![Linus Torvalds](/assets/img/avatar_default.png)
Mostly bug fixes and clean up. There is a new driver, which is actually moving a custom PWM driver from drivers/misc. The majority of the patches are enhancements to the device tree support in the pwm-backlight driver. Backlights can now additionally be powered using a regulator and enabled using a GPIO in addition to just the PWM input. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAABAgAGBQJSh1s7AAoJEN0jrNd/PrOhdS4P/1A/Tx05pP0ACsizhkB4Ro02 XgjIusWw/jp+3LWXrlaReVNb5H6GlahDT5+2/ApAw06o7INGvpSzyI1fuFQ2DU6K L7MgWDSifeL7jiwfUq5f3Qv4Vccjgii0z4BBQI5ZpPluIzKpo2uhz7gIjBR3wPu9 i34bc902SL/DrlvbMUsRHlYT9Ok3TpsPynk0pmw8xrUZDqRAX7DZH0EmvMkVsDo2 T1vt9gQVTFVgIwlRUBcbrjbu1GnYaV20s+piQhYm1RMSUqY+ArldWKzEzlN3tLYc XdnkaLikdHDRBA4DeNPJGbPU8LQax8wCTaZa1PgT0PqjNX/dCkg3hsc1Em0dH9Zh PKvyX8R6iPdOcakkRm4qdVIacblqE1HYM7T+lyVhu6XP7MWkUmNr05HQBFjhOMcm whv1gS/EeB4y/FcSzn7S23UAmOvxiWfGnOMlnazrOgS00FrbC4accgSB/iXi2lDC szO9MHwfbwDTp8WBLEw8iTPODpq7pnFcBCw80pzblMFqC8v1MAFyriwT7BUmKcR/ h/V75Q95VPAKq+uKsfb5Ruwa9CGKs8ACagLR0BuErT/J83Q7Q4Ezf56FUCvrGDtz 5AWpGUakotwHtJPx6TAOgI+237MFh/GpIOrlEtz+2b5SP6ftHxr8rj+wg1sxmI2y JohOUIFjHtcA4UifhlTU =CB+z -----END PGP SIGNATURE----- Merge tag 'pwm/for-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm changes from Thierry Reding: "Mostly bug fixes and clean up. There is a new driver, which is actually moving a custom PWM driver from drivers/misc. The majority of the patches are enhancements to the device tree support in the pwm-backlight driver. Backlights can now additionally be powered using a regulator and enabled using a GPIO in addition to just the PWM input" * tag 'pwm/for-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (30 commits) Documentation/pwm: Update supported SoC name for pwm-samsung pwm: samsung: Fix kernel warning while unexporting a channel MAINTAINERS: Move PWM subsystem tree to kernel.org Documentation/pwm: Fix trivial typos pwm-backlight: Remove unused variable pwm_backlight: avoid short blank screen while doing hibernation pwm-backlight: Fix brightness adjustment pwm: add ep93xx PWM support pwm-backlight: Allow for non-increasing brightness levels pwm-backlight: Add power supply support pwm-backlight: Use new enable_gpio field unicore32: Initialize PWM backlight enable_gpio field ARM: shmobile: Initialize PWM backlight enable_gpio field ARM: SAMSUNG: Initialize PWM backlight enable_gpio field ARM: pxa: Initialize PWM backlight enable_gpio field ARM: OMAP: Initialize PWM backlight enable_gpio field pwm-backlight: Add optional enable GPIO pwm-backlight: Track enable state pwm-backlight: Refactor backlight power on/off pwm-backlight: Improve readability ...
