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Release 4.11 drivers/w1/slaves/w1_ds2781.c

/*
 * 1-Wire implementation for the ds2781 chip
 *
 * Author: Renata Sayakhova <renata@oktetlabs.ru>
 *
 * Based on w1-ds2780 driver
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>

#include "../w1.h"
#include "../w1_int.h"
#include "../w1_family.h"
#include "w1_ds2781.h"


static int w1_ds2781_do_io(struct device *dev, char *buf, int addr, size_t count, int io) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); if (addr > DS2781_DATA_SIZE || addr < 0) return 0; count = min_t(int, count, DS2781_DATA_SIZE - addr); if (w1_reset_select_slave(sl) == 0) { if (io) { w1_write_8(sl->master, W1_DS2781_WRITE_DATA); w1_write_8(sl->master, addr); w1_write_block(sl->master, buf, count); } else { w1_write_8(sl->master, W1_DS2781_READ_DATA); w1_write_8(sl->master, addr); count = w1_read_block(sl->master, buf, count); } } return count; }

Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova148100.00%1100.00%
Total148100.00%1100.00%


int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count, int io) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); int ret; if (!dev) return -ENODEV; mutex_lock(&sl->master->bus_mutex); ret = w1_ds2781_do_io(dev, buf, addr, count, io); mutex_unlock(&sl->master->bus_mutex); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova8697.73%150.00%
Neil Brown22.27%150.00%
Total88100.00%2100.00%

EXPORT_SYMBOL(w1_ds2781_io);
int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); if (!dev) return -EINVAL; mutex_lock(&sl->master->bus_mutex); if (w1_reset_select_slave(sl) == 0) { w1_write_8(sl->master, cmd); w1_write_8(sl->master, addr); } mutex_unlock(&sl->master->bus_mutex); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova9097.83%150.00%
Neil Brown22.17%150.00%
Total92100.00%2100.00%

EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { struct device *dev = container_of(kobj, struct device, kobj); return w1_ds2781_io(dev, buf, off, count, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova5998.33%150.00%
Greg Kroah-Hartman11.67%150.00%
Total60100.00%2100.00%

static BIN_ATTR_RO(w1_slave, DS2781_DATA_SIZE); static struct bin_attribute *w1_ds2781_bin_attrs[] = { &bin_attr_w1_slave, NULL, }; static const struct attribute_group w1_ds2781_group = { .bin_attrs = w1_ds2781_bin_attrs, }; static const struct attribute_group *w1_ds2781_groups[] = { &w1_ds2781_group, NULL, };
static int w1_ds2781_add_slave(struct w1_slave *sl) { int ret; struct platform_device *pdev; pdev = platform_device_alloc("ds2781-battery", PLATFORM_DEVID_AUTO); if (!pdev) return -ENOMEM; pdev->dev.parent = &sl->dev; ret = platform_device_add(pdev); if (ret) goto pdev_add_failed; dev_set_drvdata(&sl->dev, pdev); return 0; pdev_add_failed: platform_device_put(pdev); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova8195.29%133.33%
Andrew F. Davis33.53%133.33%
Wei Yongjun11.18%133.33%
Total85100.00%3100.00%


static void w1_ds2781_remove_slave(struct w1_slave *sl) { struct platform_device *pdev = dev_get_drvdata(&sl->dev); platform_device_unregister(pdev); }

Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova29100.00%1100.00%
Total29100.00%1100.00%

static struct w1_family_ops w1_ds2781_fops = { .add_slave = w1_ds2781_add_slave, .remove_slave = w1_ds2781_remove_slave, .groups = w1_ds2781_groups, }; static struct w1_family w1_ds2781_family = { .fid = W1_FAMILY_DS2781, .fops = &w1_ds2781_fops, }; module_w1_family(w1_ds2781_family); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>"); MODULE_DESCRIPTION("1-wire Driver for Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC"); MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_DS2781));

Overall Contributors

PersonTokensPropCommitsCommitProp
Renata Sayakhova59890.33%114.29%
Greg Kroah-Hartman456.80%114.29%
Alexander Stein91.36%114.29%
Andrew F. Davis50.76%228.57%
Neil Brown40.60%114.29%
Wei Yongjun10.15%114.29%
Total662100.00%7100.00%
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