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Commit 2c0f5fb0 authored by Richard Purdie's avatar Richard Purdie Committed by Linus Torvalds
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[PATCH] backlight: corgi_bl: Generalise to support other Sharp SL hardware 



Generalise the Corgi backlight driver by moving the default intensity and
limit mask settings into the platform specific data structure.  This enables
the driver to support other Zaurus hardware, specifically the SL-6000x (Tosa)
model.

Also change the spinlock to a mutex (the spinlock is overkill).

Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 5f27a27b

arch/arm/mach-pxa/corgi.c

+2 −0
Original line number Diff line number Diff line
@@ -141,6 +141,8 @@ struct corgissp_machinfo corgi_ssp_machinfo = { 
 */

static struct corgibl_machinfo corgi_bl_machinfo = {

	.max_intensity = 0x2f,

	.default_intensity = 0x1f,

	.limit_mask = 0x0b,

	.set_bl_intensity = corgi_bl_set_intensity,

};

arch/arm/mach-pxa/spitz.c

+2 −0
Original line number Diff line number Diff line
@@ -220,6 +220,8 @@ struct corgissp_machinfo spitz_ssp_machinfo = { 
 * Spitz Backlight Device

 */

static struct corgibl_machinfo spitz_bl_machinfo = {

	.default_intensity = 0x1f,

	.limit_mask = 0x0b,

	.max_intensity = 0x2f,

};

drivers/video/backlight/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -43,11 +43,11 @@ config LCD_DEVICE 
	default y



config BACKLIGHT_CORGI

	tristate "Sharp Corgi Backlight Driver (SL-C7xx Series)"

	tristate "Sharp Corgi Backlight Driver (SL Series)"

	depends on BACKLIGHT_DEVICE && PXA_SHARPSL

	default y

	help

	  If you have a Sharp Zaurus SL-C7xx, say y to enable the

	  If you have a Sharp Zaurus SL-C7xx, SL-Cxx00 or SL-6000x say y to enable the

	  backlight driver.



config BACKLIGHT_HP680

drivers/video/backlight/corgi_bl.c

+13 −18
Original line number Diff line number Diff line 
/*

 *  Backlight Driver for Sharp Corgi

 *  Backlight Driver for Sharp Zaurus Handhelds (various models)

 *

 *  Copyright (c) 2004-2005 Richard Purdie

 *  Copyright (c) 2004-2006 Richard Purdie

 *

 *  Based on Sharp's 2.4 Backlight Driver

 *
@@ -15,21 +15,17 @@ 
#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/spinlock.h>

#include <linux/mutex.h>

#include <linux/fb.h>

#include <linux/backlight.h>



#include <asm/arch/sharpsl.h>

#include <asm/hardware/sharpsl_pm.h>



#define CORGI_DEFAULT_INTENSITY		0x1f

#define CORGI_LIMIT_MASK		0x0b



static int corgibl_intensity;

static void (*corgibl_mach_set_intensity)(int intensity);

static spinlock_t bl_lock = SPIN_LOCK_UNLOCKED;

static DEFINE_MUTEX(bl_mutex);

static struct backlight_properties corgibl_data;

static struct backlight_device *corgi_backlight_device;

static struct corgibl_machinfo *bl_machinfo;



static unsigned long corgibl_flags;

#define CORGIBL_SUSPENDED     0x01
@@ -37,7 +33,6 @@ static unsigned long corgibl_flags; 


static int corgibl_send_intensity(struct backlight_device *bd)

{

	unsigned long flags;

	void (*corgi_kick_batt)(void);

	int intensity = bd->props->brightness;
@@ -48,13 +43,11 @@ static int corgibl_send_intensity(struct backlight_device *bd) 
	if (corgibl_flags & CORGIBL_SUSPENDED)

		intensity = 0;

	if (corgibl_flags & CORGIBL_BATTLOW)

		intensity &= CORGI_LIMIT_MASK;



	spin_lock_irqsave(&bl_lock, flags);



	corgibl_mach_set_intensity(intensity);

		intensity &= bl_machinfo->limit_mask;



	spin_unlock_irqrestore(&bl_lock, flags);

 	mutex_lock(&bl_mutex);

	bl_machinfo->set_bl_intensity(intensity);

	mutex_unlock(&bl_mutex);



	corgibl_intensity = intensity;
@@ -122,8 +115,10 @@ static int __init corgibl_probe(struct platform_device *pdev) 
{

	struct corgibl_machinfo *machinfo = pdev->dev.platform_data;



	bl_machinfo = machinfo;

	corgibl_data.max_brightness = machinfo->max_intensity;

	corgibl_mach_set_intensity = machinfo->set_bl_intensity;

	if (!machinfo->limit_mask)

		machinfo->limit_mask = -1;



	corgi_backlight_device = backlight_device_register ("corgi-bl",

		NULL, &corgibl_data);
@@ -131,7 +126,7 @@ static int __init corgibl_probe(struct platform_device *pdev) 
		return PTR_ERR (corgi_backlight_device);



	corgibl_data.power = FB_BLANK_UNBLANK;

	corgibl_data.brightness = CORGI_DEFAULT_INTENSITY;

	corgibl_data.brightness = machinfo->default_intensity;

	corgibl_send_intensity(corgi_backlight_device);



	printk("Corgi Backlight Driver Initialized.\n");

include/asm-arm/arch-pxa/sharpsl.h

+2 −0
Original line number Diff line number Diff line
@@ -27,6 +27,8 @@ struct corgits_machinfo { 
 */

struct corgibl_machinfo {

	int max_intensity;

	int default_intensity;

	int limit_mask;

	void (*set_bl_intensity)(int intensity);

};

extern void corgibl_limit_intensity(int limit);