// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012-2015 Samsung Electronics
*
* Rajeshwari Shinde <rajeshwari.s@samsung.com>
* Przemyslaw Marczak <p.marczak@samsung.com>
*/
#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/max77686_pmic.h>
#define MODE(_id, _val, _name) { \
.id = _id, \
.register_value = _val, \
.name = _name, \
}
/* LDO: 1,3,4,5,9,17,18,19,20,21,22,23,24,26,26,27 */
static struct dm_regulator_mode max77686_ldo_mode_standby1[] = {
MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
MODE(OPMODE_LPM, MAX77686_LDO_MODE_LPM, "LPM"),
MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
};
/* LDO: 2,6,7,8,10,11,12,14,15,16 */
static struct dm_regulator_mode max77686_ldo_mode_standby2[] = {
MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
MODE(OPMODE_STANDBY, MAX77686_LDO_MODE_STANDBY, "ON/OFF"),
MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
};
/* Buck: 1 */
static struct dm_regulator_mode max77686_buck_mode_standby[] = {
MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
};
/* Buck: 2,3,4 */
static struct dm_regulator_mode max77686_buck_mode_lpm[] = {
MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
MODE(OPMODE_LPM, MAX77686_BUCK_MODE_LPM, "LPM"),
MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
};
/* Buck: 5,6,7,8,9 */
static struct dm_regulator_mode max77686_buck_mode_onoff[] = {
MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
};
static const char max77686_buck_ctrl[] = {
0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
};
static const char max77686_buck_out[] = {
0xff, 0x11, 0x14, 0x1e, 0x28, 0x31, 0x33, 0x35, 0x37, 0x39
};
static int max77686_buck_volt2hex(int buck, int uV)
{
int hex = 0;
int hex_max = 0;
switch (buck) {
case 2:
case 3:
case 4:
/* hex = (uV - 600000) / 12500; */
hex = (uV - MAX77686_BUCK_UV_LMIN) / MAX77686_BUCK_UV_LSTEP;
hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
break;
default:
/*
* hex = (uV - 750000) / 50000. We assume that dynamic voltage
* scaling via GPIOs is not enabled and don't support that.
* If this is enabled then the driver will need to take that
* into account and check different registers depending on
* the current setting. See the datasheet for details.
*/
hex = (uV - MAX77686_BUCK_UV_HMIN) / MAX77686_BUCK_UV_HSTEP;
hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
break;
}
if (hex >= 0 && hex <= hex_max)
return hex;
pr_err("Value: %d uV is wrong for BUCK%d", uV, buck);
return -EINVAL;
}
static int max77686_buck_hex2volt(int buck, int hex)
{
unsigned uV = 0;
int hex_max = 0;
if (hex < 0)
goto bad_hex;
switch (buck) {
case 2:
case 3:
case 4:
hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
if (hex > hex_max)
goto bad_hex;
/* uV = hex * 12500 + 600000; */
uV = hex * MAX77686_BUCK_UV_LSTEP + MAX77686_BUCK_UV_LMIN;
break;
default:
hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
if (hex > hex_max)
goto bad_hex;
/* uV = hex * 50000 + 750000; */
uV = hex * MAX77686_BUCK_UV_HSTEP + MAX77686_BUCK_UV_HMIN;
break;
}
return uV;
bad_hex:
pr_err("Value: %#x is wrong for BUCK%d", hex, buck);
return -EINVAL;
}
static int max77686_ldo_volt2hex(int ldo, int uV)
{
int hex = 0;
switch (ldo) {
case 1:
case 2:
case 6:
case 7:
case 8:
case 15:
hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_LSTEP;
/* hex = (uV - 800000) / 25000; */
break;
default:
hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_HSTEP;
/* hex = (uV - 800000) / 50000; */
}
