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iio: add driver for Freescale MMA9553 

Add support for Freescale MMA9553L Intelligent Pedometer Platform.

The following functionalities are supported:
 - step counter (counts the number of steps using a HW register)
 - step detector (generates an iio event at every step the user takes)
 - activity recognition (rest, walking, jogging, running)
 - speed
 - calories
 - distance

To get accurate pedometer results, the user's height, weight and gender
need to be configured.

The specifications can be downloaded from:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA955xLSWRM.pdf
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
hifive-unleashed-5.1
Irina Tirdea 2015-01-29 18:45:10 +00:00 committed by Jonathan Cameron
parent 81110933a9
commit 40cb761306
6 changed files with 1589 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
Documentation/ABI/testing/sysfs-bus-iio
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@ -343,7 +343,30 @@ Description:
production inaccuracies). If shared across all channels,
<type>_calibscale is used.
What: /sys/bus/iio/devices/iio:deviceX/in_steps_calibheight
What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
KernelVersion: 3.20
Contact: linux-iio@vger.kernel.org
Description:
Gender of the user (e.g.: male, female) used by some pedometers
to compute the stride length, distance, speed and activity
type.
What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
KernelVersion: 3.20
Contact: linux-iio@vger.kernel.org
Description:
Lists all available gender values (e.g.: male, female).
What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
KernelVersion: 3.19
Contact: linux-iio@vger.kernel.org
Description:
@ -818,6 +841,14 @@ What: /sys/.../events/in_tempY_roc_falling_period
What: /sys/.../events/in_accel_x&y&z_mag_falling_period
What: /sys/.../events/in_intensity0_thresh_period
What: /sys/.../events/in_proximity0_thresh_period
What: /sys/.../events/in_activity_still_thresh_rising_period
What: /sys/.../events/in_activity_still_thresh_falling_period
What: /sys/.../events/in_activity_walking_thresh_rising_period
What: /sys/.../events/in_activity_walking_thresh_falling_period
What: /sys/.../events/in_activity_jogging_thresh_rising_period
What: /sys/.../events/in_activity_jogging_thresh_falling_period
What: /sys/.../events/in_activity_running_thresh_rising_period
What: /sys/.../events/in_activity_running_thresh_falling_period
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@ -1142,6 +1173,12 @@ Description:
This attribute is used to get/set the integration time in
seconds.
What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
KernelVersion: 3.20
Contact: linux-iio@vger.kernel.org
Description:
Number of seconds in which to compute speed.
What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
KernelVersion: 3.15
Contact: linux-iio@vger.kernel.org
@ -1170,13 +1207,17 @@ Description:
present, output should be considered as processed with the
unit in milliamps.
What: /sys/.../iio:deviceX/in_energy_en
What: /sys/.../iio:deviceX/in_distance_en
What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
What: /sys/.../iio:deviceX/in_steps_en
KernelVersion: 3.19
Contact: linux-iio@vger.kernel.org
Description:
Activates the step counter. After activation, the number of steps
taken by the user will be counted in hardware and exported through
in_steps_input.
Activates a device feature that runs in firmware/hardware.
E.g. for steps: the pedometer saves power while not used;
when activated, it will count the steps taken by the user in
firmware and export them through in_steps_input.
What: /sys/.../iio:deviceX/in_steps_input
KernelVersion: 3.19

10
drivers/iio/accel/Kconfig
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@ -126,4 +126,14 @@ config MMA9551
To compile this driver as a module, choose M here: the module
will be called mma9551.
config MMA9553
tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"
depends on I2C
select MMA9551_CORE
help
Say yes here to build support for the Freescale MMA9553L
Intelligent Pedometer Platform Driver.
To compile this driver as a module, choose M here: the module
will be called mma9553.
endmenu

1
drivers/iio/accel/Makefile
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@ -12,6 +12,7 @@ obj-$(CONFIG_MMA8452) += mma8452.o
obj-$(CONFIG_MMA9551_CORE) += mma9551_core.o
obj-$(CONFIG_MMA9551) += mma9551.o
obj-$(CONFIG_MMA9553) += mma9553.o
obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o

