Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/drivers/leds/leds-cobalt-qube.c b/kernel/drivers/leds/leds-cobalt-qube.c
new file mode 100644 (file)
index 0000000..d975220
--- /dev/null
+++ b/kernel/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");