From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/drivers/hwmon/ads1015.c | 311 ---------------------------------- 1 file changed, 311 deletions(-) delete mode 100644 ANDROID_3.4.5/drivers/hwmon/ads1015.c (limited to 'ANDROID_3.4.5/drivers/hwmon/ads1015.c') diff --git a/ANDROID_3.4.5/drivers/hwmon/ads1015.c b/ANDROID_3.4.5/drivers/hwmon/ads1015.c deleted file mode 100644 index 1958f03e..00000000 --- a/ANDROID_3.4.5/drivers/hwmon/ads1015.c +++ /dev/null @@ -1,311 +0,0 @@ -/* - * ads1015.c - lm_sensors driver for ads1015 12-bit 4-input ADC - * (C) Copyright 2010 - * Dirk Eibach, Guntermann & Drunck GmbH - * - * Based on the ads7828 driver by Steve Hardy. - * - * Datasheet available at: http://focus.ti.com/lit/ds/symlink/ads1015.pdf - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -/* ADS1015 registers */ -enum { - ADS1015_CONVERSION = 0, - ADS1015_CONFIG = 1, -}; - -/* PGA fullscale voltages in mV */ -static const unsigned int fullscale_table[8] = { - 6144, 4096, 2048, 1024, 512, 256, 256, 256 }; - -/* Data rates in samples per second */ -static const unsigned int data_rate_table[8] = { - 128, 250, 490, 920, 1600, 2400, 3300, 3300 }; - -#define ADS1015_DEFAULT_CHANNELS 0xff -#define ADS1015_DEFAULT_PGA 2 -#define ADS1015_DEFAULT_DATA_RATE 4 - -struct ads1015_data { - struct device *hwmon_dev; - struct mutex update_lock; /* mutex protect updates */ - struct ads1015_channel_data channel_data[ADS1015_CHANNELS]; -}; - -static int ads1015_read_adc(struct i2c_client *client, unsigned int channel) -{ - u16 config; - struct ads1015_data *data = i2c_get_clientdata(client); - unsigned int pga = data->channel_data[channel].pga; - unsigned int data_rate = data->channel_data[channel].data_rate; - unsigned int conversion_time_ms; - int res; - - mutex_lock(&data->update_lock); - - /* get channel parameters */ - res = i2c_smbus_read_word_swapped(client, ADS1015_CONFIG); - if (res < 0) - goto err_unlock; - config = res; - conversion_time_ms = DIV_ROUND_UP(1000, data_rate_table[data_rate]); - - /* setup and start single conversion */ - config &= 0x001f; - config |= (1 << 15) | (1 << 8); - config |= (channel & 0x0007) << 12; - config |= (pga & 0x0007) << 9; - config |= (data_rate & 0x0007) << 5; - - res = i2c_smbus_write_word_swapped(client, ADS1015_CONFIG, config); - if (res < 0) - goto err_unlock; - - /* wait until conversion finished */ - msleep(conversion_time_ms); - res = i2c_smbus_read_word_swapped(client, ADS1015_CONFIG); - if (res < 0) - goto err_unlock; - config = res; - if (!(config & (1 << 15))) { - /* conversion not finished in time */ - res = -EIO; - goto err_unlock; - } - - res = i2c_smbus_read_word_swapped(client, ADS1015_CONVERSION); - -err_unlock: - mutex_unlock(&data->update_lock); - return res; -} - -static int ads1015_reg_to_mv(struct i2c_client *client, unsigned int channel, - s16 reg) -{ - struct ads1015_data *data = i2c_get_clientdata(client); - unsigned int pga = data->channel_data[channel].pga; - int fullscale = fullscale_table[pga]; - - return DIV_ROUND_CLOSEST(reg * fullscale, 0x7ff0); -} - -/* sysfs callback function */ -static ssize_t show_in(struct device *dev, struct device_attribute *da, - char *buf) -{ - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct i2c_client *client = to_i2c_client(dev); - int res; - int index = attr->index; - - res = ads1015_read_adc(client, index); - if (res < 0) - return res; - - return sprintf(buf, "%d\n", ads1015_reg_to_mv(client, index, res)); -} - -static const struct sensor_device_attribute ads1015_in[] = { - SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), - SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), - SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), - SENSOR_ATTR(in3_input, S_IRUGO, show_in, NULL, 3), - SENSOR_ATTR(in4_input, S_IRUGO, show_in, NULL, 4), - SENSOR_ATTR(in5_input, S_IRUGO, show_in, NULL, 5), - SENSOR_ATTR(in6_input, S_IRUGO, show_in, NULL, 