[mirror_ubuntu-jammy-kernel.git] / drivers / leds / leds-cobalt-raq.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  LEDs driver for the Cobalt Raq series.
 *
 *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
 */
#include <linux/init.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/export.h>

#define LED_WEB		0x04
#define LED_POWER_OFF	0x08

static void __iomem *led_port;
static u8 led_value;
static DEFINE_SPINLOCK(led_value_lock);

static void raq_web_led_set(struct led_classdev *led_cdev,
			    enum led_brightness brightness)
{
	unsigned long flags;

	spin_lock_irqsave(&led_value_lock, flags);

	if (brightness)
		led_value |= LED_WEB;
	else
		led_value &= ~LED_WEB;
	writeb(led_value, led_port);

	spin_unlock_irqrestore(&led_value_lock, flags);
}

static struct led_classdev raq_web_led = {
	.name		= "raq::web",
	.brightness_set	= raq_web_led_set,
};

static void raq_power_off_led_set(struct led_classdev *led_cdev,
				  enum led_brightness brightness)
{
	unsigned long flags;

	spin_lock_irqsave(&led_value_lock, flags);

	if (brightness)
		led_value |= LED_POWER_OFF;
	else
		led_value &= ~LED_POWER_OFF;
	writeb(led_value, led_port);

	spin_unlock_irqrestore(&led_value_lock, flags);
}

static struct led_classdev raq_power_off_led = {
	.name			= "raq::power-off",
	.brightness_set		= raq_power_off_led_set,
	.default_trigger	= "power-off",
};

static int cobalt_raq_led_probe(struct platform_device *pdev)
{
	struct resource *res;
	int retval;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -EBUSY;

	led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
	if (!led_port)
		return -ENOMEM;

	retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
	if (retval)
		goto err_null;

	retval = led_classdev_register(&pdev->dev, &raq_web_led);
	if (retval)
		goto err_unregister;

	return 0;

err_unregister:
	led_classdev_unregister(&raq_power_off_led);

err_null:
	led_port = NULL;

	return retval;
}

static struct platform_driver cobalt_raq_led_driver = {
	.probe	= cobalt_raq_led_probe,
	.driver = {
		.name	= "cobalt-raq-leds",
	},
};

builtin_platform_driver(cobalt_raq_led_driver);
Commit	Line	Data
16216333	1	// SPDX-License-Identifier: GPL-2.0-or-later
97da7aaf YY	2	/*
	3	* LEDs driver for the Cobalt Raq series.
	4	*
ada8e951	5	* Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
97da7aaf YY	6	*/
	7	#include <linux/init.h>
	8	#include <linux/io.h>
	9	#include <linux/ioport.h>
	10	#include <linux/leds.h>
	11	#include <linux/platform_device.h>
	12	#include <linux/spinlock.h>
	13	#include <linux/types.h>
d131c496	14	#include <linux/export.h>
97da7aaf YY	15
	16	#define LED_WEB 0x04
	17	#define LED_POWER_OFF 0x08
	18
	19	static void __iomem *led_port;
	20	static u8 led_value;
	21	static DEFINE_SPINLOCK(led_value_lock);
	22
	23	static void raq_web_led_set(struct led_classdev *led_cdev,
4d404fd5	24	enum led_brightness brightness)
97da7aaf YY	25	{
	26	unsigned long flags;
	27
	28	spin_lock_irqsave(&led_value_lock, flags);
	29
	30	if (brightness)
	31	led_value \|= LED_WEB;
	32	else
	33	led_value &= ~LED_WEB;
	34	writeb(led_value, led_port);
	35
	36	spin_unlock_irqrestore(&led_value_lock, flags);
	37	}
	38
	39	static struct led_classdev raq_web_led = {
db3f5207	40	.name = "raq::web",
97da7aaf YY	41	.brightness_set = raq_web_led_set,
	42	};
	43
	44	static void raq_power_off_led_set(struct led_classdev *led_cdev,
4d404fd5	45	enum led_brightness brightness)
97da7aaf YY	46	{
	47	unsigned long flags;
	48
	49	spin_lock_irqsave(&led_value_lock, flags);
	50
	51	if (brightness)
	52	led_value \|= LED_POWER_OFF;
	53	else
	54	led_value &= ~LED_POWER_OFF;
	55	writeb(led_value, led_port);
	56
	57	spin_unlock_irqrestore(&led_value_lock, flags);
	58	}
	59
	60	static struct led_classdev raq_power_off_led = {
db3f5207	61	.name = "raq::power-off",
97da7aaf YY	62	.brightness_set = raq_power_off_led_set,
	63	.default_trigger = "power-off",
	64	};
	65
98ea1ea2	66	static int cobalt_raq_led_probe(struct platform_device *pdev)
97da7aaf YY	67	{
	68	struct resource *res;
	69	int retval;
	70
	71	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	72	if (!res)
	73	return -EBUSY;
	74
50e51943	75	led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
97da7aaf YY	76	if (!led_port)
	77	return -ENOMEM;
	78
	79	retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
	80	if (retval)
50e51943	81	goto err_null;
97da7aaf YY	82
	83	retval = led_classdev_register(&pdev->dev, &raq_web_led);
	84	if (retval)
	85	goto err_unregister;
	86
	87	return 0;
	88
	89	err_unregister:
	90	led_classdev_unregister(&raq_power_off_led);
	91
50e51943	92	err_null:
97da7aaf YY	93	led_port = NULL;
	94
	95	return retval;
	96	}
	97
97da7aaf YY	98	static struct platform_driver cobalt_raq_led_driver = {
97da7aaf YY	99	.probe = cobalt_raq_led_probe,
97da7aaf YY	100	.driver = {
97da7aaf YY	101	.name = "cobalt-raq-leds",
97da7aaf YY	102	},
	103	};
	104
cee0122d	105	builtin_platform_driver(cobalt_raq_led_driver);