power: battery add dummy battery driver [1/1]

PD#169027: add dummy battery and charger for CTS/VTS

some CTS and VTS testcases use the battery information, here
implement a dummy battery for it.
for P, it requires a dummy charger to set the online property to 1.

Change-Id: I7cf516f7050b3930cfdd933dc65b811289f89c4f
Signed-off-by: Shuide Chen <shuide.chen@amlogic.com>

11 files changed, 332 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 13b7bd2..a12e940 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13437,6 +13437,12 @@ AMLOGIC MAILBOX DRIVER
 M:      Yun Cai <yun.cai@amlogic.com>
 F:      drivers/amlogic/mailbox/
 
+AMLOGIC DUMMY BATTERY DRIVER
+M:      Shuide <shuide.chen@amlogic.com>
+F:      drivers/amlogic/battery/
+F:      drivers/amlogic/battery/amlogic_battery.c
+F:      drivers/amlogic/battery/amlogic_charger.c
+
 AMLOGIC REGISTER DEBUG DRIVER
 M:      Yun Cai <yun.cai@amlogic.com>
 F:	drivers/amlogic/reg_access/
diff --git a/arch/arm64/boot/dts/amlogic/gxl_p212_1g.dts b/arch/arm64/boot/dts/amlogic/gxl_p212_1g.dts
index 3b46504..36939bb 100644
--- a/arch/arm64/boot/dts/amlogic/gxl_p212_1g.dts
+++ b/arch/arm64/boot/dts/amlogic/gxl_p212_1g.dts
@@ -139,6 +139,16 @@
 		};
 	};
 
+	dummy-battery {
+		compatible = "amlogic, dummy-battery";
+		status = "okay";
+	};
+
+	dummy-charger {
+		compatible = "amlogic, dummy-charger";
+		status = "okay";
+	};
+
 	bt-dev{
 		compatible = "amlogic, bt-dev";
 		dev_name = "bt-dev";
diff --git a/arch/arm64/boot/dts/amlogic/gxl_p212_2g.dts b/arch/arm64/boot/dts/amlogic/gxl_p212_2g.dts
index 8f13082..98d49d7 100644
--- a/arch/arm64/boot/dts/amlogic/gxl_p212_2g.dts
+++ b/arch/arm64/boot/dts/amlogic/gxl_p212_2g.dts
@@ -148,6 +148,16 @@
 		};
 	};
 
+	dummy-battery {
+		compatible = "amlogic, dummy-battery";
+		status = "okay";
+	};
+
+	dummy-charger {
+		compatible = "amlogic, dummy-charger";
+		status = "okay";
+	};
+
 	bt-dev{
 		compatible = "amlogic, bt-dev";
 		dev_name = "bt-dev";
diff --git a/arch/arm64/boot/dts/amlogic/txlx_t962e_r321.dts b/arch/arm64/boot/dts/amlogic/txlx_t962e_r321.dts
index 9365027..d1d8f02 100644
--- a/arch/arm64/boot/dts/amlogic/txlx_t962e_r321.dts
+++ b/arch/arm64/boot/dts/amlogic/txlx_t962e_r321.dts
@@ -212,6 +212,15 @@
 		};
 	};
 
+	dummy-battery {
+		compatible = "amlogic, dummy-battery";
+		status = "okay";
+	};
+	dummy-charger {
+		compatible = "amlogic, dummy-charger";
+		status = "okay";
+	};
+
 	ethmac: ethernet@0xff3f0000 {
 		compatible = "amlogic, gxbb-eth-dwmac";
 		status = "okay";
diff --git a/arch/arm64/configs/meson64_defconfig b/arch/arm64/configs/meson64_defconfig
index 4ea0942..389af7d 100644
--- a/arch/arm64/configs/meson64_defconfig
+++ b/arch/arm64/configs/meson64_defconfig
@@ -361,6 +361,8 @@ CONFIG_AMLOGIC_ATV_DEMOD=y
 CONFIG_AMLOGIC_DEBUG=y
 CONFIG_AMLOGIC_DEBUG_LOCKUP=y
 CONFIG_AMLOGIC_DEFENDKEY=y
+CONFIG_AMLOGIC_BATTERY_DUMMY=y
+CONFIG_AMLOGIC_CHARGER_DUMMY=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
diff --git a/drivers/amlogic/Kconfig b/drivers/amlogic/Kconfig
index bbae04d..ea7a11b 100644
--- a/drivers/amlogic/Kconfig
+++ b/drivers/amlogic/Kconfig
@@ -132,5 +132,6 @@ source "drivers/amlogic/debug/Kconfig"
 
 source "drivers/amlogic/defendkey/Kconfig"
 
