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u-boot/drivers/power/regulator/palmas_regulator.c
Jean-Jacques Hiblot 5c970013a6 regulator: palmas: disable bypass when the LDO is enabled 
Some LDOs have a bypass capability. Make sure that the bypass is disabled
when is the LDO is enabled (otherwise the voltage can't be changed).

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2017-08-01 11:58:01 +09:00

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/*
* (C) Copyright 2016
* Texas Instruments Incorporated, <www.ti.com>
*
* Keerthy <j-keerthy@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/palmas.h>
DECLARE_GLOBAL_DATA_PTR;
#define REGULATOR_ON 0x1
#define REGULATOR_OFF 0x0
#define SMPS_MODE_MASK 0x3
#define SMPS_MODE_SHIFT 0x0
#define LDO_MODE_MASK 0x1
#define LDO_MODE_SHIFT 0x0
static const char palmas_smps_ctrl[][PALMAS_SMPS_NUM] = {
{0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 0x3c},
{0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38},
{0x20, 0x24, 0x2c, 0x30, 0x38},
};
static const char palmas_smps_volt[][PALMAS_SMPS_NUM] = {
{0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b, 0x3c},
{0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b},
{0x23, 0x27, 0x2f, 0x33, 0x3B}
};
static const char palmas_ldo_ctrl[][PALMAS_LDO_NUM] = {
{0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
{0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
{0x50, 0x52, 0x54, 0x5e, 0x62}
};
static const char palmas_ldo_volt[][PALMAS_LDO_NUM] = {
{0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
{0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
{0x51, 0x53, 0x55, 0x5f, 0x63}
};
static int palmas_smps_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= PALMAS_SMPS_STATUS_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= PALMAS_SMPS_MODE_MASK;
else
ret &= ~(PALMAS_SMPS_MODE_MASK);
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int palmas_smps_volt2hex(int uV)
{
if (uV > PALMAS_LDO_VOLT_MAX)
return -EINVAL;
if (uV > 1650000)
return (uV - 1000000) / 20000 + 0x6;
if (uV == 500000)
return 0x6;
else
return 0x6 + ((uV - 500000) / 10000);
}
static int palmas_smps_hex2volt(int hex, bool range)
{
unsigned int uV = 0;
if (hex > PALMAS_SMPS_VOLT_MAX_HEX)
return -EINVAL;
if (hex < 0x7)
uV = 500000;
else
uV = 500000 + (hex - 0x6) * 10000;
if (range)
uV *= 2;
return uV;
}
static int palmas_smps_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret;
bool range;
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
if (op == PMIC_OP_GET)
*uV = 0;
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
if (ret & PALMAS_SMPS_RANGE_MASK)
range = true;
else
range = false;
ret &= PALMAS_SMPS_VOLT_MASK;
ret = palmas_smps_hex2volt(ret, range);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = palmas_smps_volt2hex(*uV);
if (hex < 0)
return hex;
ret &= ~PALMAS_SMPS_VOLT_MASK;
ret |= hex;
if (*uV > 1650000)
ret |= PALMAS_SMPS_RANGE_MASK;
return pmic_reg_write(dev->parent, adr, ret);
}
static int palmas_ldo_bypass_enable(struct udevice *dev, bool enabled)
{
int type = dev_get_driver_data(dev_get_parent(dev));
struct dm_regulator_uclass_platdata *p;
unsigned int adr;
int reg;
if (type == TPS65917) {
/* bypass available only on LDO1 and LDO2 */
if (dev->driver_data > 2)
return -ENOTSUPP;
} else if (type == TPS659038) {
/* bypass available only on LDO9 */
if (dev->driver_data != 9)
return -ENOTSUPP;
}
p = dev_get_uclass_platdata(dev);
adr = p->ctrl_reg;
reg = pmic_reg_read(dev->parent, adr);
if (reg < 0)
return reg;
if (enabled)
reg |= PALMAS_LDO_BYPASS_EN;
else
reg &= ~PALMAS_LDO_BYPASS_EN;
return pmic_reg_write(dev->parent, adr, reg);
}
static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= PALMAS_LDO_STATUS_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= PALMAS_LDO_MODE_MASK;
else
ret &= ~(PALMAS_LDO_MODE_MASK);
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
ret = palmas_ldo_bypass_enable(dev, false);
if (ret && (ret != -ENOTSUPP))
return ret;
}
return 0;
}
static int palmas_ldo_volt2hex(int uV)
{
if (uV > PALMAS_LDO_VOLT_MAX)
return -EINVAL;
return (uV - 850000) / 50000;
}
static int palmas_ldo_hex2volt(int hex)
{
if (hex > PALMAS_LDO_VOLT_MAX_HEX)
return -EINVAL;
if (!hex)
return 0;
