On 16 March 2018 00:31:53 GMT+05:30, Shreeya Patel <shreeya.patel23498@xxxxxxxxx> wrote:
>On Sat, 2018-03-10 at 15:57 +0000, Jonathan Cameron wrote:
>
>Hi Jonathan,
>
>> On Sat, 10 Mar 2018 15:50:23 +0530
>> Shreeya Patel <shreeya.patel23498@xxxxxxxxx> wrote:
>>
>> >
>> > Move the adis16209 driver out of staging directory and merge to the
>> > mainline IIO subsystem.
>> >
>> > Signed-off-by: Shreeya Patel <shreeya.patel23498@xxxxxxxxx>
>> As this has a clear dependency on the previous patch, please put them
>> in the same series for the next version. That way I won't miss one!
>>
>> This also doesn't actually seem to have all the patches in place.
>> The sign extend one is definitely missing for some reason.
>>
>> One question on the ABI choice of X for the rotation axis.
>> I think the logical choice is actually Z but would like to know what
>> you and others think.
>>
>> All existing users of IIO_ROT (outside staging) have been
>> magnetometer
>> where we don't have an axis, but rather a magnetic reference frame or
>> a quaternion output which includes all the axes.
>>
>> Jonathan
>>
>> >
>> > ---
>> >
>> > Changes in v2
>> > -Re-send the patch after having some cleanups in the
>> > file included in this patch.
>> >
>> > drivers/iio/accel/Kconfig | 12 ++
>> > drivers/iio/accel/Makefile | 1 +
>> > drivers/iio/accel/adis16209.c | 329
>> > ++++++++++++++++++++++++++++++++++
>> > drivers/staging/iio/accel/Kconfig | 12 --
>> > drivers/staging/iio/accel/Makefile | 1 -
>> > drivers/staging/iio/accel/adis16209.c | 329 ----------------------
>> > ------------
>> > 6 files changed, 342 insertions(+), 342 deletions(-)
>> > create mode 100644 drivers/iio/accel/adis16209.c
>> > delete mode 100644 drivers/staging/iio/accel/adis16209.c
>> >
>> > diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
>> > index c6d9517..f95f43c 100644
>> > --- a/drivers/iio/accel/Kconfig
>> > +++ b/drivers/iio/accel/Kconfig
>> > @@ -5,6 +5,18 @@
>> >
>> > menu "Accelerometers"
>> >
>> > +config ADIS16209
>> > + tristate "Analog Devices ADIS16209 Dual-Axis Digital
>> > Inclinometer and Accelerometer"
>> > + depends on SPI
>> > + select IIO_ADIS_LIB
>> > + select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
>> > + help
>> > + Say Y here to build support for Analog Devices adis16209
>> > dual-axis digital inclinometer
>> > + and accelerometer.
>> > +
>> > + To compile this driver as a module, say M here: the
>> > module will be
>> > + called adis16209.
>> > +
>> > config ADXL345
>> > tristate
>> >
>> > diff --git a/drivers/iio/accel/Makefile
>> > b/drivers/iio/accel/Makefile
>> > index 368aedb..40861b9 100644
>> > --- a/drivers/iio/accel/Makefile
>> > +++ b/drivers/iio/accel/Makefile
>> > @@ -4,6 +4,7 @@
>> > #
>> >
>> > # When adding new entries keep the list in alphabetical order
>> > +obj-$(CONFIG_ADIS16209) += adis16209.o
>> > obj-$(CONFIG_ADXL345) += adxl345_core.o
>> > obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o
>> > obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o
>> > diff --git a/drivers/iio/accel/adis16209.c
>> > b/drivers/iio/accel/adis16209.c
>> > new file mode 100644
>> > index 0000000..ed2e89f
>> > --- /dev/null
>> > +++ b/drivers/iio/accel/adis16209.c
>> > @@ -0,0 +1,329 @@
>> > +/*
>> > + * ADIS16209 Dual-Axis Digital Inclinometer and Accelerometer
>> > + *
>> > + * Copyright 2010 Analog Devices Inc.
>> > + *
>> > + * Licensed under the GPL-2 or later.
