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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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
*/
#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.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 pwm_lookup nb0916_pwm_lookup[] = {
PWM_LOOKUP("PKUnity-v3-PWM", 0, "pwm-backlight", NULL, 70 * 1024,
PWM_POLARITY_NORMAL),
};
static struct platform_pwm_backlight_data nb0916_backlight_data = {
.max_brightness = 100,
.dft_brightness = 100,
};
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));
pwm_add_table(nb0916_pwm_lookup, ARRAY_SIZE(nb0916_pwm_lookup));
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);
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