On 6 July 2015 at 02:20, Marcel Ziswiler <[email protected]> wrote: > From: Marcel Ziswiler <[email protected]> > > 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. > > Signed-off-by: Marcel Ziswiler <[email protected]> > --- > board/toradex/colibri_t20/colibri_t20.c | 35 > +++++++++++++++++++++++++++++++++ > 1 file changed, 35 insertions(+)
Reviewed-by: Simon Glass <[email protected]> You could write a pmic driver for this if you like. _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