6), - SENSOR_ATTR(in7_input, S_IRUGO, show_in, NULL, 7), -}; - -/* - * Driver interface - */ - -static int ads1015_remove(struct i2c_client *client) -{ - struct ads1015_data *data = i2c_get_clientdata(client); - int k; - - hwmon_device_unregister(data->hwmon_dev); - for (k = 0; k < ADS1015_CHANNELS; ++k) - device_remove_file(&client->dev, &ads1015_in[k].dev_attr); - kfree(data); - return 0; -} - -#ifdef CONFIG_OF -static int ads1015_get_channels_config_of(struct i2c_client *client) -{ - struct ads1015_data *data = i2c_get_clientdata(client); - struct device_node *node; - - if (!client->dev.of_node - || !of_get_next_child(client->dev.of_node, NULL)) - return -EINVAL; - - for_each_child_of_node(client->dev.of_node, node) { - const __be32 *property; - int len; - unsigned int channel; - unsigned int pga = ADS1015_DEFAULT_PGA; - unsigned int data_rate = ADS1015_DEFAULT_DATA_RATE; - - property = of_get_property(node, "reg", &len); - if (!property || len != sizeof(int)) { - dev_err(&client->dev, "invalid reg on %s\n", - node->full_name); - continue; - } - - channel = be32_to_cpup(property); - if (channel > ADS1015_CHANNELS) { - dev_err(&client->dev, - "invalid channel index %d on %s\n", - channel, node->full_name); - continue; - } - - property = of_get_property(node, "ti,gain", &len); - if (property && len == sizeof(int)) { - pga = be32_to_cpup(property); - if (pga > 6) { - dev_err(&client->dev, - "invalid gain on %s\n", - node->full_name); - } - } - - property = of_get_property(node, "ti,datarate", &len); - if (property && len == sizeof(int)) { - data_rate = be32_to_cpup(property); - if (data_rate > 7) { - dev_err(&client->dev, - "invalid data_rate on %s\n", - node->full_name); - } - } - - data->channel_data[channel].enabled = true; - data->channel_data[channel].pga = pga; - data->channel_data[channel].data_rate = data_rate; - } - - return 0; -} -#endif - -static void ads1015_get_channels_config(struct i2c_client *client) -{ - unsigned int k; - struct ads1015_data *data = i2c_get_clientdata(client); - struct ads1015_platform_data *pdata = dev_get_platdata(&client->dev); - - /* prefer platform data */ - if (pdata) { - memcpy(data->channel_data, pdata->channel_data, - sizeof(data->channel_data)); - return; - } - -#ifdef CONFIG_OF - if (!ads1015_get_channels_config_of(client)) - return; -#endif - - /* fallback on default configuration */ - for (k = 0; k < ADS1015_CHANNELS; ++k) { - data->channel_data[k].enabled = true; - data->channel_data[k].pga = ADS1015_DEFAULT_PGA; - data->channel_data[k].data_rate = ADS1015_DEFAULT_DATA_RATE; - } -} - -static int ads1015_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct ads1015_data *data; - int err; - unsigned int k; - - data = kzalloc(sizeof(struct ads1015_data), GFP_KERNEL); - if (!data) { - err = -ENOMEM; - goto exit; - } - - i2c_set_clientdata(client, data); - mutex_init(&data->update_lock); - - /* build sysfs attribute group */ - ads1015_get_channels_config(client); - for (k = 0; k < ADS1015_CHANNELS; ++k) { - if (!data->channel_data[k].enabled) - continue; - err = device_create_file(&client->dev, &ads1015_in[k].dev_attr); - if (err) - goto exit_remove; - } - - data->hwmon_dev = hwmon_device_register(&client->dev); - if (IS_ERR(data->hwmon_dev)) { - err = PTR_ERR(data->hwmon_dev); - goto exit_remove; - } - - return 0; - -exit_remove: - for (k = 0; k < ADS1015_CHANNELS; ++k) - device_remove_file(&client->dev, &ads1015_in[k].dev_attr); - kfree(data); -exit: - return err; -} - -static const struct i2c_device_id ads1015_id[] = { - { "ads1015", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ads1015_id); - -static struct i2c_driver ads1015_driver = { - .driver = { - .name = "ads1015", - }, - .probe = ads1015_probe, - .remove = ads1015_remove, - .id_table = ads1015_id, -}; - -module_i2c_driver(ads1015_driver); - -MODULE_AUTHOR("Dirk Eibach "); -MODULE_DESCRIPTION("ADS1015 driver"); -MODULE_LICENSE("GPL"); -- cgit