Exemplo n.º 1
0
/**
 * partition_enable_opps() - disable all opps above a given state
 * @dfc:	Pointer to devfreq we are operating on
 * @cdev_state:	cooling device state we're setting
 *
 * Go through the OPPs of the device, enabling all OPPs until
 * @cdev_state and disabling those frequencies above it.
 */
static int partition_enable_opps(struct devfreq_cooling_device *dfc,
				 unsigned long cdev_state)
{
	int i;
	struct device *dev = dfc->devfreq->dev.parent;

	for (i = 0; i < dfc->freq_table_size; i++) {
		struct dev_pm_opp *opp;
		int ret = 0;
		unsigned int freq = dfc->freq_table[i];
		bool want_enable = i >= cdev_state ? true : false;

		opp = dev_pm_opp_find_freq_exact(dev, freq, !want_enable);

		if (PTR_ERR(opp) == -ERANGE)
			continue;
		else if (IS_ERR(opp))
			return PTR_ERR(opp);

		dev_pm_opp_put(opp);

		if (want_enable)
			ret = dev_pm_opp_enable(dev, freq);
		else
			ret = dev_pm_opp_disable(dev, freq);

		if (ret)
			return ret;
	}

	return 0;
}
Exemplo n.º 2
0
static int __init beagle_opp_init(void)
{
	int r = 0;

	if (!machine_is_omap3_beagle())
		return 0;

	/* Initialize the omap3 opp table if not already created. */
	r = omap3_opp_init();
	if (r < 0 && (r != -EEXIST)) {
		pr_err("%s: opp default init failed\n", __func__);
		return r;
	}

	/* Custom OPP enabled for all xM versions */
	if (cpu_is_omap3630()) {
		struct device *mpu_dev, *iva_dev;

		mpu_dev = get_cpu_device(0);
		iva_dev = omap_device_get_by_hwmod_name("iva");

		if (!mpu_dev || IS_ERR(iva_dev)) {
			pr_err("%s: Aiee.. no mpu/dsp devices? %p %p\n",
				__func__, mpu_dev, iva_dev);
			return -ENODEV;
		}
		/* Enable MPU 1GHz and lower opps */
		r = dev_pm_opp_enable(mpu_dev, 800000000);
		/* TODO: MPU 1GHz needs SR and ABB */

		/* Enable IVA 800MHz and lower opps */
		r |= dev_pm_opp_enable(iva_dev, 660000000);
		/* TODO: DSP 800MHz needs SR and ABB */
		if (r) {
			pr_err("%s: failed to enable higher opp %d\n",
				__func__, r);
			/*
			 * Cleanup - disable the higher freqs - we dont care
			 * about the results
			 */
			dev_pm_opp_disable(mpu_dev, 800000000);
			dev_pm_opp_disable(iva_dev, 660000000);
		}
	}
	return 0;
}