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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-21 20:11:44 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-21 20:11:44 (GMT) |
commit | b5c78e04dd061b776978dad61dd85357081147b0 (patch) | |
tree | 2416b2dc61c452c3aeb2a32bcedf15e6257be638 /drivers/iio/common/st_sensors/st_sensors_i2c.c | |
parent | 06991c28f37ad68e5c03777f5c3b679b56e3dac1 (diff) | |
parent | 951348b377385475aa256c27e1c9e2564c9ec160 (diff) | |
download | linux-b5c78e04dd061b776978dad61dd85357081147b0.tar.xz |
Merge tag 'staging-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging tree update from Greg Kroah-Hartman:
"Here's the big staging tree merge for 3.9-rc1
Lots of cleanups and updates for drivers all through the staging tree.
We are pretty much "code neutral" here, adding just about as many
lines as we removed.
All of these have been in linux-next for a while."
* tag 'staging-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (804 commits)
staging: comedi: vmk80xx: wait for URBs to complete
staging: comedi: drivers: addi-data: hwdrv_apci3200.c: Add a missing semicolon
staging: et131x: Update TODO list
staging: et131x: Remove assignment of skb->dev
staging: wlan-ng: hfa384x.h: fix for error reported by smatch
staging/zache checkpatch ERROR: spaces prohibited around that
staging/ozwpan: Mark read only parameters and structs as const
staging/ozwpan: Remove empty and unused function oz_cdev_heartbeat
staging/ozwpan: Mark local functions as static (fix sparse warnings)
staging/ozwpan: Add missing header includes
staging/usbip: Mark local functions as static (fix sparse warnings)
staging/xgifb: Remove duplicated code in loops.
staging/xgifb: Consolidate return paths
staging/xgifb: Remove code without effect
staging/xgifb: Remove unnecessary casts
staging/xgifb: Consolidate if/else if with identical code branches
staging: vt6656: replaced custom TRUE definition with true
staging: vt6656: replaced custom FALSE definition with false
staging: vt6656: replace custom BOOL definition with bool
staging/rtl8187se: Mark functions as static to silence sparse
...
Diffstat (limited to 'drivers/iio/common/st_sensors/st_sensors_i2c.c')
-rw-r--r-- | drivers/iio/common/st_sensors/st_sensors_i2c.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c new file mode 100644 index 0000000..38af944 --- /dev/null +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c @@ -0,0 +1,81 @@ +/* + * STMicroelectronics sensors i2c library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors_i2c.h> + + +#define ST_SENSORS_I2C_MULTIREAD 0x80 + +static unsigned int st_sensors_i2c_get_irq(struct iio_dev *indio_dev) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + return to_i2c_client(sdata->dev)->irq; +} + +static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, u8 *res_byte) +{ + int err; + + err = i2c_smbus_read_byte_data(to_i2c_client(dev), reg_addr); + if (err < 0) + goto st_accel_i2c_read_byte_error; + + *res_byte = err & 0xff; + +st_accel_i2c_read_byte_error: + return err < 0 ? err : 0; +} + +static int st_sensors_i2c_read_multiple_byte( + struct st_sensor_transfer_buffer *tb, struct device *dev, + u8 reg_addr, int len, u8 *data, bool multiread_bit) +{ + if (multiread_bit) + reg_addr |= ST_SENSORS_I2C_MULTIREAD; + + return i2c_smbus_read_i2c_block_data(to_i2c_client(dev), + reg_addr, len, data); +} + +static int st_sensors_i2c_write_byte(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, u8 data) +{ + return i2c_smbus_write_byte_data(to_i2c_client(dev), reg_addr, data); +} + +static const struct st_sensor_transfer_function st_sensors_tf_i2c = { + .read_byte = st_sensors_i2c_read_byte, + .write_byte = st_sensors_i2c_write_byte, + .read_multiple_byte = st_sensors_i2c_read_multiple_byte, +}; + +void st_sensors_i2c_configure(struct iio_dev *indio_dev, + struct i2c_client *client, struct st_sensor_data *sdata) +{ + i2c_set_clientdata(client, indio_dev); + + indio_dev->dev.parent = &client->dev; + indio_dev->name = client->name; + + sdata->tf = &st_sensors_tf_i2c; + sdata->get_irq_data_ready = st_sensors_i2c_get_irq; +} +EXPORT_SYMBOL(st_sensors_i2c_configure); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver"); +MODULE_LICENSE("GPL v2"); |