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linux-next/drivers/regulator/ab8500.c
Linus Walleij 42ab616afe regulator: add ab8500 enable and raise time delays 
This uses the new infrastructure to provide proper delays when
enabling or setting the voltage of one specific regulator.

Cc: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-03-26 14:15:06 +00:00

892 lines
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/*
* Copyright (C) ST-Ericsson SA 2010
*
* License Terms: GNU General Public License v2
*
* Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
* Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
*
* AB8500 peripheral regulators
*
* AB8500 supports the following regulators:
* VAUX1/2/3, VINTCORE, VTVOUT, VUSB, VAUDIO, VAMIC1/2, VDMIC, VANA
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/ab8500.h>
#include <linux/mfd/abx500.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/ab8500.h>
/**
* struct ab8500_regulator_info - ab8500 regulator information
* @dev: device pointer
* @desc: regulator description
* @regulator_dev: regulator device
* @max_uV: maximum voltage (for variable voltage supplies)
* @min_uV: minimum voltage (for variable voltage supplies)
* @fixed_uV: typical voltage (for fixed voltage supplies)
* @update_bank: bank to control on/off
* @update_reg: register to control on/off
* @update_mask: mask to enable/disable regulator
* @update_val_enable: bits to enable the regulator in normal (high power) mode
* @voltage_bank: bank to control regulator voltage
* @voltage_reg: register to control regulator voltage
* @voltage_mask: mask to control regulator voltage
* @voltages: supported voltage table
* @voltages_len: number of supported voltages for the regulator
* @delay: startup/set voltage delay in us
*/
struct ab8500_regulator_info {
struct device *dev;
struct regulator_desc desc;
struct regulator_dev *regulator;
int max_uV;
int min_uV;
int fixed_uV;
u8 update_bank;
u8 update_reg;
u8 update_mask;
u8 update_val_enable;
u8 voltage_bank;
u8 voltage_reg;
u8 voltage_mask;
int const *voltages;
int voltages_len;
unsigned int delay;
};
/* voltage tables for the vauxn/vintcore supplies */
static const int ldo_vauxn_voltages[] = {
1100000,
1200000,
1300000,
1400000,
1500000,
1800000,
1850000,
1900000,
2500000,
2650000,
2700000,
2750000,
2800000,
2900000,
3000000,
3300000,
};
static const int ldo_vaux3_voltages[] = {
1200000,
1500000,
1800000,
2100000,
2500000,
2750000,
2790000,
2910000,
};
static const int ldo_vintcore_voltages[] = {
1200000,
1225000,
1250000,
1275000,
1300000,
1325000,
1350000,
};
static int ab8500_regulator_enable(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->update_bank, info->update_reg,
info->update_mask, info->update_val_enable);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set enable bits for regulator\n");
dev_vdbg(rdev_get_dev(rdev),
"%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, info->update_val_enable);
return ret;
}
static int ab8500_regulator_disable(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->update_bank, info->update_reg,
info->update_mask, 0x0);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set disable bits for regulator\n");
dev_vdbg(rdev_get_dev(rdev),
"%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, 0x0);
return ret;
}
static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_get_register_interruptible(info->dev,
info->update_bank, info->update_reg, &regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't read 0x%x register\n", info->update_reg);
return ret;
}
dev_vdbg(rdev_get_dev(rdev),
"%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, regval);
if (regval & info->update_mask)
return true;
else
return false;
}
static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
/* return the uV for the fixed regulators */
if (info->fixed_uV)
return info->fixed_uV;
if (selector >= info->voltages_len)
return -EINVAL;
return info->voltages[selector];
}
static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
{
int ret, val;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_get_register_interruptible(info->dev,
info->voltage_bank, info->voltage_reg, &regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't read voltage reg for regulator\n");
