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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Configuration</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Voltage and current regulator API" /><link rel="up" href="ch02.html" title="Chapter 2. Consumer driver interface" /><link rel="prev" href="ch02.html" title="Chapter 2. Consumer driver interface" /><link rel="next" href="ch02s03.html" title="Callbacks" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Configuration</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch02.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Consumer driver interface</th><td width="20%" align="right"> <a accesskey="n" href="ch02s03.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Configuration"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="consumer-config"></a>Configuration</h2></div></div></div><p>
Some consumer devices may need to be able to dynamically
configure their supplies. For example, MMC drivers may need to
select the correct operating voltage for their cards. This may
be done while the regulator is enabled or disabled.
</p><p>
The <code class="function"><a class="link" href="re17.html" title="regulator_set_voltage">regulator_set_voltage</a>
</code> and <code class="function"><a class="link" href="re19.html" title="regulator_set_current_limit">regulator_set_current_limit</a>
</code> functions provide the primary interface for this.
Both take ranges of voltages and currents, supporting drivers
that do not require a specific value (eg, CPU frequency scaling
normally permits the CPU to use a wider range of supply
voltages at lower frequencies but does not require that the
supply voltage be lowered). Where an exact value is required
both minimum and maximum values should be identical.
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