Пример #1
0
/**
 * sr_class1p5_voltdm_recal() - Helper routine to reset calibration.
 * @voltdm:	Voltage domain to reset calibration for
 * @user:	unused
 *
 * NOTE: Appropriate locks must be held by calling path to ensure mutual
 * exclusivity
 */
static int sr_class1p5_voltdm_recal(struct voltagedomain *voltdm,
		void *user)
{
	struct omap_volt_data *vdata;

	/*
	 * we need to go no further if sr is not enabled for this domain or
	 * voltage processor is not present for this voltage domain
	 * (example vdd_wakeup). Class 1.5 requires Voltage processor
	 * to function.
	 */
	if (!voltdm->vp || !is_sr_enabled(voltdm))
		return 0;

	vdata = omap_voltage_get_curr_vdata(voltdm);
	if (!vdata) {
		pr_err("%s: unable to find current voltage for vdd_%s\n",
			__func__, voltdm->name);
		return -ENXIO;
	}

	omap_sr_disable(voltdm);
	omap_voltage_calib_reset(voltdm);
	voltdm_reset(voltdm);
	omap_sr_enable(voltdm, vdata);
	pr_info("%s: %s: calibration reset\n", __func__, voltdm->name);

	return 0;
}
/**
 * sr_class1p5_reset_calib() - reset all calibrated voltages
 * @voltdm:	configure for which voltage domain
 * @reset:	reset voltage before we recal?
 * @recal:	should I recalibrate my current opp?
 *
 * if we call this, it means either periodic calibration trigger was
 * fired(either from sysfs or other mechanisms) or we have disabled class 1p5,
 * meaning we cant trust the calib voltages anymore, it is better to use
 * nominal in the system
 */
static void sr_class1p5_reset_calib(struct voltagedomain *voltdm, bool reset,
				    bool recal)
{
	struct sr_class1p5_work_data *work_data;

	/* I dont need to go further if sr is not present */
	if (!is_sr_enabled(voltdm))
		return;

	work_data = get_sr1p5_work(voltdm);

	if (work_data->work_active)
		sr_class1p5_disable(voltdm, work_data->vdata, 0);

	omap_voltage_calib_reset(voltdm);

	/*
	 * I should now reset the voltages to my nominal to be safe
	 */
	if (reset)
		omap_voltage_reset(voltdm);

	/*
	 * I should fire a recalibration for current opp if needed
	 * Note: i have just reset my calibrated voltages, and if
	 * i call sr_enable equivalent, I will cause a recalibration
	 * loop, even though the function is called sr_enable.. we
	 * are in class 1.5 ;)
	 */
	if (reset && recal)
		sr_class1p5_enable(voltdm, work_data->vdata);
}
Пример #3
0
/**
 * sr_classp5_deinit() - class p5 deinitialization
 * @sr:		SR to deinit
 * @class_priv_data: class private data for deinitialiation (unused)
 *
 * currently only resets the calibrated voltage forcing DVFS voltages
 * to be used in the system
 *
 * NOTE: Appropriate locks must be held by calling path to ensure mutual
 * exclusivity
 */
static int sr_classp5_deinit(struct omap_sr *sr, void *class_priv_data)
{
	struct voltagedomain *voltdm = NULL;
	void **voltdm_cdata = NULL;
	struct sr_classp5_calib_data *work_data = NULL;

	if (IS_ERR_OR_NULL(sr) || IS_ERR_OR_NULL(sr->voltdm)) {
		pr_err("%s: bad parameters!\n", __func__);
		return -EINVAL;
	}

	voltdm = sr->voltdm;
	voltdm_cdata = &sr->voltdm_cdata;

	if (IS_ERR_OR_NULL(*voltdm_cdata)) {
		pr_err("%s: ooopps.. class not initialized for %s! bug??\n",
		       __func__, voltdm->name);
		return -EINVAL;
	}
	work_data = (struct sr_classp5_calib_data *)*voltdm_cdata;

	/*
	 * we dont have SR periodic calib anymore.. so reset calibs
	 * we are already protected by appropriate locks, so no lock needed
	 * here.
	 */
	if (work_data->work_active)
		sr_classp5_disable(sr, 0);

	/* Ensure worker canceled. */
	cancel_delayed_work_sync(&work_data->work);
	omap_voltage_calib_reset(voltdm);
	voltdm_reset(voltdm);
	pm_qos_remove_request(&work_data->qos);

	kfree(work_data);
	*voltdm_cdata = NULL;

	return 0;
}