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