iio: adc: ti-ads1015: add support for ADS1115 part (ba35f111) · Commits · e / devices / android_kernel_teracube_emerald

drivers/iio/adc/ti-ads1015.c

+109 −15

Original line number	Original line	Diff line number	Diff line
	@@ -55,6 +55,11 @@
	#define ADS1015_DEFAULT_DATA_RATE 4		#define ADS1015_DEFAULT_DATA_RATE 4
	#define ADS1015_DEFAULT_CHAN 0		#define ADS1015_DEFAULT_CHAN 0

			enum {
			ADS1015,
			ADS1115,
			};

	enum ads1015_channels {		enum ads1015_channels {
	ADS1015_AIN0_AIN1 = 0,		ADS1015_AIN0_AIN1 = 0,
	ADS1015_AIN0_AIN3,		ADS1015_AIN0_AIN3,
	@@ -71,6 +76,10 @@ static const unsigned int ads1015_data_rate[] = {
	128, 250, 490, 920, 1600, 2400, 3300, 3300		128, 250, 490, 920, 1600, 2400, 3300, 3300
	};		};

			static const unsigned int ads1115_data_rate[] = {
			8, 16, 32, 64, 128, 250, 475, 860
			};

	static const struct {		static const struct {
	int scale;		int scale;
	int uscale;		int uscale;
	@@ -123,6 +132,42 @@ static const struct {
	}, \		}, \
	}		}

			#define ADS1115_V_CHAN(_chan, _addr) { \
			.type = IIO_VOLTAGE, \
			.indexed = 1, \
			.address = _addr, \
			.channel = _chan, \
			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \| \
			BIT(IIO_CHAN_INFO_SCALE) \| \
			BIT(IIO_CHAN_INFO_SAMP_FREQ), \
			.scan_index = _addr, \
			.scan_type = { \
			.sign = 's', \
			.realbits = 16, \
			.storagebits = 16, \
			.endianness = IIO_CPU, \
			}, \
			}

			#define ADS1115_V_DIFF_CHAN(_chan, _chan2, _addr) { \
			.type = IIO_VOLTAGE, \
			.differential = 1, \
			.indexed = 1, \
			.address = _addr, \
			.channel = _chan, \
			.channel2 = _chan2, \
			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \| \
			BIT(IIO_CHAN_INFO_SCALE) \| \
			BIT(IIO_CHAN_INFO_SAMP_FREQ), \
			.scan_index = _addr, \
			.scan_type = { \
			.sign = 's', \
			.realbits = 16, \
			.storagebits = 16, \
			.endianness = IIO_CPU, \
			}, \
			}

	struct ads1015_data {		struct ads1015_data {
	struct regmap *regmap;		struct regmap *regmap;
	/*		/*
	@@ -131,6 +176,8 @@ struct ads1015_data {
	*/		*/
	struct mutex lock;		struct mutex lock;
	struct ads1015_channel_data channel_data[ADS1015_CHANNELS];		struct ads1015_channel_data channel_data[ADS1015_CHANNELS];

			unsigned int *data_rate;
	};		};

	static bool ads1015_is_writeable_reg(struct device *dev, unsigned int reg)		static bool ads1015_is_writeable_reg(struct device *dev, unsigned int reg)
	@@ -157,6 +204,18 @@ static const struct iio_chan_spec ads1015_channels[] = {
	IIO_CHAN_SOFT_TIMESTAMP(ADS1015_TIMESTAMP),		IIO_CHAN_SOFT_TIMESTAMP(ADS1015_TIMESTAMP),
	};		};

			static const struct iio_chan_spec ads1115_channels[] = {
			ADS1115_V_DIFF_CHAN(0, 1, ADS1015_AIN0_AIN1),
			ADS1115_V_DIFF_CHAN(0, 3, ADS1015_AIN0_AIN3),
			ADS1115_V_DIFF_CHAN(1, 3, ADS1015_AIN1_AIN3),
			ADS1115_V_DIFF_CHAN(2, 3, ADS1015_AIN2_AIN3),
			ADS1115_V_CHAN(0, ADS1015_AIN0),
			ADS1115_V_CHAN(1, ADS1015_AIN1),
			ADS1115_V_CHAN(2, ADS1015_AIN2),
			ADS1115_V_CHAN(3, ADS1015_AIN3),
			IIO_CHAN_SOFT_TIMESTAMP(ADS1015_TIMESTAMP),
			};

