Re: [PATCH 4/6] iio: mma8452: add support for MMA8652FC and MMA8653FC

[Jonathan Cameron <jic23@kernel.org>]

On 01/09/15 12:45, Martin Kepplinger wrote:
> MMA8652FC and MMA8653FC don't provide the transient interrupt source, so
> the motion interrupt source is used by providing a new iio_chan_spec
> definition, so that other supported devices are not affected by this.
> 
> Datasheets for the newly supported devices are available at Freescale's
> website:
> 
> http://cache.freescale.com/files/sensors/doc/data_sheet/MMA8652FC.pdf
> http://cache.freescale.com/files/sensors/doc/data_sheet/MMA8653FC.pdf
> 
> Signed-off-by: Martin Kepplinger <martin.kepplinger@theobroma-systems.com>
> Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Applied.
> ---
>  .../devicetree/bindings/iio/accel/mma8452.txt      |  4 +-
>  drivers/iio/accel/Kconfig                          |  2 +-
>  drivers/iio/accel/mma8452.c                        | 98 ++++++++++++++++++++--
>  3 files changed, 95 insertions(+), 9 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/accel/mma8452.txt b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
> index c3bc272..e3c3746 100644
> --- a/Documentation/devicetree/bindings/iio/accel/mma8452.txt
> +++ b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
> @@ -1,10 +1,12 @@
> -Freescale MMA8452Q or MMA8453Q triaxial accelerometer
> +Freescale MMA8452Q, MMA8453Q, MMA8652FC or MMA8653FC triaxial accelerometer
>  
>  Required properties:
>  
>    - compatible: should contain one of
>      * "fsl,mma8452"
>      * "fsl,mma8453"
> +    * "fsl,mma8652"
> +    * "fsl,mma8653"
>    - reg: the I2C address of the chip
>  
>  Optional properties:
> diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> index e4075a0..a37155d 100644
> --- a/drivers/iio/accel/Kconfig
> +++ b/drivers/iio/accel/Kconfig
> @@ -106,7 +106,7 @@ config MMA8452
>  	select IIO_TRIGGERED_BUFFER
>  	help
>  	  Say yes here to build support for the following Freescale 3-axis
> -	  accelerometers: MMA8452Q, MMA8453Q.
> +	  accelerometers: MMA8452Q, MMA8453Q, MMA8652FC, MMA8653FC.
>  
>  	  To compile this driver as a module, choose M here: the module
>  	  will be called mma8452.
> diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
> index 6b1a862..59b4455 100644
> --- a/drivers/iio/accel/mma8452.c
> +++ b/drivers/iio/accel/mma8452.c
> @@ -3,6 +3,8 @@
>   *
>   * MMA8452Q (12 bit)
>   * MMA8453Q (10 bit)
> + * MMA8652FC (12 bit)
> + * MMA8653FC (10 bit)
>   *
>   * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
>   *
> @@ -84,6 +86,8 @@
>  
>  #define  MMA8452_DEVICE_ID			0x2a
>  #define  MMA8453_DEVICE_ID			0x3a
> +#define MMA8652_DEVICE_ID			0x4a
> +#define MMA8653_DEVICE_ID			0x5a
>  
>  struct mma8452_data {
>  	struct i2c_client *client;
> @@ -791,6 +795,26 @@ static struct attribute_group mma8452_event_attribute_group = {
>  	.num_event_specs = ARRAY_SIZE(mma8452_transient_event), \
>  }
>  
> +#define MMA8652_CHANNEL(axis, idx, bits) { \
> +	.type = IIO_ACCEL, \
> +	.modified = 1, \
> +	.channel2 = IIO_MOD_##axis, \
> +	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
> +		BIT(IIO_CHAN_INFO_CALIBBIAS), \
> +	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
> +		BIT(IIO_CHAN_INFO_SCALE), \
> +	.scan_index = idx, \
> +	.scan_type = { \
> +		.sign = 's', \
> +		.realbits = (bits), \
> +		.storagebits = 16, \
> +		.shift = 16 - (bits), \
> +		.endianness = IIO_BE, \
> +	}, \
> +	.event_spec = mma8452_motion_event, \
> +	.num_event_specs = ARRAY_SIZE(mma8452_motion_event), \
> +}
> +
>  static const struct iio_chan_spec mma8452_channels[] = {
>  	MMA8452_CHANNEL(X, 0, 12),
>  	MMA8452_CHANNEL(Y, 1, 12),
> @@ -805,9 +829,25 @@ static const struct iio_chan_spec mma8453_channels[] = {
>  	IIO_CHAN_SOFT_TIMESTAMP(3),
>  };
>  