if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
return hex;
pr_err("Value: %d uV is wrong for LDO%d", uV, ldo);
return -EINVAL;
}
static int max77686_ldo_hex2volt(int ldo, int hex)
{
unsigned int uV = 0;
if (hex > MAX77686_LDO_VOLT_MAX_HEX)
goto bad_hex;
switch (ldo) {
case 1:
case 2:
case 6:
case 7:
case 8:
case 15:
/* uV = hex * 25000 + 800000; */
uV = hex * MAX77686_LDO_UV_LSTEP + MAX77686_LDO_UV_MIN;
break;
default:
/* uV = hex * 50000 + 800000; */
uV = hex * MAX77686_LDO_UV_HSTEP + MAX77686_LDO_UV_MIN;
}
return uV;
bad_hex:
pr_err("Value: %#x is wrong for ldo%d", hex, ldo);
return -EINVAL;
}
static int max77686_ldo_hex2mode(int ldo, int hex)
{
if (hex > MAX77686_LDO_MODE_MASK)
return -EINVAL;
switch (hex) {
case MAX77686_LDO_MODE_OFF:
return OPMODE_OFF;
case MAX77686_LDO_MODE_LPM: /* == MAX77686_LDO_MODE_STANDBY: */
/* The same mode values but different meaning for each ldo */
switch (ldo) {
case 2:
case 6:
case 7:
case 8:
case 10:
case 11:
case 12:
case 14:
case 15:
case 16:
return OPMODE_STANDBY;
default:
return OPMODE_LPM;
}
case MAX77686_LDO_MODE_STANDBY_LPM:
return OPMODE_STANDBY_LPM;
case MAX77686_LDO_MODE_ON:
return OPMODE_ON;
default:
return -EINVAL;
}
}
static int max77686_buck_hex2mode(int buck, int hex)
{
if (hex > MAX77686_BUCK_MODE_MASK)
return -EINVAL;
switch (hex) {
case MAX77686_BUCK_MODE_OFF:
return OPMODE_OFF;
case MAX77686_BUCK_MODE_ON:
return OPMODE_ON;
case MAX77686_BUCK_MODE_STANDBY:
switch (buck) {
case 1:
case 2:
case 3:
case 4:
return OPMODE_STANDBY;
default:
return -EINVAL;
}
case MAX77686_BUCK_MODE_LPM:
switch (buck) {
case 2:
case 3:
case 4:
return OPMODE_LPM;
default:
return -EINVAL;
}
default:
return -EINVAL;
}
}
static int max77686_buck_modes(int buck, struct dm_regulator_mode **modesp)
{
int ret = -EINVAL;
if (buck < 1 || buck > MAX77686_BUCK_NUM)
return ret;
switch (buck) {
case 1:
*modesp = max77686_buck_mode_standby;
ret = ARRAY_SIZE(max77686_buck_mode_standby);
break;
case 2:
case 3:
case 4:
*modesp = max77686_buck_mode_lpm;
ret = ARRAY_SIZE(max77686_buck_mode_lpm);
break;
default:
*modesp = max77686_buck_mode_onoff;
ret = ARRAY_SIZE(max77686_buck_mode_onoff);
}
return ret;
}
static int max77686_ldo_modes(int ldo, struct dm_regulator_mode **modesp,
struct udevice *dev)
{
int ret = -EINVAL;
if (ldo < 1 || ldo > MAX77686_LDO_NUM)
return ret;
switch (ldo) {
case 2:
case 6:
case 7:
case 8:
case 10:
case 11:
case 12:
case 14:
case 15:
case 16:
*modesp = max77686_ldo_mode_standby2;
ret = ARRAY_SIZE(max77686_ldo_mode_standby2);
break;
default:
*modesp = max77686_ldo_mode_standby1;
ret = ARRAY_SIZE(max77686_ldo_mode_standby1);
}
return ret;
}
static int max77686_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int adr;
unsigned char val;
int hex, ldo, ret;
if (op == PMIC_OP_GET)
*uV = 0;
ldo = dev->driver_data;
if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
pr_err("Wrong ldo number: %d", ldo);
return -EINVAL;
}
adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
ret = pmic_read(dev->parent, adr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= MAX77686_LDO_VOLT_MASK;
ret = max77686_ldo_hex2volt(ldo, val);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = max77686_ldo_volt2hex(ldo, *uV);
if (hex < 0)
return hex;
val &= ~MAX77686_LDO_VOLT_MASK;
val |= hex;
ret = pmic_write(dev->parent, adr, &val, 1);
return ret;
}
static int max77686_buck_val(struct udevice *dev, int op, int *uV)
{
unsigned int mask, adr;
unsigned char val;
