forked from Minki/linux
hwmon: Remove ads1015 driver
A driver for ADS1015 with more functionality is available in the iio subsystem. Remove the hwmon driver as duplicate. If the chip is used for hardware monitoring, the iio->hwmon bridge should be used. Cc: Dirk Eibach <eibach@gdsys.de> Link: https://lore.kernel.org/r/1562004758-13025-1-git-send-email-linux@roeck-us.net Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
e027a2dea5
commit
2c9d5b5e32
@ -1,90 +0,0 @@
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Kernel driver ads1015
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=====================
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Supported chips:
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* Texas Instruments ADS1015
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Prefix: 'ads1015'
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Datasheet: Publicly available at the Texas Instruments website:
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http://focus.ti.com/lit/ds/symlink/ads1015.pdf
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* Texas Instruments ADS1115
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Prefix: 'ads1115'
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Datasheet: Publicly available at the Texas Instruments website:
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http://focus.ti.com/lit/ds/symlink/ads1115.pdf
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Authors:
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Dirk Eibach, Guntermann & Drunck GmbH <eibach@gdsys.de>
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Description
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-----------
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This driver implements support for the Texas Instruments ADS1015/ADS1115.
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This device is a 12/16-bit A-D converter with 4 inputs.
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The inputs can be used single ended or in certain differential combinations.
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The inputs can be made available by 8 sysfs input files in0_input - in7_input:
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- in0: Voltage over AIN0 and AIN1.
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- in1: Voltage over AIN0 and AIN3.
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- in2: Voltage over AIN1 and AIN3.
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- in3: Voltage over AIN2 and AIN3.
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- in4: Voltage over AIN0 and GND.
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- in5: Voltage over AIN1 and GND.
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- in6: Voltage over AIN2 and GND.
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- in7: Voltage over AIN3 and GND.
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Which inputs are available can be configured using platform data or devicetree.
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By default all inputs are exported.
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Platform Data
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-------------
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In linux/platform_data/ads1015.h platform data is defined, channel_data contains
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configuration data for the used input combinations:
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- pga is the programmable gain amplifier (values are full scale)
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- 0: +/- 6.144 V
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- 1: +/- 4.096 V
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- 2: +/- 2.048 V
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- 3: +/- 1.024 V
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- 4: +/- 0.512 V
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- 5: +/- 0.256 V
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- data_rate in samples per second
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- 0: 128
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- 1: 250
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- 2: 490
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- 3: 920
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- 4: 1600
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- 5: 2400
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- 6: 3300
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Example::
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struct ads1015_platform_data data = {
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.channel_data = {
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[2] = { .enabled = true, .pga = 1, .data_rate = 0 },
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[4] = { .enabled = true, .pga = 4, .data_rate = 5 },
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}
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};
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In this case only in2_input (FS +/- 4.096 V, 128 SPS) and in4_input
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(FS +/- 0.512 V, 2400 SPS) would be created.
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Devicetree
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----------
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Configuration is also possible via devicetree:
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Documentation/devicetree/bindings/hwmon/ads1015.txt
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@ -30,7 +30,6 @@ Hardware Monitoring Kernel Drivers
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adm1031
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adm1275
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adm9240
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ads1015
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ads7828
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adt7410
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adt7411
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@ -517,14 +517,6 @@ W: http://ez.analog.com/community/linux-device-drivers
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S: Supported
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F: drivers/video/backlight/adp8860_bl.c
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ADS1015 HARDWARE MONITOR DRIVER
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M: Dirk Eibach <eibach@gdsys.de>
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L: linux-hwmon@vger.kernel.org
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S: Maintained
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F: Documentation/hwmon/ads1015.rst
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F: drivers/hwmon/ads1015.c
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F: include/linux/platform_data/ads1015.h
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ADT746X FAN DRIVER
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M: Colin Leroy <colin@colino.net>
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S: Maintained
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@ -1570,16 +1570,6 @@ config SENSORS_ADC128D818
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This driver can also be built as a module. If so, the module
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will be called adc128d818.
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config SENSORS_ADS1015
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tristate "Texas Instruments ADS1015"
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depends on I2C
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help
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If you say yes here you get support for Texas Instruments
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ADS1015/ADS1115 12/16-bit 4-input ADC device.
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This driver can also be built as a module. If so, the module
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will be called ads1015.
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config SENSORS_ADS7828
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tristate "Texas Instruments ADS7828 and compatibles"
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depends on I2C
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@ -35,7 +35,6 @@ obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o
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obj-$(CONFIG_SENSORS_ADM1029) += adm1029.o
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obj-$(CONFIG_SENSORS_ADM1031) += adm1031.o
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obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o
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obj-$(CONFIG_SENSORS_ADS1015) += ads1015.o
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obj-$(CONFIG_SENSORS_ADS7828) += ads7828.o
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obj-$(CONFIG_SENSORS_ADS7871) += ads7871.o
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obj-$(CONFIG_SENSORS_ADT7X10) += adt7x10.o
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@ -1,324 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ads1015.c - lm_sensors driver for ads1015 12-bit 4-input ADC
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* (C) Copyright 2010
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* Dirk Eibach, Guntermann & Drunck GmbH <eibach@gdsys.de>
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*
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* Based on the ads7828 driver by Steve Hardy.
