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Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option [no]_[pad]_[ctrl] any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 176 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* LEDs driver for the Cobalt Raq series.
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*
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* Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/export.h>
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#define LED_WEB 0x04
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#define LED_POWER_OFF 0x08
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static void __iomem *led_port;
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static u8 led_value;
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static DEFINE_SPINLOCK(led_value_lock);
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static void raq_web_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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unsigned long flags;
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spin_lock_irqsave(&led_value_lock, flags);
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if (brightness)
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led_value |= LED_WEB;
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else
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led_value &= ~LED_WEB;
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writeb(led_value, led_port);
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spin_unlock_irqrestore(&led_value_lock, flags);
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}
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static struct led_classdev raq_web_led = {
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.name = "raq::web",
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.brightness_set = raq_web_led_set,
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};
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static void raq_power_off_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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unsigned long flags;
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spin_lock_irqsave(&led_value_lock, flags);
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if (brightness)
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led_value |= LED_POWER_OFF;
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else
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led_value &= ~LED_POWER_OFF;
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writeb(led_value, led_port);
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spin_unlock_irqrestore(&led_value_lock, flags);
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}
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static struct led_classdev raq_power_off_led = {
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.name = "raq::power-off",
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.brightness_set = raq_power_off_led_set,
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.default_trigger = "power-off",
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};
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static int cobalt_raq_led_probe(struct platform_device *pdev)
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{
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struct resource *res;
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int retval;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EBUSY;
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led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
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if (!led_port)
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return -ENOMEM;
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retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
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if (retval)
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goto err_null;
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retval = led_classdev_register(&pdev->dev, &raq_web_led);
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if (retval)
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goto err_unregister;
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return 0;
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err_unregister:
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led_classdev_unregister(&raq_power_off_led);
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err_null:
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led_port = NULL;
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return retval;
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}
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static struct platform_driver cobalt_raq_led_driver = {
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.probe = cobalt_raq_led_probe,
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.driver = {
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.name = "cobalt-raq-leds",
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},
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};
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builtin_platform_driver(cobalt_raq_led_driver);
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