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pmic:max8997: Support for MAX8997 internal charger control

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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>
This commit is contained in:
Łukasz Majewski 2012-11-13 03:22:09 +00:00 committed by Anatolij Gustschin
parent 61365ffc2e
commit d955c6de84
1 changed files with 58 additions and 1 deletions
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59
drivers/power/pmic/pmic_max8997.c
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@ -43,6 +43,62 @@ unsigned char max8997_reg_ldo(int uV)
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";
@ -53,7 +109,7 @@ int pmic_init(unsigned char bus)
return -ENOMEM;
}
puts("Board PMIC init\n");
debug("Board PMIC init\n");
p->name = name;
p->interface = PMIC_I2C;
@ -62,5 +118,6 @@ int pmic_init(unsigned char bus)
p->hw.i2c.tx_num = 1;
p->bus = bus;
p->chrg = &power_chrg_pmic_ops;
return 0;
}