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*
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* Datasheet available at: http://focus.ti.com/lit/ds/symlink/ads1015.pdf
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/platform_data/ads1015.h>
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/* ADS1015 registers */
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enum {
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ADS1015_CONVERSION = 0,
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ADS1015_CONFIG = 1,
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};
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/* PGA fullscale voltages in mV */
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static const unsigned int fullscale_table[8] = {
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6144, 4096, 2048, 1024, 512, 256, 256, 256 };
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/* Data rates in samples per second */
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static const unsigned int data_rate_table_1015[8] = {
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128, 250, 490, 920, 1600, 2400, 3300, 3300
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};
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static const unsigned int data_rate_table_1115[8] = {
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8, 16, 32, 64, 128, 250, 475, 860
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};
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#define ADS1015_DEFAULT_CHANNELS 0xff
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#define ADS1015_DEFAULT_PGA 2
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#define ADS1015_DEFAULT_DATA_RATE 4
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enum ads1015_chips {
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ads1015,
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ads1115,
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};
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struct ads1015_data {
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struct device *hwmon_dev;
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struct mutex update_lock; /* mutex protect updates */
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struct ads1015_channel_data channel_data[ADS1015_CHANNELS];
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enum ads1015_chips id;
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};
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static int ads1015_read_adc(struct i2c_client *client, unsigned int channel)
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{
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u16 config;
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struct ads1015_data *data = i2c_get_clientdata(client);
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unsigned int pga = data->channel_data[channel].pga;
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unsigned int data_rate = data->channel_data[channel].data_rate;
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unsigned int conversion_time_ms;
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const unsigned int * const rate_table = data->id == ads1115 ?
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data_rate_table_1115 : data_rate_table_1015;
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int res;
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mutex_lock(&data->update_lock);
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/* get channel parameters */
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res = i2c_smbus_read_word_swapped(client, ADS1015_CONFIG);
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if (res < 0)
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goto err_unlock;
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config = res;
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conversion_time_ms = DIV_ROUND_UP(1000, rate_table[data_rate]);
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/* setup and start single conversion */
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config &= 0x001f;
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config |= (1 << 15) | (1 << 8);
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config |= (channel & 0x0007) << 12;
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config |= (pga & 0x0007) << 9;
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config |= (data_rate & 0x0007) << 5;
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res = i2c_smbus_write_word_swapped(client, ADS1015_CONFIG, config);
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if (res < 0)
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goto err_unlock;
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/* wait until conversion finished */
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msleep(conversion_time_ms);
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res = i2c_smbus_read_word_swapped(client, ADS1015_CONFIG);
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if (res < 0)
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goto err_unlock;
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config = res;
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if (!(config & (1 << 15))) {
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/* conversion not finished in time */
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res = -EIO;
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goto err_unlock;
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}
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res = i2c_smbus_read_word_swapped(client, ADS1015_CONVERSION);
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err_unlock:
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mutex_unlock(&data->update_lock);
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return res;
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}
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static int ads1015_reg_to_mv(struct i2c_client *client, unsigned int channel,
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s16 reg)
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{
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struct ads1015_data *data = i2c_get_clientdata(client);
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unsigned int pga = data->channel_data[channel].pga;
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int fullscale = fullscale_table[pga];
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const int mask = data->id == ads1115 ? 0x7fff : 0x7ff0;
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return DIV_ROUND_CLOSEST(reg * fullscale, mask);
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}
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/* sysfs callback function */
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static ssize_t in_show(struct device *dev, struct device_attribute *da,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
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struct i2c_client *client = to_i2c_client(dev);
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int res;
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int index = attr->index;
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res = ads1015_read_adc(client, index);
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if (res < 0)
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return res;
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return sprintf(buf, "%d\n", ads1015_reg_to_mv(client, index, res));
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}
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static const struct sensor_device_attribute ads1015_in[] = {
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SENSOR_ATTR_RO(in0_input, in, 0),
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SENSOR_ATTR_RO(in1_input, in, 1),
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SENSOR_ATTR_RO(in2_input, in, 2),
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SENSOR_ATTR_RO(in3_input, in, 3),
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SENSOR_ATTR_RO(in4_input, in, 4),
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SENSOR_ATTR_RO(in5_input, in, 5),
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SENSOR_ATTR_RO(in6_input, in, 6),
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SENSOR_ATTR_RO(in7_input, in, 7),
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};
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/*
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* Driver interface
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*/
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static int ads1015_remove(struct i2c_client *client)
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{
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struct ads1015_data *data = i2c_get_clientdata(client);
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int k;
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hwmon_device_unregister(data->hwmon_dev);
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for (k = 0; k < ADS1015_CHANNELS; ++k)
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device_remove_file(&client->dev, &ads1015_in[k].dev_attr);
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return 0;
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}
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#ifdef CONFIG_OF
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static int ads1015_get_channels_config_of(struct i2c_client *client)
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{
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struct ads1015_data *data = i2c_get_clientdata(client);
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struct device_node *node;
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if (!client->dev.of_node
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|| !of_get_next_child(client->dev.of_node, NULL))
