+++ /dev/null
-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
-
projects / openwrt / svn-archive / archive.git / blobdiff