axp152.c
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/*
* (C) Copyright 2012
* Henrik Nordstrom <henrik@henriknordstrom.net>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <i2c.h>
#include <axp_pmic.h>
#include <errno.h>
#define AXP152_I2C_ADDR 0x32
static int pmic_bus_init(void)
{
return 0;
}
static int pmic_bus_read(u8 reg, u8 *data)
{
return i2c_read(AXP152_I2C_ADDR, reg, 1, data, 1);
}
static int pmic_bus_write(u8 reg, u8 data)
{
return i2c_write(AXP152_I2C_ADDR, reg, 1, &data, 1);
}
static u8 axp152_mvolt_to_target(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_dcdc1(enum axp152_dcdc1_voltages volt)
{
if (volt < AXP152_DCDC1_1V7 || volt > AXP152_DCDC1_3V5)
return -EINVAL;
return pmic_bus_write(AXP152_DCDC1_VOLTAGE, volt);
}
int axp_set_dcdc2(unsigned int mvolt)
{
int rc;
u8 current, target;
target = axp152_mvolt_to_target(mvolt, 700, 2275, 25);
/* Do we really need to be this gentle? It has built-in voltage slope */
while ((rc = pmic_bus_read(AXP152_DCDC2_VOLTAGE, ¤t)) == 0 &&
current != target) {
if (current < target)
current++;
else
current--;
rc = pmic_bus_write(AXP152_DCDC2_VOLTAGE, current);
if (rc)
break;
}
return rc;
}
int axp_set_dcdc3(unsigned int mvolt)
{
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 50);
return pmic_bus_write(AXP152_DCDC3_VOLTAGE, target);
}
int axp_set_dcdc4(unsigned int mvolt)
{
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 25);
return pmic_bus_write(AXP152_DCDC4_VOLTAGE, target);
}
int axp_set_ldo0(enum axp152_ldo0_volts volt, enum axp152_ldo0_curr_limit curr_limit)
{
u8 target = curr_limit | (volt << 4) | (1 << 7);
return pmic_bus_write(AXP152_LDO0_VOLTAGE, target);
}
int axp_disable_ldo0(void)
{
int ret;
u8 target;
ret = pmic_bus_read(AXP152_LDO0_VOLTAGE, &target);
if (ret)
return ret;
target &= ~(1 << 7);
return pmic_bus_write(AXP152_LDO0_VOLTAGE, target);
}
int axp_set_ldo1(unsigned int mvolt)
{
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 100);
return pmic_bus_write(AXP152_LDO1_VOLTAGE, target);
}
int axp_set_ldo2(unsigned int mvolt)
{
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 100);
return pmic_bus_write(AXP152_LDO2_VOLTAGE, target);
}
int axp_set_aldo1(enum axp152_aldo_voltages volt)
{
u8 val;
int ret;
ret = pmic_bus_read(AXP152_ALDO1_ALDO2_VOLTAGE, &val);
if (ret)
return ret;
val |= (volt << 4);
return pmic_bus_write(AXP152_ALDO1_ALDO2_VOLTAGE, val);
}
int axp_set_aldo2(enum axp152_aldo_voltages volt)
{
u8 val;
int ret;
ret = pmic_bus_read(AXP152_ALDO1_ALDO2_VOLTAGE, &val);
if (ret)
return ret;
val |= volt;
return pmic_bus_write(AXP152_ALDO1_ALDO2_VOLTAGE, val);
}
int axp_set_power_output(int val)
{
return pmic_bus_write(AXP152_POWER_CONTROL, val);
}
int axp_init(void)
{
u8 ver;
int rc;
int ret;
u8 reg;
rc = pmic_bus_init();
if (rc)
return rc;
rc = pmic_bus_read(AXP152_CHIP_VERSION, &ver);
if (rc)
return rc;
if (ver != 0x05)
return -EINVAL;
/* Set the power off sequence to `reverse of power on sequence` */
ret = pmic_bus_read(AXP152_SHUTDOWN, ®);
if (ret)
return ret;
reg |= AXP152_POWEROFF_SEQ;
ret = pmic_bus_write(AXP152_SHUTDOWN, reg);
if (ret)
return ret;
/* Enable the power recovery */
ret = pmic_bus_read(AXP152_POWER_RECOVERY, ®);
if (ret)
return ret;
reg |= AXP152_POWER_RECOVERY_EN;
ret = pmic_bus_write(AXP152_POWER_RECOVERY, reg);
return ret;
}
int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
pmic_bus_write(AXP152_SHUTDOWN, AXP152_POWEROFF);
/* infinite loop during shutdown */
while (1) {}
/* not reached */
return 0;
}