linux/drivers/leds/leds-cobalt-qube.c
Vaishali Thakkar aa4e252495 leds: leds-cobalt-qube: Use devm_led_classdev_register
Use resource-managed function devm_led_classdev_register instead
of led_classdev_register to make the error-path simpler.

To be compatible with the change, goto is replaced with direct
return, unneeded label err_null is dropped and unnecessary variable
retval is removed. Also, remove redundant cobalt_qube_led_remove.

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2015-11-03 08:59:09 +01:00

67 lines
1.6 KiB
C

/*
* 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;
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);
return devm_led_classdev_register(&pdev->dev, &qube_front_led);
}
static struct platform_driver cobalt_qube_led_driver = {
.probe = cobalt_qube_led_probe,
.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");