On Wed, May 4, 2011 at 11:35 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: > On Wed, 4 May 2011, Colin Cross wrote: > >> Imagine a chip where a clock can feed devices A, B, and C. If the >> devices are always clocked at the same rate, and can't gate their >> clocks, the minimum voltage that can be applied to a rail is >> determined ONLY by the rate of the clock. > > That's not so -- although admittedly it's a side issue, and not > particularly related to DVFS. > > For example, the device may have some external I/O lines which need to be > at least some minimum voltage level for the externally-connected device to > function. This minimum voltage level can be unrelated to the device's > clock frequency. True, that was an oversimplificaiton. I meant the minimum voltage that scales with clock frequencies only depends on the clock frequency, not the device. Devices do need to be able to specify a higher minimum voltage, and the regulator api needs to handle it. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
