drivers:power:max77693: add support for new multi function pmic max77693

This patch add support for new multi function pmic max77693.
The driver is split into three modules: pmic, muic and fuelgage.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/power/mfd/pmic_max77693.c b/drivers/power/mfd/pmic_max77693.c
new file mode 100644
index 0000000000..1a4416b54f
--- /dev/null
+++ b/drivers/power/mfd/pmic_max77693.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <power/pmic.h>
+#include <power/max77693_pmic.h>
+#include <i2c.h>
+#include <errno.h>
+
+static int max77693_charger_state(struct pmic *p, int state, int current)
+{
+	unsigned int val;
+
+	if (pmic_probe(p))
+		return -1;
+
+	/* unlock write capability */
+	val = MAX77693_CHG_UNLOCK;
+	pmic_reg_write(p, MAX77693_CHG_CNFG_06, val);
+
+	if (state == CHARGER_DISABLE) {
+		puts("Disable the charger.\n");
+		pmic_reg_read(p, MAX77693_CHG_CNFG_00, &val);
+		val &= ~0x01;
+		pmic_reg_write(p, MAX77693_CHG_CNFG_00, val);
+		return -1;
+	}
+
+	if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
+		printf("%s: Wrong charge current: %d [mA]\n",
+		       __func__, current);
+		return -1;
+	}
+
+	/* set charging current */
+	pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val);
+	val &= ~MAX77693_CHG_CC;
+	val |= current * 10 / 333;	/* 0.1A/3 steps */
+	pmic_reg_write(p, MAX77693_CHG_CNFG_02, val);
+
+	/* enable charging */
+	val = MAX77693_CHG_MODE_ON;
+	pmic_reg_write(p, MAX77693_CHG_CNFG_00, val);
+
+	/* check charging current */
+	pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val);
+	val &= 0x3f;
+	printf("Enable the charger @ %d [mA]\n", val * 333 / 10);
+
+	return 0;
+}
+
+static int max77693_charger_bat_present(struct pmic *p)
+{
+	unsigned int val;
+
+	if (pmic_probe(p))
+		return -1;
+
+	pmic_reg_read(p, MAX77693_CHG_INT_OK, &val);
+
+	return !(val & MAX77693_CHG_DETBAT);
+}
+
+static struct power_chrg power_chrg_pmic_ops = {
+	.chrg_bat_present = max77693_charger_bat_present,
+	.chrg_state = max77693_charger_state,
+};
+
+int pmic_init_max77693(unsigned char bus)
+{
+	static const char name[] = "MAX77693_PMIC";
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		printf("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	debug("Board PMIC init\n");
+
+	p->name = name;
+	p->interface = PMIC_I2C;
+	p->number_of_regs = PMIC_NUM_OF_REGS;
+	p->hw.i2c.addr = MAX77693_PMIC_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	p->chrg = &power_chrg_pmic_ops;
+
+	return 0;
+}