Commit dfc034a0 authored by Dr. David Alan Gilbert's avatar Dr. David Alan Gilbert Committed by Lee Jones
Browse files

backlight: pcf50633-backlight: Remove unused driver 

The pcf50633 was used as part of the OpenMoko devices but
the support for its main chip was recently removed in:
commit 61b7f892 ("ARM: s3c: remove all s3c24xx support")

See https://lore.kernel.org/all/Z8z236h4B5A6Ki3D@gallifrey/



Remove it.

Signed-off-by: default avatar"Dr. David Alan Gilbert" <linux@treblig.org>
Link: https://lore.kernel.org/r/20250311014959.743322-8-linux@treblig.org


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent c9fe7858

drivers/video/backlight/Kconfig

+0 −7
Original line number Diff line number Diff line
@@ -370,13 +370,6 @@ config BACKLIGHT_88PM860X 
	help

	  Say Y to enable the backlight driver for Marvell 88PM8606.



config BACKLIGHT_PCF50633

	tristate "Backlight driver for NXP PCF50633 MFD"

	depends on MFD_PCF50633

	help

	  If you have a backlight driven by a NXP PCF50633 MFD, say Y here to

	  enable its driver.



config BACKLIGHT_AAT2870

	tristate "AnalogicTech AAT2870 Backlight"

	depends on MFD_AAT2870_CORE

drivers/video/backlight/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -50,7 +50,6 @@ obj-$(CONFIG_BACKLIGHT_MP3309C) += mp3309c.o 
obj-$(CONFIG_BACKLIGHT_MT6370)		+= mt6370-backlight.o

obj-$(CONFIG_BACKLIGHT_OMAP1)		+= omap1_bl.o

obj-$(CONFIG_BACKLIGHT_PANDORA)		+= pandora_bl.o

obj-$(CONFIG_BACKLIGHT_PCF50633)	+= pcf50633-backlight.o

obj-$(CONFIG_BACKLIGHT_PWM)		+= pwm_bl.o

obj-$(CONFIG_BACKLIGHT_QCOM_WLED)	+= qcom-wled.o

obj-$(CONFIG_BACKLIGHT_RT4831)		+= rt4831-backlight.o

drivers/video/backlight/pcf50633-backlight.c

deleted100644 → 0
+0 −154
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-or-later

/*

 *  Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>

 *      PCF50633 backlight device driver

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/platform_device.h>



#include <linux/backlight.h>



#include <linux/mfd/pcf50633/core.h>

#include <linux/mfd/pcf50633/backlight.h>



struct pcf50633_bl {

	struct pcf50633 *pcf;

	struct backlight_device *bl;



	unsigned int brightness;

	unsigned int brightness_limit;

};



/*

 * pcf50633_bl_set_brightness_limit

 *

 * Update the brightness limit for the pc50633 backlight. The actual brightness

 * will not go above the limit. This is useful to limit power drain for example

 * on low battery.

 *

 * @dev: Pointer to a pcf50633 device

 * @limit: The brightness limit. Valid values are 0-63

 */

int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit)

{

	struct pcf50633_bl *pcf_bl = platform_get_drvdata(pcf->bl_pdev);



	if (!pcf_bl)

		return -ENODEV;



	pcf_bl->brightness_limit = limit & 0x3f;

	backlight_update_status(pcf_bl->bl);



	return 0;

}



static int pcf50633_bl_update_status(struct backlight_device *bl)

{

	struct pcf50633_bl *pcf_bl = bl_get_data(bl);

	unsigned int new_brightness;





	if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK) ||

		bl->props.power != BACKLIGHT_POWER_ON)

		new_brightness = 0;

	else if (bl->props.brightness < pcf_bl->brightness_limit)

		new_brightness = bl->props.brightness;

	else

		new_brightness = pcf_bl->brightness_limit;





	if (pcf_bl->brightness == new_brightness)

		return 0;



	if (new_brightness) {

		pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDOUT,

					new_brightness);

		if (!pcf_bl->brightness)

			pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 1);

	} else {

		pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 0);

	}



	pcf_bl->brightness = new_brightness;



	return 0;

}



static int pcf50633_bl_get_brightness(struct backlight_device *bl)