+source "drivers/amlogic/battery/Kconfig"
 endmenu
 endif
diff --git a/drivers/amlogic/Makefile b/drivers/amlogic/Makefile
index fb12f96..e28869c 100644
--- a/drivers/amlogic/Makefile
+++ b/drivers/amlogic/Makefile
@@ -49,6 +49,9 @@ obj-$(CONFIG_AMLOGIC_EFUSE)             += efuse/
 
 obj-$(CONFIG_AMLOGIC_REBOOT)		+= reboot/
 
+obj-$(CONFIG_AMLOGIC_BATTERY_DUMMY)     += battery/
+obj-$(CONFIG_AMLOGIC_CHARGER_DUMMY)     += battery/
+
 obj-$(CONFIG_AMLOGIC_INTERNAL_PHY)	+= ethernet/phy/
 
 obj-$(CONFIG_AMLOGIC_CPU_HOTPLUG)	+= cpu_hotplug/
diff --git a/drivers/amlogic/battery/Kconfig b/drivers/amlogic/battery/Kconfig
new file mode 100644
index 0000000..d5229c4
--- a/dev/null
+++ b/drivers/amlogic/battery/Kconfig
@@ -0,0 +1,15 @@
+config AMLOGIC_BATTERY_DUMMY
+	tristate "Dummy battery driver for Amlogic"
+	help
+	  Say Y to enable generic support for battery charging according
+	  to common Android policies.
+	  This driver adds periodic battery level and health monitoring,
+	  kernel log reporting and other debugging features, common board
+	  battery file glue logic for battery/case temperature sensors,
+	  etc.
+
+config AMLOGIC_CHARGER_DUMMY
+	tristate "Dummy charger driver for Amlogic"
+	help
+	  Say Y to enable dummy support for battery charging according
+	  to common Android policies
diff --git a/drivers/amlogic/battery/Makefile b/drivers/amlogic/battery/Makefile
new file mode 100644
index 0000000..4cbe530
--- a/dev/null
+++ b/drivers/amlogic/battery/Makefile
@@ -0,0 +1,3 @@
+
+obj-$(CONFIG_AMLOGIC_BATTERY_DUMMY)	        += amlogic_battery.o
+obj-$(CONFIG_AMLOGIC_CHARGER_DUMMY)	        += amlogic_charger.o
\ No newline at end of file
diff --git a/drivers/amlogic/battery/amlogic_battery.c b/drivers/amlogic/battery/amlogic_battery.c
new file mode 100644
index 0000000..cf6c52b
--- a/dev/null
+++ b/drivers/amlogic/battery/amlogic_battery.c
@@ -0,0 +1,153 @@
+/*
+ * drivers/amlogic/battery/amlogic_battery.c
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/mutex.h>
+#include <linux/string.h>
+#include <linux/power_supply.h>
+
+struct dummy_battery_info {
+	struct device *dev;
+	struct power_supply *battery;
+	struct mutex lock;
+	unsigned int present;
+};
+
+static int dummy_batt_get_prop(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	static int counter = 1;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = 1;
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		val->intval = 100;
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = 4200;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		val->intval = 4100;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		val->intval = 1100;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+		val->intval = counter++;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL:
+		val->intval = 10000000;
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	default:
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static int dummy_batt_set_prop(struct power_supply *psy,
+			enum power_supply_property psp,
+			const union power_supply_propval *val)
+{
+		return -EPERM;
+}
+
+static enum power_supply_property dummy_batt_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_CHARGE_COUNTER,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CHARGE_FULL,
+};
+
+static const struct power_supply_desc dummy_battery_desc = {
+	.name           = "Battery",
+	.type           = POWER_SUPPLY_TYPE_BATTERY,
+	.properties     = dummy_batt_props,
