(PKUNITY_I2C_BASE),
43 .end = io_v2p(PKUNITY_I2C_BASE) + 0xff,
44 .flags = IORESOURCE_MEM,
46 [1] = {
47 .start = IRQ_I2C,
48 .end = IRQ_I2C,
49 .flags = IORESOURCE_IRQ,
53 static struct platform_pwm_backlight_data nb0916_backlight_data = {
54 .pwm_id = 0,
55 .max_brightness = 100,
56 .dft_brightness = 100,
57 .pwm_period_ns = 70 * 1024,
60 static struct gpio_keys_button nb0916_gpio_keys[] = {
62 .type = EV_KEY,
63 .code = KEY_POWER,
64 .gpio = GPI_SOFF_REQ,
65 .desc = "Power Button",
66 .wakeup = 1,
67 .active_low = 1,
70 .type = EV_KEY,
71 .code = BTN_TOUCH,
72 .gpio = GPI_BTN_TOUCH,
73 .desc = "Touchpad Button",
74 .wakeup = 1,
75 .active_low = 1,
79 static struct gpio_keys_platform_data nb0916_gpio_button_data = {
80 .buttons = nb0916_gpio_keys,
81 .nbuttons = ARRAY_SIZE(nb0916_gpio_keys),
84 static irqreturn_t nb0916_lcdcaseoff_handler(int irq, void *dev_id)
86 if (gpio_get_value(GPI_LCD_CASE_OFF))
87 gpio_set_value(GPO_LCD_EN, 1);
88 else
89 gpio_set_value(GPO_LCD_EN, 0);
91 return IRQ_HANDLED;
94 static irqreturn_t nb0916_overheat_handler(int irq, void *dev_id)
96 machine_halt();
97 /* SYSTEM HALT, NO RETURN */
98 return IRQ_HANDLED;
101 static struct i2c_board_info __initdata puv3_i2c_devices[] = {
102 { I2C_BOARD_INFO("lm75", I2C_TAR_THERMAL), },
103 { I2C_BOARD_INFO("bq27200", I2C_TAR_PWIC), },
104 { I2C_BOARD_INFO("24c02", I2C_TAR_EEPROM), },
107 int __init mach_nb0916_init(void)
109 i2c_register_board_info(0, puv3_i2c_devices,
110 ARRAY_SIZE(puv3_i2c_devices));
112 platform_device_register_simple("PKUnity-v3-I2C", -1,
113 puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources));
115 platform_device_register_data(&platform_bus, "pwm-backlight", -1,
116 &nb0916_backlight_data, sizeof(nb0916_backlight_data));
118 platform_device_register_data(&platform_bus, "gpio-keys", -1,
119 &nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data));
121 platform_device_register_resndata(&platform_bus, "physmap-flash", -1,
122 &physmap_flash_resource, 1,
123 &physmap_flash_data, sizeof(physmap_flash_data));
125 if (request_irq(gpio_to_irq(GPI_LCD_CASE_OFF),
126 &nb0916_lcdcaseoff_handler,
127 IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
128 "NB0916 lcd case off", NULL) < 0) {
130 printk(KERN_DEBUG "LCD-Case-OFF IRQ %d not available\n",
131 gpio_to_irq(GPI_LCD_CASE_OFF));
134 if (request_irq(gpio_to_irq(GPI_OTP_INT), &nb0916_overheat_handler,
135 IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
136 "NB0916 overheating protection", NULL) < 0) {
138 printk(KERN_DEBUG "Overheating Protection IRQ %d not available\n",
139 gpio_to_irq(GPI_OTP_INT));
142 return 0;
145 subsys_initcall_sync(mach_nb0916_init);