> -----Original Message----- > From: Mark Brown [mailto:[email protected]] > Sent: Wednesday, February 17, 2010 9:45 PM > To: Nayak, Rajendra > Cc: [email protected]; Liam Girdwood; Samuel Ortiz > Subject: Re: [PATCH 1/2] twl6030: regulator: Fix vsel > calculations in set/get voltage apis > > On Wed, Feb 17, 2010 at 08:54:14PM +0530, Rajendra Nayak wrote: > > > /* use the first in-range value */ > > - if (min_uV <= uV && uV <= max_uV) > > + if (min_uV <= uV && uV <= max_uV) { > > + if (twl_class_is_6030()) > > + /* > > + * Use the below formula to > calculate vsel > > + * mV = 1000mv + 100mv * (vsel - 1) > > + */ > > + vsel = (LDO_MV(mV) - 1000)/100 + 1; > > return twlreg_write(info, > TWL_MODULE_PM_RECEIVER, > > > VREG_VOLTAGE, vsel); > > This looks wrong - this code is inside a loop over vsel->voltage > mappings, if that mapping is wrong and needs to be ignored (which is > what this code is doing) then we shouldn't be looking at it at all.
Mark, Not sure if I understood your comment completely, but here's how I think it will work. The for loop runs through all the valid voltages supported by the regulator and and when it finds the first in-range value programs the VOLTAGE register. For twl4030 the VOLTAGE register can be programmed with just the index of the table since the mapping was something like 1800mV = 0x0 2800mV = 0x1 2900mV = 0x2 3000mV = 0x3 Now for twl6030 I just have added an additional vsel calulation part after the in-range value is found, since using the table index directly as vsel would not work. regards, Rajendra > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