return ret;
}
dev_vdbg(rdev_get_dev(rdev),
"%s-get_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->voltage_bank, info->voltage_reg,
info->voltage_mask, regval);
/* vintcore has a different layout */
val = regval & info->voltage_mask;
if (info->desc.id == AB8500_LDO_INTCORE)
ret = info->voltages[val >> 0x3];
else
ret = info->voltages[val];
return ret;
}
static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
int i;
/* check the supported voltage */
for (i = 0; i < info->voltages_len; i++) {
if ((info->voltages[i] >= min_uV) &&
(info->voltages[i] <= max_uV))
return i;
}
return -EINVAL;
}
static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
/* get the appropriate voltages within the range */
ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't get best voltage for regulator\n");
return ret;
}
*selector = ret;
/* set the registers for the request */
regval = (u8)ret;
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->voltage_bank, info->voltage_reg,
info->voltage_mask, regval);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set voltage reg for regulator\n");
dev_vdbg(rdev_get_dev(rdev),
"%s-set_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->voltage_bank, info->voltage_reg,
info->voltage_mask, regval);
return ret;
}
static int ab8500_regulator_enable_time(struct regulator_dev *rdev)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
return info->delay;
}
static int ab8500_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_sel,
unsigned int new_sel)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
int ret;
/* If the regulator isn't on, it won't take time here */
ret = ab8500_regulator_is_enabled(rdev);
if (ret < 0)
return ret;
if (!ret)
return 0;
return info->delay;
}
static struct regulator_ops ab8500_regulator_ops = {
.enable = ab8500_regulator_enable,
.disable = ab8500_regulator_disable,
.is_enabled = ab8500_regulator_is_enabled,
.get_voltage = ab8500_regulator_get_voltage,
.set_voltage = ab8500_regulator_set_voltage,
.list_voltage = ab8500_list_voltage,
.enable_time = ab8500_regulator_enable_time,
.set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
};
static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
return info->fixed_uV;
}
static struct regulator_ops ab8500_regulator_fixed_ops = {
.enable = ab8500_regulator_enable,
.disable = ab8500_regulator_disable,
.is_enabled = ab8500_regulator_is_enabled,
.get_voltage = ab8500_fixed_get_voltage,
.list_voltage = ab8500_list_voltage,
.enable_time = ab8500_regulator_enable_time,
.set_voltage_time_sel = ab8500_regulator_set_voltage_time_sel,
};
static struct ab8500_regulator_info
ab8500_regulator_info[AB8500_NUM_REGULATORS] = {
/*
* Variable Voltage Regulators
* name, min mV, max mV,
* update bank, reg, mask, enable val
* volt bank, reg, mask, table, table length
*/
[AB8500_LDO_AUX1] = {
.desc = {
.name = "LDO-AUX1",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX1,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x04,
.update_reg = 0x09,
.update_mask = 0x03,
.update_val_enable = 0x01,
.voltage_bank = 0x04,
.voltage_reg = 0x1f,
.voltage_mask = 0x0f,
.voltages = ldo_vauxn_voltages,
.voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
},
[AB8500_LDO_AUX2] = {
.desc = {
.name = "LDO-AUX2",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX2,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x04,
.update_reg = 0x09,
.update_mask = 0x0c,
.update_val_enable = 0x04,
.voltage_bank = 0x04,
.voltage_reg = 0x20,
.voltage_mask = 0x0f,
.voltages = ldo_vauxn_voltages,
.voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
},
[AB8500_LDO_AUX3] = {
.desc = {
.name = "LDO-AUX3",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX3,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vaux3_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x04,
.update_reg = 0x0a,
.update_mask = 0x03,
.update_val_enable = 0x01,
.voltage_bank = 0x04,
.voltage_reg = 0x21,
.voltage_mask = 0x07,
.voltages = ldo_vaux3_voltages,
.voltages_len = ARRAY_SIZE(ldo_vaux3_voltages),
},
[AB8500_LDO_INTCORE] = {
.desc = {
.name = "LDO-INTCORE",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_INTCORE,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vintcore_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x03,