return (hex * 50000) + 850000;
}
static int palmas_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret;
struct dm_regulator_uclass_platdata *uc_pdata;
if (op == PMIC_OP_GET)
*uV = 0;
uc_pdata = dev_get_uclass_platdata(dev);
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= PALMAS_LDO_VOLT_MASK;
ret = palmas_ldo_hex2volt(ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = palmas_ldo_volt2hex(*uV);
if (hex < 0)
return hex;
ret &= ~PALMAS_LDO_VOLT_MASK;
ret |= hex;
if (*uV > 1650000)
ret |= 0x80;
return pmic_reg_write(dev->parent, adr, ret);
}
static int palmas_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
struct udevice *parent;
uc_pdata = dev_get_uclass_platdata(dev);
parent = dev_get_parent(dev);
int type = dev_get_driver_data(parent);
uc_pdata->type = REGULATOR_TYPE_LDO;
if (dev->driver_data) {
u8 idx = dev->driver_data - 1;
uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][idx];
uc_pdata->volt_reg = palmas_ldo_volt[type][idx];
} else {
/* check for ldoln and ldousb cases */
if (!strcmp("ldoln", dev->name)) {
uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][9];
uc_pdata->volt_reg = palmas_ldo_volt[type][9];
} else if (!strcmp("ldousb", dev->name)) {
uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][10];
uc_pdata->volt_reg = palmas_ldo_volt[type][10];
}
}
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = palmas_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return palmas_ldo_val(dev, PMIC_OP_SET, &uV);
}
static int ldo_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = palmas_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return palmas_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static int palmas_smps_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
struct udevice *parent;
int idx;
uc_pdata = dev_get_uclass_platdata(dev);
parent = dev_get_parent(dev);
int type = dev_get_driver_data(parent);
uc_pdata->type = REGULATOR_TYPE_BUCK;
switch (type) {
case PALMAS:
case TPS659038:
switch (dev->driver_data) {
case 123:
case 12:
uc_pdata->ctrl_reg = palmas_smps_ctrl[type][0];
uc_pdata->volt_reg = palmas_smps_volt[type][0];
break;
case 3:
uc_pdata->ctrl_reg = palmas_smps_ctrl[type][1];
uc_pdata->volt_reg = palmas_smps_volt[type][1];
break;
case 45:
uc_pdata->ctrl_reg = palmas_smps_ctrl[type][2];
uc_pdata->volt_reg = palmas_smps_volt[type][2];
break;
case 6:
case 7:
case 8:
case 9:
case 10:
idx = dev->driver_data - 3;
uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
uc_pdata->volt_reg = palmas_smps_volt[type][idx];
break;
default:
printf("Wrong ID for regulator\n");
}
break;
case TPS65917:
switch (dev->driver_data) {
case 1:
case 2:
case 3:
case 4:
case 5:
idx = dev->driver_data - 1;
uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
uc_pdata->volt_reg = palmas_smps_volt[type][idx];
break;
case 12:
idx = 0;
uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
uc_pdata->volt_reg = palmas_smps_volt[type][idx];
break;
default:
printf("Wrong ID for regulator\n");
}
break;
default:
printf("Invalid PMIC ID\n");
}
return 0;
}
static int smps_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = palmas_smps_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int smps_set_value(struct udevice *dev, int uV)
{
return palmas_smps_val(dev, PMIC_OP_SET, &uV);
}
static int smps_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = palmas_smps_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int smps_set_enable(struct udevice *dev, bool enable)
{
return palmas_smps_enable(dev, PMIC_OP_SET, &enable);
}
static const struct dm_regulator_ops palmas_ldo_ops = {
.get_value = ldo_get_value,
.set_value = ldo_set_value,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
};
U_BOOT_DRIVER(palmas_ldo) = {
.name = PALMAS_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &palmas_ldo_ops,
.probe = palmas_ldo_probe,
};
static const struct dm_regulator_ops palmas_smps_ops = {
.get_value = smps_get_value,
.set_value = smps_set_value,
.get_enable = smps_get_enable,
.set_enable = smps_set_enable,
};
U_BOOT_DRIVER(palmas_smps) = {
.name = PALMAS_SMPS_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &palmas_smps_ops,
.probe = palmas_smps_probe,
};
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