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-rw-r--r--drivers/w1/slaves/w1_therm.c765
1 files changed, 765 insertions, 0 deletions
diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
new file mode 100644
index 000000000..aba727294
--- /dev/null
+++ b/drivers/w1/slaves/w1_therm.c
@@ -0,0 +1,765 @@
+/*
+ * w1_therm.c
+ *
+ * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the therms 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <asm/types.h>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/sched.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hwmon.h>
+
+#include <linux/w1.h>
+
+#define W1_THERM_DS18S20 0x10
+#define W1_THERM_DS1822 0x22
+#define W1_THERM_DS18B20 0x28
+#define W1_THERM_DS1825 0x3B
+#define W1_THERM_DS28EA00 0x42
+
+/* Allow the strong pullup to be disabled, but default to enabled.
+ * If it was disabled a parasite powered device might not get the require
+ * current to do a temperature conversion. If it is enabled parasite powered
+ * devices have a better chance of getting the current required.
+ * In case the parasite power-detection is not working (seems to be the case
+ * for some DS18S20) the strong pullup can also be forced, regardless of the
+ * power state of the devices.
+ *
+ * Summary of options:
+ * - strong_pullup = 0 Disable strong pullup completely
+ * - strong_pullup = 1 Enable automatic strong pullup detection
+ * - strong_pullup = 2 Force strong pullup
+ */
+static int w1_strong_pullup = 1;
+module_param_named(strong_pullup, w1_strong_pullup, int, 0);
+
+struct w1_therm_family_data {
+ uint8_t rom[9];
+ atomic_t refcnt;
+};
+
+struct therm_info {
+ u8 rom[9];
+ u8 crc;
+ u8 verdict;
+};
+
+/* return the address of the refcnt in the family data */
+#define THERM_REFCNT(family_data) \
+ (&((struct w1_therm_family_data *)family_data)->refcnt)
+
+static int w1_therm_add_slave(struct w1_slave *sl)
+{
+ sl->family_data = kzalloc(sizeof(struct w1_therm_family_data),
+ GFP_KERNEL);
+ if (!sl->family_data)
+ return -ENOMEM;
+ atomic_set(THERM_REFCNT(sl->family_data), 1);
+ return 0;
+}
+
+static void w1_therm_remove_slave(struct w1_slave *sl)
+{
+ int refcnt = atomic_sub_return(1, THERM_REFCNT(sl->family_data));
+
+ while (refcnt) {
+ msleep(1000);
+ refcnt = atomic_read(THERM_REFCNT(sl->family_data));
+ }
+ kfree(sl->family_data);
+ sl->family_data = NULL;
+}
+
+static ssize_t w1_slave_show(struct device *device,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t w1_slave_store(struct device *device,
+ struct device_attribute *attr, const char *buf, size_t size);
+
+static ssize_t w1_seq_show(struct device *device,
+ struct device_attribute *attr, char *buf);
+
+static DEVICE_ATTR_RW(w1_slave);
+static DEVICE_ATTR_RO(w1_seq);
+
+static struct attribute *w1_therm_attrs[] = {
+ &dev_attr_w1_slave.attr,
+ NULL,
+};
+
+static struct attribute *w1_ds28ea00_attrs[] = {
+ &dev_attr_w1_slave.attr,
+ &dev_attr_w1_seq.attr,
+ NULL,
+};
+
+ATTRIBUTE_GROUPS(w1_therm);
+ATTRIBUTE_GROUPS(w1_ds28ea00);
+
+#if IS_REACHABLE(CONFIG_HWMON)
+static int w1_read_temp(struct device *dev, u32 attr, int channel,
+ long *val);
+
+static umode_t w1_is_visible(const void *_data, enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ return attr == hwmon_temp_input ? 0444 : 0;
+}
+
+static int w1_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ switch (type) {
+ case hwmon_temp:
+ return w1_read_temp(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const u32 w1_temp_config[] = {
+ HWMON_T_INPUT,
+ 0
+};
+
+static const struct hwmon_channel_info w1_temp = {
+ .type = hwmon_temp,
+ .config = w1_temp_config,
+};
+
+static const struct hwmon_channel_info *w1_info[] = {
+ &w1_temp,
+ NULL
+};
+
+static const struct hwmon_ops w1_hwmon_ops = {
+ .is_visible = w1_is_visible,
+ .read = w1_read,
