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- /*
- * nvec_paz00: OEM specific driver for Compal PAZ00 based devices
- *
- * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
- *
- * Authors: Ilya Petrov <ilya.muromec@gmail.com>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- */
- #include <linux/module.h>
- #include <linux/err.h>
- #include <linux/slab.h>
- #include <linux/leds.h>
- #include <linux/platform_device.h>
- #include "nvec.h"
- #define to_nvec_led(led_cdev) \
- container_of(led_cdev, struct nvec_led, cdev)
- #define NVEC_LED_REQ {'\x0d', '\x10', '\x45', '\x10', '\x00'}
- #define NVEC_LED_MAX 8
- struct nvec_led {
- struct led_classdev cdev;
- struct nvec_chip *nvec;
- };
- static void nvec_led_brightness_set(struct led_classdev *led_cdev,
- enum led_brightness value)
- {
- struct nvec_led *led = to_nvec_led(led_cdev);
- unsigned char buf[] = NVEC_LED_REQ;
- buf[4] = value;
- nvec_write_async(led->nvec, buf, sizeof(buf));
- led->cdev.brightness = value;
- }
- static int nvec_paz00_probe(struct platform_device *pdev)
- {
- struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
- struct nvec_led *led;
- int ret = 0;
- led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
- if (!led)
- return -ENOMEM;
- led->cdev.max_brightness = NVEC_LED_MAX;
- led->cdev.brightness_set = nvec_led_brightness_set;
- led->cdev.name = "paz00-led";
- led->cdev.flags |= LED_CORE_SUSPENDRESUME;
- led->nvec = nvec;
- platform_set_drvdata(pdev, led);
- ret = led_classdev_register(&pdev->dev, &led->cdev);
- if (ret < 0)
- return ret;
- /* to expose the default value to userspace */
- led->cdev.brightness = 0;
- return 0;
- }
- static int nvec_paz00_remove(struct platform_device *pdev)
- {
- struct nvec_led *led = platform_get_drvdata(pdev);
- led_classdev_unregister(&led->cdev);
- return 0;
- }
- static struct platform_driver nvec_paz00_driver = {
- .probe = nvec_paz00_probe,
- .remove = nvec_paz00_remove,
- .driver = {
- .name = "nvec-paz00",
- },
- };
- module_platform_driver(nvec_paz00_driver);
- MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
- MODULE_DESCRIPTION("Tegra NVEC PAZ00 driver");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:nvec-paz00");
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