Hi Tomasz, On Fri, Feb 14, 2014 at 9:17 PM, Tomasz Figa <t.figa@xxxxxxxxxxx> wrote: mistakenly didn't do "Reply All", so sending it again. > Hi Vivek, > > > On 14.02.2014 14:53, Vivek Gautam wrote: >>>> >>>> Changes from v2: >>>> 1) Added support for multiple PHYs (UTMI+ and PIPE3) and >>>> related changes in the driver structuring. >>> >>> >>> >>> I'm a bit skeptical about this separation. Can the PHY operate with just >>> the >>> UTMI+ or PIPE3 part enabled alone without the other? Can any PHY consumer >>> operate this way? >> >> >> Yes :-) >> As also pointed by Kishon the PHY consumer (which is DWC3 in case of >> Exynos5 SoC series) >> should theoretically be able use either UTMI+ phy for High speed >> operations or both (UTMI+ and PIPE3) >> for Super Speed operations. > > > OK, that's fine then. This is the explanation I needed, thanks. > > >>> >>> I believe the right thing to do here is to do all the initialization in >>> .power_on() and let the driver simply call phy_power_on() when it needs >>> the >>> PHY and phy_power_off() otherwise. >> >> >> If this is what we should be doing then what will be the purpose of >> two separate APIs : >> phy_power_on() and phy_init(). >> Am i missing while understanding the things. >> > > I don't understand this separation as well. Operations that should be done > together shouldn't be separated. Is there any case when you can call one of > phy_power_on() and phy_init() without calling another one right before/after > it? Most of the PHY consumers need to call phy_power_on() as well as phy_init() to get PHY working (if the PHY provider gives callback to both). I think the idea would have been to separate out the initialization related and power related jobs (which may include setting up the PMUs and may be regulators ?) But, i think it's true, if the PHY provider callback for both phy_power_on() and phy_init() then the consumer __has__ to call both to get things working. -- Best Regards Vivek Gautam Samsung R&D Institute, Bangalore India -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
