152 lines
3.7 KiB
C
152 lines
3.7 KiB
C
/*
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* linux/arch/unicore32/kernel/puv3-nb0916.c
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
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* Copyright (C) 2001-2010 Guan Xuetao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/physmap.h>
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#include <linux/io.h>
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#include <linux/reboot.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/pwm.h>
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#include <linux/pwm_backlight.h>
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#include <linux/gpio.h>
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#include <linux/gpio_keys.h>
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#include <linux/input.h>
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#include <mach/hardware.h>
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static struct physmap_flash_data physmap_flash_data = {
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.width = 1,
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};
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static struct resource physmap_flash_resource = {
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.start = 0xFFF80000,
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.end = 0xFFFFFFFF,
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.flags = IORESOURCE_MEM,
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};
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static struct resource puv3_i2c_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_I2C_BASE),
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.end = io_v2p(PKUNITY_I2C_BASE) + 0xff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_I2C,
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.end = IRQ_I2C,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct pwm_lookup nb0916_pwm_lookup[] = {
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PWM_LOOKUP("PKUnity-v3-PWM", 0, "pwm-backlight", NULL, 70 * 1024,
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PWM_POLARITY_NORMAL),
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};
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static struct platform_pwm_backlight_data nb0916_backlight_data = {
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.max_brightness = 100,
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.dft_brightness = 100,
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.enable_gpio = -1,
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};
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static struct gpio_keys_button nb0916_gpio_keys[] = {
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{
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.type = EV_KEY,
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.code = KEY_POWER,
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.gpio = GPI_SOFF_REQ,
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.desc = "Power Button",
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.wakeup = 1,
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.active_low = 1,
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},
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{
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.type = EV_KEY,
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.code = BTN_TOUCH,
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.gpio = GPI_BTN_TOUCH,
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.desc = "Touchpad Button",
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.wakeup = 1,
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.active_low = 1,
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},
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};
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static struct gpio_keys_platform_data nb0916_gpio_button_data = {
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.buttons = nb0916_gpio_keys,
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.nbuttons = ARRAY_SIZE(nb0916_gpio_keys),
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};
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static irqreturn_t nb0916_lcdcaseoff_handler(int irq, void *dev_id)
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{
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if (gpio_get_value(GPI_LCD_CASE_OFF))
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gpio_set_value(GPO_LCD_EN, 1);
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else
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gpio_set_value(GPO_LCD_EN, 0);
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return IRQ_HANDLED;
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}
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static irqreturn_t nb0916_overheat_handler(int irq, void *dev_id)
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{
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machine_halt();
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/* SYSTEM HALT, NO RETURN */
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return IRQ_HANDLED;
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}
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static struct i2c_board_info __initdata puv3_i2c_devices[] = {
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{ I2C_BOARD_INFO("lm75", I2C_TAR_THERMAL), },
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{ I2C_BOARD_INFO("bq27200", I2C_TAR_PWIC), },
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{ I2C_BOARD_INFO("24c02", I2C_TAR_EEPROM), },
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};
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int __init mach_nb0916_init(void)
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{
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i2c_register_board_info(0, puv3_i2c_devices,
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ARRAY_SIZE(puv3_i2c_devices));
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platform_device_register_simple("PKUnity-v3-I2C", -1,
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puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources));
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pwm_add_table(nb0916_pwm_lookup, ARRAY_SIZE(nb0916_pwm_lookup));
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platform_device_register_data(NULL, "pwm-backlight", -1,
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&nb0916_backlight_data, sizeof(nb0916_backlight_data));
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platform_device_register_data(NULL, "gpio-keys", -1,
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&nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data));
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platform_device_register_resndata(NULL, "physmap-flash", -1,
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&physmap_flash_resource, 1,
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&physmap_flash_data, sizeof(physmap_flash_data));
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if (request_irq(gpio_to_irq(GPI_LCD_CASE_OFF),
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&nb0916_lcdcaseoff_handler,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
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"NB0916 lcd case off", NULL) < 0) {
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printk(KERN_DEBUG "LCD-Case-OFF IRQ %d not available\n",
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gpio_to_irq(GPI_LCD_CASE_OFF));
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}
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if (request_irq(gpio_to_irq(GPI_OTP_INT), &nb0916_overheat_handler,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
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"NB0916 overheating protection", NULL) < 0) {
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printk(KERN_DEBUG "Overheating Protection IRQ %d not available\n",
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gpio_to_irq(GPI_OTP_INT));
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}
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return 0;
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}
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subsys_initcall_sync(mach_nb0916_init);
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