mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 10:30:32 +00:00
cc7595a850
The driver provides regulator set/get voltage enable/disable functions for MAXIM MAX77663 PMICs. Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
375 lines
7 KiB
C
375 lines
7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
|
|
*/
|
|
|
|
#include <dm.h>
|
|
#include <power/pmic.h>
|
|
#include <power/regulator.h>
|
|
#include <power/max77663.h>
|
|
|
|
/* fist row is control registers, second is voltage registers */
|
|
static const char max77663_sd_reg[][MAX77663_SD_NUM] = {
|
|
{ 0x1d, 0x1e, 0x1f, 0x20, 0x21 },
|
|
{ 0x16, 0x17, 0x18, 0x19, 0x2a },
|
|
};
|
|
|
|
static const char max77663_ldo_reg[MAX77663_LDO_NUM] = {
|
|
0x23, 0x25, 0x27, 0x29, 0x2b, 0x2d, 0x2f, 0x31, 0x33
|
|
};
|
|
|
|
static int max77663_sd_enable(struct udevice *dev, int op, bool *enable)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
u32 adr = uc_pdata->ctrl_reg;
|
|
int val, ret;
|
|
|
|
val = pmic_reg_read(dev->parent, adr);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (op == PMIC_OP_GET) {
|
|
if (val & SD_STATUS_MASK)
|
|
*enable = true;
|
|
else
|
|
*enable = false;
|
|
|
|
return 0;
|
|
} else if (op == PMIC_OP_SET) {
|
|
val &= ~SD_STATUS_MASK;
|
|
|
|
if (*enable)
|
|
val |= SD_STATUS_MASK;
|
|
|
|
ret = pmic_reg_write(dev->parent, adr, val);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* max77663_*_volt2hex() - convert voltage in uV into
|
|
* applicable to register hex value
|
|
*
|
|
* @idx: regulator index
|
|
* @uV: voltage in uV
|
|
*
|
|
* Return: voltage in hex on success, -ve on failure
|
|
*/
|
|
static int max77663_sd_volt2hex(int idx, int uV)
|
|
{
|
|
switch (idx) {
|
|
case 0:
|
|
/* SD0 has max voltage 1.4V */
|
|
if (uV > SD0_VOLT_MAX)
|
|
return -EINVAL;
|
|
break;
|
|
case 1:
|
|
/* SD1 has max voltage 1.55V */
|
|
if (uV > SD1_VOLT_MAX)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
/* SD2 and SD3 have max voltage 3.79V */
|
|
if (uV > SD_VOLT_MAX)
|
|
return -EINVAL;
|
|
break;
|
|
};
|
|
|
|
if (uV < SD_VOLT_MIN)
|
|
uV = SD_VOLT_MIN;
|
|
|
|
return (uV - SD_VOLT_BASE) / 12500;
|
|
}
|
|
|
|
/**
|
|
* max77663_*_hex2volt() - convert register hex value into
|
|
* actual voltage in uV
|
|
*
|
|
* @idx: regulator index
|
|
* @hex: hex value of register
|
|
*
|
|
* Return: voltage in uV on success, -ve on failure
|
|
*/
|
|
static int max77663_sd_hex2volt(int idx, int hex)
|
|
{
|
|
switch (idx) {
|
|
case 0:
|
|
/* SD0 has max voltage 1.4V */
|
|
if (hex > SD0_VOLT_MAX_HEX)
|
|
return -EINVAL;
|
|
break;
|
|
case 1:
|
|
/* SD1 has max voltage 1.55V */
|
|
if (hex > SD1_VOLT_MAX_HEX)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
/* SD2 and SD3 have max voltage 3.79V */
|
|
if (hex > SD_VOLT_MAX_HEX)
|
|
return -EINVAL;
|
|
break;
|
|
};
|
|
|
|
if (hex < SD_VOLT_MIN_HEX)
|
|
hex = SD_VOLT_MIN_HEX;
|
|
|
|
return SD_VOLT_BASE + hex * 12500;
|
|
}
|
|
|
|
static int max77663_sd_val(struct udevice *dev, int op, int *uV)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
u32 adr = uc_pdata->volt_reg;
|
|
int idx = dev->driver_data;
|
|
int hex, ret;
|
|
|
|
if (op == PMIC_OP_GET) {
|
|
hex = pmic_reg_read(dev->parent, adr);
|
|
if (hex < 0)
|
|
return hex;
|
|
|
|
*uV = 0;
|
|
|
|
ret = max77663_sd_hex2volt(idx, hex);
|
|
if (ret < 0)
|
|
return ret;
|
|
*uV = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* SD regulators use entire register for voltage */
|
|
hex = max77663_sd_volt2hex(idx, *uV);
|
|
if (hex < 0)
|
|
return hex;
|
|
|
|
return pmic_reg_write(dev->parent, adr, hex);
|
|
}
|
|
|
|
static int max77663_sd_probe(struct udevice *dev)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
int idx = dev->driver_data;
|
|
|
|
uc_pdata->type = REGULATOR_TYPE_BUCK;
|
|
uc_pdata->ctrl_reg = max77663_sd_reg[0][idx];
|
|
uc_pdata->volt_reg = max77663_sd_reg[1][idx];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sd_get_value(struct udevice *dev)
|
|
{
|
|
int uV;
|
|
int ret;
|
|
|
|
ret = max77663_sd_val(dev, PMIC_OP_GET, &uV);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return uV;
|
|
}
|
|
|
