(CNN) The father of superstar DJ Avicii, who died by suicide last year, has urged policymakers to address mental health problems earlier in a person's life, before it becomes too late.

In an interview with CNN, Klas Bergling said his son Tim -- better known by his stage name -- had struggled to keep up with an unrelenting lifestyle and battled stage fright, addiction and depression throughout his career.

"Our theory is not that he planned this suicide -- more that it was like a traffic accident," Bergling told CNN's Robyn Curnow at an event hosted by CNN affiliate Expressen TV. "Many things happened and came into the same station, so to say, and brought him out of his control."

"When he was in a bad situation he always used to call me," Bergling added, speaking at an event in Sweden. "We talked a lot (about) his thoughts about life, his thoughts about meditation, love ... we had long talks, often one hour or so, over the ocean."

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