Signed-off-by: Matt Ranostay <matt@ranostay.consulting>
---
drivers/power/supply/bq27xxx_battery_i2c.c | 62 ++++++++++++++++++++++++++++++
include/linux/power/bq27xxx_battery.h | 4 ++
2 files changed, 66 insertions(+)
diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
index 27143230839a..89e1dfec69fc 100644
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -68,6 +68,64 @@ static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg,
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;
+ unsigned char data[4];
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ data[0] = reg;
+ if (single) {
+ data[1] = (unsigned char) value;
+ msg.len = 2;
+ } else {
+ put_unaligned_le16(value, &data[1]);
+ msg.len = 3;
+ }
+
+ msg.buf = data;
+ msg.addr = client->addr;
+ msg.flags = 0;
+
+ return i2c_transfer(client->adapter, &msg, 1) == 1 ? 0 : -EINVAL;
+}
+
+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);
+
+ if (!client->adapter)
+ return -ENODEV;
+
+ return i2c_smbus_read_i2c_block_data(client, reg, len, data);
+}
+
+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];
+
+ 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;
+
+ return i2c_transfer(client->adapter, &msg, 1) == 1 ? 0 : -EINVAL;
+}
+
static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -95,7 +153,11 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
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)
diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
index 14ecac158150..a4c2dfbbca02 100644
--- a/include/linux/power/bq27xxx_battery.h
+++ b/include/linux/power/bq27xxx_battery.h
@@ -33,6 +33,9 @@ struct bq27xxx_platform_data {
struct bq27xxx_device_info;
struct bq27xxx_access_methods {
int (*read)(struct bq27xxx_device_info *di, u8 reg, bool single);
+ int (*write)(struct bq27xxx_device_info *di, u8 reg, int value, bool single);
+ int (*read_bulk)(struct bq27xxx_device_info *di, u8 reg, u8 *data, int len);
+ int (*write_bulk)(struct bq27xxx_device_info *di, u8 reg, u8 *data, int len);
};
struct bq27xxx_reg_cache {
@@ -63,6 +66,7 @@ struct bq27xxx_device_info {
struct list_head list;
struct mutex lock;
u8 *regs;
+ u8 buffer[32];
};
void bq27xxx_battery_update(struct bq27xxx_device_info *di);
--
2.10.2
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
