File 0001-added-driver-for-joggler-backlight-joggler-backlight.patch of Package kernel-adaptation-joggler

From 4efda61a1e167bb4023259e00c3b294261b58f60 Mon Sep 17 00:00:00 2001
From: Jools Wills <buzz@exotica.org.uk>
Date: Sat, 24 Dec 2011 03:23:59 +0000
Subject: [PATCH 1/4] added: driver for joggler backlight
 (joggler-backlight-2.6.32-v1.patch) with fixes for
 building on 2.6.34.7+

---
 drivers/video/backlight/Kconfig        |    8 ++
 drivers/video/backlight/Makefile       |    1 +
 drivers/video/backlight/openframe_bl.c |  143 ++++++++++++++++++++++++++++++++
 3 files changed, 152 insertions(+), 0 deletions(-)
 create mode 100644 drivers/video/backlight/openframe_bl.c

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 278aeaa..9024c81 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -342,6 +342,14 @@ config BACKLIGHT_AAT2870
 	  If you have a AnalogicTech AAT2870 say Y to enable the
 	  backlight driver.
 
+config BACKLIGHT_OPENFRAME
+	tristate "Openframe Backlight Driver"
+	depends on BACKLIGHT_CLASS_DEVICE && PCI && X86
+	default n
+	help
+	  If you have an OpenFrame device say Y to enable the
+	  backlight driver.
+
 endif # BACKLIGHT_CLASS_DEVICE
 
 endif # BACKLIGHT_LCD_SUPPORT
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index fdd1fc4..26038d4 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -39,4 +39,5 @@ obj-$(CONFIG_BACKLIGHT_ADP8870)	+= adp8870_bl.o
 obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
 obj-$(CONFIG_BACKLIGHT_PCF50633)	+= pcf50633-backlight.o
 obj-$(CONFIG_BACKLIGHT_AAT2870) += aat2870_bl.o
+obj-$(CONFIG_BACKLIGHT_OPENFRAME) += openframe_bl.o
 
diff --git a/drivers/video/backlight/openframe_bl.c b/drivers/video/backlight/openframe_bl.c
new file mode 100644
index 0000000..0715084
--- /dev/null
+++ b/drivers/video/backlight/openframe_bl.c
@@ -0,0 +1,143 @@
+/*
+ *  Backlight Driver for Openframe devices
+ *
+ *  Copyright (c) 2010 Andrew de Quincey
+ *
+ *  Based onprogear_bl.c driver by Marcin Juszkiewicz
+ *  <linux at hrw dot one dot pl>
+ *
+ *  Based on Progear LCD driver by M Schacht
+ *  <mschacht at alumni dot washington dot edu>
+ *
+ *  Based on Sharp's Corgi Backlight Driver
+ *  Based on Backlight Driver for HP Jornada 680
+ *
+ *  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/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/pci.h>
+
+static struct pci_dev *gfx_dev = NULL;
+static u32 *bl_baseptr = NULL;
+
+static int openframe_set_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;
+
+	*bl_baseptr = (intensity << 1) | 0x400000;
+
+	return 0;
+}
+
+static int openframe_get_intensity(struct backlight_device *bd)
+{
+	int intensity;
+
+	intensity = (*bl_baseptr >> 1) & 0x2f;
+
+	return intensity;
+}
+
+static struct backlight_ops openframe_ops = {
+	.get_brightness = openframe_get_intensity,
+	.update_status = openframe_set_intensity,
+};
+
+static int openframe_probe(struct platform_device *pdev)
+{
+	u32 temp;
+	struct backlight_device *openframe_backlight_device;
+	struct backlight_properties props;
+
+	gfx_dev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x8108, NULL);
+	if (!gfx_dev) {
+		printk("Intel SCH Poulsbo graphics controller not found.\n");
+		return -ENODEV;
+	}
+
+	pci_read_config_dword(gfx_dev, 16, &temp);
+	bl_baseptr = ioremap(temp + 0x61254, 4);
+	memset(&props, 0, sizeof(struct backlight_properties));
+	props.max_brightness = 32;
+	props.power = FB_BLANK_UNBLANK;
+	props.type = BACKLIGHT_PLATFORM;
+	props.brightness = 32;
+	openframe_backlight_device = backlight_device_register("openframe-bl",
+							     &pdev->dev, NULL,
+							     &openframe_ops, &props);
+	if (IS_ERR(openframe_backlight_device)) {
+		iounmap(bl_baseptr);
+		pci_dev_put(gfx_dev);
+		return PTR_ERR(openframe_backlight_device);
+	}
+	platform_set_drvdata(pdev, openframe_backlight_device);
+
+	openframe_set_intensity(openframe_backlight_device);
+
+	return 0;
+}
+
+static int openframe_remove(struct platform_device *pdev)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+	backlight_device_unregister(bd);
+
+	iounmap(bl_baseptr);
+	pci_dev_put(gfx_dev);
+
+	return 0;
+}
+
+static struct platform_driver openframe_driver = {
+	.probe = openframe_probe,
+	.remove = openframe_remove,
+	.driver = {
+		   .name = "openframe-bl",
+		   },
+};
+
+static struct platform_device *openframe_device;
+
+static int __init openframe_init(void)
+{
+	int ret = platform_driver_register(&openframe_driver);
+
+	if (ret)
+		return ret;
+	openframe_device = platform_device_register_simple("openframe-bl", -1,
+								NULL, 0);
+	if (IS_ERR(openframe_device)) {
+		platform_driver_unregister(&openframe_driver);
+		return PTR_ERR(openframe_device);
+	}
+
+	return 0;
+}
+
+static void __exit openframe_exit(void)
+{
+	platform_device_unregister(openframe_device);
+	platform_driver_unregister(&openframe_driver);
+}
+
+module_init(openframe_init);
+module_exit(openframe_exit);
+
+MODULE_AUTHOR("Andrew de Quincey <adq@lidskialf.net>");
+MODULE_DESCRIPTION("Openframe Backlight Driver");
+MODULE_LICENSE("GPL");
-- 
1.7.6.3