	static int ads1015_set_power_state(struct ads1015_data *data, bool on)		static int ads1015_set_power_state(struct ads1015_data *data, bool on)
	{		{
	int ret;		int ret;
	@@ -196,7 +255,7 @@ int ads1015_get_adc_result(struct ads1015_data data, int chan, int val)
	return ret;		return ret;

	if (change) {		if (change) {
	conv_time = DIV_ROUND_UP(USEC_PER_SEC, ads1015_data_rate[dr]);		conv_time = DIV_ROUND_UP(USEC_PER_SEC, data->data_rate[dr]);
	usleep_range(conv_time, conv_time + 1);		usleep_range(conv_time, conv_time + 1);
	}		}

	@@ -263,7 +322,7 @@ static int ads1015_set_data_rate(struct ads1015_data *data, int chan, int rate)
	int i, ret, rindex = -1;		int i, ret, rindex = -1;

	for (i = 0; i < ARRAY_SIZE(ads1015_data_rate); i++)		for (i = 0; i < ARRAY_SIZE(ads1015_data_rate); i++)
	if (ads1015_data_rate[i] == rate) {		if (data->data_rate[i] == rate) {
	rindex = i;		rindex = i;
	break;		break;
	}		}
	@@ -291,7 +350,9 @@ static int ads1015_read_raw(struct iio_dev *indio_dev,
	mutex_lock(&indio_dev->mlock);		mutex_lock(&indio_dev->mlock);
	mutex_lock(&data->lock);		mutex_lock(&data->lock);
	switch (mask) {		switch (mask) {
	case IIO_CHAN_INFO_RAW:		case IIO_CHAN_INFO_RAW: {
			int shift = chan->scan_type.shift;

	if (iio_buffer_enabled(indio_dev)) {		if (iio_buffer_enabled(indio_dev)) {
	ret = -EBUSY;		ret = -EBUSY;
	break;		break;
	@@ -307,8 +368,7 @@ static int ads1015_read_raw(struct iio_dev *indio_dev,
	break;		break;
	}		}

	/* 12 bit res, D0 is bit 4 in conversion register */		val = sign_extend32(val >> shift, 15 - shift);
	val = sign_extend32(val >> 4, 11);

	ret = ads1015_set_power_state(data, false);		ret = ads1015_set_power_state(data, false);
	if (ret < 0)		if (ret < 0)
	@@ -316,6 +376,7 @@ static int ads1015_read_raw(struct iio_dev *indio_dev,

	ret = IIO_VAL_INT;		ret = IIO_VAL_INT;
	break;		break;
			}
	case IIO_CHAN_INFO_SCALE:		case IIO_CHAN_INFO_SCALE:
	idx = data->channel_data[chan->address].pga;		idx = data->channel_data[chan->address].pga;
	*val = ads1015_scale[idx].scale;		*val = ads1015_scale[idx].scale;
	@@ -324,7 +385,7 @@ static int ads1015_read_raw(struct iio_dev *indio_dev,
	break;		break;
	case IIO_CHAN_INFO_SAMP_FREQ:		case IIO_CHAN_INFO_SAMP_FREQ:
	idx = data->channel_data[chan->address].data_rate;		idx = data->channel_data[chan->address].data_rate;
	*val = ads1015_data_rate[idx];		*val = data->data_rate[idx];
	ret = IIO_VAL_INT;		ret = IIO_VAL_INT;
	break;		break;
	default:		default:
	@@ -380,12 +441,15 @@ static const struct iio_buffer_setup_ops ads1015_buffer_setup_ops = {
	};		};

	static IIO_CONST_ATTR(scale_available, "3 2 1 0.5 0.25 0.125");		static IIO_CONST_ATTR(scale_available, "3 2 1 0.5 0.25 0.125");
	static IIO_CONST_ATTR(sampling_frequency_available,
	"128 250 490 920 1600 2400 3300");		static IIO_CONST_ATTR_NAMED(ads1015_sampling_frequency_available,
			sampling_frequency_available, "128 250 490 920 1600 2400 3300");
			static IIO_CONST_ATTR_NAMED(ads1115_sampling_frequency_available,
			sampling_frequency_available, "8 16 32 64 128 250 475 860");

