/**
* 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;
}
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;
}