Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 306 insertions, 0 deletions

diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
new file mode 100644
index 000000000..06dd50771
--- /dev/null
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -0,0 +1,306 @@
+/*
+ * BQ27xxx battery monitor I2C driver
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *	Andrew F. Davis <afd@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+
+#include <linux/power/bq27xxx_battery.h>
+
+static DEFINE_IDR(battery_id);
+static DEFINE_MUTEX(battery_mutex);
+
+static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
+{
+	struct bq27xxx_device_info *di = data;
+
+	bq27xxx_battery_update(di);
+
+	return IRQ_HANDLED;
+}
+
+static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
+				    bool single)
+{
+	struct i2c_client *client = to_i2c_client(di->dev);
+	struct i2c_msg msg[2];
+	u8 data[2];
+	int ret;
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	msg[0].addr = client->addr;
+	msg[0].flags = 0;
+	msg[0].buf = &reg;
+	msg[0].len = sizeof(reg);
+	msg[1].addr = client->addr;
+	msg[1].flags = I2C_M_RD;
+	msg[1].buf = data;
+	if (single)
+		msg[1].len = 1;
+	else
+		msg[1].len = 2;
+
+	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
+	if (ret < 0)
+		return ret;
+
+	if (!single)
+		ret = get_unaligned_le16(data);
+	else
+		ret = data[0];
+
+	return ret;
+}
+
+static int bq27xxx_battery_i2c_write(struct bq27xxx_device_info *di, u8 reg,
+				     int value, bool single)
+{
+	struct i2c_client *client = to_i2c_client(di->dev);
+	struct i2c_msg msg;
+	u8 data[4];
+	int ret;
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	data[0] = reg;
+	if (single) {
+		data[1] = (u8) value;
+		msg.len = 2;
+	} else {
+		put_unaligned_le16(value, &data[1]);
+		msg.len = 3;
+	}
+
+	msg.buf = data;
+	msg.addr = client->addr;
+	msg.flags = 0;
+
+	ret = i2c_transfer(client->adapter, &msg, 1);
+	if (ret < 0)
+		return ret;
+	if (ret != 1)
+		return -EINVAL;
+	return 0;
+}
+
+static int bq27xxx_battery_i2c_bulk_read(struct bq27xxx_device_info *di, u8 reg,
+					 u8 *data, int len)
+{
+	struct i2c_client *client = to_i2c_client(di->dev);
+	int ret;
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	ret = i2c_smbus_read_i2c_block_data(client, reg, len, data);
+	if (ret < 0)
+		return ret;
+	if (ret != len)
+		return -EINVAL;
+	return 0;
+}
+
+static int bq27xxx_battery_i2c_bulk_write(struct bq27xxx_device_info *di,
+					  u8 reg, u8 *data, int len)
+{
+	struct i2c_client *client = to_i2c_client(di->dev);
+	struct i2c_msg msg;
+	u8 buf[33];
+	int ret;
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	buf[0] = reg;
+	memcpy(&buf[1], data, len);
+
+	msg.buf = buf;
+	msg.addr = client->addr;
+	msg.flags = 0;
+	msg.len = len + 1;
+
+	ret = i2c_transfer(client->adapter, &msg, 1);
+	if (ret < 0)
+		return ret;
+	if (ret != 1)
+		return -EINVAL;
+	return 0;
+}
+
+static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
+				     const struct i2c_device_id *id)
+{
+	struct bq27xxx_device_info *di;
+	int ret;
+	char *name;
+	int num;
+
+	/* Get new ID for the new battery device */
+	mutex_lock(&battery_mutex);
+	num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
+	mutex_unlock(&battery_mutex);
+	if (num < 0)
+		return num;
+
+	name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
+	if (!name)
+		goto err_mem;
+
+	di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
+	if (!di)
+		goto err_mem;
+
+	di->id = num;
+	di->dev = &client->dev;
+	di->chip = id->driver_data;
+	di->name = name;
+
