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>
This commit is contained in:
Irina Tirdea
Jonathan Cameron
parent
81110933a9
commit
40cb761306
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@ -343,7 +343,30 @@ Description:
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production inaccuracies). If shared across all channels,
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<type>_calibscale is used.
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What: /sys/bus/iio/devices/iio:deviceX/in_steps_calibheight
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What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
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What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
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What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
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What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
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KernelVersion: 3.20
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Contact: linux-iio@vger.kernel.org
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Description:
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Gender of the user (e.g.: male, female) used by some pedometers
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to compute the stride length, distance, speed and activity
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type.
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What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
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What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
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What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
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What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
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KernelVersion: 3.20
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Contact: linux-iio@vger.kernel.org
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Description:
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Lists all available gender values (e.g.: male, female).
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What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
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What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
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What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
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What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
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KernelVersion: 3.19
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Contact: linux-iio@vger.kernel.org
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Description:
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@ -818,6 +841,14 @@ What: /sys/.../events/in_tempY_roc_falling_period
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What: /sys/.../events/in_accel_x&y&z_mag_falling_period
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What: /sys/.../events/in_intensity0_thresh_period
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What: /sys/.../events/in_proximity0_thresh_period
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What: /sys/.../events/in_activity_still_thresh_rising_period
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What: /sys/.../events/in_activity_still_thresh_falling_period
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What: /sys/.../events/in_activity_walking_thresh_rising_period
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What: /sys/.../events/in_activity_walking_thresh_falling_period
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What: /sys/.../events/in_activity_jogging_thresh_rising_period
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What: /sys/.../events/in_activity_jogging_thresh_falling_period
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What: /sys/.../events/in_activity_running_thresh_rising_period
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What: /sys/.../events/in_activity_running_thresh_falling_period
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KernelVersion: 2.6.37
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Contact: linux-iio@vger.kernel.org
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Description:
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@ -1142,6 +1173,12 @@ Description:
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This attribute is used to get/set the integration time in
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seconds.
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What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
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KernelVersion: 3.20
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Contact: linux-iio@vger.kernel.org
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Description:
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Number of seconds in which to compute speed.
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What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
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KernelVersion: 3.15
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Contact: linux-iio@vger.kernel.org
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@ -1170,13 +1207,17 @@ Description:
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present, output should be considered as processed with the
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unit in milliamps.
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What: /sys/.../iio:deviceX/in_energy_en
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What: /sys/.../iio:deviceX/in_distance_en
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What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
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What: /sys/.../iio:deviceX/in_steps_en
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KernelVersion: 3.19
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Contact: linux-iio@vger.kernel.org
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Description:
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Activates the step counter. After activation, the number of steps
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taken by the user will be counted in hardware and exported through
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in_steps_input.
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Activates a device feature that runs in firmware/hardware.
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E.g. for steps: the pedometer saves power while not used;
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when activated, it will count the steps taken by the user in
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firmware and export them through in_steps_input.
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What: /sys/.../iio:deviceX/in_steps_input
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KernelVersion: 3.19
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@ -126,4 +126,14 @@ config MMA9551
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To compile this driver as a module, choose M here: the module
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will be called mma9551.
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config MMA9553
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tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"
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depends on I2C
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select MMA9551_CORE
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help
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Say yes here to build support for the Freescale MMA9553L
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Intelligent Pedometer Platform Driver.
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To compile this driver as a module, choose M here: the module
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will be called mma9553.
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endmenu
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@ -12,6 +12,7 @@ obj-$(CONFIG_MMA8452) += mma8452.o
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obj-$(CONFIG_MMA9551_CORE) += mma9551_core.o
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obj-$(CONFIG_MMA9551) += mma9551.o
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obj-$(CONFIG_MMA9553) += mma9553.o
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obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o
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@ -53,6 +53,11 @@
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#define MMA9551_AFE_Y_ACCEL_REG 0x02
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#define MMA9551_AFE_Z_ACCEL_REG 0x04
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/* Reset/Suspend/Clear application */
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#define MMA9551_RSC_RESET 0x00
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#define MMA9551_RSC_OFFSET(mask) (3 - (ffs(mask) - 1) / 8)
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#define MMA9551_RSC_VAL(mask) (mask >> (((ffs(mask) - 1) / 8) * 8))
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/*
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* A response is composed of:
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* - control registers: MB0-3
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@ -274,6 +279,64 @@ int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
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}
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EXPORT_SYMBOL(mma9551_read_status_byte);
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/**
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* mma9551_read_config_word() - read 1 config word
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* @client: I2C client
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* @app_id: Application ID
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* @reg: Application register
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* @val: Pointer to store value read
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*
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* Read one configuration word from the device using MMA955xL command format.
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* Commands to the MMA955xL platform consist of a write followed by one or
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* more reads.
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*
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* Locking note: This function must be called with the device lock held.
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* Locking is not handled inside the function. Callers should ensure they
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* serialize access to the HW.
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*
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* Returns: 0 on success, negative value on failure.
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*/
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int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
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u16 reg, u16 *val)
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{
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int ret;
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__be16 v;
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ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
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reg, NULL, 0, (u8 *)&v, 2);
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*val = be16_to_cpu(v);
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return ret;
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}
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EXPORT_SYMBOL(mma9551_read_config_word);
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/**
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* mma9551_write_config_word() - write 1 config word
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* @client: I2C client
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* @app_id: Application ID
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* @reg: Application register
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* @val: Value to write
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*
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* Write one configuration word from the device using MMA955xL command format.
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* Commands to the MMA955xL platform consist of a write followed by one or
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* more reads.
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*
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* Locking note: This function must be called with the device lock held.
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* Locking is not handled inside the function. Callers should ensure they
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* serialize access to the HW.