|
static int sd_set_value(struct udevice *dev, int uV)
|
|
{
|
|
return max77663_sd_val(dev, PMIC_OP_SET, &uV);
|
|
}
|
|
|
|
static int sd_get_enable(struct udevice *dev)
|
|
{
|
|
bool enable = false;
|
|
int ret;
|
|
|
|
ret = max77663_sd_enable(dev, PMIC_OP_GET, &enable);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return enable;
|
|
}
|
|
|
|
static int sd_set_enable(struct udevice *dev, bool enable)
|
|
{
|
|
return max77663_sd_enable(dev, PMIC_OP_SET, &enable);
|
|
}
|
|
|
|
static const struct dm_regulator_ops max77663_sd_ops = {
|
|
.get_value = sd_get_value,
|
|
.set_value = sd_set_value,
|
|
.get_enable = sd_get_enable,
|
|
.set_enable = sd_set_enable,
|
|
};
|
|
|
|
U_BOOT_DRIVER(max77663_sd) = {
|
|
.name = MAX77663_SD_DRIVER,
|
|
.id = UCLASS_REGULATOR,
|
|
.ops = &max77663_sd_ops,
|
|
.probe = max77663_sd_probe,
|
|
};
|
|
|
|
static int max77663_ldo_enable(struct udevice *dev, int op, bool *enable)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
u32 adr = uc_pdata->ctrl_reg;
|
|
int val, ret;
|
|
|
|
val = pmic_reg_read(dev->parent, adr);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (op == PMIC_OP_GET) {
|
|
if (val & LDO_STATUS_MASK)
|
|
*enable = true;
|
|
else
|
|
*enable = false;
|
|
|
|
return 0;
|
|
} else if (op == PMIC_OP_SET) {
|
|
val &= ~LDO_STATUS_MASK;
|
|
|
|
if (*enable)
|
|
val |= LDO_STATUS_MASK;
|
|
|
|
ret = pmic_reg_write(dev->parent, adr, val);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max77663_ldo_volt2hex(int idx, int uV)
|
|
{
|
|
switch (idx) {
|
|
case 0:
|
|
case 1:
|
|
if (uV > LDO01_VOLT_MAX)
|
|
return -EINVAL;
|
|
|
|
return (uV - LDO_VOLT_BASE) / 25000;
|
|
case 4:
|
|
if (uV > LDO4_VOLT_MAX)
|
|
return -EINVAL;
|
|
|
|
return (uV - LDO_VOLT_BASE) / 12500;
|
|
default:
|
|
if (uV > LDO_VOLT_MAX)
|
|
return -EINVAL;
|
|
|
|
return (uV - LDO_VOLT_BASE) / 50000;
|
|
};
|
|
}
|
|
|
|
static int max77663_ldo_hex2volt(int idx, int hex)
|
|
{
|
|
if (hex > LDO_VOLT_MAX_HEX)
|
|
return -EINVAL;
|
|
|
|
switch (idx) {
|
|
case 0:
|
|
case 1:
|
|
return (hex * 25000) + LDO_VOLT_BASE;
|
|
case 4:
|
|
return (hex * 12500) + LDO_VOLT_BASE;
|
|
default:
|
|
return (hex * 50000) + LDO_VOLT_BASE;
|
|
};
|
|
}
|
|
|
|
static int max77663_ldo_val(struct udevice *dev, int op, int *uV)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
u32 adr = uc_pdata->ctrl_reg;
|
|
int idx = dev->driver_data;
|
|
int hex, val, ret;
|
|
|
|
val = pmic_reg_read(dev->parent, adr);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (op == PMIC_OP_GET) {
|
|
*uV = 0;
|
|
|
|
ret = max77663_ldo_hex2volt(idx, val & LDO_VOLT_MASK);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*uV = ret;
|
|
return 0;
|
|
}
|
|
|
|
hex = max77663_ldo_volt2hex(idx, *uV);
|
|
if (hex < 0)
|
|
return hex;
|
|
|
|
val &= ~LDO_VOLT_MASK;
|
|
|
|
return pmic_reg_write(dev->parent, adr, val | hex);
|
|
}
|
|
|
|
static int max77663_ldo_probe(struct udevice *dev)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
int idx = dev->driver_data;
|
|
|
|
uc_pdata->type = REGULATOR_TYPE_LDO;
|
|
uc_pdata->ctrl_reg = max77663_ldo_reg[idx];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ldo_get_value(struct udevice *dev)
|
|
{
|
|
int uV;
|
|
int ret;
|
|
|
|
ret = max77663_ldo_val(dev, PMIC_OP_GET, &uV);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return uV;
|
|
}
|
|
|
|
static int ldo_set_value(struct udevice *dev, int uV)
|
|
{
|
|
return max77663_ldo_val(dev, PMIC_OP_SET, &uV);
|
|
}
|
|
|
|
static int ldo_get_enable(struct udevice *dev)
|
|
{
|
|
bool enable = false;
|
|
int ret;
|
|
|
|
ret = max77663_ldo_enable(dev, PMIC_OP_GET, &enable);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return enable;
|
|
}
|
|
|
|
static int ldo_set_enable(struct udevice *dev, bool enable)
|
|
{
|
|
return max77663_ldo_enable(dev, PMIC_OP_SET, &enable);
|
|
}
|
|
|
|
static const struct dm_regulator_ops max77663_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(max77663_ldo) = {
|
|
.name = MAX77663_LDO_DRIVER,
|
|
.id = UCLASS_REGULATOR,
|
|
.ops = &max77663_ldo_ops,
|
|
.probe = max77663_ldo_probe,
|
|
};
|