leds: add SGI IP30 led support (64d7e231) · Commits · 戴 / test

drivers/leds/Kconfig

+11 −0

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		@@ -846,6 +846,17 @@ config LEDS_TPS6105X
		It is a single boost converter primarily for white LEDs and
		audio amplifiers.

		config LEDS_IP30
		tristate "LED support for SGI Octane machines"
		depends on LEDS_CLASS
		depends on SGI_MFD_IOC3
		help
		This option enables support for the Red and White LEDs of
		SGI Octane machines.

		To compile this driver as a module, choose M here: the module
		will be called leds-ip30.

		comment "LED Triggers"
		source "drivers/leds/trigger/Kconfig"

drivers/leds/Makefile

+1 −0

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		@@ -86,6 +86,7 @@ obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o
		obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o
		obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o
		obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o
		obj-$(CONFIG_LEDS_IP30) += leds-ip30.o

		# LED SPI Drivers
		obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o

drivers/leds/leds-ip30.c

0 → 100644

+86 −0

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		// SPDX-License-Identifier: GPL-2.0
		/*
		* LED Driver for SGI Octane machines
		*/

		#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:system";
		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");

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