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| author | Łukasz Majewski <l.majewski@samsung.com> | 2012-11-13 03:22:09 +0000 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2012-11-14 11:21:11 +0100 |
| commit | d955c6de84f59f5787fac399851af5b0e912b07a (patch) | |
| tree | 5fe6d8ae9912a9aade13c5f925c4a81672e128d7 | |
| parent | 61365ffc2efc52717af1b4c38a71b4a3d8c77149 (diff) | |
| download | u-boot-imx-d955c6de84f59f5787fac399851af5b0e912b07a.zip u-boot-imx-d955c6de84f59f5787fac399851af5b0e912b07a.tar.gz u-boot-imx-d955c6de84f59f5787fac399851af5b0e912b07a.tar.bz2 | |
pmic:max8997: Support for MAX8997 internal charger control
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>
| -rw-r--r-- | drivers/power/pmic/pmic_max8997.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/drivers/power/pmic/pmic_max8997.c b/drivers/power/pmic/pmic_max8997.c index 2e46884..4e5c6d6 100644 --- a/drivers/power/pmic/pmic_max8997.c +++ b/drivers/power/pmic/pmic_max8997.c @@ -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; } |