power: bq2419x: Implement WDT timer

BQ2419X support the WDT timer which reset the configuration
on expiration. Handling the WDT timer to proper functiong of device.

Following are details of changes:
- Implement WDT reset in kthread with high priority.
- Configure WDT time based on platform data,
- Merge the VBUS regulator in the charger driver itself as
charger or VBUS can happen mutually.
- Displaying the charging fault when happens.
- Other cleanups to reduce code size and make better readability.
- Related chnages in board file.

Bug 1240114

Change-Id: Iefa79b7c0c791e8a1d69b44d9399aab7730a2da9
Signed-off-by: Syed Rafiuddin <srafiuddin@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/205495
Reviewed-by: Mrutyunjay Sawant <msawant@nvidia.com>
Tested-by: Mrutyunjay Sawant <msawant@nvidia.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/include/linux/power/bq2419x-charger.h b/include/linux/power/bq2419x-charger.h
new file mode 100644
index 000000000000..577777e6c0ec
--- /dev/null
+++ b/include/linux/power/bq2419x-charger.h
@@ -0,0 +1,122 @@
+/*
+ * bq2419x-charger.h -- BQ24190/BQ24192/BQ24192i/BQ24193 Charger driver
+ *
+ * Copyright (C) 2012 - 2013 NVIDIA Corporation
+
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ * Author: Syed Rafiuddin <srafiuddin@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA	02110-1301, USA.
+ *
+ */
+
+#ifndef __LINUX_POWER_BQ2419X_CHARGER_H
+#define __LINUX_POWER_BQ2419X_CHARGER_H
+
+
+/* Register definitions */
+#define BQ2419X_INPUT_SRC_REG		0x00
+#define BQ2419X_PWR_ON_REG		0x01
+#define BQ2419X_CHRG_CTRL_REG		0x02
+#define BQ2419X_CHRG_TERM_REG		0x03
+#define BQ2419X_VOLT_CTRL_REG		0x04
+#define BQ2419X_TIME_CTRL_REG		0x05
+#define BQ2419X_THERM_REG		0x06
+#define BQ2419X_MISC_OPER_REG		0x07
+#define BQ2419X_SYS_STAT_REG		0x08
+#define BQ2419X_FAULT_REG		0x09
+#define BQ2419X_REVISION_REG		0x0a
+
+#define BQ24190_IC_VER			0x40
+#define BQ24192_IC_VER			0x28
+#define BQ24192i_IC_VER			0x18
+
+#define BQ2419X_ENABLE_CHARGE_MASK	0x30
+#define BQ2419X_ENABLE_CHARGE		0x10
+#define BQ2419X_ENABLE_VBUS		0x20
+
+#define BQ2419X_REG0			0x0
+#define BQ2419X_EN_HIZ			BIT(7)
+
+#define BQ2419X_WD			0x5
+#define BQ2419X_WD_MASK			0x30
+#define BQ2419X_WD_DISABLE		0x00
+#define BQ2419X_WD_40ms			0x10
+#define BQ2419X_WD_80ms			0x20
+#define BQ2419X_WD_160ms		0x30
+
+#define BQ2419x_VBUS_STAT		0xc0
+#define BQ2419x_VBUS_UNKNOWN		0x00
+#define BQ2419x_VBUS_USB		0x40
+#define BQ2419x_VBUS_AC			0x80
+
+#define BQ2419x_CHRG_STATE_MASK			0x30
+#define BQ2419x_CHRG_STATE_NOTCHARGING		0x00
+#define BQ2419x_CHRG_STATE_PRE_CHARGE		0x10
+#define BQ2419x_CHRG_STATE_POST_CHARGE		0x20
+#define BQ2419x_CHRG_STATE_CHARGE_DONE		0x30
+
+#define BQ2419x_FAULT_WATCHDOG_FAULT		BIT(7)
+#define BQ2419x_FAULT_BOOST_FAULT		BIT(6)
+#define BQ2419x_FAULT_CHRG_FAULT_MASK		0x30
+#define BQ2419x_FAULT_CHRG_NORMAL		0x00
+#define BQ2419x_FAULT_CHRG_INPUT		0x10
+#define BQ2419x_FAULT_CHRG_THERMAL		0x20
+#define BQ2419x_FAULT_CHRG_SAFTY		0x30
+
+#define BQ2419x_FAULT_NTC_FAULT			0x07
+
+#define BQ2419x_CONFIG_MASK		0x7
+#define BQ2419X_MAX_REGS		(BQ2419X_REVISION_REG + 1)
+
+/*
+ * struct bq2419x_vbus_platform_data - bq2419x VBUS platform data.
+ *
+ * @gpio_otg_iusb: GPIO number for OTG/IUSB
+ * @num_consumer_supplies: Number fo consumer for vbus regulators.
+ * @consumer_supplies: List of consumer suppliers.
+ */
+struct bq2419x_vbus_platform_data {
+	int gpio_otg_iusb;
+	int num_consumer_supplies;
+	struct regulator_consumer_supply *consumer_supplies;
+};
+
+/*
+ * struct bq2419x_charger_platform_data - bq2419x charger platform data.
+ */
+struct bq2419x_charger_platform_data {
+	unsigned use_mains:1;
+	unsigned use_usb:1;
+	void (*update_status)(int, int);
+	int (*battery_check)(void);
+
+	int max_charge_volt_mV;
+	int max_charge_current_mA;
+	int charging_term_current_mA;
+	int wdt_timeout;
+	int num_consumer_supplies;
+	struct regulator_consumer_supply *consumer_supplies;
+};
+
+/*
+ * struct bq2419x_platform_data - bq2419x platform data.
+ */
+struct bq2419x_platform_data {
+	struct bq2419x_vbus_platform_data *vbus_pdata;
+	struct bq2419x_charger_platform_data *bcharger_pdata;
+};
+
+#endif /* __LINUX_POWER_BQ2419X_CHARGER_H */