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linux/drivers/regulator/da903x.c
Haojian Zhuang e88267e164 regulator: replace ADTV1 register by ADTV2 in da903x 
In PXA3xx SoC family, V_CORE power doamin is supplied by BUCK1 that is
controller by ADTV1 or ADTV2 register.

By default, v1 and v2 has the same copy. If v1 or v2 is updated, the last
value that is written to either register takes effect. It means that v1
and v2 has different copy. And the actual voltage output is determinated
by last update on either register.

DA9034/35 is binded with PXA3xx SoC family. While SoC is scaling OP or
entering/exiting lower power mode, SoC needs to change voltage of V_CORE
power doamin. In order to be efficient, POWER I2C (hardcode) mode could
be enabled in SoC. In this mode, SoC will control v2 register directly.

In original DA903x driver, software will only read regulator data from v1
register. But SoC controls v2 register directly. It results that v1 and v2
isn't synchronized. Wrong data will be read from v1 register. So access v2
register in da903x driver instead.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2009-09-22 13:32:37 +01:00

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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/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 min_uV;
int max_uV;
int step_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->min_uV || min_uV > info->max_uV)
return -EINVAL;
return 0;
}
/* DA9030/DA9034 common operations */
static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t val, mask;
if (check_range(info, min_uV, max_uV)) {
pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
return -EINVAL;
}
val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
val <<= 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(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;
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 info->min_uV + info->step_uV * 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, &reg_val);
if (ret)
return ret;
return !!(reg_val & (1 << info->enable_bit));
}
/* DA9030 specific operations */
static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da903x_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int ret;
if (check_range(info, min_uV, max_uV)) {
pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
return -EINVAL;
}
val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
val <<= 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_set_ldo14_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da903x_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int thresh;
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->min_uV) / 2;
if (min_uV < thresh) {
val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
val |= 0x4;
} else {
val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
}
val <<= info->vol_shift;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
return da903x_update(da903x_dev, info->vol_reg, val, mask);
}
static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da903x_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int ret;
ret = da903x_read(da903x_dev, info->vol_reg, &val);
if (ret)
return ret;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
val = (val & mask) >> info->vol_shift;
if (val & 0x4)
return info->min_uV + info->step_uV * (3 - (val & ~0x4));
else
return (info->max_uV + info->min_uV) / 2 +
info->step_uV * (val & ~0x4);
}
/* DA9034 specific operations */
static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t val, mask;
int ret;
if (check_range(info, min_uV, max_uV)) {
pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
return -EINVAL;
}
val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
val <<= 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 int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
struct device *da9034_dev = to_da903x_dev(rdev);
uint8_t val, mask;
if (check_range(info, min_uV, max_uV)) {
pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
return -EINVAL;
}
val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
val = (val > 7 || val < 20) ? 8 : val - 12;
val <<= info->vol_shift;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
return da903x_update(da9034_dev, info->vol_reg, val, mask);
}
static int da9034_get_ldo12_voltage(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;
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;
if (val >= 8)
return 2700000 + info->step_uV * (val - 8);
return info->min_uV + info->step_uV * val;
}
static struct regulator_ops da903x_regulator_ldo_ops = {
.set_voltage = da903x_set_ldo_voltage,
.get_voltage = da903x_get_voltage,
.enable = da903x_enable,
.disable = da903x_disable,
.is_enabled = da903x_is_enabled,
};
/* NOTE: this is dedicated for the insane DA9030 LDO14 */
static struct regulator_ops da9030_regulator_ldo14_ops = {
.set_voltage = da9030_set_ldo14_voltage,
.get_voltage = da9030_get_ldo14_voltage,
.enable = da903x_enable,
