axp152.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012
* Henrik Nordstrom <henrik@henriknordstrom.net>
*/
#include <common.h>
#include <command.h>
#include <asm/arch/pmic_bus.h>
#include <axp_pmic.h>
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_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_aldo2(unsigned int mvolt)
{
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 100);
return pmic_bus_write(AXP152_LDO2_VOLTAGE, target);
}
int axp_init(void)
{
u8 ver;
int rc;
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;
return 0;
}
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;
}