rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2018 MediaTek Inc. |
| 3 | * |
| 4 | * This program is free software: you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | |
| 17 | #define MET_USER_EVENT_SUPPORT |
| 18 | #include "met_drv.h" |
| 19 | #include "trace.h" |
| 20 | |
| 21 | static int met_backlight_enable; |
| 22 | static DEFINE_SPINLOCK(met_backlight_lock); |
| 23 | static struct kobject *kobj_met_backlight; |
| 24 | |
| 25 | static ssize_t bl_tag_enable_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf); |
| 26 | static ssize_t bl_tag_enable_store(struct kobject *kobj, |
| 27 | struct kobj_attribute *attr, const char *buf, size_t n); |
| 28 | static struct kobj_attribute bl_tag_enable_attr = |
| 29 | __ATTR(backlight_tag_enable, 0664, bl_tag_enable_show, bl_tag_enable_store); |
| 30 | |
| 31 | int enable_met_backlight_tag_real(void) |
| 32 | { |
| 33 | return met_backlight_enable; |
| 34 | } |
| 35 | |
| 36 | int output_met_backlight_tag_real(int level) |
| 37 | { |
| 38 | int ret; |
| 39 | unsigned long flags; |
| 40 | |
| 41 | spin_lock_irqsave(&met_backlight_lock, flags); |
| 42 | #ifdef CONFIG_MET_MODULE |
| 43 | ret = met_tag_oneshot_real(33880, "_MM_BL_", level); |
| 44 | #else |
| 45 | ret = met_tag_oneshot(33880, "_MM_BL_", level); |
| 46 | #endif |
| 47 | spin_unlock_irqrestore(&met_backlight_lock, flags); |
| 48 | |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | static ssize_t bl_tag_enable_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) |
| 53 | { |
| 54 | int ret; |
| 55 | |
| 56 | ret = snprintf(buf, PAGE_SIZE, "%d\n", met_backlight_enable); |
| 57 | |
| 58 | return ret; |
| 59 | } |
| 60 | |
| 61 | static ssize_t bl_tag_enable_store(struct kobject *kobj, |
| 62 | struct kobj_attribute *attr, const char *buf, size_t n) |
| 63 | { |
| 64 | int value; |
| 65 | |
| 66 | if ((n == 0) || (buf == NULL)) |
| 67 | return -EINVAL; |
| 68 | |
| 69 | if (kstrtoint(buf, 0, &value) != 0) |
| 70 | return -EINVAL; |
| 71 | |
| 72 | if (value < 0) |
| 73 | return -EINVAL; |
| 74 | |
| 75 | met_backlight_enable = value; |
| 76 | |
| 77 | return n; |
| 78 | } |
| 79 | |
| 80 | static int met_backlight_create(struct kobject *parent) |
| 81 | { |
| 82 | int ret = 0; |
| 83 | |
| 84 | kobj_met_backlight = parent; |
| 85 | |
| 86 | ret = sysfs_create_file(kobj_met_backlight, &bl_tag_enable_attr.attr); |
| 87 | if (ret != 0) { |
| 88 | pr_debug("Failed to create montype0 in sysfs\n"); |
| 89 | return ret; |
| 90 | } |
| 91 | |
| 92 | return ret; |
| 93 | } |
| 94 | |
| 95 | static void met_backlight_delete(void) |
| 96 | { |
| 97 | sysfs_remove_file(kobj_met_backlight, &bl_tag_enable_attr.attr); |
| 98 | kobj_met_backlight = NULL; |
| 99 | } |
| 100 | |
| 101 | struct metdevice met_backlight = { |
| 102 | .name = "backlight", |
| 103 | .owner = THIS_MODULE, |
| 104 | .type = MET_TYPE_BUS, |
| 105 | .create_subfs = met_backlight_create, |
| 106 | .delete_subfs = met_backlight_delete, |
| 107 | .cpu_related = 0, |
| 108 | }; |
| 109 | EXPORT_SYMBOL(met_backlight); |