>> > + */
>> > +
>> > +#include <linux/delay.h>
>> > +#include <linux/device.h>
>> > +#include <linux/kernel.h>
>> > +#include <linux/list.h>
>> > +#include <linux/module.h>
>> > +#include <linux/spi/spi.h>
>> > +#include <linux/slab.h>
>> > +#include <linux/sysfs.h>
>> > +
>> > +#include <linux/iio/iio.h>
>> > +#include <linux/iio/sysfs.h>
>> > +#include <linux/iio/buffer.h>
>> > +#include <linux/iio/imu/adis.h>
>> > +
>> > +#define ADIS16209_STARTUP_DELAY_MS 220
>> > +#define ADIS16209_FLASH_CNT_REG 0x00
>> > +
>> > +/* Data Output Register Definitions */
>> > +#define ADIS16209_SUPPLY_OUT_REG 0x02
>> > +#define ADIS16209_XACCL_OUT_REG 0x04
>> > +#define ADIS16209_YACCL_OUT_REG 0x06
>> > +/* Output, auxiliary ADC input */
>> > +#define ADIS16209_AUX_ADC_REG 0x08
>> > +/* Output, temperature */
>> > +#define ADIS16209_TEMP_OUT_REG 0x0A
>> > +/* Output, +/- 90 degrees X-axis inclination */
>> > +#define ADIS16209_XINCL_OUT_REG 0x0C
>> > +#define ADIS16209_YINCL_OUT_REG 0x0E
>> > +/* Output, +/-180 vertical rotational position */
>> > +#define ADIS16209_ROT_OUT_REG 0x10
>> > +
>> > +/*
>> > + * Calibration Register Definitions.
>> > + * Acceleration, inclination or rotation offset null.
>> > + */
>> > +#define ADIS16209_XACCL_NULL_REG 0x12
>> > +#define ADIS16209_YACCL_NULL_REG 0x14
>> > +#define ADIS16209_XINCL_NULL_REG 0x16
>> > +#define ADIS16209_YINCL_NULL_REG 0x18
>> > +#define ADIS16209_ROT_NULL_REG 0x1A
>> > +
>> > +/* Alarm Register Definitions */
>> > +#define ADIS16209_ALM_MAG1_REG 0x20
>> > +#define ADIS16209_ALM_MAG2_REG 0x22
>> > +#define ADIS16209_ALM_SMPL1_REG 0x24
>> > +#define ADIS16209_ALM_SMPL2_REG 0x26
>> > +#define ADIS16209_ALM_CTRL_REG 0x28
>> > +
>> > +#define ADIS16209_AUX_DAC_REG 0x30
>> > +#define ADIS16209_GPIO_CTRL_REG 0x32
>> > +#define ADIS16209_SMPL_PRD_REG 0x36
>> > +#define ADIS16209_AVG_CNT_REG 0x38
>> > +#define ADIS16209_SLP_CNT_REG 0x3A
>> > +
>> > +#define ADIS16209_MSC_CTRL_REG 0x34
>> > +#define ADIS16209_MSC_CTRL_PWRUP_SELF_TEST BIT(10)
>> > +#define ADIS16209_MSC_CTRL_SELF_TEST_EN BIT(8)
>> > +#define ADIS16209_MSC_CTRL_DATA_RDY_EN BIT(2)
>> > +/* Data-ready polarity: 1 = active high, 0 = active low */
>> > +#define ADIS16209_MSC_CTRL_ACTIVE_HIGH BIT(1)
>> > +#define ADIS16209_MSC_CTRL_DATA_RDY_DIO2 BIT(0)
>> > +
>> > +#define ADIS16209_STAT_REG 0x3C
>> > +#define ADIS16209_STAT_ALARM2 BIT(9)
>> > +#define ADIS16209_STAT_ALARM1 BIT(8)
>> > +#define ADIS16209_STAT_SELFTEST_FAIL_BIT 5
>> > +#define ADIS16209_STAT_SPI_FAIL_BIT 3
>> > +#define ADIS16209_STAT_FLASH_UPT_FAIL_BIT 2
>> > +/* Power supply above 3.625 V */
>> > +#define ADIS16209_STAT_POWER_HIGH_BIT 1
>> > +/* Power supply below 3.15 V */
>> > +#define ADIS16209_STAT_POWER_LOW_BIT 0
>> > +
>> > +#define ADIS16209_CMD_REG 0x3E
