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/*
* (C) Copyright 2012
* Henrik Nordstrom <henrik@henriknordstrom.net>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <axp_pmic.h>
static int axp209_write(enum axp209_reg reg, u8 val)
{
return i2c_write(0x34, reg, 1, &val, 1);
}
static int axp209_read(enum axp209_reg reg, u8 *val)
{
return i2c_read(0x34, reg, 1, val, 1);
}
static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
{
if (mvolt < min)
mvolt = min;
else if (mvolt > max)
mvolt = max;
return (mvolt - min) / div;
}
int axp_set_dcdc2(unsigned int mvolt)
{
int rc;
u8 cfg, current;
cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
/* Do we really need to be this gentle? It has built-in voltage slope */
while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
current != cfg) {
if (current < cfg)
current++;
else
current--;
rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
if (rc)
break;
}
return rc;
}
int axp_set_dcdc3(unsigned int mvolt)
{
u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
}
int axp_set_aldo2(unsigned int mvolt)
{
int rc;
u8 cfg, reg;
cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
if (rc)
return rc;
/* LDO2 configuration is in upper 4 bits */
reg = (reg & 0x0f) | (cfg << 4);
return axp209_write(AXP209_LDO24_VOLTAGE, reg);
}
int axp_set_aldo3(unsigned int mvolt)
{
u8 cfg;
if (mvolt == -1)
cfg = 0x80; /* determined by LDO3IN pin */
else
cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
}
int axp_set_aldo4(unsigned int mvolt)
{
int rc;
static const unsigned int vindex[] = {
1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
2700, 2800, 3000, 3100, 3200, 3300
};
u8 cfg, reg;
/* Translate mvolt to register cfg value, requested <= selected */
for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
if (rc)
return rc;
/* LDO4 configuration is in lower 4 bits */
reg = (reg & 0xf0) | (cfg << 0);
return axp209_write(AXP209_LDO24_VOLTAGE, reg);
}
int axp_init(void)
{
u8 ver;
int i, rc;
rc = axp209_read(AXP209_CHIP_VERSION, &ver);
if (rc)
return rc;
/* Low 4 bits is chip version */
ver &= 0x0f;
if (ver != 0x1)
return -1;
/* Mask all interrupts */
for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
rc = axp209_write(i, 0);
if (rc)
return rc;
}
return 0;
}
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