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Operating Systems OS X (Apple) The Alternate DC board for AudioScope.sh. Post 302947893 by wisecracker on Tuesday 23rd of June 2015 02:50:11 PM
Old 06-23-2015
Hi C'688...

I can't as the real values will eventually be determined by trial and error on the initial build and calibration phases. the V to F relationship is none linear and will range from about 700Hz to 2800Hz; (anywhere in that region depending on the voltage).
As I have pointed out the longhand method works but it is not a lookup table and looks mighty ugly...
Each of the 16 possible values will have its own frequency range as its lookup.
 

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STRUCT 
REGULATOR_DES(9) API reference STRUCT REGULATOR_DES(9) NAME
struct_regulator_desc - Static regulator descriptor SYNOPSIS
struct regulator_desc { const char * name; const char * supply_name; int id; bool continuous_voltage_range; unsigned n_voltages; struct regulator_ops * ops; int irq; enum regulator_type type; struct module * owner; unsigned int min_uV; unsigned int uV_step; unsigned int linear_min_sel; unsigned int ramp_delay; const unsigned int * volt_table; unsigned int vsel_reg; unsigned int vsel_mask; unsigned int apply_reg; unsigned int apply_bit; unsigned int enable_reg; unsigned int enable_mask; bool enable_is_inverted; unsigned int bypass_reg; unsigned int bypass_mask; unsigned int enable_time; }; MEMBERS
name Identifying name for the regulator. supply_name Identifying the regulator supply id Numerical identifier for the regulator. continuous_voltage_range Indicates if the regulator can set any voltage within constrains range. n_voltages Number of selectors available for ops.list_voltage. ops Regulator operations table. irq Interrupt number for the regulator. type Indicates if the regulator is a voltage or current regulator. owner Module providing the regulator, used for refcounting. min_uV Voltage given by the lowest selector (if linear mapping) uV_step Voltage increase with each selector (if linear mapping) linear_min_sel Minimal selector for starting linear mapping ramp_delay Time to settle down after voltage change (unit: uV/us) volt_table Voltage mapping table (if table based mapping) vsel_reg Register for selector when using regulator_regmap_X_voltage_ vsel_mask Mask for register bitfield used for selector apply_reg Register for initiate voltage change on the output when using regulator_set_voltage_sel_regmap apply_bit Register bitfield used for initiate voltage change on the output when using regulator_set_voltage_sel_regmap enable_reg Register for control when using regmap enable/disable ops enable_mask Mask for control when using regmap enable/disable ops enable_is_inverted A flag to indicate set enable_mask bits to disable when using regulator_enable_regmap and friends APIs. bypass_reg Register for control when using regmap set_bypass bypass_mask Mask for control when using regmap set_bypass enable_time Time taken for initial enable of regulator (in uS). DESCRIPTION
Each regulator registered with the core is described with a structure of this type and a struct regulator_config. This structure contains the non-varying parts of the regulator description. AUTHORS
Liam Girdwood <lrg@slimlogic.co.uk> Author. Mark Brown <broonie@opensource.wolfsonmicro.com> Wolfson Microelectronics, Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT REGULATOR_DES(9)
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