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|
/*
* Regulators driver for Dialog Semiconductor DA903x
*
* Copyright (C) 2006-2008 Marvell International Ltd.
* Copyright (C) 2008 Compulab Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/da903x.h>
/* DA9030 Registers */
#define DA9030_INVAL (-1)
#define DA9030_LDO1011 (0x10)
#define DA9030_LDO15 (0x11)
#define DA9030_LDO1416 (0x12)
#define DA9030_LDO1819 (0x13)
#define DA9030_LDO17 (0x14)
#define DA9030_BUCK2DVM1 (0x15)
#define DA9030_BUCK2DVM2 (0x16)
#define DA9030_RCTL11 (0x17)
#define DA9030_RCTL21 (0x18)
#define DA9030_LDO1 (0x90)
#define DA9030_LDO23 (0x91)
#define DA9030_LDO45 (0x92)
#define DA9030_LDO6 (0x93)
#define DA9030_LDO78 (0x94)
#define DA9030_LDO912 (0x95)
#define DA9030_BUCK (0x96)
#define DA9030_RCTL12 (0x97)
#define DA9030_RCTL22 (0x98)
#define DA9030_LDO_UNLOCK (0xa0)
#define DA9030_LDO_UNLOCK_MASK (0xe0)
#define DA9034_OVER1 (0x10)
/* DA9034 Registers */
#define DA9034_INVAL (-1)
#define DA9034_OVER2 (0x11)
#define DA9034_OVER3 (0x12)
#define DA9034_LDO643 (0x13)
#define DA9034_LDO987 (0x14)
#define DA9034_LDO1110 (0x15)
#define DA9034_LDO1312 (0x16)
#define DA9034_LDO1514 (0x17)
#define DA9034_VCC1 (0x20)
#define DA9034_ADTV1 (0x23)
#define DA9034_ADTV2 (0x24)
#define DA9034_AVRC (0x25)
#define DA9034_CDTV1 (0x26)
#define DA9034_CDTV2 (0x27)
#define DA9034_CVRC (0x28)
#define DA9034_SDTV1 (0x29)
#define DA9034_SDTV2 (0x2a)
#define DA9034_SVRC (0x2b)
#define DA9034_MDTV1 (0x32)
#define DA9034_MDTV2 (0x33)
#define DA9034_MVRC (0x34)
/* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
#define DA9035_OVER3 (0x12)
#define DA9035_VCC2 (0x1f)
#define DA9035_3DTV1 (0x2c)
#define DA9035_3DTV2 (0x2d)
#define DA9035_3VRC (0x2e)
#define DA9035_AUTOSKIP (0x2f)
struct da903x_regulator_info {
struct regulator_desc desc;
int max_uV;
int vol_reg;
int vol_shift;
int vol_nbits;
int update_reg;
int update_bit;
int enable_reg;
int enable_bit;
};
static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
{
return rdev_get_dev(rdev)->parent->parent;
}
static inline int check_range(struct da903x_regulator_info *info,
int min_uV, int max_uV)
{
if (min_uV < info->desc.min_uV || min_uV > info->max_uV)
return -EINVAL;
return 0;
}
/* DA9030/DA9034 common operations */
static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t val, mask;
if (rdev->desc->n_voltages == 1)
return -EINVAL;
val = selector << info->vol_shift;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
return da903x_update(da9034_dev, info->vol_reg, val, mask);
}
static int da903x_get_voltage_sel(struct regulator_dev *rdev)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int ret;
if (rdev->desc->n_voltages == 1)
return 0;
ret = da903x_read(da9034_dev, info->vol_reg, &val);
if (ret)
return ret;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
val = (val & mask) >> info->vol_shift;
return val;
}
static int da903x_enable(struct regulator_dev *rdev)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
return da903x_set_bits(da9034_dev, info->enable_reg,
1 << info->enable_bit);
}
static int da903x_disable(struct regulator_dev *rdev)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
return da903x_clr_bits(da9034_dev, info->enable_reg,
1 << info->enable_bit);
}
static int da903x_is_enabled(struct regulator_dev *rdev)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t reg_val;
int ret;
ret = da903x_read(da9034_dev, info->enable_reg, ®_val);
if (ret)
return ret;
return !!(reg_val & (1 << info->enable_bit));
}
/* DA9030 specific operations */
static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da903x_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int ret;
val = selector << info->vol_shift;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
mask |= DA9030_LDO_UNLOCK_MASK;
/* write twice */
ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
if (ret)
return ret;
return da903x_update(da903x_dev, info->vol_reg, val, mask);
}
static int da9030_map_ldo14_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
int thresh, sel;
if (check_range(info, min_uV, max_uV)) {
pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
return -EINVAL;
}
thresh = (info->max_uV + info->desc.min_uV) / 2;
if (min_uV < thresh) {
sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
sel |= 0x4;
} else {
sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
}
return sel;
}
static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
unsigned selector)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
int volt;
if (selector & 0x4)
volt = rdev->desc->min_uV +
rdev->desc->uV_step * (3 - (selector & ~0x4));
else
volt = (info->max_uV + rdev->desc->min_uV) / 2 +
rdev->desc->uV_step * (selector & ~0x4);
if (volt > info->max_uV)
return -EINVAL;
return volt;
}
/* DA9034 specific operations */
static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int ret;
val = selector << info->vol_shift;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
if (ret)
return ret;
ret = da903x_set_bits(da9034_dev, info->update_reg,
1 << info->update_bit);
return ret;
}
static const struct regulator_linear_range da9034_ldo12_ranges[] =
|