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@xxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Christoph Muellner <christoph.muellner@xxxxxxxxxxxxxxxxxxxxx> --- .../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@xxxxxxxxxx> * @@ -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); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
