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authorMarcel Ziswiler <marcel.ziswiler@toradex.com>2014-03-16 12:48:09 +0100
committerMarcel Ziswiler <marcel.ziswiler@toradex.com>2014-03-16 12:48:09 +0100
commitccd521c4681a5850bbec1feec140eeaec33936b0 (patch)
treed3bea22f4cb875c1a15955f0b6a5ea8c72b925e4 /tests
parent0c54b63eb82b048449c05372ecd0e707d6ee32fa (diff)
The Colibri T20's PMIC enters a sleep mode on low supply voltage < 3.0V ±2.5% (2.92...3.08V). Rising the main supply voltage again does not bring it back to regular operation. Not even a full reset does bring the module back. A full power cycle was required to reboot the system. A long positive pulse on the PMICs resume pin also reboots the system but this pin is only accessible as a test point on the module. This patch configures the PMIC through I2C to not enter this sleep mode plus force it to normal state upon sleep request exit should this ever happen.
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