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>
diff --git a/drivers/power/mfd/fg_max77693.c b/drivers/power/mfd/fg_max77693.c
new file mode 100644
index 0000000..4519fed
--- /dev/null
+++ b/drivers/power/mfd/fg_max77693.c
@@ -0,0 +1,139 @@
+/*
+ * 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_fg.h>
+#include <i2c.h>
+#include <power/power_chrg.h>
+#include <power/battery.h>
+#include <power/fg_battery_cell_params.h>
+#include <errno.h>
+
+static int max77693_get_vcell(u32 *vcell)
+{
+ u16 value;
+ u8 ret;
+
+ ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VCELL, 1,
+ (u8 *)&value, 2);
+ if (ret)
+ return ret;
+
+ *vcell = (u32)(value >> 3);
+ *vcell = *vcell * 625;
+
+ return 0;
+}
+
+static int max77693_get_soc(u32 *soc)
+{
+ u16 value;
+ u8 ret;
+
+ ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VFSOC, 1,
+ (u8 *)&value, 2);
+ if (ret)
+ return ret;
+
+ *soc = (u32)(value >> 8);
+
+ return 0;
+}
+
+static int power_update_battery(struct pmic *p, struct pmic *bat)
+{
+ struct power_battery *pb = bat->pbat;
+ int ret;
+
+ if (pmic_probe(p)) {
+ puts("Can't find max77693 fuel gauge\n");
+ return -1;
+ }
+
+ ret = max77693_get_soc(&pb->bat->state_of_chrg);
+ if (ret)
+ return ret;
+
+ max77693_get_vcell(&pb->bat->voltage_uV);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int power_check_battery(struct pmic *p, struct pmic *bat)
+{
+ struct power_battery *pb = bat->pbat;
+ unsigned int val;
+ int ret = 0;
+
+ if (pmic_probe(p)) {
+ puts("Can't find max77693 fuel gauge\n");
+ return -1;
+ }
+
+ ret = pmic_reg_read(p, MAX77693_STATUS, &val);
+ if (ret)
+ return ret;
+ debug("fg status: 0x%x\n", val);
+
+ ret = pmic_reg_read(p, MAX77693_VERSION, &pb->bat->version);
+ if (ret)
+ return ret;
+
+ ret = power_update_battery(p, bat);
+ if (ret)
+ return ret;
+ debug("fg ver: 0x%x\n", pb->bat->version);
+ printf("BAT: state_of_charge(SOC):%d%%\n",
+ pb->bat->state_of_chrg);
+
+ printf(" voltage: %d.%6.6d [V] (expected to be %d [mAh])\n",
+ pb->bat->voltage_uV / 1000000,
+ pb->bat->voltage_uV % 1000000,
+ pb->bat->capacity);
+
+ if (pb->bat->voltage_uV > 3850000)
+ pb->bat->state = EXT_SOURCE;
+ else if (pb->bat->voltage_uV < 3600000 || pb->bat->state_of_chrg < 5)
+ pb->bat->state = CHARGE;
+ else
+ pb->bat->state = NORMAL;
+
+ return 0;
+}
+
+static struct power_fg power_fg_ops = {
+ .fg_battery_check = power_check_battery,
+ .fg_battery_update = power_update_battery,
+};
+
+int power_fg_init(unsigned char bus)
+{
+ static const char name[] = "MAX77693_FG";
+ struct pmic *p = pmic_alloc();
+
+ if (!p) {
+ printf("%s: POWER allocation error!\n", __func__);
+ return -ENOMEM;
+ }
+
+ debug("Board Fuel Gauge init\n");
+
+ p->name = name;
+ p->interface = PMIC_I2C;
+ p->number_of_regs = FG_NUM_OF_REGS;
+ p->hw.i2c.addr = MAX77693_FUEL_I2C_ADDR;
+ p->hw.i2c.tx_num = 2;
+ p->sensor_byte_order = PMIC_SENSOR_BYTE_ORDER_BIG;
+ p->bus = bus;
+
+ p->fg = &power_fg_ops;
+
+ return 0;
+}