Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm

* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (241 commits)
  [ARM] 5171/1: ep93xx: fix compilation of modules using clocks
  [ARM] 5133/2: at91sam9g20 defconfig file
  [ARM] 5130/4: Support for the at91sam9g20
  [ARM] 5160/1: IOP3XX: gpio/gpiolib support
  [ARM] at91: Fix NAND FLASH timings for at91sam9x evaluation kits.
  [ARM] 5084/1: zylonite: Register AC97 device
  [ARM] 5085/2: PXA: Move AC97 over to the new central device declaration model
  [ARM] 5120/1: pxa: correct platform driver names for PXA25x and PXA27x UDC drivers
  [ARM] 5147/1: pxaficp_ir: drop pxa_gpio_mode calls, as pin setting
  [ARM] 5145/1: PXA2xx: provide api to control IrDA pins state
  [ARM] 5144/1: pxaficp_ir: cleanup includes
  [ARM] pxa: remove pxa_set_cken()
  [ARM] pxa: allow clk aliases
  [ARM] Feroceon: don't disable BPU on boot
  [ARM] Orion: LED support for HP mv2120
  [ARM] Orion: add RD88F5181L-FXO support
  [ARM] Orion: add RD88F5181L-GE support
  [ARM] Orion: add Netgear WNR854T support
  [ARM] s3c2410_defconfig: update for current build
  [ARM] Acer n30: Minor style and indentation fixes.
  ...

4 files changed, 237 insertions, 0 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index dcd8073c236..30bf7f2f163 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -112,3 +112,10 @@ config BACKLIGHT_CARILLO_RANCH
 	help
 	  If you have a Intel LE80578 (Carillo Ranch) say Y to enable the
 	  backlight driver.
+
+config BACKLIGHT_PWM
+	tristate "Generic PWM based Backlight Driver"
+	depends on BACKLIGHT_CLASS_DEVICE && HAVE_PWM
+	help
+	  If you have a LCD backlight adjustable by PWM, say Y to enable
+	  this driver.
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 33f6c7cecc7..b51a7cd1250 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_BACKLIGHT_LOCOMO)	+= locomolcd.o
 obj-$(CONFIG_BACKLIGHT_OMAP1)	+= omap1_bl.o
 obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o
 obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o
+obj-$(CONFIG_BACKLIGHT_PWM)	+= pwm_bl.o
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
new file mode 100644
index 00000000000..6338d0e2fe0
--- /dev/null
+++ b/drivers/video/backlight/pwm_bl.c
@@ -0,0 +1,185 @@
+/*
+ * linux/drivers/video/backlight/pwm_bl.c
+ *
+ * simple PWM based backlight control, board code has to setup
+ * 1) pin configuration so PWM waveforms can output
+ * 2) platform_data casts to the PWM id (0/1/2/3 on PXA)
+ *
+ * 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/fb.h>
+#include <linux/backlight.h>
+#include <linux/err.h>
+#include <linux/pwm.h>
+#include <linux/pwm_backlight.h>
+
+struct pwm_bl_data {
+	struct pwm_device	*pwm;
+	unsigned int		period;
+	int			(*notify)(int brightness);
+};
+
+static int pwm_backlight_update_status(struct backlight_device *bl)
+{
+	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+	int brightness = bl->props.brightness;
+	int max = bl->props.max_brightness;
+
+	if (bl->props.power != FB_BLANK_UNBLANK)
+		brightness = 0;
+
+	if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+		brightness = 0;
+
+	if (pb->notify)
+		brightness = pb->notify(brightness);
+
+	if (brightness == 0) {
+		pwm_config(pb->pwm, 0, pb->period);
+		pwm_disable(pb->pwm);
+	} else {
+		pwm_config(pb->pwm, brightness * pb->period / max, pb->period);
+		pwm_enable(pb->pwm);
+	}
+	return 0;
+}
+
+static int pwm_backlight_get_brightness(struct backlight_device *bl)
+{
+	return bl->props.brightness;
+}
+
+static struct backlight_ops pwm_backlight_ops = {
+	.update_status	= pwm_backlight_update_status,
+	.get_brightness	= pwm_backlight_get_brightness,
+};
+
+static int pwm_backlight_probe(struct platform_device *pdev)
+{
+	struct platform_pwm_backlight_data *data = pdev->dev.platform_data;
+	struct backlight_device *bl;
+	struct pwm_bl_data *pb;
+	int ret;
+
+	if (!data)
+		return -EINVAL;
+
+	if (data->init) {
+		ret = data->init(&pdev->dev);
+		if (ret < 0)
+			return ret;
+	}
+
+	pb = kzalloc(sizeof(*pb), GFP_KERNEL);
+	if (!pb) {
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
+
+	pb->period = data->pwm_period_ns;
+	pb->notify = data->notify;
+
+	pb->pwm = pwm_request(data->pwm_id, "backlight");
+	if (IS_ERR(pb->pwm)) {
+		dev_err(&pdev->dev, "unable to request PWM for backlight\n");
+		ret = PTR_ERR(pb->pwm);
+		goto err_pwm;
+	}
+
+	bl = backlight_device_register(pdev->name, &pdev->dev,
+			pb, &pwm_backlight_ops);
+	if (IS_ERR(bl)) {
+		dev_err(&pdev->dev, "failed to register backlight\n");
+		ret = PTR_ERR(bl);
+		goto err_bl;
+	}
+
+	bl->props.max_brightness = data->max_brightness;
+	bl->props.brightness = data->dft_brightness;
+	backlight_update_status(bl);
+
+	platform_set_drvdata(pdev, bl);
+	return 0;
+
+err_bl:
+	pwm_free(pb->pwm);
+err_pwm:
+	kfree(pb);
+err_alloc:
+	if (data->exit)
+		data->exit(&pdev->dev);
+	return ret;
+}
+
+static int pwm_backlight_remove(struct platform_device *pdev)
+{
+	struct platform_pwm_backlight_data *data = pdev->dev.platform_data;
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+
+	backlight_device_unregister(bl);
+	pwm_config(pb->pwm, 0, pb->period);
+	pwm_disable(pb->pwm);
+	pwm_free(pb->pwm);
+	kfree(pb);
+	if (data->exit)
+		data->exit(&pdev->dev);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int pwm_backlight_suspend(struct platform_device *pdev,
+				 pm_message_t state)
+{
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
+
+	pwm_config(pb->pwm, 0, pb->period);
+	pwm_disable(pb->pwm);
+	return 0;
+}
+
+static int pwm_backlight_resume(struct platform_device *pdev)
+{
+	struct backlight_device *bl = platform_get_drvdata(pdev);
+
+	backlight_update_status(bl);
+	return 0;
+}
+#else
+#define pwm_backlight_suspend	NULL
+#define pwm_backlight_resume	NULL
+#endif
+
+static struct platform_driver pwm_backlight_driver = {
+	.driver		= {
+		.name	= "pwm-backlight",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= pwm_backlight_probe,
+	.remove		= pwm_backlight_remove,
+	.suspend	= pwm_backlight_suspend,
+	.resume		= pwm_backlight_resume,
+};
+
+static int __init pwm_backlight_init(void)
+{
+	return platform_driver_register(&pwm_backlight_driver);
+}
+module_init(pwm_backlight_init);
+
+static void __exit pwm_backlight_exit(void)
+{
+	platform_driver_unregister(&pwm_backlight_driver);
+}
+module_exit(pwm_backlight_exit);
+
+MODULE_DESCRIPTION("PWM based Backlight Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index fafe7db20d6..d0746261c95 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -1792,11 +1792,49 @@ failed:
 	return ret;
 }
 