> +static const struct iio_chan_spec mma8652_channels[] = {
> +	MMA8652_CHANNEL(X, 0, 12),
> +	MMA8652_CHANNEL(Y, 1, 12),
> +	MMA8652_CHANNEL(Z, 2, 12),
> +	IIO_CHAN_SOFT_TIMESTAMP(3),
> +};
> +
> +static const struct iio_chan_spec mma8653_channels[] = {
> +	MMA8652_CHANNEL(X, 0, 10),
> +	MMA8652_CHANNEL(Y, 1, 10),
> +	MMA8652_CHANNEL(Z, 2, 10),
> +	IIO_CHAN_SOFT_TIMESTAMP(3),
> +};
> +
>  enum {
>  	mma8452,
>  	mma8453,
> +	mma8652,
> +	mma8653,
>  };
>  
>  static const struct mma_chip_info mma_chip_info_table[] = {
> @@ -850,6 +890,38 @@ static const struct mma_chip_info mma_chip_info_table[] = {
>  		.ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
>  		.ev_count = MMA8452_TRANSIENT_COUNT,
>  	},
> +	[mma8652] = {
> +		.chip_id = MMA8652_DEVICE_ID,
> +		.channels = mma8652_channels,
> +		.num_channels = ARRAY_SIZE(mma8652_channels),
> +		.mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
> +		.ev_cfg = MMA8452_FF_MT_CFG,
> +		.ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
> +		.ev_cfg_chan_shift = 3,
> +		.ev_src = MMA8452_FF_MT_SRC,
> +		.ev_src_xe = MMA8452_FF_MT_SRC_XHE,
> +		.ev_src_ye = MMA8452_FF_MT_SRC_YHE,
> +		.ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
> +		.ev_ths = MMA8452_FF_MT_THS,
> +		.ev_ths_mask = MMA8452_FF_MT_THS_MASK,
> +		.ev_count = MMA8452_FF_MT_COUNT,
> +	},
> +	[mma8653] = {
> +		.chip_id = MMA8653_DEVICE_ID,
> +		.channels = mma8653_channels,
> +		.num_channels = ARRAY_SIZE(mma8653_channels),
> +		.mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
> +		.ev_cfg = MMA8452_FF_MT_CFG,
> +		.ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
> +		.ev_cfg_chan_shift = 3,
> +		.ev_src = MMA8452_FF_MT_SRC,
> +		.ev_src_xe = MMA8452_FF_MT_SRC_XHE,
> +		.ev_src_ye = MMA8452_FF_MT_SRC_YHE,
> +		.ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
> +		.ev_ths = MMA8452_FF_MT_THS,
> +		.ev_ths_mask = MMA8452_FF_MT_THS_MASK,
> +		.ev_count = MMA8452_FF_MT_COUNT,
> +	},
>  };
>  
>  static struct attribute *mma8452_attributes[] = {
> @@ -972,6 +1044,8 @@ static int mma8452_reset(struct i2c_client *client)
>  static const struct of_device_id mma8452_dt_ids[] = {
>  	{ .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] },
>  	{ .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] },
> +	{ .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] },
> +	{ .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, mma8452_dt_ids);
> @@ -984,13 +1058,6 @@ static int mma8452_probe(struct i2c_client *client,
>  	int ret;
>  	const struct of_device_id *match;
>  
> -	ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
> -	if (ret < 0)
> -		return ret;
> -
> -	if (ret != MMA8452_DEVICE_ID && ret != MMA8453_DEVICE_ID)
> -		return -ENODEV;
> -
>  	match = of_match_device(mma8452_dt_ids, &client->dev);
>  	if (!match) {
>  		dev_err(&client->dev, "unknown device model\n");
> @@ -1006,6 +1073,21 @@ static int mma8452_probe(struct i2c_client *client,
>  	mutex_init(&data->lock);
>  	data->chip_info = match->data;
>  
> +	ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
> +	if (ret < 0)
> +		return ret;
> +
> +	switch (ret) {
> +	case MMA8452_DEVICE_ID:
> +	case MMA8453_DEVICE_ID:
> +	case MMA8652_DEVICE_ID:
> +	case MMA8653_DEVICE_ID:
> +		if (ret == data->chip_info->chip_id)
> +			break;
> +	default:
> +		return -ENODEV;
> +	}
> +
>  	dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n",
>  		 match->compatible, data->chip_info->chip_id);
>  
> @@ -1138,6 +1220,8 @@ static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume);
>  static const struct i2c_device_id mma8452_id[] = {
>  	{ "mma8452", mma8452 },
>  	{ "mma8453", mma8453 },
> +	{ "mma8652", mma8652 },
> +	{ "mma8653", mma8653 },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(i2c, mma8452_id);
>