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return -EINVAL;
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for_each_child_of_node(client->dev.of_node, node) {
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u32 pval;
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unsigned int channel;
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unsigned int pga = ADS1015_DEFAULT_PGA;
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unsigned int data_rate = ADS1015_DEFAULT_DATA_RATE;
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if (of_property_read_u32(node, "reg", &pval)) {
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dev_err(&client->dev, "invalid reg on %pOF\n", node);
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continue;
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}
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channel = pval;
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if (channel >= ADS1015_CHANNELS) {
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dev_err(&client->dev,
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"invalid channel index %d on %pOF\n",
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channel, node);
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continue;
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}
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if (!of_property_read_u32(node, "ti,gain", &pval)) {
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pga = pval;
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if (pga > 6) {
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dev_err(&client->dev, "invalid gain on %pOF\n",
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node);
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return -EINVAL;
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}
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}
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if (!of_property_read_u32(node, "ti,datarate", &pval)) {
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data_rate = pval;
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if (data_rate > 7) {
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dev_err(&client->dev,
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"invalid data_rate on %pOF\n", node);
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return -EINVAL;
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}
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}
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data->channel_data[channel].enabled = true;
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data->channel_data[channel].pga = pga;
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data->channel_data[channel].data_rate = data_rate;
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}
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return 0;
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}
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#endif
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static void ads1015_get_channels_config(struct i2c_client *client)
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{
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unsigned int k;
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struct ads1015_data *data = i2c_get_clientdata(client);
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struct ads1015_platform_data *pdata = dev_get_platdata(&client->dev);
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/* prefer platform data */
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if (pdata) {
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memcpy(data->channel_data, pdata->channel_data,
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sizeof(data->channel_data));
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return;
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}
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#ifdef CONFIG_OF
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if (!ads1015_get_channels_config_of(client))
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return;
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#endif
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/* fallback on default configuration */
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for (k = 0; k < ADS1015_CHANNELS; ++k) {
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data->channel_data[k].enabled = true;
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data->channel_data[k].pga = ADS1015_DEFAULT_PGA;
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data->channel_data[k].data_rate = ADS1015_DEFAULT_DATA_RATE;
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}
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}
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static int ads1015_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct ads1015_data *data;
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int err;
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unsigned int k;
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data = devm_kzalloc(&client->dev, sizeof(struct ads1015_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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if (client->dev.of_node)
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data->id = (enum ads1015_chips)
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of_device_get_match_data(&client->dev);
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else
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data->id = id->driver_data;
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i2c_set_clientdata(client, data);
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mutex_init(&data->update_lock);
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/* build sysfs attribute group */
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ads1015_get_channels_config(client);
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for (k = 0; k < ADS1015_CHANNELS; ++k) {
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if (!data->channel_data[k].enabled)
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continue;
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err = device_create_file(&client->dev, &ads1015_in[k].dev_attr);
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if (err)
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goto exit_remove;
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}
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data->hwmon_dev = hwmon_device_register(&client->dev);
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if (IS_ERR(data->hwmon_dev)) {
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err = PTR_ERR(data->hwmon_dev);
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goto exit_remove;
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}
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return 0;
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exit_remove:
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for (k = 0; k < ADS1015_CHANNELS; ++k)
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device_remove_file(&client->dev, &ads1015_in[k].dev_attr);
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return err;
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}
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static const struct i2c_device_id ads1015_id[] = {
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{ "ads1015", ads1015},
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{ "ads1115", ads1115},
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, ads1015_id);
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static const struct of_device_id __maybe_unused ads1015_of_match[] = {
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{
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.compatible = "ti,ads1015",
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.data = (void *)ads1015
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},
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{
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.compatible = "ti,ads1115",
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.data = (void *)ads1115
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},
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{ },
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};
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MODULE_DEVICE_TABLE(of, ads1015_of_match);
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static struct i2c_driver ads1015_driver = {
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.driver = {
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.name = "ads1015",
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.of_match_table = of_match_ptr(ads1015_of_match),
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},
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.probe = ads1015_probe,
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.remove = ads1015_remove,
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.id_table = ads1015_id,
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};
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module_i2c_driver(ads1015_driver);
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MODULE_AUTHOR("Dirk Eibach <eibach@gdsys.de>");
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MODULE_DESCRIPTION("ADS1015 driver");
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MODULE_LICENSE("GPL");
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@ -958,7 +958,7 @@ config TI_ADC161S626
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config TI_ADS1015
|
||||
tristate "Texas Instruments ADS1015 ADC"
|
||||
depends on I2C && !SENSORS_ADS1015
|
||||
depends on I2C
|
||||
select REGMAP_I2C
|
||||
select IIO_BUFFER
|
||||
select IIO_TRIGGERED_BUFFER
|
||||
|
||||
Loading…
Reference in New Issue
Block a user