183
drivers/iio/accel/mma9551_core.c
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@ -53,6 +53,11 @@
#define MMA9551_AFE_Y_ACCEL_REG 0x02
#define MMA9551_AFE_Z_ACCEL_REG 0x04
/* Reset/Suspend/Clear application */
#define MMA9551_RSC_RESET 0x00
#define MMA9551_RSC_OFFSET(mask) (3 - (ffs(mask) - 1) / 8)
#define MMA9551_RSC_VAL(mask) (mask >> (((ffs(mask) - 1) / 8) * 8))
/*
* A response is composed of:
* - control registers: MB0-3
@ -274,6 +279,64 @@ int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
}
EXPORT_SYMBOL(mma9551_read_status_byte);
/**
* mma9551_read_config_word() - read 1 config word
* @client: I2C client
* @app_id: Application ID
* @reg: Application register
* @val: Pointer to store value read
*
* Read one configuration word from the device using MMA955xL command format.
* Commands to the MMA955xL platform consist of a write followed by one or
* more reads.
*
* Locking note: This function must be called with the device lock held.
* Locking is not handled inside the function. Callers should ensure they
* serialize access to the HW.
*
* Returns: 0 on success, negative value on failure.
*/
int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 *val)
{
int ret;
__be16 v;
ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
reg, NULL, 0, (u8 *)&v, 2);
*val = be16_to_cpu(v);
return ret;
}
EXPORT_SYMBOL(mma9551_read_config_word);
/**
* mma9551_write_config_word() - write 1 config word
* @client: I2C client
* @app_id: Application ID
* @reg: Application register
* @val: Value to write
*
* Write one configuration word from the device using MMA955xL command format.
* Commands to the MMA955xL platform consist of a write followed by one or
* more reads.
*
* Locking note: This function must be called with the device lock held.
* Locking is not handled inside the function. Callers should ensure they
* serialize access to the HW.
*
* Returns: 0 on success, negative value on failure.
*/
int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 val)
{
__be16 v = cpu_to_be16(val);
return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
(u8 *) &v, 2, NULL, 0);
}
EXPORT_SYMBOL(mma9551_write_config_word);
/**
* mma9551_read_status_word() - read 1 status word
* @client: I2C client
@ -305,6 +368,107 @@ int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
}
EXPORT_SYMBOL(mma9551_read_status_word);
/**
* mma9551_read_config_words() - read multiple config words
* @client: I2C client
* @app_id: Application ID
* @reg: Application register
* @len: Length of array to read in bytes
* @val: Array of words to read
*
* Read multiple configuration registers (word-sized registers).
*
* Locking note: This function must be called with the device lock held.
* Locking is not handled inside the function. Callers should ensure they
* serialize access to the HW.
*
* Returns: 0 on success, negative value on failure.
*/
int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
u16 reg, u8 len, u16 *buf)
{
int ret, i;
int len_words = len / sizeof(u16);
__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
reg, NULL, 0, (u8 *) be_buf, len);
if (ret < 0)
return ret;
for (i = 0; i < len_words; i++)
buf[i] = be16_to_cpu(be_buf[i]);
return 0;
}
EXPORT_SYMBOL(mma9551_read_config_words);
/**
* mma9551_read_status_words() - read multiple status words
* @client: I2C client
* @app_id: Application ID
* @reg: Application register
* @len: Length of array to read in bytes
* @val: Array of words to read
*
* Read multiple status registers (word-sized registers).
*
* Locking note: This function must be called with the device lock held.
* Locking is not handled inside the function. Callers should ensure they
* serialize access to the HW.
*
* Returns: 0 on success, negative value on failure.
*/
int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
u16 reg, u8 len, u16 *buf)
{
int ret, i;
int len_words = len / sizeof(u16);
__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
reg, NULL, 0, (u8 *) be_buf, len);
if (ret < 0)
return ret;
for (i = 0; i < len_words; i++)
buf[i] = be16_to_cpu(be_buf[i]);
return 0;
}
EXPORT_SYMBOL(mma9551_read_status_words);
/**
* mma9551_write_config_words() - write multiple config words
* @client: I2C client
* @app_id: Application ID
* @reg: Application register
* @len: Length of array to write in bytes
* @val: Array of words to write
*
* Write multiple configuration registers (word-sized registers).
*
* Locking note: This function must be called with the device lock held.
* Locking is not handled inside the function. Callers should ensure they
* serialize access to the HW.
*
* Returns: 0 on success, negative value on failure.
*/
int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
u16 reg, u8 len, u16 *buf)
{
int i;
int len_words = len / sizeof(u16);
__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
for (i = 0; i < len_words; i++)
be_buf[i] = cpu_to_be16(buf[i]);
return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG,
reg, (u8 *) be_buf, len, NULL, 0);
}
EXPORT_SYMBOL(mma9551_write_config_words);
/**
* mma9551_update_config_bits() - update bits in register
* @client: I2C client
@ -609,6 +773,25 @@ int mma9551_read_accel_scale(int *val, int *val2)
}
EXPORT_SYMBOL(mma9551_read_accel_scale);
/**
* mma9551_app_reset() - reset application
* @client: I2C client
* @app_mask: Application to reset
*
* Reset the given application (using the Reset/Suspend/Clear
* Control Application)
*
* Returns: 0 on success, negative value on failure.
*/
int mma9551_app_reset(struct i2c_client *client, u32 app_mask)
{
return mma9551_write_config_byte(client, MMA9551_APPID_RCS,
MMA9551_RSC_RESET +
MMA9551_RSC_OFFSET(app_mask),
MMA9551_RSC_VAL(app_mask));
}
EXPORT_SYMBOL(mma9551_app_reset);
MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");
MODULE_LICENSE("GPL v2");

17
drivers/iio/accel/mma9551_core.h
View File

@ -21,9 +21,13 @@
#define MMA9551_APPID_AFE 0x06
#define MMA9551_APPID_TILT 0x0B
#define MMA9551_APPID_SLEEP_WAKE 0x12
#define MMA9551_APPID_RESET 0x17
#define MMA9551_APPID_PEDOMETER 0x15
#define MMA9551_APPID_RCS 0x17
#define MMA9551_APPID_NONE 0xff
/* Reset/Suspend/Clear application app masks */
#define MMA9551_RSC_PED BIT(21)
#define MMA9551_AUTO_SUSPEND_DELAY_MS 2000
enum mma9551_gpio_pin {
@ -48,8 +52,18 @@ int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
u16 reg, u8 val);
int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
u16 reg, u8 *val);
int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 *val);
int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 val);
int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 *val);
int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
u16 reg, u8 len, u16 *buf);
int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
u16 reg, u8 len, u16 *buf);
int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
u16 reg, u8 len, u16 *buf);
int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
u16 reg, u8 mask, u8 val);
int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
@ -62,5 +76,6 @@ int mma9551_read_accel_chan(struct i2c_client *client,
const struct iio_chan_spec *chan,
int *val, int *val2);
int mma9551_read_accel_scale(int *val, int *val2);
int mma9551_app_reset(struct i2c_client *client, u32 app_mask);
#endif /* _MMA9551_CORE_H_ */

1334
drivers/iio/accel/mma9553.c 100644
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