// SPDX-License-Identifier: GPL-2.0-only /* * 1-Wire implementation for the ds2438 chip * * Copyright (c) 2017 Mariusz Bialonczyk <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/device.h> #include <linux/types.h> #include <linux/delay.h> #include <linux/w1.h> #define W1_FAMILY_DS2438 … #define W1_DS2438_RETRIES … /* Memory commands */ #define W1_DS2438_READ_SCRATCH … #define W1_DS2438_WRITE_SCRATCH … #define W1_DS2438_COPY_SCRATCH … #define W1_DS2438_RECALL_MEMORY … /* Register commands */ #define W1_DS2438_CONVERT_TEMP … #define W1_DS2438_CONVERT_VOLTAGE … #define DS2438_PAGE_SIZE … #define DS2438_ADC_INPUT_VAD … #define DS2438_ADC_INPUT_VDD … #define DS2438_MAX_CONVERSION_TIME … /* Page #0 definitions */ #define DS2438_STATUS_REG … #define DS2438_STATUS_IAD … #define DS2438_STATUS_CA … #define DS2438_STATUS_EE … #define DS2438_STATUS_AD … #define DS2438_STATUS_TB … #define DS2438_STATUS_NVB … #define DS2438_STATUS_ADB … #define DS2438_TEMP_LSB … #define DS2438_TEMP_MSB … #define DS2438_VOLTAGE_LSB … #define DS2438_VOLTAGE_MSB … #define DS2438_CURRENT_LSB … #define DS2438_CURRENT_MSB … #define DS2438_THRESHOLD … /* Page #1 definitions */ #define DS2438_ETM_0 … #define DS2438_ETM_1 … #define DS2438_ETM_2 … #define DS2438_ETM_3 … #define DS2438_ICA … #define DS2438_OFFSET_LSB … #define DS2438_OFFSET_MSB … static int w1_ds2438_get_page(struct w1_slave *sl, int pageno, u8 *buf) { … } static int w1_ds2438_get_temperature(struct w1_slave *sl, int16_t *temperature) { … } static int w1_ds2438_change_config_bit(struct w1_slave *sl, u8 mask, u8 value) { … } static int w1_ds2438_change_offset_register(struct w1_slave *sl, u8 *value) { … } static int w1_ds2438_get_voltage(struct w1_slave *sl, int adc_input, uint16_t *voltage) { … } static int w1_ds2438_get_current(struct w1_slave *sl, int16_t *voltage) { … } static ssize_t iad_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t iad_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t page0_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t page1_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t offset_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t temperature_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t vad_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t vdd_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static BIN_ATTR_RW(iad, 0); static BIN_ATTR_RO(page0, DS2438_PAGE_SIZE); static BIN_ATTR_RO(page1, DS2438_PAGE_SIZE); static BIN_ATTR_WO(offset, 2); static BIN_ATTR_RO(temperature, 0/* real length varies */); static BIN_ATTR_RO(vad, 0/* real length varies */); static BIN_ATTR_RO(vdd, 0/* real length varies */); static struct bin_attribute *w1_ds2438_bin_attrs[] = …; static const struct attribute_group w1_ds2438_group = …; static const struct attribute_group *w1_ds2438_groups[] = …; static const struct w1_family_ops w1_ds2438_fops = …; static struct w1_family w1_ds2438_family = …; module_w1_family(…); MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_ALIAS(…) …;
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