	static struct attribute *ads1015_attributes[] = {		static struct attribute *ads1015_attributes[] = {
	&iio_const_attr_scale_available.dev_attr.attr,		&iio_const_attr_scale_available.dev_attr.attr,
	&iio_const_attr_sampling_frequency_available.dev_attr.attr,		&iio_const_attr_ads1015_sampling_frequency_available.dev_attr.attr,
	NULL,		NULL,
	};		};

	@@ -393,13 +457,30 @@ static const struct attribute_group ads1015_attribute_group = {
	.attrs = ads1015_attributes,		.attrs = ads1015_attributes,
	};		};

	static const struct iio_info ads1015_info = {		static struct attribute *ads1115_attributes[] = {
			&iio_const_attr_scale_available.dev_attr.attr,
			&iio_const_attr_ads1115_sampling_frequency_available.dev_attr.attr,
			NULL,
			};

			static const struct attribute_group ads1115_attribute_group = {
			.attrs = ads1115_attributes,
			};

			static struct iio_info ads1015_info = {
	.driver_module = THIS_MODULE,		.driver_module = THIS_MODULE,
	.read_raw = ads1015_read_raw,		.read_raw = ads1015_read_raw,
	.write_raw = ads1015_write_raw,		.write_raw = ads1015_write_raw,
	.attrs = &ads1015_attribute_group,		.attrs = &ads1015_attribute_group,
	};		};

			static struct iio_info ads1115_info = {
			.driver_module = THIS_MODULE,
			.read_raw = ads1015_read_raw,
			.write_raw = ads1015_write_raw,
			.attrs = &ads1115_attribute_group,
			};

	#ifdef CONFIG_OF		#ifdef CONFIG_OF
	static int ads1015_get_channels_config_of(struct i2c_client *client)		static int ads1015_get_channels_config_of(struct i2c_client *client)
	{		{
	@@ -500,11 +581,23 @@ static int ads1015_probe(struct i2c_client *client,
	mutex_init(&data->lock);		mutex_init(&data->lock);

	indio_dev->dev.parent = &client->dev;		indio_dev->dev.parent = &client->dev;
	indio_dev->info = &ads1015_info;
	indio_dev->name = ADS1015_DRV_NAME;		indio_dev->name = ADS1015_DRV_NAME;
			indio_dev->modes = INDIO_DIRECT_MODE;

			switch (id->driver_data) {
			case ADS1015:
	indio_dev->channels = ads1015_channels;		indio_dev->channels = ads1015_channels;
	indio_dev->num_channels = ARRAY_SIZE(ads1015_channels);		indio_dev->num_channels = ARRAY_SIZE(ads1015_channels);
	indio_dev->modes = INDIO_DIRECT_MODE;		indio_dev->info = &ads1015_info;
			data->data_rate = (unsigned int *) &ads1015_data_rate;
			break;
			case ADS1115:
			indio_dev->channels = ads1115_channels;
			indio_dev->num_channels = ARRAY_SIZE(ads1115_channels);
			indio_dev->info = &ads1115_info;
			data->data_rate = (unsigned int *) &ads1115_data_rate;
			break;
			}

	/* we need to keep this ABI the same as used by hwmon ADS1015 driver */		/* we need to keep this ABI the same as used by hwmon ADS1015 driver */
	ads1015_get_channels_config(client);		ads1015_get_channels_config(client);
	@@ -590,7 +683,8 @@ static const struct dev_pm_ops ads1015_pm_ops = {
	};		};

	static const struct i2c_device_id ads1015_id[] = {		static const struct i2c_device_id ads1015_id[] = {
	{"ads1015", 0},		{"ads1015", ADS1015},
			{"ads1115", ADS1115},
	{}		{}
	};		};
	MODULE_DEVICE_TABLE(i2c, ads1015_id);		MODULE_DEVICE_TABLE(i2c, ads1015_id);