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path: root/drivers/leds/leds-cobalt-raq.c
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Diffstat (limited to 'drivers/leds/leds-cobalt-raq.c')
-rw-r--r--drivers/leds/leds-cobalt-raq.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/leds/leds-cobalt-raq.c b/drivers/leds/leds-cobalt-raq.c
new file mode 100644
index 000000000..06dbe18a2
--- /dev/null
+++ b/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);