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Add meas-spec sensors common part

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Measurement specialties drivers common part.
These functions are used by further drivers
in the patchset: TSYS01, TSYS02D, HTU21, MS5637, MS8607

Signed-off-by: Ludovic Tancerel <ludovic.tancerel@maplehightech.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Ludovic Tancerel
2015-10-01 16:13:36 +02:00
committed by Jonathan Cameron
parent f9ab96e212
commit d574a87cc3
6 changed files with 730 additions and 0 deletions
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1
drivers/iio/common/Kconfig
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@@ -3,5 +3,6 @@
#
source "drivers/iio/common/hid-sensors/Kconfig"
source "drivers/iio/common/ms_sensors/Kconfig"
source "drivers/iio/common/ssp_sensors/Kconfig"
source "drivers/iio/common/st_sensors/Kconfig"

1
drivers/iio/common/Makefile
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@@ -8,5 +8,6 @@
# When adding new entries keep the list in alphabetical order
obj-y += hid-sensors/
obj-y += ms_sensors/
obj-y += ssp_sensors/
obj-y += st_sensors/

6
drivers/iio/common/ms_sensors/Kconfig Normal file
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@@ -0,0 +1,6 @@
#
# Measurements Specialties sensors common library
#
config IIO_MS_SENSORS_I2C
tristate

5
drivers/iio/common/ms_sensors/Makefile Normal file
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@@ -0,0 +1,5 @@
#
# Makefile for the Measurement Specialties sensor common modules.
#
obj-$(CONFIG_IIO_MS_SENSORS_I2C) += ms_sensors_i2c.o

651
drivers/iio/common/ms_sensors/ms_sensors_i2c.c Normal file
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66
drivers/iio/common/ms_sensors/ms_sensors_i2c.h Normal file
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@@ -0,0 +1,66 @@
/*
* Measurements Specialties common sensor driver
*
* Copyright (c) 2015 Measurement-Specialties
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _MS_SENSORS_I2C_H
#define _MS_SENSORS_I2C_H
#include <linux/i2c.h>
#include <linux/mutex.h>
#define MS_SENSORS_TP_PROM_WORDS_NB 7
/**
* struct ms_ht_dev - Humidity/Temperature sensor device structure
* @client: i2c client
* @lock: lock protecting the i2c conversion
* @res_index: index to selected sensor resolution
*/
struct ms_ht_dev {
struct i2c_client *client;
struct mutex lock;
u8 res_index;
};
/**
* struct ms_tp_dev - Temperature/Pressure sensor device structure
* @client: i2c client
* @lock: lock protecting the i2c conversion
* @prom: array of PROM coefficients used for conversion. Added element
* for CRC computation
* @res_index: index to selected sensor resolution
*/
struct ms_tp_dev {
struct i2c_client *client;
struct mutex lock;
u16 prom[MS_SENSORS_TP_PROM_WORDS_NB + 1];
u8 res_index;
};
int ms_sensors_reset(void *cli, u8 cmd, unsigned int delay);
int ms_sensors_read_prom_word(void *cli, int cmd, u16 *word);
int ms_sensors_convert_and_read(void *cli, u8 conv, u8 rd,
unsigned int delay, u32 *adc);
int ms_sensors_read_serial(struct i2c_client *client, u64 *sn);
ssize_t ms_sensors_show_serial(struct ms_ht_dev *dev_data, char *buf);
ssize_t ms_sensors_write_resolution(struct ms_ht_dev *dev_data, u8 i);
ssize_t ms_sensors_show_battery_low(struct ms_ht_dev *dev_data, char *buf);
ssize_t ms_sensors_show_heater(struct ms_ht_dev *dev_data, char *buf);
ssize_t ms_sensors_write_heater(struct ms_ht_dev *dev_data,
const char *buf, size_t len);
int ms_sensors_ht_read_temperature(struct ms_ht_dev *dev_data,
s32 *temperature);
int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data,
u32 *humidity);
int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data);
int ms_sensors_read_temp_and_pressure(struct ms_tp_dev *dev_data,
int *temperature,
unsigned int *pressure);
#endif /* _MS_SENSORS_I2C_H */