107 	struct _pid pid;  member
169 static inline void pid_reset(struct _pid *pid, int setpoint, int busy,  in pid_reset()  argument
171 	pid->setpoint = setpoint;  in pid_reset()
172 	pid->deadband  = deadband;  in pid_reset()
173 	pid->integral  = int_tofp(integral);  in pid_reset()
174 	pid->last_err  = int_tofp(setpoint) - int_tofp(busy);  in pid_reset()
177 static inline void pid_p_gain_set(struct _pid *pid, int percent)  in pid_p_gain_set()  argument
179 	pid->p_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_p_gain_set()
182 static inline void pid_i_gain_set(struct _pid *pid, int percent)  in pid_i_gain_set()  argument
184 	pid->i_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_i_gain_set()
187 static inline void pid_d_gain_set(struct _pid *pid, int percent)  in pid_d_gain_set()  argument
189 	pid->d_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_d_gain_set()
192 static signed int pid_calc(struct _pid *pid, int32_t busy)  in pid_calc()  argument
198 	fp_error = int_tofp(pid->setpoint) - busy;  in pid_calc()
200 	if (abs(fp_error) <= int_tofp(pid->deadband))  in pid_calc()
203 	pterm = mul_fp(pid->p_gain, fp_error);  in pid_calc()
205 	pid->integral += fp_error;  in pid_calc()
216 	if (pid->integral > integral_limit)  in pid_calc()
217 		pid->integral = integral_limit;  in pid_calc()
218 	if (pid->integral < -integral_limit)  in pid_calc()
219 		pid->integral = -integral_limit;  in pid_calc()
221 	dterm = mul_fp(pid->d_gain, fp_error - pid->last_err);  in pid_calc()
222 	pid->last_err = fp_error;  in pid_calc()
224 	result = pterm + mul_fp(pid->integral, pid->i_gain) + dterm;  in pid_calc()
231 	pid_p_gain_set(&cpu->pid, pid_params.p_gain_pct);  in intel_pstate_busy_pid_reset()
232 	pid_d_gain_set(&cpu->pid, pid_params.d_gain_pct);  in intel_pstate_busy_pid_reset()
233 	pid_i_gain_set(&cpu->pid, pid_params.i_gain_pct);  in intel_pstate_busy_pid_reset()
235 	pid_reset(&cpu->pid, pid_params.setpoint, 100, pid_params.deadband, 0);  in intel_pstate_busy_pid_reset()
844 	struct _pid *pid;  in intel_pstate_adjust_busy_pstate()  local
847 	pid = &cpu->pid;  in intel_pstate_adjust_busy_pstate()
850 	ctl = pid_calc(pid, busy_scaled);  in intel_pstate_adjust_busy_pstate()