+	di->bus.read = bq27xxx_battery_i2c_read;
+	di->bus.write = bq27xxx_battery_i2c_write;
+	di->bus.read_bulk = bq27xxx_battery_i2c_bulk_read;
+	di->bus.write_bulk = bq27xxx_battery_i2c_bulk_write;
+
+	ret = bq27xxx_battery_setup(di);
+	if (ret)
+		goto err_failed;
+
+	/* Schedule a polling after about 1 min */
+	schedule_delayed_work(&di->work, 60 * HZ);
+
+	i2c_set_clientdata(client, di);
+
+	if (client->irq) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+				NULL, bq27xxx_battery_irq_handler_thread,
+				IRQF_ONESHOT,
+				di->name, di);
+		if (ret) {
+			dev_err(&client->dev,
+				"Unable to register IRQ %d error %d\n",
+				client->irq, ret);
+			bq27xxx_battery_teardown(di);
+			goto err_failed;
+		}
+	}
+
+	return 0;
+
+err_mem:
+	ret = -ENOMEM;
+
+err_failed:
+	mutex_lock(&battery_mutex);
+	idr_remove(&battery_id, num);
+	mutex_unlock(&battery_mutex);
+
+	return ret;
+}
+
+static int bq27xxx_battery_i2c_remove(struct i2c_client *client)
+{
+	struct bq27xxx_device_info *di = i2c_get_clientdata(client);
+
+	bq27xxx_battery_teardown(di);
+
+	mutex_lock(&battery_mutex);
+	idr_remove(&battery_id, di->id);
+	mutex_unlock(&battery_mutex);
+
+	return 0;
+}
+
+static const struct i2c_device_id bq27xxx_i2c_id_table[] = {
+	{ "bq27200", BQ27000 },
+	{ "bq27210", BQ27010 },
+	{ "bq27500", BQ2750X },
+	{ "bq27510", BQ2751X },
+	{ "bq27520", BQ2752X },
+	{ "bq27500-1", BQ27500 },
+	{ "bq27510g1", BQ27510G1 },
+	{ "bq27510g2", BQ27510G2 },
+	{ "bq27510g3", BQ27510G3 },
+	{ "bq27520g1", BQ27520G1 },
+	{ "bq27520g2", BQ27520G2 },
+	{ "bq27520g3", BQ27520G3 },
+	{ "bq27520g4", BQ27520G4 },
+	{ "bq27521", BQ27521 },
+	{ "bq27530", BQ27530 },
+	{ "bq27531", BQ27531 },
+	{ "bq27541", BQ27541 },
+	{ "bq27542", BQ27542 },
+	{ "bq27546", BQ27546 },
+	{ "bq27742", BQ27742 },
+	{ "bq27545", BQ27545 },
+	{ "bq27421", BQ27421 },
+	{ "bq27425", BQ27425 },
+	{ "bq27426", BQ27426 },
+	{ "bq27441", BQ27441 },
+	{ "bq27621", BQ27621 },
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table);
+
+#ifdef CONFIG_OF
+static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = {
+	{ .compatible = "ti,bq27200" },
+	{ .compatible = "ti,bq27210" },
+	{ .compatible = "ti,bq27500" },
+	{ .compatible = "ti,bq27510" },
+	{ .compatible = "ti,bq27520" },
+	{ .compatible = "ti,bq27500-1" },
+	{ .compatible = "ti,bq27510g1" },
+	{ .compatible = "ti,bq27510g2" },
+	{ .compatible = "ti,bq27510g3" },
+	{ .compatible = "ti,bq27520g1" },
+	{ .compatible = "ti,bq27520g2" },
+	{ .compatible = "ti,bq27520g3" },
+	{ .compatible = "ti,bq27520g4" },
+	{ .compatible = "ti,bq27521" },
+	{ .compatible = "ti,bq27530" },
+	{ .compatible = "ti,bq27531" },
+	{ .compatible = "ti,bq27541" },
+	{ .compatible = "ti,bq27542" },
+	{ .compatible = "ti,bq27546" },
+	{ .compatible = "ti,bq27742" },
+	{ .compatible = "ti,bq27545" },
+	{ .compatible = "ti,bq27421" },
+	{ .compatible = "ti,bq27425" },
+	{ .compatible = "ti,bq27426" },
+	{ .compatible = "ti,bq27441" },
+	{ .compatible = "ti,bq27621" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, bq27xxx_battery_i2c_of_match_table);
+#endif
+
+static struct i2c_driver bq27xxx_battery_i2c_driver = {
+	.driver = {
+		.name = "bq27xxx-battery",
+		.of_match_table = of_match_ptr(bq27xxx_battery_i2c_of_match_table),
+	},
+	.probe = bq27xxx_battery_i2c_probe,
+	.remove = bq27xxx_battery_i2c_remove,
+	.id_table = bq27xxx_i2c_id_table,
+};
+module_i2c_driver(bq27xxx_battery_i2c_driver);
+
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
+MODULE_DESCRIPTION("BQ27xxx battery monitor i2c driver");
+MODULE_LICENSE("GPL");