| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 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> |
| */ |
| |
| #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"); |