forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

regulator: core: Add helpers for multiple linear ranges

Browse source 
Many regulators have several linear ranges of selector with different
step sizes, for example offering better resolution at lower voltages.
Provide regulator_{map,list}_voltage_linear_range() allowing these
regulators to use generic code. To do so a table of regulator_linear_range
structs needs to be pointed to from the descriptor.

This was inspired by similar code included in a driver submission from
Chao Xie and Yi Zhang at Marvell.

Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Mark Brown 2013-07-02 22:52:41 +01:00
commit 94d33c02c7
2 changed files with 112 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

25
include/linux/regulator/driver.h
View file

@ -39,6 +39,24 @@ enum regulator_status {
REGULATOR_STATUS_UNDEFINED,
};
/**
* Specify a range of voltages for regulator_map_linar_range() and
* regulator_list_linear_range().
*
* @min_uV: Lowest voltage in range
* @max_uV: Highest voltage in range
* @min_sel: Lowest selector for range
* @max_sel: Highest selector for range
* @uV_step: Step size
*/
struct regulator_linear_range {
unsigned int min_uV;
unsigned int max_uV;
unsigned int min_sel;
unsigned int max_sel;
unsigned int uV_step;
};
/**
* struct regulator_ops - regulator operations.
*
@ -223,6 +241,9 @@ struct regulator_desc {
unsigned int linear_min_sel;
unsigned int ramp_delay;
const struct regulator_linear_range *linear_ranges;
int n_linear_ranges;
const unsigned int *volt_table;
unsigned int vsel_reg;
@ -326,10 +347,14 @@ int regulator_mode_to_status(unsigned int);
int regulator_list_voltage_linear(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_table(struct regulator_dev *rdev,
unsigned int selector);
int regulator_map_voltage_linear(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_iterate(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_ascend(struct regulator_dev *rdev,