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105 lines
2.2 KiB
105 lines
2.2 KiB
// 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 <[email protected]> |
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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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