leds: Add HP Jornada 6xx driver

Add support for the LEDs on the HP Jornada 620/660/680/690 devices.

Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 120 insertions, 0 deletions

diff --git a/drivers/leds/leds-hp6xx.c b/drivers/leds/leds-hp6xx.c
new file mode 100644
index 000000000000..82d4ec384797
--- /dev/null
+++ b/drivers/leds/leds-hp6xx.c
@@ -0,0 +1,120 @@
+/*
+ * LED Triggers Core
+ * For the HP Jornada 620/660/680/690 handhelds
+ *
+ * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
+ *     this driver is based on leds-spitz.c by Richard Purdie.
+ *
+ * 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 <asm/hd64461.h>
+#include <asm/hp6xx.h>
+
+static void hp6xxled_green_set(struct led_classdev *led_cdev, enum led_brightness value)
+{
+        u8 v8;
+
+        v8 = inb(PKDR);
+        if (value)
+                outb(v8 & (~PKDR_LED_GREEN), PKDR);
+        else
+                outb(v8 | PKDR_LED_GREEN, PKDR);
+}
+
+static void hp6xxled_red_set(struct led_classdev *led_cdev, enum led_brightness value)
+{
+        u16 v16;
+
+        v16 = inw(HD64461_GPBDR);
+        if (value)
+                outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
+        else
+                outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
+}
+
+static struct led_classdev hp6xx_red_led = {
+        .name                   = "hp6xx:red",
+        .default_trigger        = "hp6xx-charge",
+        .brightness_set         = hp6xxled_red_set,
+};
+
+static struct led_classdev hp6xx_green_led = {
+        .name                   = "hp6xx:green",
+        .default_trigger        = "ide-disk",
+        .brightness_set         = hp6xxled_green_set,
+};
+
+#ifdef CONFIG_PM
+static int hp6xxled_suspend(struct platform_device *dev, pm_message_t state)
+{
+        led_classdev_suspend(&hp6xx_red_led);
+        led_classdev_suspend(&hp6xx_green_led);
+        return 0;
+}
+
+static int hp6xxled_resume(struct platform_device *dev)
+{
+        led_classdev_resume(&hp6xx_red_led);
+        led_classdev_resume(&hp6xx_green_led);
+        return 0;
+}
+#endif
+
+static int hp6xxled_probe(struct platform_device *pdev)
+{
+        int ret;
+
+        ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
+        if (ret < 0)
+                return ret;
+
+        ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
+        if (ret < 0)
+                led_classdev_unregister(&hp6xx_red_led);
+
+        return ret;
+}
+
+static int hp6xxled_remove(struct platform_device *pdev)
+{
+        led_classdev_unregister(&hp6xx_red_led);
+        led_classdev_unregister(&hp6xx_green_led);
+
+        return 0;
+}
+
+static struct platform_driver hp6xxled_driver = {
+        .probe          = hp6xxled_probe,
+        .remove         = hp6xxled_remove,
+#ifdef CONFIG_PM
+        .suspend        = hp6xxled_suspend,
+        .resume         = hp6xxled_resume,
+#endif
+        .driver         = {
+                .name           = "hp6xx-led",
+        },
+};
+
+static int __init hp6xxled_init(void)
+{
+        return platform_driver_register(&hp6xxled_driver);
+}
+
+static void __exit hp6xxled_exit(void)
+{
+        platform_driver_unregister(&hp6xxled_driver);
+}
+
+module_init(hp6xxled_init);
+module_exit(hp6xxled_exit);
+
+MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
+MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
+MODULE_LICENSE("GPL");