.disable = da903x_disable,
.is_enabled = da903x_is_enabled,
};
/* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
static struct regulator_ops da9030_regulator_ldo1_15_ops = {
.set_voltage = da9030_set_ldo1_15_voltage,
.get_voltage = da903x_get_voltage,
.enable = da903x_enable,
.disable = da903x_disable,
.is_enabled = da903x_is_enabled,
};
static struct regulator_ops da9034_regulator_dvc_ops = {
.set_voltage = da9034_set_dvc_voltage,
.get_voltage = da903x_get_voltage,
.enable = da903x_enable,
.disable = da903x_disable,
.is_enabled = da903x_is_enabled,
};
/* NOTE: this is dedicated for the insane LDO12 */
static struct regulator_ops da9034_regulator_ldo12_ops = {
.set_voltage = da9034_set_ldo12_voltage,
.get_voltage = da9034_get_ldo12_voltage,
.enable = da903x_enable,
.disable = da903x_disable,
.is_enabled = da903x_is_enabled,
};
#define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
{ \
.desc = { \
.name = "LDO" #_id, \
.ops = &da903x_regulator_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _pmic##_ID_LDO##_id, \
.owner = THIS_MODULE, \
}, \
.min_uV = (min) * 1000, \
.max_uV = (max) * 1000, \
.step_uV = (step) * 1000, \
.vol_reg = _pmic##_##vreg, \
.vol_shift = (shift), \
.vol_nbits = (nbits), \
.enable_reg = _pmic##_##ereg, \
.enable_bit = (ebit), \
}
#define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
{ \
.desc = { \
.name = #_id, \
.ops = &da9034_regulator_dvc_ops, \
.type = REGULATOR_VOLTAGE, \
.id = DA9030_ID_##_id, \
.owner = THIS_MODULE, \
}, \
.min_uV = (min) * 1000, \
.max_uV = (max) * 1000, \
.step_uV = (step) * 1000, \
.vol_reg = DA9030_##vreg, \
.vol_shift = (0), \
.vol_nbits = (nbits), \
.update_reg = DA9030_##ureg, \
.update_bit = (ubit), \
.enable_reg = DA9030_##ereg, \
.enable_bit = (ebit), \
}
#define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
{ \
.desc = { \
.name = #_id, \
.ops = &da9034_regulator_dvc_ops, \
.type = REGULATOR_VOLTAGE, \
.id = DA9034_ID_##_id, \
.owner = THIS_MODULE, \
}, \
.min_uV = (min) * 1000, \
.max_uV = (max) * 1000, \
.step_uV = (step) * 1000, \
.vol_reg = DA9034_##vreg, \
.vol_shift = (0), \
.vol_nbits = (nbits), \
.update_reg = DA9034_##ureg, \
.update_bit = (ubit), \
.enable_reg = DA9034_##ereg, \
.enable_bit = (ebit), \
}
#define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
{ \
.desc = { \
.name = #_id, \
.ops = &da9034_regulator_dvc_ops, \
.type = REGULATOR_VOLTAGE, \
.id = DA9035_ID_##_id, \
.owner = THIS_MODULE, \
}, \
.min_uV = (min) * 1000, \
.max_uV = (max) * 1000, \
.step_uV = (step) * 1000, \
.vol_reg = DA9035_##vreg, \
.vol_shift = (0), \
.vol_nbits = (nbits), \
.update_reg = DA9035_##ureg, \
.update_bit = (ubit), \
.enable_reg = DA9035_##ereg, \
.enable_bit = (ebit), \
}
#define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
#define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
static struct da903x_regulator_info da903x_regulator_info[] = {
/* DA9030 */
DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
/* DA9034 */
DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
/* DA9035 */
DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
};
static inline struct da903x_regulator_info *find_regulator_info(int id)
{
struct da903x_regulator_info *ri;
int i;
for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
ri = &da903x_regulator_info[i];
if (ri->desc.id == id)
return ri;
}
return NULL;
}
static int __devinit da903x_regulator_probe(struct platform_device *pdev)
{
struct da903x_regulator_info *ri = NULL;
struct regulator_dev *rdev;
ri = find_regulator_info(pdev->id);
if (ri == NULL) {
dev_err(&pdev->dev, "invalid regulator ID specified\n");
return -EINVAL;
}
/* Workaround for the weird LDO12 voltage setting */
if (ri->desc.id == DA9034_ID_LDO12)
ri->desc.ops = &da9034_regulator_ldo12_ops;
if (ri->desc.id == DA9030_ID_LDO14)
ri->desc.ops = &da9030_regulator_ldo14_ops;
if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
ri->desc.ops = &da9030_regulator_ldo1_15_ops;
rdev = regulator_register(&ri->desc, &pdev->dev,
pdev->dev.platform_data, ri);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
ri->desc.name);
return PTR_ERR(rdev);
}
platform_set_drvdata(pdev, rdev);
return 0;
}
static int __devexit da903x_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver da903x_regulator_driver = {
.driver = {
.name = "da903x-regulator",
.owner = THIS_MODULE,
},
.probe = da903x_regulator_probe,
.remove = __devexit_p(da903x_regulator_remove),
};
static int __init da903x_regulator_init(void)
{
return platform_driver_register(&da903x_regulator_driver);
}
subsys_initcall(da903x_regulator_init);
static void __exit da903x_regulator_exit(void)
{
platform_driver_unregister(&da903x_regulator_driver);
}
module_exit(da903x_regulator_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
"Mike Rapoport <mike@compulab.co.il>");
MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
MODULE_ALIAS("platform:da903x-regulator");
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