.update_reg = 0x80,
.update_mask = 0x44,
.update_val_enable = 0x04,
.voltage_bank = 0x03,
.voltage_reg = 0x80,
.voltage_mask = 0x38,
.voltages = ldo_vintcore_voltages,
.voltages_len = ARRAY_SIZE(ldo_vintcore_voltages),
},
/*
* Fixed Voltage Regulators
* name, fixed mV,
* update bank, reg, mask, enable val
*/
[AB8500_LDO_TVOUT] = {
.desc = {
.name = "LDO-TVOUT",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_TVOUT,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.delay = 10000,
.fixed_uV = 2000000,
.update_bank = 0x03,
.update_reg = 0x80,
.update_mask = 0x82,
.update_val_enable = 0x02,
},
[AB8500_LDO_USB] = {
.desc = {
.name = "LDO-USB",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_USB,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 3300000,
.update_bank = 0x03,
.update_reg = 0x82,
.update_mask = 0x03,
.update_val_enable = 0x01,
},
[AB8500_LDO_AUDIO] = {
.desc = {
.name = "LDO-AUDIO",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUDIO,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2000000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x02,
.update_val_enable = 0x02,
},
[AB8500_LDO_ANAMIC1] = {
.desc = {
.name = "LDO-ANAMIC1",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANAMIC1,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2050000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x08,
.update_val_enable = 0x08,
},
[AB8500_LDO_ANAMIC2] = {
.desc = {
.name = "LDO-ANAMIC2",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANAMIC2,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2050000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x10,
.update_val_enable = 0x10,
},
[AB8500_LDO_DMIC] = {
.desc = {
.name = "LDO-DMIC",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_DMIC,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 1800000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x04,
.update_val_enable = 0x04,
},
[AB8500_LDO_ANA] = {
.desc = {
.name = "LDO-ANA",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANA,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 1200000,
.update_bank = 0x04,
.update_reg = 0x06,
.update_mask = 0x0c,
.update_val_enable = 0x04,
},
};
struct ab8500_reg_init {
u8 bank;
u8 addr;
u8 mask;
};
#define REG_INIT(_id, _bank, _addr, _mask) \
[_id] = { \
.bank = _bank, \
.addr = _addr, \
.mask = _mask, \
}
static struct ab8500_reg_init ab8500_reg_init[] = {
/*
* 0x30, VanaRequestCtrl
* 0x0C, VpllRequestCtrl
* 0xc0, VextSupply1RequestCtrl
*/
REG_INIT(AB8500_REGUREQUESTCTRL2, 0x03, 0x04, 0xfc),
/*
* 0x03, VextSupply2RequestCtrl
* 0x0c, VextSupply3RequestCtrl
* 0x30, Vaux1RequestCtrl
* 0xc0, Vaux2RequestCtrl
*/
REG_INIT(AB8500_REGUREQUESTCTRL3, 0x03, 0x05, 0xff),
/*
* 0x03, Vaux3RequestCtrl
* 0x04, SwHPReq
*/
REG_INIT(AB8500_REGUREQUESTCTRL4, 0x03, 0x06, 0x07),
/*
* 0x08, VanaSysClkReq1HPValid
* 0x20, Vaux1SysClkReq1HPValid
* 0x40, Vaux2SysClkReq1HPValid
* 0x80, Vaux3SysClkReq1HPValid
*/
REG_INIT(AB8500_REGUSYSCLKREQ1HPVALID1, 0x03, 0x07, 0xe8),
/*
* 0x10, VextSupply1SysClkReq1HPValid
* 0x20, VextSupply2SysClkReq1HPValid
* 0x40, VextSupply3SysClkReq1HPValid
*/
REG_INIT(AB8500_REGUSYSCLKREQ1HPVALID2, 0x03, 0x08, 0x70),
/*
* 0x08, VanaHwHPReq1Valid
* 0x20, Vaux1HwHPReq1Valid
* 0x40, Vaux2HwHPReq1Valid
* 0x80, Vaux3HwHPReq1Valid
*/
REG_INIT(AB8500_REGUHWHPREQ1VALID1, 0x03, 0x09, 0xe8),
/*
* 0x01, VextSupply1HwHPReq1Valid
* 0x02, VextSupply2HwHPReq1Valid
* 0x04, VextSupply3HwHPReq1Valid
*/
REG_INIT(AB8500_REGUHWHPREQ1VALID2, 0x03, 0x0a, 0x07),
/*
* 0x08, VanaHwHPReq2Valid
* 0x20, Vaux1HwHPReq2Valid
* 0x40, Vaux2HwHPReq2Valid
* 0x80, Vaux3HwHPReq2Valid
*/
REG_INIT(AB8500_REGUHWHPREQ2VALID1, 0x03, 0x0b, 0xe8),
/*
* 0x01, VextSupply1HwHPReq2Valid
* 0x02, VextSupply2HwHPReq2Valid
* 0x04, VextSupply3HwHPReq2Valid
*/
REG_INIT(AB8500_REGUHWHPREQ2VALID2, 0x03, 0x0c, 0x07),
/*
* 0x20, VanaSwHPReqValid
* 0x80, Vaux1SwHPReqValid
*/
REG_INIT(AB8500_REGUSWHPREQVALID1, 0x03, 0x0d, 0xa0),
/*
* 0x01, Vaux2SwHPReqValid
* 0x02, Vaux3SwHPReqValid
* 0x04, VextSupply1SwHPReqValid
* 0x08, VextSupply2SwHPReqValid
* 0x10, VextSupply3SwHPReqValid
*/
REG_INIT(AB8500_REGUSWHPREQVALID2, 0x03, 0x0e, 0x1f),
/*
* 0x02, SysClkReq2Valid1
* ...
