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/*
* Copyright (C) 2020 allwinnertech Ltd.
*/
#include <ffs.h>
#include <log.h>
#include <stddef.h>
#include <sunxi_hal_regulator.h>
#include <sunxi_hal_regulator_private.h>
static int voltage2val(struct regulator_desc *info, int voltage, u8 *reg_val)
{
const struct regulator_linear_range *range;
int i;
if (!info->linear_ranges) {
*reg_val = (voltage - info->min_uv + info->step1_uv - 1)
/ info->step1_uv;
return 0;
}
for (i = 0; i < info->n_linear_ranges; i++) {
int linear_max_uV;
range = &info->linear_ranges[i];
linear_max_uV = range->min_uV +
(range->max_sel - range->min_sel) * range->uV_step;
if (!(voltage <= linear_max_uV && voltage >= range->min_uV))
continue;
/* range->uV_step == 0 means fixed voltage range */
if (range->uV_step == 0) {
*reg_val = 0;
} else {
*reg_val = (voltage - range->min_uV) / range->uV_step;
}
*reg_val += range->min_sel;
return 0;
}
return -1;
}
static int val2voltage(struct regulator_desc *info, u8 reg_val, int *voltage)
{
const struct regulator_linear_range *range = info->linear_ranges;
int i;
if (!info->linear_ranges) {
*voltage = info->min_uv + info->step1_uv * reg_val;
return 0;
}
for (i = 0; i < info->n_linear_ranges; i++, range++) {
if (!(reg_val <= range->max_sel && reg_val >= range->min_sel))
continue;
*voltage = (reg_val - range->min_sel) * range->uV_step +
range->min_uV;
return 0;
}
return -1;
}
static int axp_regulator_set_voltage(struct regulator_dev *rdev, int target_uV)
{
unsigned char id = REGULATOR_ID(rdev->flag);
struct regulator_desc *pd = (struct regulator_desc *)rdev->private;
struct regulator_desc *info = &pd[id];
u8 val;
if (voltage2val(info, target_uV, &val))
return -1;
val <<= ffs(info->vol_mask) - 1;
return hal_axp_byte_update(rdev, info->vol_reg, val, info->vol_mask);
}
static int axp_regulator_get_voltage(struct regulator_dev *rdev, int *vol_uV)
{
unsigned char id = REGULATOR_ID(rdev->flag);
struct regulator_desc *pd = (struct regulator_desc *)rdev->private;
struct regulator_desc *info = &pd[id];
u8 val;
int ret;
ret = hal_axp_byte_read(rdev, info->vol_reg, &val);
if (ret)
return ret;
val &= info->vol_mask;
val >>= ffs(info->vol_mask) - 1;
if (val2voltage(info, val, vol_uV))
return -1;
return 0;
}
static int axp_regulator_enable(struct regulator_dev *rdev)
{
unsigned char id = REGULATOR_ID(rdev->flag);
struct regulator_desc *pd = (struct regulator_desc *)rdev->private;
struct regulator_desc *info = &pd[id];
u8 reg_val = 0;
reg_val = info->enable_val;
if (!reg_val)
reg_val = info->enable_mask;
return hal_axp_byte_update(rdev, info->enable_reg,
reg_val, info->enable_mask);
}
static int axp_regulator_disable(struct regulator_dev *rdev)
{
unsigned char id = REGULATOR_ID(rdev->flag);
struct regulator_desc *pd = (struct regulator_desc *)rdev->private;
struct regulator_desc *info = &pd[id];
u8 reg_val = 0;
reg_val = info->disable_val;
if (!reg_val)
reg_val = ~info->enable_mask;
return hal_axp_byte_update(rdev, info->enable_reg,
reg_val, info->enable_mask);
}
struct regulator_ops axp_regulator_ops = {
.set_voltage = axp_regulator_set_voltage,
.get_voltage = axp_regulator_get_voltage,
.enable = axp_regulator_enable,
.disable = axp_regulator_disable,
};
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