1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/leds/leds-cobalt-raq.c b/drivers/leds/leds-cobalt-raq.c
new file mode 100644
index 0000000000..045c239c73
--- /dev/null
+++ b/drivers/leds/leds-cobalt-raq.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  LEDs driver for the Cobalt Raq series.
+ *
+ *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
+ */
+#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>
+#include <linux/export.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 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 = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (!led_port)
+		return -ENOMEM;
+
+	retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
+	if (retval)
+		goto err_null;
+
+	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_null:
+	led_port = NULL;
+
+	return retval;
+}
+
+static struct platform_driver cobalt_raq_led_driver = {
+	.probe	= cobalt_raq_led_probe,
+	.driver = {
+		.name	= "cobalt-raq-leds",
+	},
+};
+
+builtin_platform_driver(cobalt_raq_led_driver);