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*
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* Returns: 0 on success, negative value on failure.
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*/
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int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
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u16 reg, u16 val)
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{
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__be16 v = cpu_to_be16(val);
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return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
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(u8 *) &v, 2, NULL, 0);
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}
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EXPORT_SYMBOL(mma9551_write_config_word);
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/**
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* mma9551_read_status_word() - read 1 status word
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* @client: I2C client
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@ -305,6 +368,107 @@ int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
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}
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EXPORT_SYMBOL(mma9551_read_status_word);
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/**
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* mma9551_read_config_words() - read multiple config words
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* @client: I2C client
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* @app_id: Application ID
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* @reg: Application register
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* @len: Length of array to read in bytes
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* @val: Array of words to read
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*
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* Read multiple configuration registers (word-sized registers).
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*
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* Locking note: This function must be called with the device lock held.
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* Locking is not handled inside the function. Callers should ensure they
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* serialize access to the HW.
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*
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* Returns: 0 on success, negative value on failure.
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*/
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int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
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u16 reg, u8 len, u16 *buf)
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{
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int ret, i;
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int len_words = len / sizeof(u16);
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__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
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ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
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reg, NULL, 0, (u8 *) be_buf, len);
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if (ret < 0)
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return ret;
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for (i = 0; i < len_words; i++)
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buf[i] = be16_to_cpu(be_buf[i]);
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return 0;
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}
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EXPORT_SYMBOL(mma9551_read_config_words);
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/**
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* mma9551_read_status_words() - read multiple status words
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* @client: I2C client
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* @app_id: Application ID
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* @reg: Application register
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* @len: Length of array to read in bytes
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* @val: Array of words to read
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*
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* Read multiple status registers (word-sized registers).
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*
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* Locking note: This function must be called with the device lock held.
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* Locking is not handled inside the function. Callers should ensure they
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* serialize access to the HW.
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*
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* Returns: 0 on success, negative value on failure.
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*/
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int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
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u16 reg, u8 len, u16 *buf)
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{
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int ret, i;
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int len_words = len / sizeof(u16);
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__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
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ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
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reg, NULL, 0, (u8 *) be_buf, len);
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if (ret < 0)
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return ret;
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for (i = 0; i < len_words; i++)
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buf[i] = be16_to_cpu(be_buf[i]);
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return 0;
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}
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EXPORT_SYMBOL(mma9551_read_status_words);
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/**
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* mma9551_write_config_words() - write multiple config words
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* @client: I2C client
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* @app_id: Application ID
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* @reg: Application register
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* @len: Length of array to write in bytes
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* @val: Array of words to write
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*
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* Write multiple configuration registers (word-sized registers).
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*
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* Locking note: This function must be called with the device lock held.
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* Locking is not handled inside the function. Callers should ensure they
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* serialize access to the HW.
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*
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* Returns: 0 on success, negative value on failure.
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*/
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int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
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u16 reg, u8 len, u16 *buf)
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{
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int i;
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int len_words = len / sizeof(u16);
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__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
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for (i = 0; i < len_words; i++)
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be_buf[i] = cpu_to_be16(buf[i]);
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return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG,
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reg, (u8 *) be_buf, len, NULL, 0);
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}
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EXPORT_SYMBOL(mma9551_write_config_words);
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/**
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* mma9551_update_config_bits() - update bits in register
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* @client: I2C client
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@ -609,6 +773,25 @@ int mma9551_read_accel_scale(int *val, int *val2)
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}
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EXPORT_SYMBOL(mma9551_read_accel_scale);
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/**
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* mma9551_app_reset() - reset application
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* @client: I2C client
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* @app_mask: Application to reset
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*
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* Reset the given application (using the Reset/Suspend/Clear
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* Control Application)
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*
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* Returns: 0 on success, negative value on failure.
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*/
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int mma9551_app_reset(struct i2c_client *client, u32 app_mask)
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{
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return mma9551_write_config_byte(client, MMA9551_APPID_RCS,
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MMA9551_RSC_RESET +
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MMA9551_RSC_OFFSET(app_mask),
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MMA9551_RSC_VAL(app_mask));
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}
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EXPORT_SYMBOL(mma9551_app_reset);
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MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
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MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");
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MODULE_LICENSE("GPL v2");
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@ -21,9 +21,13 @@
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#define MMA9551_APPID_AFE 0x06
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#define MMA9551_APPID_TILT 0x0B
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#define MMA9551_APPID_SLEEP_WAKE 0x12
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#define MMA9551_APPID_RESET 0x17
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#define MMA9551_APPID_PEDOMETER 0x15
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#define MMA9551_APPID_RCS 0x17
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#define MMA9551_APPID_NONE 0xff
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/* Reset/Suspend/Clear application app masks */
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#define MMA9551_RSC_PED BIT(21)
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#define MMA9551_AUTO_SUSPEND_DELAY_MS 2000
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enum mma9551_gpio_pin {
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@ -48,8 +52,18 @@ int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
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u16 reg, u8 val);
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int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
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u16 reg, u8 *val);
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int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
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u16 reg, u16 *val);
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int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
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u16 reg, u16 val);
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int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
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u16 reg, u16 *val);
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int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
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u16 reg, u8 len, u16 *buf);
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int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
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u16 reg, u8 len, u16 *buf);
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int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
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u16 reg, u8 len, u16 *buf);
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int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
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u16 reg, u8 mask, u8 val);
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int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
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@ -62,5 +76,6 @@ int mma9551_read_accel_chan(struct i2c_client *client,
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const struct iio_chan_spec *chan,
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int *val, int *val2);
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int mma9551_read_accel_scale(int *val, int *val2);
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int mma9551_app_reset(struct i2c_client *client, u32 app_mask);
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#endif /* _MMA9551_CORE_H_ */
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