>> > +#define ADIS16209_CMD_SW_RESET BIT(7)
>> > +#define ADIS16209_CMD_CLEAR_STAT BIT(4)
>> > +#define ADIS16209_CMD_FACTORY_CAL BIT(1)
>> > +
>> > +#define ADIS16209_ERROR_ACTIVE BIT(14)
>> > +
>> > +enum adis16209_scan {
>> > + ADIS16209_SCAN_SUPPLY,
>> > + ADIS16209_SCAN_ACC_X,
>> > + ADIS16209_SCAN_ACC_Y,
>> > + ADIS16209_SCAN_AUX_ADC,
>> > + ADIS16209_SCAN_TEMP,
>> > + ADIS16209_SCAN_INCLI_X,
>> > + ADIS16209_SCAN_INCLI_Y,
>> > + ADIS16209_SCAN_ROT,
>> > +};
>> > +
>> > +static const u8 adis16209_addresses[8][1] = {
>> > + [ADIS16209_SCAN_SUPPLY] = { },
>> > + [ADIS16209_SCAN_AUX_ADC] = { },
>> > + [ADIS16209_SCAN_ACC_X] = { ADIS16209_XACCL_NULL_REG },
>> > + [ADIS16209_SCAN_ACC_Y] = { ADIS16209_YACCL_NULL_REG },
>> > + [ADIS16209_SCAN_INCLI_X] = { ADIS16209_XINCL_NULL_REG },
>> > + [ADIS16209_SCAN_INCLI_Y] = { ADIS16209_YINCL_NULL_REG },
>> > + [ADIS16209_SCAN_ROT] = { },
>> > + [ADIS16209_SCAN_TEMP] = { },
>> > +};
>> > +
>> > +static int adis16209_write_raw(struct iio_dev *indio_dev,
>> > + struct iio_chan_spec const *chan,
>> > + int val,
>> > + int val2,
>> > + long mask)
>> > +{
>> > + struct adis *st = iio_priv(indio_dev);
>> > + int bits;
>> > + s16 val16;
>> > + u8 addr;
>> > +
>> > + switch (mask) {
>> > + case IIO_CHAN_INFO_CALIBBIAS:
>> > + switch (chan->type) {
>> > + case IIO_ACCEL:
>> > + case IIO_INCLI:
>> > + bits = 14;
>> > + break;
>> > + default:
>> > + return -EINVAL;
>> > + }
>> > + val16 = val & ((1 << bits) - 1);
>> > + addr = adis16209_addresses[chan->scan_index][0];
>> > + return adis_write_reg_16(st, addr, val16);
>> > + }
>> > + return -EINVAL;
>> > +}
>> > +
>> > +static int adis16209_read_raw(struct iio_dev *indio_dev,
>> > + struct iio_chan_spec const *chan,
>> > + int *val, int *val2,
>> > + long mask)
>> > +{
>> > + struct adis *st = iio_priv(indio_dev);
>> > + int ret;
>> > + int bits;
>> > + u8 addr;
>> > + s16 val16;
>> > +
>> > + switch (mask) {
>> > + case IIO_CHAN_INFO_RAW:
>> > + return adis_single_conversion(indio_dev, chan,
>> > + ADIS16209_ERROR_ACTIVE, val);
>> > + case IIO_CHAN_INFO_SCALE:
>> > + switch (chan->type) {
>> > + case IIO_VOLTAGE:
>> > + *val = 0;
>> > + if (chan->channel == 0)
>> > + *val2 = 305180; /* 0.30518 mV */
>> > + else
>> > + *val2 = 610500; /* 0.6105 mV */
>> > + return IIO_VAL_INT_PLUS_MICRO;
>> > + case IIO_TEMP:
>> > + *val = -470;
>> > + *val2 = 0;
>> > + return IIO_VAL_INT_PLUS_MICRO;
>> > + case IIO_ACCEL:
>> > + /*
>> > + * IIO base unit for sensitivity of
>> > accelerometer
>> > + * is milli g.
>> > + * 1 LSB represents 0.244 mg.
>> > + */
>> > + *val = 0;
>> > + *val2 = IIO_G_TO_M_S_2(244140);
>> > + return IIO_VAL_INT_PLUS_NANO;
>> > + case IIO_INCLI:
>> > + case IIO_ROT:
>> > + /*
>> > + * IIO base units for rotation are
>> > degrees.
>> > + * 1 LSB represents 0.025 milli degrees.
