Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 1 | /* |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 2 | * nvec_paz00: OEM specific driver for Compal PAZ00 based devices |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net> |
| 5 | * |
| 6 | * Authors: Ilya Petrov <ilya.muromec@gmail.com> |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file "COPYING" in the main directory of this archive |
| 10 | * for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/leds.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include "nvec.h" |
| 20 | |
| 21 | #define to_nvec_led(led_cdev) \ |
| 22 | container_of(led_cdev, struct nvec_led, cdev) |
| 23 | |
| 24 | #define NVEC_LED_REQ {'\x0d', '\x10', '\x45', '\x10', '\x00'} |
| 25 | |
| 26 | #define NVEC_LED_MAX 8 |
| 27 | |
| 28 | struct nvec_led { |
| 29 | struct led_classdev cdev; |
| 30 | struct nvec_chip *nvec; |
| 31 | }; |
| 32 | |
| 33 | static void nvec_led_brightness_set(struct led_classdev *led_cdev, |
| 34 | enum led_brightness value) |
| 35 | { |
| 36 | struct nvec_led *led = to_nvec_led(led_cdev); |
| 37 | unsigned char buf[] = NVEC_LED_REQ; |
Pawel Lebioda | fa79961 | 2014-07-03 21:15:57 +0200 | [diff] [blame] | 38 | |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 39 | buf[4] = value; |
| 40 | |
| 41 | nvec_write_async(led->nvec, buf, sizeof(buf)); |
| 42 | |
| 43 | led->cdev.brightness = value; |
| 44 | |
| 45 | } |
| 46 | |
Bill Pemberton | 4662080 | 2012-11-19 13:22:07 -0500 | [diff] [blame] | 47 | static int nvec_paz00_probe(struct platform_device *pdev) |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 48 | { |
| 49 | struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent); |
| 50 | struct nvec_led *led; |
| 51 | int ret = 0; |
| 52 | |
Marc Dietrich | f5e3352 | 2012-06-24 23:25:16 +0200 | [diff] [blame] | 53 | led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL); |
Somya Anand | 4c42d97 | 2015-03-16 19:34:11 +0530 | [diff] [blame] | 54 | if (!led) |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 55 | return -ENOMEM; |
| 56 | |
| 57 | led->cdev.max_brightness = NVEC_LED_MAX; |
| 58 | |
| 59 | led->cdev.brightness_set = nvec_led_brightness_set; |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 60 | led->cdev.name = "paz00-led"; |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 61 | led->cdev.flags |= LED_CORE_SUSPENDRESUME; |
| 62 | led->nvec = nvec; |
| 63 | |
| 64 | platform_set_drvdata(pdev, led); |
| 65 | |
| 66 | ret = led_classdev_register(&pdev->dev, &led->cdev); |
| 67 | if (ret < 0) |
Marc Dietrich | f5e3352 | 2012-06-24 23:25:16 +0200 | [diff] [blame] | 68 | return ret; |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 69 | |
| 70 | /* to expose the default value to userspace */ |
| 71 | led->cdev.brightness = 0; |
| 72 | |
| 73 | return 0; |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 74 | } |
| 75 | |
Bill Pemberton | 1a6a8a8 | 2012-11-19 13:26:41 -0500 | [diff] [blame] | 76 | static int nvec_paz00_remove(struct platform_device *pdev) |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 77 | { |
| 78 | struct nvec_led *led = platform_get_drvdata(pdev); |
| 79 | |
| 80 | led_classdev_unregister(&led->cdev); |
Marc Dietrich | f5e3352 | 2012-06-24 23:25:16 +0200 | [diff] [blame] | 81 | |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 82 | return 0; |
| 83 | } |
| 84 | |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 85 | static struct platform_driver nvec_paz00_driver = { |
| 86 | .probe = nvec_paz00_probe, |
Bill Pemberton | 44b90a3 | 2012-11-19 13:20:55 -0500 | [diff] [blame] | 87 | .remove = nvec_paz00_remove, |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 88 | .driver = { |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 89 | .name = "nvec-paz00", |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 90 | }, |
| 91 | }; |
| 92 | |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 93 | module_platform_driver(nvec_paz00_driver); |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 94 | |
| 95 | MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>"); |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 96 | MODULE_DESCRIPTION("Tegra NVEC PAZ00 driver"); |
Ilya Petrov | 97cc265 | 2011-09-27 19:00:44 +0200 | [diff] [blame] | 97 | MODULE_LICENSE("GPL"); |
Marc Dietrich | ac56268 | 2012-06-24 23:25:20 +0200 | [diff] [blame] | 98 | MODULE_ALIAS("platform:nvec-paz00"); |