mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Marek Behún](/assets/img/avatar_default.png)
This driver can be compiled on other platforms with small change if COMPILE_TEST=y. Signed-off-by: Marek Behún <marek.behun@nic.cz> Cc: Pavel Machek <pavel@ucw.cz> Cc: Dan Murphy <dmurphy@ti.com> Cc: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Pavel Machek <pavel@ucw.cz>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* LED Driver for SGI Octane machines
|
|
*/
|
|
|
|
#include <asm/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/leds.h>
|
|
|
|
#define IP30_LED_SYSTEM 0
|
|
#define IP30_LED_FAULT 1
|
|
|
|
struct ip30_led {
|
|
struct led_classdev cdev;
|
|
u32 __iomem *reg;
|
|
};
|
|
|
|
static void ip30led_set(struct led_classdev *led_cdev,
|
|
enum led_brightness value)
|
|
{
|
|
struct ip30_led *led = container_of(led_cdev, struct ip30_led, cdev);
|
|
|
|
writel(value, led->reg);
|
|
}
|
|
|
|
static int ip30led_create(struct platform_device *pdev, int num)
|
|
{
|
|
struct resource *res;
|
|
struct ip30_led *data;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, num);
|
|
if (!res)
|
|
return -EBUSY;
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->reg = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(data->reg))
|
|
return PTR_ERR(data->reg);
|
|
|
|
|
|
switch (num) {
|
|
case IP30_LED_SYSTEM:
|
|
data->cdev.name = "white:power";
|
|
break;
|
|
case IP30_LED_FAULT:
|
|
data->cdev.name = "red:fault";
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
data->cdev.brightness = readl(data->reg);
|
|
data->cdev.max_brightness = 1;
|
|
data->cdev.brightness_set = ip30led_set;
|
|
|
|
return devm_led_classdev_register(&pdev->dev, &data->cdev);
|
|
}
|
|
|
|
static int ip30led_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
|
|
ret = ip30led_create(pdev, IP30_LED_SYSTEM);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return ip30led_create(pdev, IP30_LED_FAULT);
|
|
}
|
|
|
|
static struct platform_driver ip30led_driver = {
|
|
.probe = ip30led_probe,
|
|
.driver = {
|
|
.name = "ip30-leds",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(ip30led_driver);
|
|
|
|
MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
|
|
MODULE_DESCRIPTION("SGI Octane LED driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:ip30-leds");
|