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u-boot/drivers/power/regulator/tps65219_regulator.c
Neil Armstrong 411502ccb8 regulator: add driver for the TPS65219 BUCK & LDO regulators 
The TPS65219 I2S PMIC features 3 Buck converters and 4 linear regulators,
2 GPOs, 1 GPIO, and 3 multi-function-pin.

This adds the driver for the Buck converters & linear regulators.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-05-09 13:40:24 -04:00

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7.4 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2022 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.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/tps65219.h>
static const unsigned int tps65219_buck_vout[TPS65219_BUCK_NUM] = {
[0] = TPS65219_BUCK1_VOUT_REG,
[1] = TPS65219_BUCK2_VOUT_REG,
[2] = TPS65219_BUCK3_VOUT_REG
};
static const unsigned int tps65219_ldo_vout[TPS65219_LDO_NUM] = {
[0] = TPS65219_LDO1_VOUT_REG,
[1] = TPS65219_LDO2_VOUT_REG,
[2] = TPS65219_LDO3_VOUT_REG,
[3] = TPS65219_LDO4_VOUT_REG,
};
static int tps65219_reg_enable(struct udevice *dev, unsigned int adr, int idx,
int op, bool *enable)
{
int ret;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
if (ret & BIT(idx))
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= BIT(idx);
else
ret &= ~BIT(idx);
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int tps65219_buck_enable(struct udevice *dev, int op, bool *enable)
{
unsigned int adr;
struct dm_regulator_uclass_plat *uc_pdata;
int idx;
idx = dev->driver_data - 1;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->ctrl_reg;
return tps65219_reg_enable(dev, adr, idx, op, enable);
}
static int tps65219_buck_volt2val(int uV)
{
if (uV > TPS65219_BUCK_VOLT_MAX)
return -EINVAL;
else if (uV >= 1400000)
return (uV - 1400000) / 100000 + 0x20;
else if (uV >= 600000)
return (uV - 600000) / 25000 + 0x00;
else
return -EINVAL;
}
static int tps65219_buck_val2volt(int val)
{
if (val > TPS65219_VOLT_MASK)
return -EINVAL;
else if (val > 0x34)
return TPS65219_BUCK_VOLT_MAX;
else if (val > 0x20)
return 1400000 + (val - 0x20) * 100000;
else if (val >= 0)
return 600000 + val * 25000;
else
return -EINVAL;
}
static int tps65219_buck_val(struct udevice *dev, int op, int *uV)
{
unsigned int adr;
int ret, val;
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
*uV = 0;
ret &= TPS65219_VOLT_MASK;
ret = tps65219_buck_val2volt(ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
val = tps65219_buck_volt2val(*uV);
if (val < 0)
return val;
ret &= ~TPS65219_VOLT_MASK;
ret |= val;
ret = pmic_reg_write(dev->parent, adr, ret);
udelay(100);
return ret;
}
static int tps65219_ldo_enable(struct udevice *dev, int op, bool *enable)
{
unsigned int adr;
struct dm_regulator_uclass_plat *uc_pdata;
int idx;
idx = TPS65219_BUCK_NUM + (dev->driver_data - 1);
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->ctrl_reg;
return tps65219_reg_enable(dev, adr, idx, op, enable);
}
static int tps65219_ldo_volt2val(int idx, int uV)
{
int base = TPS65219_LDO12_VOLT_MIN;
int max = TPS65219_LDO12_VOLT_MAX;
if (idx > 1) {
base = TPS65219_LDO34_VOLT_MIN;
max = TPS65219_LDO34_VOLT_MAX;
}
if (uV > max)
return -EINVAL;
else if (uV >= base)
return (uV - TPS65219_LDO12_VOLT_MIN) / 50000;
else
return -EINVAL;
}
static int tps65219_ldo_val2volt(int idx, int val)
{
int reg_base = TPS65219_LDO12_VOLT_REG_MIN;
int reg_max = TPS65219_LDO12_VOLT_REG_MAX;
int base = TPS65219_LDO12_VOLT_MIN;
int max = TPS65219_LDO12_VOLT_MAX;
if (idx > 1) {
base = TPS65219_LDO34_VOLT_MIN;
max = TPS65219_LDO34_VOLT_MAX;
reg_base = TPS65219_LDO34_VOLT_REG_MIN;
reg_max = TPS65219_LDO34_VOLT_REG_MAX;
}
if (val > TPS65219_VOLT_MASK || val < 0)
return -EINVAL;
else if (val >= reg_max)
return max;
else if (val <= reg_base)
return base;
else if (val >= 0)
return TPS65219_LDO12_VOLT_MIN + (50000 * val);
else
return -EINVAL;
}
static int tps65219_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int adr;
int ret, val;
struct dm_regulator_uclass_plat *uc_pdata;
int idx;
idx = dev->driver_data - 1;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
*uV = 0;
ret &= TPS65219_VOLT_MASK;
ret = tps65219_ldo_val2volt(idx, ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
/* LDO1 & LDO2 in BYPASS mode only supports 1.5V max */
if (idx < 2 &&
(ret & BIT(TPS65219_LDO12_BYP_CONFIG)) &&
*uV < TPS65219_LDO12_VOLT_BYP_MIN)
return -EINVAL;
val = tps65219_ldo_volt2val(idx, *uV);
if (val < 0)
return val;
ret &= ~TPS65219_VOLT_MASK;
ret |= val;
ret = pmic_reg_write(dev->parent, adr, ret);
udelay(100);
return ret;
}
static int tps65219_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 must be in 1..TPS65219_LDO_NUM */
idx = dev->driver_data;
if (idx < 1 || idx > TPS65219_LDO_NUM) {
printf("Wrong ID for regulator\n");
return -EINVAL;
}
uc_pdata->ctrl_reg = TPS65219_ENABLE_CTRL_REG;
uc_pdata->volt_reg = tps65219_ldo_vout[idx - 1];
return 0;
}
static int tps65219_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 must be in 1..TPS65219_BUCK_NUM */
idx = dev->driver_data;
if (idx < 1 || idx > TPS65219_BUCK_NUM) {
printf("Wrong ID for regulator\n");
return -EINVAL;
}
uc_pdata->ctrl_reg = TPS65219_ENABLE_CTRL_REG;
uc_pdata->volt_reg = tps65219_buck_vout[idx - 1];
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = tps65219_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return tps65219_ldo_val(dev, PMIC_OP_SET, &uV);
}
static int ldo_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = tps65219_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return tps65219_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static int buck_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = tps65219_buck_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int buck_set_value(struct udevice *dev, int uV)
{
return tps65219_buck_val(dev, PMIC_OP_SET, &uV);
}
static int buck_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = tps65219_buck_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return tps65219_buck_enable(dev, PMIC_OP_SET, &enable);
}
static const struct dm_regulator_ops tps65219_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(tps65219_ldo) = {
.name = TPS65219_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &tps65219_ldo_ops,
.probe = tps65219_ldo_probe,
};
static const struct dm_regulator_ops tps65219_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(tps65219_buck) = {
.name = TPS65219_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &tps65219_buck_ops,
.probe = tps65219_buck_probe,
};
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