+static int __devexit pxafb_remove(struct platform_device *dev)
+{
+	struct pxafb_info *fbi = platform_get_drvdata(dev);
+	struct resource *r;
+	int irq;
+	struct fb_info *info;
+
+	if (!fbi)
+		return 0;
+
+	info = &fbi->fb;
+
+	unregister_framebuffer(info);
+
+	pxafb_disable_controller(fbi);
+
+	if (fbi->fb.cmap.len)
+		fb_dealloc_cmap(&fbi->fb.cmap);
+
+	irq = platform_get_irq(dev, 0);
+	free_irq(irq, fbi);
+
+	dma_free_writecombine(&dev->dev, fbi->map_size,
+					fbi->map_cpu, fbi->map_dma);
+
+	iounmap(fbi->mmio_base);
+
+	r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	release_mem_region(r->start, r->end - r->start + 1);
+
+	clk_put(fbi->clk);
+	kfree(fbi);
+
+	return 0;
+}
+
 static struct platform_driver pxafb_driver = {
 	.probe		= pxafb_probe,
+	.remove 	= pxafb_remove,
 	.suspend	= pxafb_suspend,
 	.resume		= pxafb_resume,
 	.driver		= {
+		.owner	= THIS_MODULE,
 		.name	= "pxa2xx-fb",
 	},
 };
@@ -1809,7 +1847,13 @@ static int __init pxafb_init(void)
 	return platform_driver_register(&pxafb_driver);
 }
 
+static void __exit pxafb_exit(void)
+{
+	platform_driver_unregister(&pxafb_driver);
+}
+
 module_init(pxafb_init);
+module_exit(pxafb_exit);
 
 MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
 MODULE_LICENSE("GPL");