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/*
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* LED driver for the RouterBOARD 750 |
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* |
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* Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/platform_device.h> |
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#include <linux/leds.h> |
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#include <asm/mach-ar71xx/mach-rb750.h> |
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#define DRV_NAME "leds-rb750" |
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struct rb750_led_dev { |
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struct led_classdev cdev; |
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u32 mask; |
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int active_low; |
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}; |
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struct rb750_led_drvdata { |
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struct rb750_led_dev *led_devs; |
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int num_leds; |
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}; |
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static inline struct rb750_led_dev *to_rbled(struct led_classdev *led_cdev) |
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{ |
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return (struct rb750_led_dev *)container_of(led_cdev, |
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struct rb750_led_dev, cdev); |
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} |
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static void rb750_led_brightness_set(struct led_classdev *led_cdev, |
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enum led_brightness value) |
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{ |
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struct rb750_led_dev *rbled = to_rbled(led_cdev); |
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int level; |
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level = (value == LED_OFF) ? 0 : 1; |
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level ^= rbled->active_low; |
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if (level) |
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rb750_latch_change(0, rbled->mask); |
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else |
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rb750_latch_change(rbled->mask, 0); |
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} |
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static int __devinit rb750_led_probe(struct platform_device *pdev) |
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{ |
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struct rb750_led_platform_data *pdata; |
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struct rb750_led_drvdata *drvdata; |
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int ret = 0; |
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int i; |
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pdata = pdev->dev.platform_data; |
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if (!pdata) |
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return -EINVAL; |
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drvdata = kzalloc(sizeof(struct rb750_led_drvdata) + |
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sizeof(struct rb750_led_dev) * pdata->num_leds, |
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GFP_KERNEL); |
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if (!drvdata) |
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return -ENOMEM; |
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drvdata->num_leds = pdata->num_leds; |
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drvdata->led_devs = (struct rb750_led_dev *) &drvdata[1]; |
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for (i = 0; i < drvdata->num_leds; i++) { |
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struct rb750_led_dev *rbled = &drvdata->led_devs[i]; |
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struct rb750_led_data *led_data = &pdata->leds[i]; |
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rbled->cdev.name = led_data->name; |
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rbled->cdev.default_trigger = led_data->default_trigger; |
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rbled->cdev.brightness_set = rb750_led_brightness_set; |
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rbled->cdev.brightness = LED_OFF; |
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rbled->mask = led_data->mask; |
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rbled->active_low = !!led_data->active_low; |
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ret = led_classdev_register(&pdev->dev, &rbled->cdev); |
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if (ret) |
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goto err; |
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} |
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platform_set_drvdata(pdev, drvdata); |
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return 0; |
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err: |
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for (i = i - 1; i >= 0; i--) |
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led_classdev_unregister(&drvdata->led_devs[i].cdev); |
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kfree(drvdata); |
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return ret; |
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} |
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static int __devexit rb750_led_remove(struct platform_device *pdev) |
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{ |
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struct rb750_led_drvdata *drvdata; |
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int i; |
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drvdata = platform_get_drvdata(pdev); |
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for (i = 0; i < drvdata->num_leds; i++) |
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led_classdev_unregister(&drvdata->led_devs[i].cdev); |
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kfree(drvdata); |
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return 0; |
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} |
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static struct platform_driver rb750_led_driver = { |
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.probe = rb750_led_probe, |
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.remove = __devexit_p(rb750_led_remove), |
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.driver = { |
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.name = DRV_NAME, |
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.owner = THIS_MODULE, |
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}, |
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}; |
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MODULE_ALIAS("platform:leds-rb750"); |
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static int __init rb750_led_init(void) |
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{ |
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return platform_driver_register(&rb750_led_driver); |
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} |
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static void __exit rb750_led_exit(void) |
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{ |
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platform_driver_unregister(&rb750_led_driver); |
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} |
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module_init(rb750_led_init); |
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module_exit(rb750_led_exit); |
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MODULE_DESCRIPTION(DRV_NAME); |
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MODULE_DESCRIPTION("LED driver for the RouterBOARD 750"); |
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MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); |
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MODULE_LICENSE("GPL v2"); |
@ -0,0 +1,23 @@ |
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--- a/drivers/leds/Kconfig
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+++ b/drivers/leds/Kconfig
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@@ -243,6 +243,10 @@
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This option enables support for the USB LED found on the
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NETGEAR WNDR3700 board.
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+config LEDS_RB750
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+ tristate "LED driver for the Mikrotik RouterBOARD 750"
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+ depends on LEDS_CLASS && AR71XX_MACH_RB750
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+
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comment "LED Triggers"
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config LEDS_TRIGGERS
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--- a/drivers/leds/Makefile
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+++ b/drivers/leds/Makefile
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@@ -30,6 +30,7 @@
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obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
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obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
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obj-${CONFIG_LEDS_WNDR3700_USB} += leds-wndr3700-usb.o
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+obj-${CONFIG_LEDS_RB750} += leds-rb750.o
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# LED SPI Drivers
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obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
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@ -0,0 +1,23 @@ |
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--- a/drivers/leds/Kconfig
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+++ b/drivers/leds/Kconfig
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@@ -243,6 +243,10 @@
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This option enables support for the USB LED found on the
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NETGEAR WNDR3700 board.
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+config LEDS_RB750
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+ tristate "LED driver for the Mikrotik RouterBOARD 750"
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+ depends on LEDS_CLASS && AR71XX_MACH_RB750
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+
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comment "LED Triggers"
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config LEDS_TRIGGERS
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--- a/drivers/leds/Makefile
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+++ b/drivers/leds/Makefile
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@@ -30,6 +30,7 @@
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obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
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obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
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obj-${CONFIG_LEDS_WNDR3700_USB} += leds-wndr3700-usb.o
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+obj-${CONFIG_LEDS_RB750} += leds-rb750.o
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# LED SPI Drivers
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obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
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