On Thu, Jun 23, 2011 at 05:15:52AM -0400, Vivek Bardia wrote: > On 22 June 2011 15:12, Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> wrote: > > > > On Wed, Jun 22, 2011 at 04:45:14AM -0400, Vivek Bardia wrote: > > > Hi Guenter, > > > > > > sorry for the delayed reply from my end. > > > > > > Right now I am under the constraint where I cannot share the datasheet. But > > > yes, the datasheet is going be out very soon. I shall update u about the same > > > > > > Can the pmbus driver be used to set output voltage from another driver in the > > > kernel space itself. what I understood about the pmbus driver is that it is > > > meant for monitoring and controlling. at my end if the monitoring is being done > > > by another entity(voltage regulator) and the controlling only needs to be done > > > by the PMIC then how do I go about? say I just want to use VOUT_TRIM command. > > > > > At least right now that is not supported. The current driver only supports hwmon > > functionality, ie pure monitoring; control is not implemented. A clean implementation > > for control would probably require a rewrite with a generic part (probably in mfd), > > control (probably in regulator) and monitoring (in hwmon). > > But you do have pmbus_write_byte/pmbus_write_word_data calls. They are > only not exported right? > or is it that if these calls are made, it wont work the way it should > Those are of no benefit outside the driver. > > Note that you can not have an I2C slave chip controlled by multiple entities. > > If you wrote or have a regulator driver, it has control over the chip, and hwmon access > > to it will not be possible. > > what if I simply do not need any monitoring capabilities. I just want > to enable the device(OPERATION), read the output voltage(READ_VOUT) > and then based on an external custom sensor set the output > voltage(VOUT_TRIM), once done disable the device. > Not sure what value that has, since you disable the device afterwards anyway ... guess I don't have to know ;). You can write the registers directly using i2c function calls, i2c_smbus_write_byte() and i2c_smbus_write_word_data(). If your chip has a page command, just set the page first. Thanks, Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