>> > + */
>> > + *val = 0;
>> > + *val2 = 25000;
>> > + return IIO_VAL_INT_PLUS_MICRO;
>> > + default:
>> > + return -EINVAL;
>> > + }
>> > + break;
>> > + case IIO_CHAN_INFO_OFFSET:
>> > + /*
>> > + * The raw ADC value is 0x4FE when the temperature
>> > + * is 45 degrees and the scale factor per milli
>> > + * degree celcius is -470.
>> > + */
>> > + *val = 25000 / -470 - 0x4FE;
>> > + return IIO_VAL_INT;
>> > + case IIO_CHAN_INFO_CALIBBIAS:
>> > + switch (chan->type) {
>> > + case IIO_ACCEL:
>> > + bits = 14;
>> > + break;
>> > + default:
>> > + return -EINVAL;
>> > + }
>> > + addr = adis16209_addresses[chan->scan_index][0];
>> > + ret = adis_read_reg_16(st, addr, &val16);
>> > + if (ret)
>> > + return ret;
>> > + val16 &= (1 << bits) - 1;
>> > + val16 = (s16)(val16 << (16 - bits)) >> (16 -
>> > bits);
>> > + *val = val16;
>> Something odd here as this isn't the current code - doesn't have the
>> sign extend patch in place.
>>
>> >
>> > + return IIO_VAL_INT;
>> > + }
>> > + return -EINVAL;
>> > +}
>> > +
>> > +static const struct iio_chan_spec adis16209_channels[] = {
>> > + ADIS_SUPPLY_CHAN(ADIS16209_SUPPLY_OUT_REG,
>> > ADIS16209_SCAN_SUPPLY,
>> > + 0, 14),
>> > + ADIS_TEMP_CHAN(ADIS16209_TEMP_OUT_REG,
>> > ADIS16209_SCAN_TEMP, 0, 12),
>> > + ADIS_ACCEL_CHAN(X, ADIS16209_XACCL_OUT_REG,
>> > ADIS16209_SCAN_ACC_X,
>> > + BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
>> > + ADIS_ACCEL_CHAN(Y, ADIS16209_YACCL_OUT_REG,
>> > ADIS16209_SCAN_ACC_Y,
>> > + BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
>> > + ADIS_AUX_ADC_CHAN(ADIS16209_AUX_ADC_REG,
>> > ADIS16209_SCAN_AUX_ADC, 0, 12),
>> > + ADIS_INCLI_CHAN(X, ADIS16209_XINCL_OUT_REG,
>> > ADIS16209_SCAN_INCLI_X,
>> > + 0, 0, 14),
>> > + ADIS_INCLI_CHAN(Y, ADIS16209_YINCL_OUT_REG,
>> > ADIS16209_SCAN_INCLI_Y,
>> > + 0, 0, 14),
>> > + ADIS_ROT_CHAN(X, ADIS16209_ROT_OUT_REG,
>> > ADIS16209_SCAN_ROT, 0, 0, 14),
>> This raises an interesting question. How do we define rotation axes?
>> I would assume it was rotation about the axis, as such I think the
>> correct
>> axis for this is Z.
>>
>> However, then we consider the two inclination axis. Again fiddly. I
>> suppose
>> it is inclination 'from' an axis, but in what plane? I guess x and y
>> is about as good as we can do on those ones with the assumption they
>> are aligned to perpendicular to the vertical.
>
>I went through some datasheets to find out more about the single axis
>tilt inclination and double axis tilt inclination.
I meant *dual* axis here and even below.
>Rotational angle is provided by double axis tilt theory.
>As the name tells us that it is dual axis i.e. we are considering X and
>Y axis here so maybe this is why we are not taking Z axis here.
>Angle of rotation is taken from the X axis.
>
>I am attaching some screenshots about more information on this.
>Maybe they can be helpful.
