mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 17:28:15 +00:00
d955c6de84
Support for MAX8997 built-in charger. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Stefano Babic <sbabic@denx.de>
123 lines
3 KiB
C
123 lines
3 KiB
C
/*
|
|
* Copyright (C) 2012 Samsung Electronics
|
|
* Lukasz Majewski <l.majewski@samsung.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <power/pmic.h>
|
|
#include <power/max8997_pmic.h>
|
|
#include <i2c.h>
|
|
#include <errno.h>
|
|
|
|
unsigned char max8997_reg_ldo(int uV)
|
|
{
|
|
unsigned char ret;
|
|
if (uV <= 800000)
|
|
return 0;
|
|
if (uV >= 3950000)
|
|
return MAX8997_LDO_MAX_VAL;
|
|
ret = (uV - 800000) / 50000;
|
|
if (ret > MAX8997_LDO_MAX_VAL) {
|
|
printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret);
|
|
ret = MAX8997_LDO_MAX_VAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pmic_charger_state(struct pmic *p, int state, int current)
|
|
{
|
|
unsigned char fc;
|
|
u32 val = 0;
|
|
|
|
if (pmic_probe(p))
|
|
return -1;
|
|
|
|
if (state == CHARGER_DISABLE) {
|
|
puts("Disable the charger.\n");
|
|
pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
|
|
val &= ~(MBCHOSTEN | VCHGR_FC);
|
|
pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
|
|
|
|
return -1;
|
|
}
|
|
|
|
if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
|
|
printf("%s: Wrong charge current: %d [mA]\n",
|
|
__func__, current);
|
|
return -1;
|
|
}
|
|
|
|
fc = (current - CHARGER_MIN_CURRENT) / CHARGER_CURRENT_RESOLUTION;
|
|
fc = fc & 0xf; /* up to 950 mA */
|
|
|
|
printf("Enable the charger @ %d [mA]\n", fc * CHARGER_CURRENT_RESOLUTION
|
|
+ CHARGER_MIN_CURRENT);
|
|
|
|
val = fc | MBCICHFCSET;
|
|
pmic_reg_write(p, MAX8997_REG_MBCCTRL4, val);
|
|
|
|
pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
|
|
val = MBCHOSTEN | VCHGR_FC; /* enable charger & fast charge */
|
|
pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pmic_charger_bat_present(struct pmic *p)
|
|
{
|
|
u32 val;
|
|
|
|
if (pmic_probe(p))
|
|
return -1;
|
|
|
|
pmic_reg_read(p, MAX8997_REG_STATUS4, &val);
|
|
|
|
return !(val & DETBAT);
|
|
}
|
|
|
|
static struct power_chrg power_chrg_pmic_ops = {
|
|
.chrg_bat_present = pmic_charger_bat_present,
|
|
.chrg_state = pmic_charger_state,
|
|
};
|
|
|
|
int pmic_init(unsigned char bus)
|
|
{
|
|
static const char name[] = "MAX8997_PMIC";
|
|
struct pmic *p = pmic_alloc();
|
|
|
|
if (!p) {
|
|
printf("%s: POWER allocation error!\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
debug("Board PMIC init\n");
|
|
|
|
p->name = name;
|
|
p->interface = PMIC_I2C;
|
|
p->number_of_regs = PMIC_NUM_OF_REGS;
|
|
p->hw.i2c.addr = MAX8997_I2C_ADDR;
|
|
p->hw.i2c.tx_num = 1;
|
|
p->bus = bus;
|
|
|
|
p->chrg = &power_chrg_pmic_ops;
|
|
return 0;
|
|
}
|