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u-boot/drivers/power/regulator/tps65941_regulator.c
Sinthu Raja df1fa2718f drivers: power: regulator: tps65941_regulator: Add support for 3Phase buck 
Buck regulator 1, 2 and 3 of TPS6594132 on j721e-sk is in 3 Phase
confguration, in-order to support this, add configuring 3 Phase buck
in tps65941 while driver probing.

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
2022-02-16 14:19:29 -05:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2019
* Texas Instruments Incorporated, <www.ti.com>
*
* Keerthy <j-keerthy@ti.com>
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <log.h>
#include <linux/delay.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/tps65941.h>
static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
0xC};
static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
0x14, 0x16};
static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
0x20};
static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
0x26};
static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= TPS65941_BUCK_MODE_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= TPS65941_BUCK_MODE_MASK;
else
ret &= ~TPS65941_BUCK_MODE_MASK;
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int tps65941_buck_volt2val(int uV)
{
if (uV > TPS65941_BUCK_VOLT_MAX)
return -EINVAL;
else if (uV > 1650000)
return (uV - 1660000) / 20000 + 0xAB;
else if (uV > 1110000)
return (uV - 1110000) / 10000 + 0x73;
else if (uV > 600000)
return (uV - 600000) / 5000 + 0x0F;
else if (uV >= 300000)
return (uV - 300000) / 20000 + 0x00;
else
return -EINVAL;
}
static int tps65941_buck_val2volt(int val)
{
if (val > TPS65941_BUCK_VOLT_MAX_HEX)
return -EINVAL;
else if (val > 0xAB)
return 1660000 + (val - 0xAB) * 20000;
else if (val > 0x73)
return 1100000 + (val - 0x73) * 10000;
else if (val > 0xF)
return 600000 + (val - 0xF) * 5000;
else if (val >= 0x0)
return 300000 + val * 5000;
else
return -EINVAL;
}
int tps65941_lookup_slew(int id)
{
switch (id) {
case 0:
return 33000;
case 1:
return 20000;
case 2:
return 10000;
case 3:
return 5000;
case 4:
return 2500;
case 5:
return 1300;
case 6:
return 630;
case 7:
return 310;
default:
return -1;
}
}
static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret, delta, uwait, slew;
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(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;
ret &= TPS65941_BUCK_VOLT_MASK;
ret = tps65941_buck_val2volt(ret);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
*uV = ret;
return 0;
}
/*
* Compute the delta voltage, find the slew rate and wait
* for the appropriate amount of time after voltage switch
*/
if (*uV > ret)
delta = *uV - ret;
else
delta = ret - *uV;
slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
if (slew < 0)
return ret;
slew &= TP65941_BUCK_CONF_SLEW_MASK;
slew = tps65941_lookup_slew(slew);
if (slew <= 0)
return ret;
uwait = delta / slew;
hex = tps65941_buck_volt2val(*uV);
if (hex < 0)
return hex;
ret &= 0x0;
ret = hex;
ret = pmic_reg_write(dev->parent, adr, ret);
udelay(uwait);
return ret;
}
static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= TPS65941_LDO_MODE_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= TPS65941_LDO_MODE_MASK;
else
ret &= ~TPS65941_LDO_MODE_MASK;
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int tps65941_ldo_val2volt(int val)
{
if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
return -EINVAL;
else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
else
return -EINVAL;
}
static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret;
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(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;
ret &= TPS65941_LDO_VOLT_MASK;
ret = tps65941_ldo_val2volt(ret);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
*uV = ret;
return 0;
}
hex = tps65941_buck_volt2val(*uV);
if (hex < 0)
return hex;
ret &= 0x0;
ret = hex;
ret = pmic_reg_write(dev->parent, adr, ret);
return ret;
}
static int tps65941_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_pdata;
int idx;
uc_pdata = dev_get_uclass_plat(dev);
uc_pdata->type = REGULATOR_TYPE_LDO;
idx = dev->driver_data;
if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
debug("Single phase regulator\n");
} else {
printf("Wrong ID for regulator\n");
return -EINVAL;
}
uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
return 0;
}
static int tps65941_buck_probe(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_pdata;
int idx;
uc_pdata = dev_get_uclass_plat(dev);
uc_pdata->type = REGULATOR_TYPE_BUCK;
idx = dev->driver_data;
if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
debug("Single phase regulator\n");
} else if (idx == 12) {
idx = 1;
} else if (idx == 34) {
idx = 3;
} else if (idx == 123) {
idx = 1;
} else if (idx == 1234) {
idx = 1;
} else {
printf("Wrong ID for regulator\n");
return -EINVAL;
}
uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
}
static int ldo_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static int buck_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int buck_set_value(struct udevice *dev, int uV)
{
return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
}
static int buck_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
}
static const struct dm_regulator_ops tps65941_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(tps65941_ldo) = {
.name = TPS65941_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &tps65941_ldo_ops,
.probe = tps65941_ldo_probe,
};
static const struct dm_regulator_ops tps65941_buck_ops = {
.get_value = buck_get_value,
.set_value = buck_set_value,
.get_enable = buck_get_enable,
.set_enable = buck_set_enable,
};
U_BOOT_DRIVER(tps65941_buck) = {
.name = TPS65941_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &tps65941_buck_ops,
.probe = tps65941_buck_probe,
};
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