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Date: Wed, 14 Sep 2011 20:54:47 +0200 From: Marcus Folkesson <marcus.folkesson@...il.com> To: linux-kernel@...r.kernel.org, Mark Brown <broonie@...nsource.wolfsonmicro.com> Subject: Regulator constraints and userspace consumer Hello there, I'm currently working with a custom made board based on a OMAP-l138 processor. I've a few questions about the regulator interface. The regulators is registered and loaded correctly with well-defined constraints. I have also registered userspace consumers for each regulator. * One regulator constraint is set to 1000mV as min and max in the boardfile. The default voltage for that regulator is 1125mV (the regulator has this output when powered up). What is the most accurate way to set the voltage for these limitations when the system starts up? There is apparently no check if the default configuration is within limits as the regulator stays on 1125mV. When I'm looking in the userspace consumer (/sys/class/regulator/), the "max_microvolts" and "min_microvolts" is set to 1000000 but the "microvolts" is set to 1125000. * I want to change the output voltage from userspace on demand. What is the most proper way to do this? If I have understand correctly, the userspace consumer just exports interface for switching on/off the regulator, is that correct? Thanks in advance! Med vänliga hälsningar / Best regards Marcus Folkesson -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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