diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.26/0013-gta01-backlight.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches-2.6.26/0013-gta01-backlight.patch.patch | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.26/0013-gta01-backlight.patch.patch b/target/linux/s3c24xx/patches-2.6.26/0013-gta01-backlight.patch.patch new file mode 100755 index 0000000..df13abd --- /dev/null +++ b/target/linux/s3c24xx/patches-2.6.26/0013-gta01-backlight.patch.patch @@ -0,0 +1,308 @@ +From deee418974cd5cc3b1aa9b1329d91b50f8bb7baf Mon Sep 17 00:00:00 2001 +From: mokopatches <mokopatches@openmoko.org> +Date: Wed, 16 Jul 2008 14:44:49 +0100 +Subject: [PATCH] gta01-backlight.patch + This is a backlight driver for the FIC/OpenMoko Neo1973 GTA01 GSM Phone + +Signed-off-by: Harald Welte <laforge@openmoko.org> +--- + drivers/video/backlight/Kconfig | 7 + + drivers/video/backlight/Makefile | 1 + + drivers/video/backlight/gta01_bl.c | 255 ++++++++++++++++++++++++++++++++++++ + 3 files changed, 263 insertions(+), 0 deletions(-) + create mode 100644 drivers/video/backlight/gta01_bl.c + +diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig +index dcd8073..475db76 100644 +--- a/drivers/video/backlight/Kconfig ++++ b/drivers/video/backlight/Kconfig +@@ -89,6 +89,13 @@ config BACKLIGHT_OMAP1 + the PWL module of OMAP1 processors. Say Y if your board + uses this hardware. + ++config BACKLIGHT_GTA01 ++ tristate "FIC Neo1973 GTA01 Backlight Driver" ++ depends on BACKLIGHT_CLASS_DEVICE && MACH_NEO1973_GTA01 ++ default y ++ help ++ If you have a FIC Neo1973 GTA01, say y to enable the backlight driver. ++ + config BACKLIGHT_HP680 + tristate "HP Jornada 680 Backlight Driver" + depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX +diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile +index 33f6c7c..aee9f46 100644 +--- a/drivers/video/backlight/Makefile ++++ b/drivers/video/backlight/Makefile +@@ -5,6 +5,7 @@ obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o + + obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o + obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o ++obj-$(CONFIG_BACKLIGHT_GTA01) += gta01_bl.o + obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o + obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o + obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o +diff --git a/drivers/video/backlight/gta01_bl.c b/drivers/video/backlight/gta01_bl.c +new file mode 100644 +index 0000000..c2bf0c9 +--- /dev/null ++++ b/drivers/video/backlight/gta01_bl.c +@@ -0,0 +1,255 @@ ++/* ++ * Backlight Driver for FIC GTA01 (Neo1973) GSM Phone ++ * ++ * Copyright (C) 2006-2007 by OpenMoko, Inc. ++ * Author: Harald Welte <laforge@openmoko.org> ++ * All rights reserved. ++ * ++ * based on corgi_cl.c, Copyright (c) 2004-2006 Richard Purdie ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License as ++ * published by the Free Software Foundation, version 2. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, ++ * MA 02111-1307 USA ++ * ++ * Javi Roman <javiroman@kernel-labs.org>: ++ * implement PWM, instead of simple on/off switching ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/platform_device.h> ++#include <linux/mutex.h> ++#include <linux/fb.h> ++#include <linux/backlight.h> ++#include <linux/clk.h> ++ ++#include <asm/arch/hardware.h> ++#include <asm/arch/gta01.h> ++#include <asm/arch/pwm.h> ++ ++#include <asm/plat-s3c/regs-timer.h> ++ ++static struct backlight_properties gta01bl_prop; ++static struct backlight_device *gta01_backlight_device; ++static struct gta01bl_machinfo *bl_machinfo; ++ ++static unsigned long gta01bl_flags; ++ ++struct gta01bl_data { ++ int intensity; ++ struct mutex mutex; ++ struct clk *clk; ++ struct s3c2410_pwm pwm; ++}; ++ ++static struct gta01bl_data gta01bl; ++ ++#define GTA01BL_SUSPENDED 0x01 ++#define GTA01BL_BATTLOW 0x02 ++ ++/* On the GTA01 / Neo1973, we use a 50 or 66MHz PCLK, which gives ++ * us a 6.25..8.25MHz DIV8 clock, which is further divided by a ++ * prescaler of 4, resulting in a 1.56..2.06MHz tick. This results in a ++ * minimum frequency of 24..31Hz. At 400Hz, we need to set the count ++ * to something like 3906..5156, providing us a way sufficient resolution ++ * for display brightness adjustment. */ ++#define GTA01BL_COUNTER 5156 ++ ++static int gta01bl_send_intensity(struct backlight_device *bd) ++{ ++ int intensity = bd->props.brightness; ++ ++ if (bd->props.power != FB_BLANK_UNBLANK) ++ intensity = 0; ++ if (bd->props.fb_blank != FB_BLANK_UNBLANK) ++ intensity = 0; ++ if (gta01bl_flags & GTA01BL_SUSPENDED) ++ intensity = 0; ++ if (gta01bl_flags & GTA01BL_BATTLOW) ++ intensity &= bl_machinfo->limit_mask; ++ ++ mutex_lock(>a01bl.mutex); ++#ifdef GTA01_BACKLIGHT_ONOFF_ONLY ++ if (intensity) ++ s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 1); ++ else ++ s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 0); ++#else ++ if (intensity == bd->props.max_brightness) { ++ s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 1); ++ s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT); ++ } else { ++ s3c2410_pwm_duty_cycle(intensity & 0xffff, >a01bl.pwm); ++ s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPB0_TOUT0); ++ } ++#endif ++ mutex_unlock(>a01bl.mutex); ++ ++ gta01bl.intensity = intensity; ++ return 0; ++} ++ ++static int gta01bl_init_hw(void) ++{ ++ int rc; ++ ++ rc = s3c2410_pwm_init(>a01bl.pwm); ++ if (rc) ++ return rc; ++ ++ gta01bl.pwm.timerid = PWM0; ++ gta01bl.pwm.prescaler = (4 - 1); ++ gta01bl.pwm.divider = S3C2410_TCFG1_MUX0_DIV8; ++ gta01bl.pwm.counter = GTA01BL_COUNTER; ++ gta01bl.pwm.comparer = gta01bl.pwm.counter; ++ ++ rc = s3c2410_pwm_enable(>a01bl.pwm); ++ if (rc) ++ return rc; ++ ++ s3c2410_pwm_start(>a01bl.pwm); ++ ++ gta01bl_prop.max_brightness = gta01bl.pwm.counter; ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++static int gta01bl_suspend(struct platform_device *dev, pm_message_t state) ++{ ++ gta01bl_flags |= GTA01BL_SUSPENDED; ++ gta01bl_send_intensity(gta01_backlight_device); ++ return 0; ++} ++ ++static int gta01bl_resume(struct platform_device *dev) ++{ ++ mutex_lock(>a01bl.mutex); ++ gta01bl_init_hw(); ++ mutex_unlock(>a01bl.mutex); ++ ++ gta01bl_flags &= ~GTA01BL_SUSPENDED; ++ gta01bl_send_intensity(gta01_backlight_device); ++ return 0; ++} ++#else ++#define gta01bl_suspend NULL ++#define gta01bl_resume NULL ++#endif ++ ++static int gta01bl_get_intensity(struct backlight_device *bd) ++{ ++ return gta01bl.intensity; ++} ++ ++static int gta01bl_set_intensity(struct backlight_device *bd) ++{ ++ gta01bl_send_intensity(gta01_backlight_device); ++ return 0; ++} ++ ++/* ++ * Called when the battery is low to limit the backlight intensity. ++ * If limit==0 clear any limit, otherwise limit the intensity ++ */ ++void gta01bl_limit_intensity(int limit) ++{ ++ if (limit) ++ gta01bl_flags |= GTA01BL_BATTLOW; ++ else ++ gta01bl_flags &= ~GTA01BL_BATTLOW; ++ gta01bl_send_intensity(gta01_backlight_device); ++} ++EXPORT_SYMBOL_GPL(gta01bl_limit_intensity); ++ ++ ++static struct backlight_ops gta01bl_ops = { ++ .get_brightness = gta01bl_get_intensity, ++ .update_status = gta01bl_set_intensity, ++}; ++ ++static int __init gta01bl_probe(struct platform_device *pdev) ++{ ++ struct gta01bl_machinfo *machinfo = pdev->dev.platform_data; ++ int rc; ++ ++#ifdef GTA01_BACKLIGHT_ONOFF_ONLY ++ s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT); ++ gta01bl_prop.max_brightness = 1; ++#else ++ rc = gta01bl_init_hw(); ++ if (rc < 0) ++ return rc; ++#endif ++ mutex_init(>a01bl.mutex); ++ ++ if (!machinfo->limit_mask) ++ machinfo->limit_mask = -1; ++ ++ gta01_backlight_device = backlight_device_register("gta01-bl", ++ &pdev->dev, NULL, ++ >a01bl_ops); ++ if (IS_ERR(gta01_backlight_device)) ++ return PTR_ERR(gta01_backlight_device); ++ ++ gta01bl_prop.power = FB_BLANK_UNBLANK; ++ gta01bl_prop.brightness = gta01bl_prop.max_brightness; ++ memcpy(>a01_backlight_device->props, ++ >a01bl_prop, sizeof(gta01bl_prop)); ++ gta01bl_send_intensity(gta01_backlight_device); ++ ++ return 0; ++} ++ ++static int gta01bl_remove(struct platform_device *dev) ++{ ++#ifndef GTA01_BACKLIGHT_ONOFF_ONLY ++ s3c2410_pwm_disable(>a01bl.pwm); ++#endif ++ backlight_device_unregister(gta01_backlight_device); ++ mutex_destroy(>a01bl.mutex); ++ ++ s3c2410_gpio_cfgpin(GTA01_GPIO_BACKLIGHT, S3C2410_GPIO_OUTPUT); ++ s3c2410_gpio_setpin(GTA01_GPIO_BACKLIGHT, 1); ++ ++ return 0; ++} ++ ++static struct platform_driver gta01bl_driver = { ++ .probe = gta01bl_probe, ++ .remove = gta01bl_remove, ++ .suspend = gta01bl_suspend, ++ .resume = gta01bl_resume, ++ .driver = { ++ .name = "gta01-bl", ++ }, ++}; ++ ++static int __init gta01bl_init(void) ++{ ++ return platform_driver_register(>a01bl_driver); ++} ++ ++static void __exit gta01bl_exit(void) ++{ ++ platform_driver_unregister(>a01bl_driver); ++} ++ ++module_init(gta01bl_init); ++module_exit(gta01bl_exit); ++ ++MODULE_DESCRIPTION("FIC GTA01 (Neo1973) Backlight Driver"); ++MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); ++MODULE_LICENSE("GPL"); +-- +1.5.6.3 + |