109 	struct _pid pid;  member
192 static inline void pid_reset(struct _pid *pid, int setpoint, int busy,  in pid_reset()  argument
194 	pid->setpoint = setpoint;  in pid_reset()
195 	pid->deadband  = deadband;  in pid_reset()
196 	pid->integral  = int_tofp(integral);  in pid_reset()
197 	pid->last_err  = int_tofp(setpoint) - int_tofp(busy);  in pid_reset()
200 static inline void pid_p_gain_set(struct _pid *pid, int percent)  in pid_p_gain_set()  argument
202 	pid->p_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_p_gain_set()
205 static inline void pid_i_gain_set(struct _pid *pid, int percent)  in pid_i_gain_set()  argument
207 	pid->i_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_i_gain_set()
210 static inline void pid_d_gain_set(struct _pid *pid, int percent)  in pid_d_gain_set()  argument
212 	pid->d_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_d_gain_set()
215 static signed int pid_calc(struct _pid *pid, int32_t busy)  in pid_calc()  argument
221 	fp_error = int_tofp(pid->setpoint) - busy;  in pid_calc()
223 	if (abs(fp_error) <= int_tofp(pid->deadband))  in pid_calc()
226 	pterm = mul_fp(pid->p_gain, fp_error);  in pid_calc()
228 	pid->integral += fp_error;  in pid_calc()
239 	if (pid->integral > integral_limit)  in pid_calc()
240 		pid->integral = integral_limit;  in pid_calc()
241 	if (pid->integral < -integral_limit)  in pid_calc()
242 		pid->integral = -integral_limit;  in pid_calc()
244 	dterm = mul_fp(pid->d_gain, fp_error - pid->last_err);  in pid_calc()
245 	pid->last_err = fp_error;  in pid_calc()
247 	result = pterm + mul_fp(pid->integral, pid->i_gain) + dterm;  in pid_calc()
254 	pid_p_gain_set(&cpu->pid, pid_params.p_gain_pct);  in intel_pstate_busy_pid_reset()
255 	pid_d_gain_set(&cpu->pid, pid_params.d_gain_pct);  in intel_pstate_busy_pid_reset()
256 	pid_i_gain_set(&cpu->pid, pid_params.i_gain_pct);  in intel_pstate_busy_pid_reset()
258 	pid_reset(&cpu->pid, pid_params.setpoint, 100, pid_params.deadband, 0);  in intel_pstate_busy_pid_reset()
974 	struct _pid *pid;  in intel_pstate_adjust_busy_pstate()  local
981 	pid = &cpu->pid;  in intel_pstate_adjust_busy_pstate()
984 	ctl = pid_calc(pid, busy_scaled);  in intel_pstate_adjust_busy_pstate()