diff options
Diffstat (limited to 'drivers/staging/iio/impedance-analyzer/ad5933.c')
| -rw-r--r-- | drivers/staging/iio/impedance-analyzer/ad5933.c | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c index 3134295f014f..af0bcf95ee8a 100644 --- a/drivers/staging/iio/impedance-analyzer/ad5933.c +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c @@ -1,27 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0 /* * AD5933 AD5934 Impedance Converter, Network Analyzer * * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. */ -#include <linux/interrupt.h> +#include <linux/clk.h> +#include <linux/delay.h> #include <linux/device.h> -#include <linux/kernel.h> -#include <linux/sysfs.h> +#include <linux/err.h> #include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/regulator/consumer.h> +#include <linux/sysfs.h> #include <linux/types.h> -#include <linux/err.h> -#include <linux/delay.h> -#include <linux/module.h> -#include <linux/clk.h> -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> +#include <linux/iio/iio.h> #include <linux/iio/kfifo_buf.h> +#include <linux/iio/sysfs.h> /* AD5933/AD5934 Registers */ #define AD5933_REG_CONTROL_HB 0x80 /* R/W, 1 byte */ @@ -284,7 +283,7 @@ static ssize_t ad5933_show_frequency(struct device *dev, freqreg = be32_to_cpu(dat.d32) & 0xFFFFFF; freqreg = (u64)freqreg * (u64)(st->mclk_hz / 4); - do_div(freqreg, 1 << 27); + do_div(freqreg, BIT(27)); return sprintf(buf, "%d\n", (int)freqreg); } @@ -316,12 +315,12 @@ static ssize_t ad5933_store_frequency(struct device *dev, return ret ? ret : len; } -static IIO_DEVICE_ATTR(out_voltage0_freq_start, 0644, +static IIO_DEVICE_ATTR(out_altvoltage0_frequency_start, 0644, ad5933_show_frequency, ad5933_store_frequency, AD5933_REG_FREQ_START); -static IIO_DEVICE_ATTR(out_voltage0_freq_increment, 0644, +static IIO_DEVICE_ATTR(out_altvoltage0_frequency_increment, 0644, ad5933_show_frequency, ad5933_store_frequency, AD5933_REG_FREQ_INC); @@ -420,7 +419,7 @@ static ssize_t ad5933_store(struct device *dev, if (val > 1022) val = (val >> 2) | (3 << 9); else if (val > 511) - val = (val >> 1) | (1 << 9); + val = (val >> 1) | BIT(9); dat = cpu_to_be16(val); ret = ad5933_i2c_write(st->client, @@ -444,12 +443,12 @@ static ssize_t ad5933_store(struct device *dev, return ret ? ret : len; } -static IIO_DEVICE_ATTR(out_voltage0_scale, 0644, +static IIO_DEVICE_ATTR(out_altvoltage0_raw, 0644, ad5933_show, ad5933_store, AD5933_OUT_RANGE); -static IIO_DEVICE_ATTR(out_voltage0_scale_available, 0444, +static IIO_DEVICE_ATTR(out_altvoltage0_scale_available, 0444, ad5933_show, NULL, AD5933_OUT_RANGE_AVAIL); @@ -464,28 +463,29 @@ static IIO_DEVICE_ATTR(in_voltage0_scale_available, 0444, NULL, AD5933_IN_PGA_GAIN_AVAIL); -static IIO_DEVICE_ATTR(out_voltage0_freq_points, 0644, +static IIO_DEVICE_ATTR(out_altvoltage0_frequency_points, 0644, ad5933_show, ad5933_store, AD5933_FREQ_POINTS); -static IIO_DEVICE_ATTR(out_voltage0_settling_cycles, 0644, +static IIO_DEVICE_ATTR(out_altvoltage0_settling_cycles, 0644, ad5933_show, ad5933_store, AD5933_OUT_SETTLING_CYCLES); -/* note: +/* + * note: * ideally we would handle the scale attributes via the iio_info * (read|write)_raw methods, however this part is a untypical since we * don't create dedicated sysfs channel attributes for out0 and in0. */ static struct attribute *ad5933_attributes[] = { - &iio_dev_attr_out_voltage0_scale.dev_attr.attr, - &iio_dev_attr_out_voltage0_scale_available.dev_attr.attr, - &iio_dev_attr_out_voltage0_freq_start.dev_attr.attr, - &iio_dev_attr_out_voltage0_freq_increment.dev_attr.attr, - &iio_dev_attr_out_voltage0_freq_points.dev_attr.attr, - &iio_dev_attr_out_voltage0_settling_cycles.dev_attr.attr, + &iio_dev_attr_out_altvoltage0_raw.dev_attr.attr, + &iio_dev_attr_out_altvoltage0_scale_available.dev_attr.attr, + &iio_dev_attr_out_altvoltage0_frequency_start.dev_attr.attr, + &iio_dev_attr_out_altvoltage0_frequency_increment.dev_attr.attr, + &iio_dev_attr_out_altvoltage0_frequency_points.dev_attr.attr, + &iio_dev_attr_out_altvoltage0_settling_cycles.dev_attr.attr, &iio_dev_attr_in_voltage0_scale.dev_attr.attr, &iio_dev_attr_in_voltage0_scale_available.dev_attr.attr, NULL @@ -572,7 +572,8 @@ static int ad5933_ring_postenable(struct iio_dev *indio_dev) { struct ad5933_state *st = iio_priv(indio_dev); - /* AD5933_CTRL_INIT_START_FREQ: + /* + * AD5933_CTRL_INIT_START_FREQ: * High Q complex circuits require a long time to reach steady state. * To facilitate the measurement of such impedances, this mode allows * the user full control of the settling time requirement before @@ -663,7 +664,8 @@ static void ad5933_work(struct work_struct *work) } if (status & AD5933_STAT_SWEEP_DONE) { - /* last sample received - power down do + /* + * last sample received - power down do * nothing until the ring enable is toggled */ ad5933_cmd(st, AD5933_CTRL_POWER_DOWN); |