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linux_dsm_epyc7002/arch/arm/mach-s5pc100/mach-smdkc100.c
Banajit Goswami baa0c06093 ARM: SAMSUNG: Add PWM backlight support on Samsung S5PC100 
This patch adds support for LCD backlight using PWM timer for
Samsung SMDKC100 board.

Signed-off-by: Banajit Goswami <banajit.g@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-03 10:10:09 +09:00

290 lines
7.0 KiB
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/* linux/arch/arm/mach-s5pc100/mach-smdkc100.c
*
* Copyright 2009 Samsung Electronics Co.
* Author: Byungho Min <bhmin@samsung.com>
*
* 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/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/pwm_backlight.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/map.h>
#include <mach/regs-fb.h>
#include <mach/regs-gpio.h>
#include <video/platform_lcd.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <plat/regs-serial.h>
#include <plat/gpio-cfg.h>
#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/cpu.h>
#include <plat/s5pc100.h>
#include <plat/fb.h>
#include <plat/iic.h>
#include <plat/ata.h>
#include <plat/adc.h>
#include <plat/keypad.h>
#include <plat/ts.h>
#include <plat/audio.h>
/* Following are default values for UCON, ULCON and UFCON UART registers */
#define SMDKC100_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
S3C2410_UCON_RXILEVEL | \
S3C2410_UCON_TXIRQMODE | \
S3C2410_UCON_RXIRQMODE | \
S3C2410_UCON_RXFIFO_TOI | \
S3C2443_UCON_RXERR_IRQEN)
#define SMDKC100_ULCON_DEFAULT S3C2410_LCON_CS8
#define SMDKC100_UFCON_DEFAULT (S3C2410_UFCON_FIFOMODE | \
S3C2440_UFCON_RXTRIG8 | \
S3C2440_UFCON_TXTRIG16)
static struct s3c2410_uartcfg smdkc100_uartcfgs[] __initdata = {
[0] = {
.hwport = 0,
.flags = 0,
.ucon = SMDKC100_UCON_DEFAULT,
.ulcon = SMDKC100_ULCON_DEFAULT,
.ufcon = SMDKC100_UFCON_DEFAULT,
},
[1] = {
.hwport = 1,
.flags = 0,
.ucon = SMDKC100_UCON_DEFAULT,
.ulcon = SMDKC100_ULCON_DEFAULT,
.ufcon = SMDKC100_UFCON_DEFAULT,
},
[2] = {
.hwport = 2,
.flags = 0,
.ucon = SMDKC100_UCON_DEFAULT,
.ulcon = SMDKC100_ULCON_DEFAULT,
.ufcon = SMDKC100_UFCON_DEFAULT,
},
[3] = {
.hwport = 3,
.flags = 0,
.ucon = SMDKC100_UCON_DEFAULT,
.ulcon = SMDKC100_ULCON_DEFAULT,
.ufcon = SMDKC100_UFCON_DEFAULT,
},
};
/* I2C0 */
static struct i2c_board_info i2c_devs0[] __initdata = {
{I2C_BOARD_INFO("wm8580", 0x1b),},
};
/* I2C1 */
static struct i2c_board_info i2c_devs1[] __initdata = {
};
/* LCD power controller */
static void smdkc100_lcd_power_set(struct plat_lcd_data *pd,
unsigned int power)
{
if (power) {
/* module reset */
gpio_direction_output(S5PC100_GPH0(6), 1);
mdelay(100);
gpio_direction_output(S5PC100_GPH0(6), 0);
mdelay(10);
gpio_direction_output(S5PC100_GPH0(6), 1);
mdelay(10);
}
}
static struct plat_lcd_data smdkc100_lcd_power_data = {
.set_power = smdkc100_lcd_power_set,
};
static struct platform_device smdkc100_lcd_powerdev = {
.name = "platform-lcd",
.dev.parent = &s3c_device_fb.dev,
.dev.platform_data = &smdkc100_lcd_power_data,
};
/* Frame Buffer */
static struct s3c_fb_pd_win smdkc100_fb_win0 = {
/* this is to ensure we use win0 */
.win_mode = {
.left_margin = 8,
.right_margin = 13,
.upper_margin = 7,
.lower_margin = 5,
.hsync_len = 3,
.vsync_len = 1,
.xres = 800,
.yres = 480,
.refresh = 80,
},
.max_bpp = 32,
.default_bpp = 16,
};
static struct s3c_fb_platdata smdkc100_lcd_pdata __initdata = {
.win[0] = &smdkc100_fb_win0,
.vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
.vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
.setup_gpio = s5pc100_fb_gpio_setup_24bpp,
};
static struct s3c_ide_platdata smdkc100_ide_pdata __initdata = {
.setup_gpio = s5pc100_ide_setup_gpio,
};
static uint32_t smdkc100_keymap[] __initdata = {
/* KEY(row, col, keycode) */
KEY(0, 3, KEY_1), KEY(0, 4, KEY_2), KEY(0, 5, KEY_3),
KEY(0, 6, KEY_4), KEY(0, 7, KEY_5),
KEY(1, 3, KEY_A), KEY(1, 4, KEY_B), KEY(1, 5, KEY_C),
KEY(1, 6, KEY_D), KEY(1, 7, KEY_E)
};
static struct matrix_keymap_data smdkc100_keymap_data __initdata = {
.keymap = smdkc100_keymap,
.keymap_size = ARRAY_SIZE(smdkc100_keymap),
};
static struct samsung_keypad_platdata smdkc100_keypad_data __initdata = {
.keymap_data = &smdkc100_keymap_data,
.rows = 2,
.cols = 8,
};
static int smdkc100_backlight_init(struct device *dev)
{
int ret;
ret = gpio_request(S5PC100_GPD(0), "Backlight");
if (ret) {
printk(KERN_ERR "failed to request GPF for PWM-OUT0\n");
return ret;
}
/* Configure GPIO pin with S5PC100_GPD_TOUT_0 */
s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_SFN(2));
return 0;
}
static void smdkc100_backlight_exit(struct device *dev)
{
s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_OUTPUT);
gpio_free(S5PC100_GPD(0));
}
static struct platform_pwm_backlight_data smdkc100_backlight_data = {
.pwm_id = 0,
.max_brightness = 255,
.dft_brightness = 255,
.pwm_period_ns = 78770,
.init = smdkc100_backlight_init,
.exit = smdkc100_backlight_exit,
};
static struct platform_device smdkc100_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &s3c_device_timer[0].dev,
.platform_data = &smdkc100_backlight_data,
},
};
static struct platform_device *smdkc100_devices[] __initdata = {
&s3c_device_adc,
&s3c_device_cfcon,
&s3c_device_i2c0,
&s3c_device_i2c1,
&s3c_device_fb,
&s3c_device_hsmmc0,
&s3c_device_hsmmc1,
&s3c_device_hsmmc2,
&s3c_device_ts,
&s3c_device_wdt,
&smdkc100_lcd_powerdev,
&samsung_asoc_dma,
&s5pc100_device_iis0,
&samsung_device_keypad,
&s5pc100_device_ac97,
&s3c_device_rtc,
&s5p_device_fimc0,
&s5p_device_fimc1,
&s5p_device_fimc2,
&s5pc100_device_spdif,
&s3c_device_timer[0],
&smdkc100_backlight_device,
};
static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
.delay = 10000,
.presc = 49,
.oversampling_shift = 2,
};
static void __init smdkc100_map_io(void)
{
s5p_init_io(NULL, 0, S5P_VA_CHIPID);
s3c24xx_init_clocks(12000000);
s3c24xx_init_uarts(smdkc100_uartcfgs, ARRAY_SIZE(smdkc100_uartcfgs));
}
static void __init smdkc100_machine_init(void)
{
s3c24xx_ts_set_platdata(&s3c_ts_platform);
/* I2C */
s3c_i2c0_set_platdata(NULL);
s3c_i2c1_set_platdata(NULL);
i2c_register_board_info(0, i2c_devs0, ARRAY_SIZE(i2c_devs0));
i2c_register_board_info(1, i2c_devs1, ARRAY_SIZE(i2c_devs1));
s3c_fb_set_platdata(&smdkc100_lcd_pdata);
s3c_ide_set_platdata(&smdkc100_ide_pdata);
samsung_keypad_set_platdata(&smdkc100_keypad_data);
s5pc100_spdif_setup_gpio(S5PC100_SPDIF_GPD);
/* LCD init */
gpio_request(S5PC100_GPH0(6), "GPH0");
smdkc100_lcd_power_set(&smdkc100_lcd_power_data, 0);
platform_add_devices(smdkc100_devices, ARRAY_SIZE(smdkc100_devices));
}
MACHINE_START(SMDKC100, "SMDKC100")
/* Maintainer: Byungho Min <bhmin@samsung.com> */
.boot_params = S5P_PA_SDRAM + 0x100,
.init_irq = s5pc100_init_irq,
.map_io = smdkc100_map_io,
.init_machine = smdkc100_machine_init,
.timer = &s3c24xx_timer,
MACHINE_END
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