b68edac921
Use a PWM lookup table to provide the PWM to the pwm-backlight device. The driver has a legacy code path that is required only because boards still use the legacy method of requesting PWMs by global ID. Replacing these usages allows that legacy fallback to be removed. Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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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