Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/drivers/leds/leds-cobalt-raq.c b/kernel/drivers/leds/leds-cobalt-raq.c
new file mode 100644 (file)
index 0000000..06dbe18
--- /dev/null
+++ b/kernel/drivers/leds/leds-cobalt-raq.c
@@ -0,0 +1,135 @@
+/*
+ *  LEDs driver for the Cobalt Raq series.
+ *
+ *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
+ *
+ *  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
+ */
+#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 int cobalt_raq_led_remove(struct platform_device *pdev)
+{
+       led_classdev_unregister(&raq_power_off_led);
+       led_classdev_unregister(&raq_web_led);
+
+       if (led_port)
+               led_port = NULL;
+
+       return 0;
+}
+
+static struct platform_driver cobalt_raq_led_driver = {
+       .probe  = cobalt_raq_led_probe,
+       .remove = cobalt_raq_led_remove,
+       .driver = {
+               .name   = "cobalt-raq-leds",
+       },
+};
+
+static int __init cobalt_raq_led_init(void)
+{
+       return platform_driver_register(&cobalt_raq_led_driver);
+}
+
+module_init(cobalt_raq_led_init);