diff options
Diffstat (limited to 'arch/unicore32/kernel/puv3-nb0916.c')
-rw-r--r-- | arch/unicore32/kernel/puv3-nb0916.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/unicore32/kernel/puv3-nb0916.c b/arch/unicore32/kernel/puv3-nb0916.c new file mode 100644 index 00000000000..a78e6042065 --- /dev/null +++ b/arch/unicore32/kernel/puv3-nb0916.c @@ -0,0 +1,145 @@ +/* + * 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/sysdev.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 = PKUNITY_I2C_BASE, + .end = 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, +}; + +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(&platform_bus, "pwm-backlight", -1, + &nb0916_backlight_data, sizeof(nb0916_backlight_data)); + + platform_device_register_data(&platform_bus, "gpio-keys", -1, + &nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data)); + + platform_device_register_resndata(&platform_bus, "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_DISABLED | 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_DISABLED | 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); |