ledtrig-transient.c (552c69b36ebd966186573b9c7a286b390935cce1) ledtrig-transient.c (2282e125a406e09331c5a785e3df29035c99a607)
1// SPDX-License-Identifier: GPL-2.0
2//
3// LED Kernel Transient Trigger
4//
5// Transient trigger allows one shot timer activation. Please refer to
6// Documentation/leds/ledtrig-transient.txt for details
7// Copyright (C) 2012 Shuah Khan <shuahkhan@gmail.com>
8//

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147}
148
149static DEVICE_ATTR(activate, 0644, transient_activate_show,
150 transient_activate_store);
151static DEVICE_ATTR(duration, 0644, transient_duration_show,
152 transient_duration_store);
153static DEVICE_ATTR(state, 0644, transient_state_show, transient_state_store);
154
1// SPDX-License-Identifier: GPL-2.0
2//
3// LED Kernel Transient Trigger
4//
5// Transient trigger allows one shot timer activation. Please refer to
6// Documentation/leds/ledtrig-transient.txt for details
7// Copyright (C) 2012 Shuah Khan <shuahkhan@gmail.com>
8//

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147}
148
149static DEVICE_ATTR(activate, 0644, transient_activate_show,
150 transient_activate_store);
151static DEVICE_ATTR(duration, 0644, transient_duration_show,
152 transient_duration_store);
153static DEVICE_ATTR(state, 0644, transient_state_show, transient_state_store);
154
155static void transient_trig_activate(struct led_classdev *led_cdev)
155static int transient_trig_activate(struct led_classdev *led_cdev)
156{
157 int rc;
158 struct transient_trig_data *tdata;
159
160 tdata = kzalloc(sizeof(struct transient_trig_data), GFP_KERNEL);
161 if (!tdata) {
162 dev_err(led_cdev->dev,
163 "unable to allocate transient trigger\n");
156{
157 int rc;
158 struct transient_trig_data *tdata;
159
160 tdata = kzalloc(sizeof(struct transient_trig_data), GFP_KERNEL);
161 if (!tdata) {
162 dev_err(led_cdev->dev,
163 "unable to allocate transient trigger\n");
164 return;
164 return 0;
165 }
166 led_cdev->trigger_data = tdata;
167 tdata->led_cdev = led_cdev;
168
169 rc = device_create_file(led_cdev->dev, &dev_attr_activate);
170 if (rc)
171 goto err_out;
172
173 rc = device_create_file(led_cdev->dev, &dev_attr_duration);
174 if (rc)
175 goto err_out_duration;
176
177 rc = device_create_file(led_cdev->dev, &dev_attr_state);
178 if (rc)
179 goto err_out_state;
180
181 timer_setup(&tdata->timer, transient_timer_function, 0);
182 led_cdev->activated = true;
183
165 }
166 led_cdev->trigger_data = tdata;
167 tdata->led_cdev = led_cdev;
168
169 rc = device_create_file(led_cdev->dev, &dev_attr_activate);
170 if (rc)
171 goto err_out;
172
173 rc = device_create_file(led_cdev->dev, &dev_attr_duration);
174 if (rc)
175 goto err_out_duration;
176
177 rc = device_create_file(led_cdev->dev, &dev_attr_state);
178 if (rc)
179 goto err_out_state;
180
181 timer_setup(&tdata->timer, transient_timer_function, 0);
182 led_cdev->activated = true;
183
184 return;
184 return 0;
185
186err_out_state:
187 device_remove_file(led_cdev->dev, &dev_attr_duration);
188err_out_duration:
189 device_remove_file(led_cdev->dev, &dev_attr_activate);
190err_out:
191 dev_err(led_cdev->dev, "unable to register transient trigger\n");
192 led_cdev->trigger_data = NULL;
193 kfree(tdata);
185
186err_out_state:
187 device_remove_file(led_cdev->dev, &dev_attr_duration);
188err_out_duration:
189 device_remove_file(led_cdev->dev, &dev_attr_activate);
190err_out:
191 dev_err(led_cdev->dev, "unable to register transient trigger\n");
192 led_cdev->trigger_data = NULL;
193 kfree(tdata);
194
195 return 0;
194}
195
196static void transient_trig_deactivate(struct led_classdev *led_cdev)
197{
198 struct transient_trig_data *transient_data = led_cdev->trigger_data;
199
200 if (led_cdev->activated) {
201 del_timer_sync(&transient_data->timer);

--- 33 unchanged lines hidden --- 		196}
197
198static void transient_trig_deactivate(struct led_classdev *led_cdev)
199{
200 struct transient_trig_data *transient_data = led_cdev->trigger_data;
201
202 if (led_cdev->activated) {
203 del_timer_sync(&transient_data->timer);

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