int hex, buck, ret;
buck = dev->driver_data;
if (buck < 1 || buck > MAX77686_BUCK_NUM) {
pr_err("Wrong buck number: %d", buck);
return -EINVAL;
}
if (op == PMIC_OP_GET)
*uV = 0;
/* &buck_out = ctrl + 1 */
adr = max77686_buck_out[buck];
/* mask */
switch (buck) {
case 2:
case 3:
case 4:
mask = MAX77686_BUCK234_VOLT_MASK;
break;
default:
mask = MAX77686_BUCK_VOLT_MASK;
break;
}
ret = pmic_read(dev->parent, adr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= mask;
ret = max77686_buck_hex2volt(buck, val);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = max77686_buck_volt2hex(buck, *uV);
if (hex < 0)
return hex;
val &= ~mask;
val |= hex;
ret = pmic_write(dev->parent, adr, &val, 1);
return ret;
}
static int max77686_ldo_mode(struct udevice *dev, int op, int *opmode)
{
unsigned int adr, mode;
unsigned char val;
int ldo, ret;
if (op == PMIC_OP_GET)
*opmode = -EINVAL;
ldo = dev->driver_data;
if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
pr_err("Wrong ldo number: %d", ldo);
return -EINVAL;
}
adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
ret = pmic_read(dev->parent, adr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= MAX77686_LDO_MODE_MASK;
ret = max77686_ldo_hex2mode(ldo, val);
if (ret < 0)
return ret;
*opmode = ret;
return 0;
}
/* mode */
switch (*opmode) {
case OPMODE_OFF:
mode = MAX77686_LDO_MODE_OFF;
break;
case OPMODE_LPM:
switch (ldo) {
case 2:
case 6:
case 7:
case 8:
case 10:
case 11:
case 12:
case 14:
case 15:
case 16:
return -EINVAL;
default:
mode = MAX77686_LDO_MODE_LPM;
}
break;
case OPMODE_STANDBY:
switch (ldo) {
case 2:
case 6:
case 7:
case 8:
case 10:
case 11:
case 12:
case 14:
case 15:
case 16:
mode = MAX77686_LDO_MODE_STANDBY;
break;
default:
return -EINVAL;
}
break;
case OPMODE_STANDBY_LPM:
mode = MAX77686_LDO_MODE_STANDBY_LPM;
break;
case OPMODE_ON:
mode = MAX77686_LDO_MODE_ON;
break;
default:
mode = 0xff;
}
if (mode == 0xff) {
pr_err("Wrong mode: %d for ldo%d", *opmode, ldo);
return -EINVAL;
}
val &= ~MAX77686_LDO_MODE_MASK;
val |= mode;
ret = pmic_write(dev->parent, adr, &val, 1);
return ret;
}
static int max77686_ldo_enable(struct udevice *dev, int op, bool *enable)
{
int ret, on_off;
if (op == PMIC_OP_GET) {
ret = max77686_ldo_mode(dev, op, &on_off);
if (ret)
return ret;
switch (on_off) {
case OPMODE_OFF:
*enable = false;
break;
case OPMODE_ON:
*enable = true;
break;
default:
return -EINVAL;
}
} else if (op == PMIC_OP_SET) {
if (*enable)
on_off = OPMODE_ON;
else
on_off = OPMODE_OFF;
ret = max77686_ldo_mode(dev, op, &on_off);
if (ret)
return ret;
}
return 0;
}
static int max77686_buck_mode(struct udevice *dev, int op, int *opmode)
{
unsigned int mask, adr, mode, mode_shift;
unsigned char val;
int buck, ret;
buck = dev->driver_data;
if (buck < 1 || buck > MAX77686_BUCK_NUM) {
pr_err("Wrong buck number: %d", buck);
return -EINVAL;
}
adr = max77686_buck_ctrl[buck];
/* mask */
switch (buck) {
case 2:
case 3:
case 4:
mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
break;
default:
mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
}
mask = MAX77686_BUCK_MODE_MASK << mode_shift;
ret = pmic_read(dev->parent, adr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= mask;
val >>= mode_shift;
ret = max77686_buck_hex2mode(buck, val);
if (ret < 0)
return ret;
*opmode = ret;
return 0;
}
/* mode */
switch (*opmode) {
case OPMODE_OFF:
mode = MAX77686_BUCK_MODE_OFF;
break;
case OPMODE_STANDBY:
switch (buck) {
case 1:
case 2:
case 3:
case 4:
mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
break;
default:
mode = 0xff;
}
break;
case OPMODE_LPM:
switch (buck) {
case 2:
case 3:
case 4:
mode = MAX77686_BUCK_MODE_LPM << mode_shift;
break;
default:
mode = 0xff;
}
break;
case OPMODE_ON:
mode = MAX77686_BUCK_MODE_ON << mode_shift;
break;
default:
mode = 0xff;
}
if (mode == 0xff) {
pr_err("Wrong mode: %d for buck: %d\n", *opmode, buck);
return -EINVAL;
}
val &= ~mask;
val |= mode;
ret = pmic_write(dev->parent, adr, &val, 1);
return ret;
}
static int max77686_buck_enable(struct udevice *dev, int op, bool *enable)
{
int ret, on_off;
if (op == PMIC_OP_GET) {
ret = max77686_buck_mode(dev, op, &on_off);
if (ret)
return ret;
switch (on_off) {
case OPMODE_OFF:
*enable = false;
break;
case OPMODE_ON:
*enable = true;
break;
default:
return -EINVAL;
}
} else if (op == PMIC_OP_SET) {
if (*enable)
on_off = OPMODE_ON;
else
on_off = OPMODE_OFF;
ret = max77686_buck_mode(dev, op, &on_off);
if (ret)
return ret;
}
return 0;
}
static int max77686_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_LDO;
uc_pdata->mode_count = max77686_ldo_modes(dev->driver_data,
&uc_pdata->mode, dev);
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = max77686_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return max77686_ldo_val(dev, PMIC_OP_SET, &uV);
}
static int ldo_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = max77686_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return max77686_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static int ldo_get_mode(struct udevice *dev)
{
int mode;
int ret;
ret = max77686_ldo_mode(dev, PMIC_OP_GET, &mode);
if (ret)
return ret;
return mode;
}
static int ldo_set_mode(struct udevice *dev, int mode)
{
return max77686_ldo_mode(dev, PMIC_OP_SET, &mode);
}
static int max77686_buck_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_BUCK;
uc_pdata->mode_count = max77686_buck_modes(dev->driver_data,
&uc_pdata->mode);
return 0;
}
static int buck_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = max77686_buck_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int buck_set_value(struct udevice *dev, int uV)
{
return max77686_buck_val(dev, PMIC_OP_SET, &uV);
}
static int buck_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = max77686_buck_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return max77686_buck_enable(dev, PMIC_OP_SET, &enable);
}
static int buck_get_mode(struct udevice *dev)
{
int mode;
int ret;
ret = max77686_buck_mode(dev, PMIC_OP_GET, &mode);
if (ret)
return ret;
return mode;
}
static int buck_set_mode(struct udevice *dev, int mode)
{
return max77686_buck_mode(dev, PMIC_OP_SET, &mode);
}
static const struct dm_regulator_ops max77686_ldo_ops = {
.get_value = ldo_get_value,
.set_value = ldo_set_value,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
.get_mode = ldo_get_mode,
.set_mode = ldo_set_mode,
};
U_BOOT_DRIVER(max77686_ldo) = {
.name = MAX77686_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &max77686_ldo_ops,
.probe = max77686_ldo_probe,
};
static const struct dm_regulator_ops max77686_buck_ops = {
.get_value = buck_get_value,
.set_value = buck_set_value,
.get_enable = buck_get_enable,
.set_enable = buck_set_enable,
.get_mode = buck_get_mode,
.set_mode = buck_set_mode,
};
U_BOOT_DRIVER(max77686_buck) = {
.name = MAX77686_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &max77686_buck_ops,
.probe = max77686_buck_probe,
};