aa4e252495
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>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
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* Copyright 2006 - Florian Fainelli <florian@openwrt.org>
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*
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* Control the Cobalt Qube/RaQ front LED
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*/
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#define LED_FRONT_LEFT 0x01
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#define LED_FRONT_RIGHT 0x02
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static void __iomem *led_port;
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static u8 led_value;
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static void qube_front_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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if (brightness)
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led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
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else
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led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
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writeb(led_value, led_port);
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}
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static struct led_classdev qube_front_led = {
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.name = "qube::front",
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.brightness = LED_FULL,
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.brightness_set = qube_front_led_set,
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.default_trigger = "default-on",
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};
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static int cobalt_qube_led_probe(struct platform_device *pdev)
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{
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EBUSY;
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led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
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if (!led_port)
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return -ENOMEM;
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led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
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writeb(led_value, led_port);
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return devm_led_classdev_register(&pdev->dev, &qube_front_led);
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}
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static struct platform_driver cobalt_qube_led_driver = {
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.probe = cobalt_qube_led_probe,
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.driver = {
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.name = "cobalt-qube-leds",
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},
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};
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module_platform_driver(cobalt_qube_led_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Front LED support for Cobalt Server");
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MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
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MODULE_ALIAS("platform:cobalt-qube-leds");
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