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iio:pressure:ms5637: introduce hardware differentiation

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Some sensors in the ms58xx family have a different PROM length and a
different number of available resolution. introduce struct ms_tp_hw_data to
handle those differences.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210109231148.1168104-3-alexandre.belloni@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandre Belloni 2021-01-10 00:11:44 +01:00 committed by Jonathan Cameron
parent d1004b707d
commit 8c125f5f32
2 changed files with 51 additions and 10 deletions
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11
drivers/iio/common/ms_sensors/ms_sensors_i2c.h
View File

@ -25,6 +25,16 @@ struct ms_ht_dev {
u8 res_index;
};
/**
* struct ms_hw_data - Temperature/Pressure sensor hardware data
* @prom_len: number of words in the PROM
* @max_res_index: maximum sensor resolution index
*/
struct ms_tp_hw_data {
u8 prom_len;
u8 max_res_index;
};
/**
* struct ms_tp_dev - Temperature/Pressure sensor device structure
* @client: i2c client
@ -36,6 +46,7 @@ struct ms_ht_dev {
struct ms_tp_dev {
struct i2c_client *client;
struct mutex lock;
const struct ms_tp_hw_data *hw;
u16 prom[MS_SENSORS_TP_PROM_WORDS_NB + 1];
u8 res_index;
};

50
drivers/iio/pressure/ms5637.c
View File

@ -30,6 +30,11 @@
#include "../common/ms_sensors/ms_sensors_i2c.h"
struct ms_tp_data {
const char *name;
const struct ms_tp_hw_data *hw;
};
static const int ms5637_samp_freq[6] = { 960, 480, 240, 120, 60, 30 };
/* String copy of the above const for readability purpose */
static const char ms5637_show_samp_freq[] = "960 480 240 120 60 30";
@ -129,6 +134,7 @@ static const struct iio_info ms5637_info = {
static int ms5637_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct ms_tp_data *data;
struct ms_tp_dev *dev_data;
struct iio_dev *indio_dev;
int ret;
@ -142,17 +148,25 @@ static int ms5637_probe(struct i2c_client *client,
return -EOPNOTSUPP;
}
if (id)
data = (const struct ms_tp_data *)id->driver_data;
else
data = device_get_match_data(&client->dev);
if (!data)
return -EINVAL;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dev_data));
if (!indio_dev)
return -ENOMEM;
dev_data = iio_priv(indio_dev);
dev_data->client = client;
dev_data->res_index = 5;
dev_data->res_index = data->hw->max_res_index;
dev_data->hw = data->hw;
mutex_init(&dev_data->lock);
indio_dev->info = &ms5637_info;
indio_dev->name = id->name;
indio_dev->name = data->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = ms5637_channels;
indio_dev->num_channels = ARRAY_SIZE(ms5637_channels);
@ -170,20 +184,36 @@ static int ms5637_probe(struct i2c_client *client,
return devm_iio_device_register(&client->dev, indio_dev);
}
static const struct ms_tp_hw_data ms5637_hw_data = {
.prom_len = 7,
.max_res_index = 5
};
static const struct ms_tp_data ms5637_data = { .name = "ms5637", .hw = &ms5637_hw_data };
static const struct ms_tp_data ms5805_data = { .name = "ms5805", .hw = &ms5637_hw_data };
static const struct ms_tp_data ms5837_data = { .name = "ms5837", .hw = &ms5637_hw_data };
static const struct ms_tp_data ms8607_data = {
.name = "ms8607-temppressure",
.hw = &ms5637_hw_data,
};
static const struct i2c_device_id ms5637_id[] = {
{"ms5637", 0},
{"ms5805", 0},
{"ms5837", 0},
{"ms8607-temppressure", 0},
{"ms5637", (kernel_ulong_t)&ms5637_data },
{"ms5805", (kernel_ulong_t)&ms5805_data },
{"ms5837", (kernel_ulong_t)&ms5837_data },
{"ms8607-temppressure", (kernel_ulong_t)&ms8607_data },
{}
};
MODULE_DEVICE_TABLE(i2c, ms5637_id);
static const struct of_device_id ms5637_of_match[] = {
{ .compatible = "meas,ms5637", },
{ .compatible = "meas,ms5805", },
{ .compatible = "meas,ms5837", },
{ .compatible = "meas,ms8607-temppressure", },
{ .compatible = "meas,ms5637", .data = &ms5637_data },
{ .compatible = "meas,ms5805", .data = &ms5805_data },
{ .compatible = "meas,ms5837", .data = &ms5837_data },
{ .compatible = "meas,ms8607-temppressure", .data = &ms8607_data },
{ },
};
MODULE_DEVICE_TABLE(of, ms5637_of_match);