{

	struct pcf50633_bl *pcf_bl = bl_get_data(bl);



	return pcf_bl->brightness;

}



static const struct backlight_ops pcf50633_bl_ops = {

	.get_brightness = pcf50633_bl_get_brightness,

	.update_status	= pcf50633_bl_update_status,

	.options	= BL_CORE_SUSPENDRESUME,

};



static int pcf50633_bl_probe(struct platform_device *pdev)

{

	struct pcf50633_bl *pcf_bl;

	struct device *parent = pdev->dev.parent;

	struct pcf50633_platform_data *pcf50633_data = dev_get_platdata(parent);

	struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data;

	struct backlight_properties bl_props;



	pcf_bl = devm_kzalloc(&pdev->dev, sizeof(*pcf_bl), GFP_KERNEL);

	if (!pcf_bl)

		return -ENOMEM;



	memset(&bl_props, 0, sizeof(bl_props));

	bl_props.type = BACKLIGHT_RAW;

	bl_props.max_brightness = 0x3f;

	bl_props.power = BACKLIGHT_POWER_ON;



	if (pdata) {

		bl_props.brightness = pdata->default_brightness;

		pcf_bl->brightness_limit = pdata->default_brightness_limit;

	} else {

		bl_props.brightness = 0x3f;

		pcf_bl->brightness_limit = 0x3f;

	}



	pcf_bl->pcf = dev_to_pcf50633(pdev->dev.parent);



	pcf_bl->bl = devm_backlight_device_register(&pdev->dev, pdev->name,

						&pdev->dev, pcf_bl,

						&pcf50633_bl_ops, &bl_props);



	if (IS_ERR(pcf_bl->bl))

		return PTR_ERR(pcf_bl->bl);



	platform_set_drvdata(pdev, pcf_bl);



	pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time);



	/*

	 * Should be different from bl_props.brightness, so we do not exit

	 * update_status early the first time it's called

	 */

	pcf_bl->brightness = pcf_bl->bl->props.brightness + 1;



	backlight_update_status(pcf_bl->bl);



	return 0;

}



static struct platform_driver pcf50633_bl_driver = {

	.probe =	pcf50633_bl_probe,

	.driver = {

		.name = "pcf50633-backlight",

	},

};



module_platform_driver(pcf50633_bl_driver);



MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");

MODULE_DESCRIPTION("PCF50633 backlight driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:pcf50633-backlight");

include/linux/mfd/pcf50633/backlight.h

deleted100644 → 0
+0 −42
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-or-later */

/*

 *  Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>

 *      PCF50633 backlight device driver

 */



#ifndef __LINUX_MFD_PCF50633_BACKLIGHT

#define __LINUX_MFD_PCF50633_BACKLIGHT



/*

* @default_brightness: Backlight brightness is initialized to this value

*

* Brightness to be used after the driver has been probed.

* Valid range 0-63.

*

* @default_brightness_limit: The actual brightness is limited by this value

*

* Brightness limit to be used after the driver has been probed. This is useful

* when it is not known how much power is available for the backlight during

* probe.

* Valid range 0-63. Can be changed later with pcf50633_bl_set_brightness_limit.

*

* @ramp_time: Display ramp time when changing brightness

*

* When changing the backlights brightness the change is not instant, instead

* it fades smooth from one state to another. This value specifies how long

* the fade should take. The lower the value the higher the fade time.

* Valid range 0-255

*/

struct pcf50633_bl_platform_data {

	unsigned int	default_brightness;

	unsigned int	default_brightness_limit;

	uint8_t		ramp_time;

};





struct pcf50633;



int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit);



#endif

include/linux/mfd/pcf50633/core.h

+0 −3
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ 
#include <linux/regulator/machine.h>

#include <linux/pm.h>

#include <linux/power_supply.h>

#include <linux/mfd/pcf50633/backlight.h>



struct pcf50633;

struct regmap;
@@ -42,8 +41,6 @@ struct pcf50633_platform_data { 
	void (*force_shutdown)(struct pcf50633 *);



	u8 resumers[5];



	struct pcf50633_bl_platform_data *backlight_data;

};



struct pcf50633_irq {