diff options
Diffstat (limited to 'tools/thermal/tmon/pid.c')
| -rw-r--r-- | tools/thermal/tmon/pid.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/tools/thermal/tmon/pid.c b/tools/thermal/tmon/pid.c index fd7e9e9d6f4a..da20088285bd 100644 --- a/tools/thermal/tmon/pid.c +++ b/tools/thermal/tmon/pid.c @@ -1,21 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pid.c PID controller for testing cooling devices * - * - * * Copyright (C) 2012 Intel Corporation. All rights reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 or later as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * * Author Name Jacob Pan <jacob.jun.pan@linux.intel.com> - * */ #include <unistd.h> @@ -38,7 +27,7 @@ /************************************************************************** * PID (Proportional-Integral-Derivative) controller is commonly used in - * linear control system, consider the the process. + * linear control system, consider the process. * G(s) = U(s)/E(s) * kp = proportional gain * ki = integral gain @@ -65,7 +54,6 @@ static double xk_1, xk_2; /* input temperature x[k-#] */ */ int init_thermal_controller(void) { - int ret = 0; /* init pid params */ p_param.ts = ticktime; @@ -76,7 +64,7 @@ int init_thermal_controller(void) p_param.t_target = target_temp_user; - return ret; + return 0; } void controller_reset(void) |