>
>Also If I have understood something wrong then please do correct
>me :)
>
>Thanks
>
>
>>
>> >
>> > + IIO_CHAN_SOFT_TIMESTAMP(8)
>> > +};
>> > +
>> > +static const struct iio_info adis16209_info = {
>> > + .read_raw = adis16209_read_raw,
>> > + .write_raw = adis16209_write_raw,
>> > + .update_scan_mode = adis_update_scan_mode,
>> > +};
>> > +
>> > +static const char * const adis16209_status_error_msgs[] = {
>> > + [ADIS16209_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
>> > + [ADIS16209_STAT_SPI_FAIL_BIT] = "SPI failure",
>> > + [ADIS16209_STAT_FLASH_UPT_FAIL_BIT] = "Flash update
>> > failed",
>> > + [ADIS16209_STAT_POWER_HIGH_BIT] = "Power supply above
>> > 3.625V",
>> > + [ADIS16209_STAT_POWER_LOW_BIT] = "Power supply below
>> > 3.15V",
>> > +};
>> > +
>> > +static const struct adis_data adis16209_data = {
>> > + .read_delay = 30,
>> > + .msc_ctrl_reg = ADIS16209_MSC_CTRL_REG,
>> > + .glob_cmd_reg = ADIS16209_CMD_REG,
>> > + .diag_stat_reg = ADIS16209_STAT_REG,
>> > +
>> > + .self_test_mask = ADIS16209_MSC_CTRL_SELF_TEST_EN,
>> > + .self_test_no_autoclear = true,
>> > + .startup_delay = ADIS16209_STARTUP_DELAY_MS,
>> > +
>> > + .status_error_msgs = adis16209_status_error_msgs,
>> > + .status_error_mask = BIT(ADIS16209_STAT_SELFTEST_FAIL_BIT)
>> > |
>> > + BIT(ADIS16209_STAT_SPI_FAIL_BIT) |
>> > + BIT(ADIS16209_STAT_FLASH_UPT_FAIL_BIT) |
>> > + BIT(ADIS16209_STAT_POWER_HIGH_BIT) |
>> > + BIT(ADIS16209_STAT_POWER_LOW_BIT),
>> > +};
>> > +
>> > +static int adis16209_probe(struct spi_device *spi)
>> > +{
>> > + int ret;
>> > + struct adis *st;
>> > + struct iio_dev *indio_dev;
>> It's not one I personally feel strongly about but when there is no
>> reason not to do it, reverse Christmas tree ordering is preferred for
>> variable declarations.
>>
>> >
>> > +
>> > + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
>> > + if (!indio_dev)
>> > + return -ENOMEM;
>> Blank line here.
>>
>> >
>> > + st = iio_priv(indio_dev);
>> > + spi_set_drvdata(spi, indio_dev);
>> > +
>> > + indio_dev->name = spi->dev.driver->name;
>> > + indio_dev->dev.parent = &spi->dev;
>> > + indio_dev->info = &adis16209_info;
>> > + indio_dev->channels = adis16209_channels;
>> > + indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
>> > + indio_dev->modes = INDIO_DIRECT_MODE;
>> > +
>> > + ret = adis_init(st, indio_dev, spi, &adis16209_data);
>> > + if (ret)
>> > + return ret;
>> Blank line here.
>>
>> >
>> > + ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
>> > + if (ret)
>> > + return ret;
>> > +
>> > + ret = adis_initial_startup(st);
>> > + if (ret)
>> > + goto error_cleanup_buffer_trigger;
>> > + ret = iio_device_register(indio_dev);
>> > + if (ret)
>> > + goto error_cleanup_buffer_trigger;
>> > +
>> > + return 0;
>> > +
>> > +error_cleanup_buffer_trigger:
>> > + adis_cleanup_buffer_and_trigger(st, indio_dev);
>> > + return ret;
>> > +}
>> > +
>> > +static int adis16209_remove(struct spi_device *spi)
>> > +{
>> > + struct iio_dev *indio_dev = spi_get_drvdata(spi);
>> > + struct adis *st = iio_priv(indio_dev);
>> > +
>> > + iio_device_unregister(indio_dev);
>> > + adis_cleanup_buffer_and_trigger(st, indio_dev);
>> > +
>> > + return 0;
>> > +}
>> > +
>> > +static struct spi_driver adis16209_driver = {
>> > + .driver = {
>> > + .name = "adis16209",
>> > + },
>> > + .probe = adis16209_probe,
>> > + .remove = adis16209_remove,
>> > +};
>> > +module_spi_driver(adis16209_driver);
>> > +
>> > +MODULE_AUTHOR("Barry Song <21cnbao@xxxxxxxxx>");
>> > +MODULE_DESCRIPTION("Analog Devices ADIS16209 Dual-Axis Digital
>> > Inclinometer and Accelerometer");
>> > +MODULE_LICENSE("GPL v2");
>> > +MODULE_ALIAS("spi:adis16209");]
>> <snip>
--
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