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>

diff --git a/drivers/power/pmic/pmic_max8997.c b/drivers/power/pmic/pmic_max8997.c
index 2e46884dd68191f33942eef85aad54f509341de5..4e5c6d647fbb9f5916316b5ed8d6cc4316284dba 100644 (file)
--- 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;
 }