284 lines
6.3 KiB
C
284 lines
6.3 KiB
C
/* mach-hmt.c - Platform code for Airgoo HMT
|
|
*
|
|
* Copyright 2009 Peter Korsgaard <jacmet@sunsite.dk>
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/pwm_backlight.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <video/samsung_fimd.h>
|
|
#include <mach/hardware.h>
|
|
#include <mach/map.h>
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
#include <plat/regs-serial.h>
|
|
#include <linux/platform_data/i2c-s3c2410.h>
|
|
#include <plat/fb.h>
|
|
#include <linux/platform_data/mtd-nand-s3c2410.h>
|
|
|
|
#include <plat/clock.h>
|
|
#include <plat/devs.h>
|
|
#include <plat/cpu.h>
|
|
#include <plat/samsung-time.h>
|
|
|
|
#include "common.h"
|
|
|
|
#define UCON S3C2410_UCON_DEFAULT
|
|
#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
|
|
#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
|
|
|
|
static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
|
|
[0] = {
|
|
.hwport = 0,
|
|
.flags = 0,
|
|
.ucon = UCON,
|
|
.ulcon = ULCON,
|
|
.ufcon = UFCON,
|
|
},
|
|
[1] = {
|
|
.hwport = 1,
|
|
.flags = 0,
|
|
.ucon = UCON,
|
|
.ulcon = ULCON,
|
|
.ufcon = UFCON,
|
|
},
|
|
[2] = {
|
|
.hwport = 2,
|
|
.flags = 0,
|
|
.ucon = UCON,
|
|
.ulcon = ULCON,
|
|
.ufcon = UFCON,
|
|
},
|
|
};
|
|
|
|
static int hmt_bl_init(struct device *dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
|
|
if (!ret)
|
|
ret = gpio_direction_output(S3C64XX_GPB(4), 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int hmt_bl_notify(struct device *dev, int brightness)
|
|
{
|
|
/*
|
|
* translate from CIELUV/CIELAB L*->brightness, E.G. from
|
|
* perceived luminance to light output. Assumes range 0..25600
|
|
*/
|
|
if (brightness < 0x800) {
|
|
/* Y = Yn * L / 903.3 */
|
|
brightness = (100*256 * brightness + 231245/2) / 231245;
|
|
} else {
|
|
/* Y = Yn * ((L + 16) / 116 )^3 */
|
|
int t = (brightness*4 + 16*1024 + 58)/116;
|
|
brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
|
|
}
|
|
|
|
gpio_set_value(S3C64XX_GPB(4), brightness);
|
|
|
|
return brightness;
|
|
}
|
|
|
|
static void hmt_bl_exit(struct device *dev)
|
|
{
|
|
gpio_free(S3C64XX_GPB(4));
|
|
}
|
|
|
|
static struct platform_pwm_backlight_data hmt_backlight_data = {
|
|
.pwm_id = 1,
|
|
.max_brightness = 100 * 256,
|
|
.dft_brightness = 40 * 256,
|
|
.pwm_period_ns = 1000000000 / (100 * 256 * 20),
|
|
.enable_gpio = -1,
|
|
.init = hmt_bl_init,
|
|
.notify = hmt_bl_notify,
|
|
.exit = hmt_bl_exit,
|
|
|
|
};
|
|
|
|
static struct platform_device hmt_backlight_device = {
|
|
.name = "pwm-backlight",
|
|
.dev = {
|
|
.parent = &samsung_device_pwm.dev,
|
|
.platform_data = &hmt_backlight_data,
|
|
},
|
|
};
|
|
|
|
static struct s3c_fb_pd_win hmt_fb_win0 = {
|
|
.max_bpp = 32,
|
|
.default_bpp = 16,
|
|
.xres = 800,
|
|
.yres = 480,
|
|
};
|
|
|
|
static struct fb_videomode hmt_lcd_timing = {
|
|
.left_margin = 8,
|
|
.right_margin = 13,
|
|
.upper_margin = 7,
|
|
.lower_margin = 5,
|
|
.hsync_len = 3,
|
|
.vsync_len = 1,
|
|
.xres = 800,
|
|
.yres = 480,
|
|
};
|
|
|
|
/* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
|
|
static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
|
|
.setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
|
|
.vtiming = &hmt_lcd_timing,
|
|
.win[0] = &hmt_fb_win0,
|
|
.vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
