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authorPhilipp Zabel <philipp.zabel@gmail.com>2009-05-28 21:00:03 +0200
committerLiam Girdwood <lrg@slimlogic.co.uk>2009-06-15 12:18:27 +0200
commitc8f1e5025ca2fa8e6e037451f3d271e66745a19b (patch)
tree22d0cc384cee47f639163daa15a1d6dff91da1b4 /arch/powerpc/include/asm/checksum.h
parentregulator/max1586: support increased V3 voltage range (diff)
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regulator/max1586: fix V3 gain calculation integer overflow
On Thu, May 28, 2009 at 10:59 AM, Mark Brown <broonie@opensource.wolfsonmicro.com> wrote: > On Thu, May 28, 2009 at 07:15:16AM +0200, Philipp Zabel wrote: >> The V3 regulator can be configured with an external resistor >> connected to the feedback pin (R24 in the data sheet) to >> increase the voltage range. >> >> For example, hx4700 has R24 = 3.32 kOhm to achieve a maximum >> V3 voltage of 1.55 V which is needed for 624 MHz CPU frequency. >> >> Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> > > Looks good. > > Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Thanks, but it turns out I hit a 32 bit integer overflow in the gain calculation. I'd like to mend that with the following patch. Now max_uV could be increased up to 4.294 V, enough to charge LiPo cells. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'arch/powerpc/include/asm/checksum.h')
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