* 0x80, SysClkReq8Valid1
*/
REG_INIT(AB8500_REGUSYSCLKREQVALID1, 0x03, 0x0f, 0xfe),
/*
* 0x02, SysClkReq2Valid2
* ...
* 0x80, SysClkReq8Valid2
*/
REG_INIT(AB8500_REGUSYSCLKREQVALID2, 0x03, 0x10, 0xfe),
/*
* 0x02, VTVoutEna
* 0x04, Vintcore12Ena
* 0x38, Vintcore12Sel
* 0x40, Vintcore12LP
* 0x80, VTVoutLP
*/
REG_INIT(AB8500_REGUMISC1, 0x03, 0x80, 0xfe),
/*
* 0x02, VaudioEna
* 0x04, VdmicEna
* 0x08, Vamic1Ena
* 0x10, Vamic2Ena
*/
REG_INIT(AB8500_VAUDIOSUPPLY, 0x03, 0x83, 0x1e),
/*
* 0x01, Vamic1_dzout
* 0x02, Vamic2_dzout
*/
REG_INIT(AB8500_REGUCTRL1VAMIC, 0x03, 0x84, 0x03),
/*
* 0x0c, VanaRegu
* 0x03, VpllRegu
*/
REG_INIT(AB8500_VPLLVANAREGU, 0x04, 0x06, 0x0f),
/*
* 0x01, VrefDDREna
* 0x02, VrefDDRSleepMode
*/
REG_INIT(AB8500_VREFDDR, 0x04, 0x07, 0x03),
/*
* 0x03, VextSupply1Regu
* 0x0c, VextSupply2Regu
* 0x30, VextSupply3Regu
* 0x40, ExtSupply2Bypass
* 0x80, ExtSupply3Bypass
*/
REG_INIT(AB8500_EXTSUPPLYREGU, 0x04, 0x08, 0xff),
/*
* 0x03, Vaux1Regu
* 0x0c, Vaux2Regu
*/
REG_INIT(AB8500_VAUX12REGU, 0x04, 0x09, 0x0f),
/*
* 0x03, Vaux3Regu
*/
REG_INIT(AB8500_VRF1VAUX3REGU, 0x04, 0x0a, 0x03),
/*
* 0x3f, Vsmps1Sel1
*/
REG_INIT(AB8500_VSMPS1SEL1, 0x04, 0x13, 0x3f),
/*
* 0x0f, Vaux1Sel
*/
REG_INIT(AB8500_VAUX1SEL, 0x04, 0x1f, 0x0f),
/*
* 0x0f, Vaux2Sel
*/
REG_INIT(AB8500_VAUX2SEL, 0x04, 0x20, 0x0f),
/*
* 0x07, Vaux3Sel
*/
REG_INIT(AB8500_VRF1VAUX3SEL, 0x04, 0x21, 0x07),
/*
* 0x01, VextSupply12LP
*/
REG_INIT(AB8500_REGUCTRL2SPARE, 0x04, 0x22, 0x01),
/*
* 0x04, Vaux1Disch
* 0x08, Vaux2Disch
* 0x10, Vaux3Disch
* 0x20, Vintcore12Disch
* 0x40, VTVoutDisch
* 0x80, VaudioDisch
*/
REG_INIT(AB8500_REGUCTRLDISCH, 0x04, 0x43, 0xfc),
/*
* 0x02, VanaDisch
* 0x04, VdmicPullDownEna
* 0x10, VdmicDisch
*/
REG_INIT(AB8500_REGUCTRLDISCH2, 0x04, 0x44, 0x16),
};
static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
{
struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
struct ab8500_platform_data *pdata;
int i, err;
if (!ab8500) {
dev_err(&pdev->dev, "null mfd parent\n");
return -EINVAL;
}
pdata = dev_get_platdata(ab8500->dev);
if (!pdata) {
dev_err(&pdev->dev, "null pdata\n");
return -EINVAL;
}
/* make sure the platform data has the correct size */
if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) {
dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
return -EINVAL;
}
/* initialize registers */
for (i = 0; i < pdata->num_regulator_reg_init; i++) {
int id;
u8 value;
id = pdata->regulator_reg_init[i].id;
value = pdata->regulator_reg_init[i].value;
/* check for configuration errors */
if (id >= AB8500_NUM_REGULATOR_REGISTERS) {
dev_err(&pdev->dev,
"Configuration error: id outside range.\n");
return -EINVAL;
}
if (value & ~ab8500_reg_init[id].mask) {
