leds: Add Cobalt Raq series LEDs support

Add Cobalt Raq series LEDs support.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 138 insertions, 0 deletions

diff --git a/drivers/leds/leds-cobalt-raq.c b/drivers/leds/leds-cobalt-raq.c
new file mode 100644
index 000000000000..6ebfff341e6c
--- /dev/null
+++ b/drivers/leds/leds-cobalt-raq.c
@@ -0,0 +1,138 @@
+/*
+ *  LEDs driver for the Cobalt Raq series.
+ *
+ *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ *
+ *  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>
+
+#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 __devinit 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 = ioremap(res->start, res->end - res->start + 1);
+        if (!led_port)
+                return -ENOMEM;
+
+        retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
+        if (retval)
+                goto err_iounmap;
+
+        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_iounmap:
+        iounmap(led_port);
+        led_port = NULL;
+
+        return retval;
+}
+
+static int __devexit cobalt_raq_led_remove(struct platform_device *pdev)
+{
+        led_classdev_unregister(&raq_power_off_led);
+        led_classdev_unregister(&raq_web_led);
+
+        if (led_port) {
+                iounmap(led_port);
+                led_port = NULL;
+        }
+
+        return 0;
+}
+
+static struct platform_driver cobalt_raq_led_driver = {
+        .probe  = cobalt_raq_led_probe,
+        .remove = __devexit_p(cobalt_raq_led_remove),
+        .driver = {
+                .name   = "cobalt-raq-leds",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init cobalt_raq_led_init(void)
+{
+        return platform_driver_register(&cobalt_raq_led_driver);
+}
+
+module_init(cobalt_raq_led_init);