Re: [PATCH 2/6] iio: mma8452: add support for MMA8453Q accelerometer chip

[Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

On 01/09/15 12:45, Martin Kepplinger wrote:
> This adds support for the 10 bit version if Freescale's accelerometers
> of this series. The datasheet is available at Freescale's website:
> 
> http://cache.freescale.com/files/sensors/doc/data_sheet/MMA8453Q.pdf
> 
> It creates a devicetree bindings file to document the new functionality
> and removes the driver from the trivial-devices list.
> 
> Signed-off-by: Martin Kepplinger <martin.kepplinger-SN7IsUiht6C/RdPyistoZJqQE7yCjDx5@public.gmane.org>
> Signed-off-by: Christoph Muellner <christoph.muellner-SN7IsUiht6C/RdPyistoZJqQE7yCjDx5@public.gmane.org>
Applied.
> ---
>  .../devicetree/bindings/i2c/trivial-devices.txt    |  1 -
>  .../devicetree/bindings/iio/accel/mma8452.txt      | 22 +++++++++++++
>  drivers/iio/accel/Kconfig                          |  6 ++--
>  drivers/iio/accel/mma8452.c                        | 37 ++++++++++++++++++++--
>  4 files changed, 59 insertions(+), 7 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/iio/accel/mma8452.txt
> 
> diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
> index d77d412..a50e56d 100644
> --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
> +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
> @@ -54,7 +54,6 @@ epson,rx8581		I2C-BUS INTERFACE REAL TIME CLOCK MODULE
>  fsl,mag3110		MAG3110: Xtrinsic High Accuracy, 3D Magnetometer
>  fsl,mc13892		MC13892: Power Management Integrated Circuit (PMIC) for i.MX35/51
>  fsl,mma8450		MMA8450Q: Xtrinsic Low-power, 3-axis Xtrinsic Accelerometer
> -fsl,mma8452		MMA8452Q: 3-axis 12-bit / 8-bit Digital Accelerometer
>  fsl,mpr121		MPR121: Proximity Capacitive Touch Sensor Controller
>  fsl,sgtl5000		SGTL5000: Ultra Low-Power Audio Codec
>  gmt,g751		G751: Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
> diff --git a/Documentation/devicetree/bindings/iio/accel/mma8452.txt b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
> new file mode 100644
> index 0000000..c3bc272
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
> @@ -0,0 +1,22 @@
> +Freescale MMA8452Q or MMA8453Q triaxial accelerometer
> +
> +Required properties:
> +
> +  - compatible: should contain one of
> +    * "fsl,mma8452"
> +    * "fsl,mma8453"
> +  - reg: the I2C address of the chip
> +
> +Optional properties:
> +
> +  - interrupt-parent: should be the phandle for the interrupt controller
> +  - interrupts: interrupt mapping for GPIO IRQ
> +
> +Example:
> +
> +	mma8453fc@1d {
> +		compatible = "fsl,mma8453";
> +		reg = <0x1d>;
> +		interrupt-parent = <&gpio1>;
> +		interrupts = <5 0>;
> +	};
> diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> index a59047d..e4075a0 100644
> --- a/drivers/iio/accel/Kconfig
> +++ b/drivers/iio/accel/Kconfig
> @@ -100,13 +100,13 @@ config KXCJK1013
>  	  be called kxcjk-1013.
>  
>  config MMA8452
> -	tristate "Freescale MMA8452Q Accelerometer Driver"
> +	tristate "Freescale MMA8452Q and similar Accelerometers Driver"
>  	depends on I2C
>  	select IIO_BUFFER
>  	select IIO_TRIGGERED_BUFFER
>  	help
> -	  Say yes here to build support for the Freescale MMA8452Q 3-axis
> -	  accelerometer.
> +	  Say yes here to build support for the following Freescale 3-axis
> +	  accelerometers: MMA8452Q, MMA8453Q.
>  
>  	  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 f28428fa..7b2ab17 100644
> --- a/drivers/iio/accel/mma8452.c
> +++ b/drivers/iio/accel/mma8452.c
> @@ -1,5 +1,8 @@
>  /*
> - * mma8452.c - Support for Freescale MMA8452Q 3-axis 12-bit accelerometer
> + * mma8452.c - Support for following Freescale 3-axis accelerometers:
> + *
> + * MMA8452Q (12 bit)
> + * MMA8453Q (10 bit)
>   *
>   * Copyright 2014 Peter Meerwald <pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org>
>   *
> @@ -26,7 +29,7 @@
>  
>  #define MMA8452_STATUS				0x00
>  #define  MMA8452_STATUS_DRDY			(BIT(2) | BIT(1) | BIT(0))
> -#define MMA8452_OUT_X				0x01 /* MSB first, 12-bit  */
> +#define MMA8452_OUT_X				0x01 /* MSB first */
>  #define MMA8452_OUT_Y				0x03
>  #define MMA8452_OUT_Z				0x05
>  #define MMA8452_INT_SRC				0x0c
> @@ -69,6 +72,7 @@
>  #define  MMA8452_INT_TRANS			BIT(5)
>  
>  #define  MMA8452_DEVICE_ID			0x2a
> +#define  MMA8453_DEVICE_ID			0x3a
>  
>  struct mma8452_data {
>  	struct i2c_client *client;
> @@ -768,8 +772,16 @@ static const struct iio_chan_spec mma8452_channels[] = {
>  	IIO_CHAN_SOFT_TIMESTAMP(3),
>  };
>  
> +static const struct iio_chan_spec mma8453_channels[] = {
> +	MMA8452_CHANNEL(X, 0, 10),
> +	MMA8452_CHANNEL(Y, 1, 10),
> +	MMA8452_CHANNEL(Z, 2, 10),
> +	IIO_CHAN_SOFT_TIMESTAMP(3),
> +};
> +
>  enum {
>  	mma8452,
> +	mma8453,
>  };
>  
>  static const struct mma_chip_info mma_chip_info_table[] = {
> @@ -796,6 +808,22 @@ static const struct mma_chip_info mma_chip_info_table[] = {
>  		.ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
>  		.ev_count = MMA8452_TRANSIENT_COUNT,
>  	},
> +	[mma8453] = {
> +		.chip_id = MMA8453_DEVICE_ID,
> +		.channels = mma8453_channels,
> +		.num_channels = ARRAY_SIZE(mma8453_channels),
> +		.mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
> +		.ev_cfg = MMA8452_TRANSIENT_CFG,
> +		.ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
> +		.ev_cfg_chan_shift = 1,
> +		.ev_src = MMA8452_TRANSIENT_SRC,
> +		.ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
> +		.ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
> +		.ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
> +		.ev_ths = MMA8452_TRANSIENT_THS,
> +		.ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
> +		.ev_count = MMA8452_TRANSIENT_COUNT,
> +	},
>  };
>  
>  static struct attribute *mma8452_attributes[] = {
> @@ -917,6 +945,7 @@ 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] },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, mma8452_dt_ids);
> @@ -932,7 +961,8 @@ static int mma8452_probe(struct i2c_client *client,
>  	ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
>  	if (ret < 0)
>  		return ret;
> -	if (ret != MMA8452_DEVICE_ID)
> +
> +	if (ret != MMA8452_DEVICE_ID && ret != MMA8453_DEVICE_ID)
>  		return -ENODEV;
>  
>  	match = of_match_device(mma8452_dt_ids, &client->dev);
> @@ -1079,6 +1109,7 @@ static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume);
>  
>  static const struct i2c_device_id mma8452_id[] = {
>  	{ "mma8452", mma8452 },
> +	{ "mma8453", mma8453 },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(i2c, mma8452_id);
>