[U-Boot] [PATCH v4 18/24] pmic:max8997: Support for MAX8997 internal charger control

Lukasz Majewski
2012-10-30T16:57:13Z

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>
---
Changes for v2:
- power_init_battery() method added to be called from MAX8997 struct pmic
instance
Changes for v3:
- change code according to struct pmic redesign
Changes for v4:
- None
---
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 47ef7f6..0603d94 100644
--- a/drivers/power/pmic/pmic_max8997.c
+++ b/drivers/power/pmic/pmic_max8997.c
@@ -42,12 +42,68 @@ 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)
{
struct pmic *p = pmic_alloc();
static const char name[] = "MAX8997_PMIC";

- puts("Board PMIC init\n");
+ debug("Board PMIC init\n");

p->name = name;
p->interface = PMIC_I2C;
@@ -56,5 +112,6 @@ int pmic_init(unsigned char bus)
p->hw.i2c.tx_num = 1;
p->bus = bus;

+ p->chrg = &power_chrg_pmic_ops;
return 0;
}
--
1.7.2.3