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path: root/drivers/leds/leds-cobalt-qube.c
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Diffstat (limited to 'drivers/leds/leds-cobalt-qube.c')
-rw-r--r--drivers/leds/leds-cobalt-qube.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/leds/leds-cobalt-qube.c b/drivers/leds/leds-cobalt-qube.c
new file mode 100644
index 000000000..d97522080
--- /dev/null
+++ b/drivers/leds/leds-cobalt-qube.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
+ *
+ * Control the Cobalt Qube/RaQ front LED
+ */
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+
+#define LED_FRONT_LEFT 0x01
+#define LED_FRONT_RIGHT 0x02
+
+static void __iomem *led_port;
+static u8 led_value;
+
+static void qube_front_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ if (brightness)
+ led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
+ else
+ led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
+ writeb(led_value, led_port);
+}
+
+static struct led_classdev qube_front_led = {
+ .name = "qube::front",
+ .brightness = LED_FULL,
+ .brightness_set = qube_front_led_set,
+ .default_trigger = "default-on",
+};
+
+static int cobalt_qube_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;
+
+ led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
+ writeb(led_value, led_port);
+
+ retval = led_classdev_register(&pdev->dev, &qube_front_led);
+ if (retval)
+ goto err_null;
+
+ return 0;
+
+err_null:
+ led_port = NULL;
+
+ return retval;
+}
+
+static int cobalt_qube_led_remove(struct platform_device *pdev)
+{
+ led_classdev_unregister(&qube_front_led);
+
+ if (led_port)
+ led_port = NULL;
+
+ return 0;
+}
+
+static struct platform_driver cobalt_qube_led_driver = {
+ .probe = cobalt_qube_led_probe,
+ .remove = cobalt_qube_led_remove,
+ .driver = {
+ .name = "cobalt-qube-leds",
+ },
+};
+
+module_platform_driver(cobalt_qube_led_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Front LED support for Cobalt Server");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_ALIAS("platform:cobalt-qube-leds");