|
|
.vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
|
|
};
|
|
|
|
static struct mtd_partition hmt_nand_part[] = {
|
|
[0] = {
|
|
.name = "uboot",
|
|
.size = SZ_512K,
|
|
.offset = 0,
|
|
},
|
|
[1] = {
|
|
.name = "uboot-env1",
|
|
.size = SZ_256K,
|
|
.offset = SZ_512K,
|
|
},
|
|
[2] = {
|
|
.name = "uboot-env2",
|
|
.size = SZ_256K,
|
|
.offset = SZ_512K + SZ_256K,
|
|
},
|
|
[3] = {
|
|
.name = "kernel",
|
|
.size = SZ_2M,
|
|
.offset = SZ_1M,
|
|
},
|
|
[4] = {
|
|
.name = "rootfs",
|
|
.size = MTDPART_SIZ_FULL,
|
|
.offset = SZ_1M + SZ_2M,
|
|
},
|
|
};
|
|
|
|
static struct s3c2410_nand_set hmt_nand_sets[] = {
|
|
[0] = {
|
|
.name = "nand",
|
|
.nr_chips = 1,
|
|
.nr_partitions = ARRAY_SIZE(hmt_nand_part),
|
|
.partitions = hmt_nand_part,
|
|
},
|
|
};
|
|
|
|
static struct s3c2410_platform_nand hmt_nand_info = {
|
|
.tacls = 25,
|
|
.twrph0 = 55,
|
|
.twrph1 = 40,
|
|
.nr_sets = ARRAY_SIZE(hmt_nand_sets),
|
|
.sets = hmt_nand_sets,
|
|
};
|
|
|
|
static struct gpio_led hmt_leds[] = {
|
|
{ /* left function keys */
|
|
.name = "left:blue",
|
|
.gpio = S3C64XX_GPO(12),
|
|
.default_trigger = "default-on",
|
|
},
|
|
{ /* right function keys - red */
|
|
.name = "right:red",
|
|
.gpio = S3C64XX_GPO(13),
|
|
},
|
|
{ /* right function keys - green */
|
|
.name = "right:green",
|
|
.gpio = S3C64XX_GPO(14),
|
|
},
|
|
{ /* right function keys - blue */
|
|
.name = "right:blue",
|
|
.gpio = S3C64XX_GPO(15),
|
|
.default_trigger = "default-on",
|
|
},
|
|
};
|
|
|
|
static struct gpio_led_platform_data hmt_led_data = {
|
|
.num_leds = ARRAY_SIZE(hmt_leds),
|
|
.leds = hmt_leds,
|
|
};
|
|
|
|
static struct platform_device hmt_leds_device = {
|
|
.name = "leds-gpio",
|
|
.id = -1,
|
|
.dev.platform_data = &hmt_led_data,
|
|
};
|
|
|
|
static struct map_desc hmt_iodesc[] = {};
|
|
|
|
static struct platform_device *hmt_devices[] __initdata = {
|
|
&s3c_device_i2c0,
|
|
&s3c_device_nand,
|
|
&s3c_device_fb,
|
|
&s3c_device_ohci,
|
|
&samsung_device_pwm,
|
|
&hmt_backlight_device,
|
|
&hmt_leds_device,
|
|
};
|
|
|
|
static void __init hmt_map_io(void)
|
|
{
|
|
s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
|
|
s3c64xx_set_xtal_freq(12000000);
|
|
s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
|
|
samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
|
|
}
|
|
|
|
static void __init hmt_machine_init(void)
|
|
{
|
|
s3c_i2c0_set_platdata(NULL);
|
|
s3c_fb_set_platdata(&hmt_lcd_pdata);
|
|
s3c_nand_set_platdata(&hmt_nand_info);
|
|
|
|
gpio_request(S3C64XX_GPC(7), "usb power");
|
|
gpio_direction_output(S3C64XX_GPC(7), 0);
|
|
gpio_request(S3C64XX_GPM(0), "usb power");
|
|
gpio_direction_output(S3C64XX_GPM(0), 1);
|
|
gpio_request(S3C64XX_GPK(7), "usb power");
|
|
gpio_direction_output(S3C64XX_GPK(7), 1);
|
|
gpio_request(S3C64XX_GPF(13), "usb power");
|
|
gpio_direction_output(S3C64XX_GPF(13), 1);
|
|
|
|
platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
|
|
}
|
|
|
|
MACHINE_START(HMT, "Airgoo-HMT")
|
|
/* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
|
|
.atag_offset = 0x100,
|
|
.init_irq = s3c6410_init_irq,
|
|
.map_io = hmt_map_io,
|
|
.init_machine = hmt_machine_init,
|
|
.init_late = s3c64xx_init_late,
|
|
.init_time = samsung_timer_init,
|
|
.restart = s3c64xx_restart,
|
|
MACHINE_END
|