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87 lines
1.8 KiB
87 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* LED Driver for SGI Octane machines |
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*/ |
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#include <asm/io.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/platform_device.h> |
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#include <linux/leds.h> |
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#define IP30_LED_SYSTEM 0 |
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#define IP30_LED_FAULT 1 |
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struct ip30_led { |
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struct led_classdev cdev; |
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u32 __iomem *reg; |
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}; |
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static void ip30led_set(struct led_classdev *led_cdev, |
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enum led_brightness value) |
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{ |
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struct ip30_led *led = container_of(led_cdev, struct ip30_led, cdev); |
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writel(value, led->reg); |
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} |
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static int ip30led_create(struct platform_device *pdev, int num) |
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{ |
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struct resource *res; |
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struct ip30_led *data; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, num); |
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if (!res) |
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return -EBUSY; |
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); |
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if (!data) |
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return -ENOMEM; |
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data->reg = devm_ioremap_resource(&pdev->dev, res); |
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if (IS_ERR(data->reg)) |
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return PTR_ERR(data->reg); |
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switch (num) { |
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case IP30_LED_SYSTEM: |
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data->cdev.name = "white:power"; |
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break; |
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case IP30_LED_FAULT: |
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data->cdev.name = "red:fault"; |
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break; |
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default: |
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return -EINVAL; |
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} |
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data->cdev.brightness = readl(data->reg); |
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data->cdev.max_brightness = 1; |
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data->cdev.brightness_set = ip30led_set; |
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return devm_led_classdev_register(&pdev->dev, &data->cdev); |
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} |
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static int ip30led_probe(struct platform_device *pdev) |
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{ |
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int ret; |
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ret = ip30led_create(pdev, IP30_LED_SYSTEM); |
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if (ret < 0) |
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return ret; |
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return ip30led_create(pdev, IP30_LED_FAULT); |
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} |
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static struct platform_driver ip30led_driver = { |
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.probe = ip30led_probe, |
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.driver = { |
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.name = "ip30-leds", |
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}, |
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}; |
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module_platform_driver(ip30led_driver); |
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MODULE_AUTHOR("Thomas Bogendoerfer <[email protected]>"); |
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MODULE_DESCRIPTION("SGI Octane LED driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:ip30-leds");
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