dev_err(&pdev->dev,
"Configuration error: value outside mask.\n");
return -EINVAL;
}
/* initialize register */
err = abx500_mask_and_set_register_interruptible(&pdev->dev,
ab8500_reg_init[id].bank,
ab8500_reg_init[id].addr,
ab8500_reg_init[id].mask,
value);
if (err < 0) {
dev_err(&pdev->dev,
"Failed to initialize 0x%02x, 0x%02x.\n",
ab8500_reg_init[id].bank,
ab8500_reg_init[id].addr);
return err;
}
dev_vdbg(&pdev->dev,
" init: 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
ab8500_reg_init[id].bank,
ab8500_reg_init[id].addr,
ab8500_reg_init[id].mask,
value);
}
/* register all regulators */
for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
struct ab8500_regulator_info *info = NULL;
/* assign per-regulator data */
info = &ab8500_regulator_info[i];
info->dev = &pdev->dev;
/* fix for hardware before ab8500v2.0 */
if (abx500_get_chip_id(info->dev) < 0x20) {
if (info->desc.id == AB8500_LDO_AUX3) {
info->desc.n_voltages =
ARRAY_SIZE(ldo_vauxn_voltages);
info->voltages = ldo_vauxn_voltages;
info->voltages_len =
ARRAY_SIZE(ldo_vauxn_voltages);
info->voltage_mask = 0xf;
}
}
/* register regulator with framework */
info->regulator = regulator_register(&info->desc, &pdev->dev,
&pdata->regulator[i], info);
if (IS_ERR(info->regulator)) {
err = PTR_ERR(info->regulator);
dev_err(&pdev->dev, "failed to register regulator %s\n",
info->desc.name);
/* when we fail, un-register all earlier regulators */
while (--i >= 0) {
info = &ab8500_regulator_info[i];
regulator_unregister(info->regulator);
}
return err;
}
dev_vdbg(rdev_get_dev(info->regulator),
"%s-probed\n", info->desc.name);
}
return 0;
}
static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
{
int i;
for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
struct ab8500_regulator_info *info = NULL;
info = &ab8500_regulator_info[i];
dev_vdbg(rdev_get_dev(info->regulator),
"%s-remove\n", info->desc.name);
regulator_unregister(info->regulator);
}
return 0;
}
static struct platform_driver ab8500_regulator_driver = {
.probe = ab8500_regulator_probe,
.remove = __devexit_p(ab8500_regulator_remove),
.driver = {
.name = "ab8500-regulator",
.owner = THIS_MODULE,
},
};
static int __init ab8500_regulator_init(void)
{
int ret;
ret = platform_driver_register(&ab8500_regulator_driver);
if (ret != 0)
pr_err("Failed to register ab8500 regulator: %d\n", ret);
return ret;
}
subsys_initcall(ab8500_regulator_init);
static void __exit ab8500_regulator_exit(void)
{
platform_driver_unregister(&ab8500_regulator_driver);
}
module_exit(ab8500_regulator_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
MODULE_ALIAS("platform:ab8500-regulator");
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