On 20120711-15:44, Mark Brown wrote: > On Wed, Jul 11, 2012 at 09:03:41AM -0500, Rob Herring wrote: > > > I'd expect a single property with freq/volt pairs or 2 properties for > > freq and voltage where there is a 1:1 relationship (freq N uses voltage N). > > I strongly agree - the current proposal is very hard to read due to the > separation between the voltage and frequency values. Some devices do > also need to scale multiple rails together, especially when this gets > used for I/O devices. > > I'd also expect to see a range of voltages for each frequency rather > than a specific voltage; usually things are at least characterised with > a specified tolerance. Not only should we support multiple voltage rails but also multiple clocks. For some devices a DVFS transition is composed of scaling multiple clock rates together. So some sort of clock identifier (phandle?) is needed as well. (forgive my ignorance on the phandle part, as I am a DT noob) Regards, Mike -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
