leds: add SGI IP30 led support
This patch implemenets a driver to support the front panel LEDs of SGI Octane (IP30) workstations. Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
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@ -846,6 +846,17 @@ config LEDS_TPS6105X
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It is a single boost converter primarily for white LEDs and
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audio amplifiers.
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config LEDS_IP30
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tristate "LED support for SGI Octane machines"
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depends on LEDS_CLASS
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depends on SGI_MFD_IOC3
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help
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This option enables support for the Red and White LEDs of
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SGI Octane machines.
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To compile this driver as a module, choose M here: the module
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will be called leds-ip30.
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comment "LED Triggers"
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source "drivers/leds/trigger/Kconfig"
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@ -86,6 +86,7 @@ obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o
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obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o
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obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o
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obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o
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obj-$(CONFIG_LEDS_IP30) += leds-ip30.o
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# LED SPI Drivers
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obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o
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86
drivers/leds/leds-ip30.c
Normal file
86
drivers/leds/leds-ip30.c
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@ -0,0 +1,86 @@
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// 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 <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:system";
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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 <tbogendoerfer@suse.de>");
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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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