Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / leds / leds-net48xx.c

diff --git a/kernel/drivers/leds/leds-net48xx.c b/kernel/drivers/leds/leds-net48xx.c
new file mode 100644 (file)
index 0000000..ec3a2e8
--- /dev/null
+++ b/kernel/drivers/leds/leds-net48xx.c
@@ -0,0 +1,96 @@
+/*
+ * LEDs driver for Soekris net48xx
+ *
+ * Copyright (C) 2006 Chris Boot <bootc@bootc.net>
+ *
+ * Based on leds-ams-delta.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/nsc_gpio.h>
+#include <linux/scx200_gpio.h>
+#include <linux/module.h>
+
+#define DRVNAME "net48xx-led"
+#define NET48XX_ERROR_LED_GPIO 20
+
+static struct platform_device *pdev;
+
+static void net48xx_error_led_set(struct led_classdev *led_cdev,
+               enum led_brightness value)
+{
+       scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
+}
+
+static struct led_classdev net48xx_error_led = {
+       .name           = "net48xx::error",
+       .brightness_set = net48xx_error_led_set,
+       .flags          = LED_CORE_SUSPENDRESUME,
+};
+
+static int net48xx_led_probe(struct platform_device *pdev)
+{
+       return led_classdev_register(&pdev->dev, &net48xx_error_led);
+}
+
+static int net48xx_led_remove(struct platform_device *pdev)
+{
+       led_classdev_unregister(&net48xx_error_led);
+       return 0;
+}
+
+static struct platform_driver net48xx_led_driver = {
+       .probe          = net48xx_led_probe,
+       .remove         = net48xx_led_remove,
+       .driver         = {
+               .name           = DRVNAME,
+       },
+};
+
+static int __init net48xx_led_init(void)
+{
+       int ret;
+
+       /* small hack, but scx200_gpio doesn't set .dev if the probe fails */
+       if (!scx200_gpio_ops.dev) {
+               ret = -ENODEV;
+               goto out;
+       }
+
+       ret = platform_driver_register(&net48xx_led_driver);
+       if (ret < 0)
+               goto out;
+
+       pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
+       if (IS_ERR(pdev)) {
+               ret = PTR_ERR(pdev);
+               platform_driver_unregister(&net48xx_led_driver);
+               goto out;
+       }
+
+out:
+       return ret;
+}
+
+static void __exit net48xx_led_exit(void)
+{
+       platform_device_unregister(pdev);
+       platform_driver_unregister(&net48xx_led_driver);
+}
+
+module_init(net48xx_led_init);
+module_exit(net48xx_led_exit);
+
+MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
+MODULE_DESCRIPTION("Soekris net48xx LED driver");
+MODULE_LICENSE("GPL");
+