swh:1:snp:c2847dfd741eae21606027cf29250d1ebcd63fb4
Tip revision: a351e9b9fc24e982ec2f0e76379a49826036da12 authored by Linus Torvalds on 01 May 2017, 02:47:48 UTC
Linux 4.11
Linux 4.11
Tip revision: a351e9b
nvec_paz00.c
/*
* 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 = devm_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 struct platform_driver nvec_paz00_driver = {
.probe = nvec_paz00_probe,
.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");