On 11/11/2018 09:15 PM, J, KEERTHY wrote: > > > On 11/8/2018 11:24 AM, Viresh Kumar wrote: >> On 07-11-18, 10:04, Keerthy wrote: >>> The voltage range (min, max) provided in the device tree is from >>> the data manual and is pretty big, catering to a wide range of devices. >>> On a i2c read/write failure the regulator_set_voltage_triplet function >>> falls back to set voltage between min and max. The min value from Device >>> Tree can be lesser than the optimal value and in that case that can lead >>> to a hang or crash. Hence set the u_volt_min dynamically to the optimal >>> voltage value. >> >> And why shouldn't we fix the DT for this ? > > The DT voltages do not cater to the broad range of devices. In some > particular cases the DT min voltage is slightly lower the voltage at > which the device cannot sustain a particular frequency in which case the > device just silently hangs. So best thing to do is to actually read the > device specific voltages dynamically which will guarantee a particular > device sustaining a particular frequency at the optimal voltage. >
Acked-by: Dave Gerlach <d-gerl...@ti.com> >>