+	.num_properties     = ARRAY_SIZE(dummy_batt_props),
+	.get_property       = dummy_batt_get_prop,
+	.set_property       = dummy_batt_set_prop,
+};
+
+static int dummy_battery_probe(struct platform_device *pdev)
+{
+	struct dummy_battery_info *info;
+	struct device *dev = &pdev->dev;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->dev = dev;
+
+	mutex_init(&info->lock);
+	platform_set_drvdata(pdev, info);
+
+	info->battery = devm_power_supply_register(dev,
+						   &dummy_battery_desc,
+						   NULL);
+	if (IS_ERR(info->battery)) {
+		pr_err("\n%ld\n", PTR_ERR(info->battery));
+		return PTR_ERR(info->battery);
+	}
+
+	info->battery->dev.parent = dev;
+
+	return 0;
+}
+
+static const struct of_device_id meson_dummybattery_dt_match[] = {
+	{
+		.compatible = "amlogic, dummy-battery",
+	},
+	{},
+};
+
+static struct platform_driver dummy_battery_driver = {
+	.driver = {
+		   .name = "dummy-battery",
+		   .owner = THIS_MODULE,
+		   .of_match_table = meson_dummybattery_dt_match,
+	},
+	.probe = dummy_battery_probe,
+};
+
+module_platform_driver(dummy_battery_driver);
+
+MODULE_DESCRIPTION("Amlogic Dummy Battery driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Shuide Chen<shuide.chen@amlogic.com>");
diff --git a/drivers/amlogic/battery/amlogic_charger.c b/drivers/amlogic/battery/amlogic_charger.c
new file mode 100644
index 0000000..5ea9c53
--- a/dev/null
+++ b/drivers/amlogic/battery/amlogic_charger.c
@@ -0,0 +1,120 @@
+/*
+ * drivers/amlogic/battery/amlogic_charger.c
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/mutex.h>
+#include <linux/string.h>
+#include <linux/power_supply.h>
+
+struct dummy_charger_info {
+	struct device *dev;
+	struct power_supply *usb;
+	unsigned int online;
+};
+
+static int dummy_usb_get_prop(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = 1;
+		break;
+	default:
+		return -ENODEV;
+	}
+	return 0;
+}
+
+
+static enum power_supply_property dummy_usb_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const struct power_supply_desc dummy_charger_desc = {
+	.name       = "usb",
+	.type       = POWER_SUPPLY_TYPE_USB,
+	.properties = dummy_usb_props,
+	.num_properties = ARRAY_SIZE(dummy_usb_props),
+	.get_property   = dummy_usb_get_prop,
+};
+
+static int dummy_charger_probe(struct platform_device *pdev)
+{
+	struct dummy_charger_info *info;
+	struct device *dev = &pdev->dev;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->dev = dev;
+	platform_set_drvdata(pdev, info);
+
+	info->usb = power_supply_register(dev, &dummy_charger_desc,
+					 NULL);
+
+	if (IS_ERR(info->usb)) {
+		pr_err("\n%ld\n", PTR_ERR(info->usb));
+		return PTR_ERR(info->usb);
+	}
+
+	info->usb->dev.parent = dev;
+
+	return 0;
+}
+
+static int dummy_charger_remove(struct platform_device *pdev)
+{
+	struct dummy_charger_info *info = platform_get_drvdata(pdev);
+
+	power_supply_unregister(info->usb);
+	return 0;
+}
+
+
+static const struct of_device_id meson_dummycharger_dt_match[] = {
+	{
+		.compatible = "amlogic, dummy-charger",
+	},
+	{},
+};
+
+static struct platform_driver dummy_charger_driver = {
+	.driver = {
+		   .name = "dummy-charger",
+		   .owner = THIS_MODULE,
+		   .of_match_table = meson_dummycharger_dt_match,
+	},
+	.probe = dummy_charger_probe,
+	.remove = dummy_charger_remove,
+
+};
+
+module_platform_driver(dummy_charger_driver);
+
+MODULE_DESCRIPTION("Amlogic Dummy Charger driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Shuide Chen<shuide.chen@amlogic.com>");