[U-Boot] [PATCH 14/16] pmic:max8997: Support for MAX8997 internal charger control

[Lukasz Majewski]

Support for MAX8997 built-in charger.

Signed-off-by: Lukasz Majewski <l.majewski at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 drivers/misc/pmic_max8997.c  |   52 ++++++++++++++++++++++++++++++++++++++++++
 include/power/max8997_pmic.h |    3 +-
 2 files changed, 54 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/pmic_max8997.c b/drivers/misc/pmic_max8997.c
index a4158e2..5fd2ae8 100644
--- a/drivers/misc/pmic_max8997.c
+++ b/drivers/misc/pmic_max8997.c
@@ -59,3 +59,55 @@ unsigned char max8997_reg_ldo(int uV)
 	return ret;
 }
 
+int pmic_charger_state(int state, int current)
+{
+	struct pmic *p = pmic_get("MAX8997_PMIC");
+	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;
+}
+
+int pmic_charger_bat_present(void)
+{
+	struct pmic *p = pmic_get("MAX8997_PMIC");
+	u32 val;
+
+	if (pmic_probe(p))
+		return -1;
+
+	pmic_reg_read(p, MAX8997_REG_STATUS4, &val);
+
+	return !(val & DETBAT);
+}
diff --git a/include/power/max8997_pmic.h b/include/power/max8997_pmic.h
index b7edee4..b3baada 100644
--- a/include/power/max8997_pmic.h
+++ b/include/power/max8997_pmic.h
@@ -209,6 +209,7 @@ enum {
 	EN_LDO = (0x3 << 6),
 };
 
+int pmic_charger_state(int state, int current);
 unsigned char max8997_reg_ldo(int uV);
-
+int pmic_charger_bat_present(void);
 #endif /* __MAX8997_PMIC_H_ */
-- 
1.7.2.3