mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 07:34:31 +00:00
74bf7961a0
Currently uboot wrongly uses 25mV / step for dcdc3, this is a copy and paste error introduced when adding the axp152_mvolt_to_target during review of the axp152.c driver. This results in u-boot setting Vddr to 2.3V instead of 1.5V. This commit fixes this. Signed-off-by: Hans de Goede <hdegoede@redhat.com>
97 lines
1.8 KiB
C
97 lines
1.8 KiB
C
/*
|
|
* (C) Copyright 2012
|
|
* Henrik Nordstrom <henrik@henriknordstrom.net>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
#include <common.h>
|
|
#include <i2c.h>
|
|
#include <axp152.h>
|
|
|
|
enum axp152_reg {
|
|
AXP152_CHIP_VERSION = 0x3,
|
|
AXP152_DCDC2_VOLTAGE = 0x23,
|
|
AXP152_DCDC3_VOLTAGE = 0x27,
|
|
AXP152_DCDC4_VOLTAGE = 0x2B,
|
|
AXP152_LDO2_VOLTAGE = 0x2A,
|
|
AXP152_SHUTDOWN = 0x32,
|
|
};
|
|
|
|
#define AXP152_POWEROFF (1 << 7)
|
|
|
|
static int axp152_write(enum axp152_reg reg, u8 val)
|
|
{
|
|
return i2c_write(0x30, reg, 1, &val, 1);
|
|
}
|
|
|
|
static int axp152_read(enum axp152_reg reg, u8 *val)
|
|
{
|
|
return i2c_read(0x30, reg, 1, val, 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 axp152_set_dcdc2(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 = axp152_read(AXP152_DCDC2_VOLTAGE, ¤t)) == 0 &&
|
|
current != target) {
|
|
if (current < target)
|
|
current++;
|
|
else
|
|
current--;
|
|
rc = axp152_write(AXP152_DCDC2_VOLTAGE, current);
|
|
if (rc)
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int axp152_set_dcdc3(int mvolt)
|
|
{
|
|
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 50);
|
|
|
|
return axp152_write(AXP152_DCDC3_VOLTAGE, target);
|
|
}
|
|
|
|
int axp152_set_dcdc4(int mvolt)
|
|
{
|
|
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 25);
|
|
|
|
return axp152_write(AXP152_DCDC4_VOLTAGE, target);
|
|
}
|
|
|
|
int axp152_set_ldo2(int mvolt)
|
|
{
|
|
u8 target = axp152_mvolt_to_target(mvolt, 700, 3500, 100);
|
|
|
|
return axp152_write(AXP152_LDO2_VOLTAGE, target);
|
|
}
|
|
|
|
int axp152_init(void)
|
|
{
|
|
u8 ver;
|
|
int rc;
|
|
|
|
rc = axp152_read(AXP152_CHIP_VERSION, &ver);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (ver != 0x05)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|