+};
+
+static const struct hwmon_chip_info w1_chip_info = {
+ .ops = &w1_hwmon_ops,
+ .info = w1_info,
+};
+#define W1_CHIPINFO (&w1_chip_info)
+#else
+#define W1_CHIPINFO NULL
+#endif
+
+static struct w1_family_ops w1_therm_fops = {
+ .add_slave = w1_therm_add_slave,
+ .remove_slave = w1_therm_remove_slave,
+ .groups = w1_therm_groups,
+ .chip_info = W1_CHIPINFO,
+};
+
+static struct w1_family_ops w1_ds28ea00_fops = {
+ .add_slave = w1_therm_add_slave,
+ .remove_slave = w1_therm_remove_slave,
+ .groups = w1_ds28ea00_groups,
+ .chip_info = W1_CHIPINFO,
+};
+
+static struct w1_family w1_therm_family_DS18S20 = {
+ .fid = W1_THERM_DS18S20,
+ .fops = &w1_therm_fops,
+};
+
+static struct w1_family w1_therm_family_DS18B20 = {
+ .fid = W1_THERM_DS18B20,
+ .fops = &w1_therm_fops,
+};
+
+static struct w1_family w1_therm_family_DS1822 = {
+ .fid = W1_THERM_DS1822,
+ .fops = &w1_therm_fops,
+};
+
+static struct w1_family w1_therm_family_DS28EA00 = {
+ .fid = W1_THERM_DS28EA00,
+ .fops = &w1_ds28ea00_fops,
+};
+
+static struct w1_family w1_therm_family_DS1825 = {
+ .fid = W1_THERM_DS1825,
+ .fops = &w1_therm_fops,
+};
+
+struct w1_therm_family_converter {
+ u8 broken;
+ u16 reserved;
+ struct w1_family *f;
+ int (*convert)(u8 rom[9]);
+ int (*precision)(struct device *device, int val);
+ int (*eeprom)(struct device *device);
+};
+
+/* write configuration to eeprom */
+static inline int w1_therm_eeprom(struct device *device);
+
+/* Set precision for conversion */
+static inline int w1_DS18B20_precision(struct device *device, int val);
+static inline int w1_DS18S20_precision(struct device *device, int val);
+
+/* The return value is millidegrees Centigrade. */
+static inline int w1_DS18B20_convert_temp(u8 rom[9]);
+static inline int w1_DS18S20_convert_temp(u8 rom[9]);
+
+static struct w1_therm_family_converter w1_therm_families[] = {
+ {
+ .f = &w1_therm_family_DS18S20,
+ .convert = w1_DS18S20_convert_temp,
+ .precision = w1_DS18S20_precision,
+ .eeprom = w1_therm_eeprom
+ },
+ {
+ .f = &w1_therm_family_DS1822,
+ .convert = w1_DS18B20_convert_temp,
+ .precision = w1_DS18S20_precision,
+ .eeprom = w1_therm_eeprom
+ },
+ {
+ .f = &w1_therm_family_DS18B20,
+ .convert = w1_DS18B20_convert_temp,
+ .precision = w1_DS18B20_precision,
+ .eeprom = w1_therm_eeprom
+ },
+ {
+ .f = &w1_therm_family_DS28EA00,
+ .convert = w1_DS18B20_convert_temp,
+ .precision = w1_DS18S20_precision,
+ .eeprom = w1_therm_eeprom
+ },
+ {
+ .f = &w1_therm_family_DS1825,
+ .convert = w1_DS18B20_convert_temp,
+ .precision = w1_DS18S20_precision,
+ .eeprom = w1_therm_eeprom
+ }
+};
+
+static inline int w1_therm_eeprom(struct device *device)
+{
+ struct w1_slave *sl = dev_to_w1_slave(device);
+ struct w1_master *dev = sl->master;
+ u8 rom[9], external_power;
+ int ret, max_trying = 10;
+ u8 *family_data = sl->family_data;
+
+ if (!sl->family_data) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ /* prevent the slave from going away in sleep */
+ atomic_inc(THERM_REFCNT(family_data));
+
+ ret = mutex_lock_interruptible(&dev->bus_mutex);
+ if (ret != 0)
+ goto dec_refcnt;
+
+ memset(rom, 0, sizeof(rom));
+
+ while (max_trying--) {
+ if (!w1_reset_select_slave(sl)) {
+ unsigned int tm = 10;
+ unsigned long sleep_rem;
+
+ /* check if in parasite mode */
+ w1_write_8(dev, W1_READ_PSUPPLY);
+ external_power = w1_read_8(dev);
+
+ if (w1_reset_select_slave(sl))
+ continue;
+
+ /* 10ms strong pullup/delay after the copy command */
+ if (w1_strong_pullup == 2 ||
+ (!external_power && w1_strong_pullup))
+ w1_next_pullup(dev, tm);
+
+ w1_write_8(dev, W1_COPY_SCRATCHPAD);
+
+ if (external_power) {
+ mutex_unlock(&dev->bus_mutex);
+
+ sleep_rem = msleep_interruptible(tm);
+ if (sleep_rem != 0) {
+ ret = -EINTR;
+ goto dec_refcnt;
+ }
+
+ ret = mutex_lock_interruptible(&dev->bus_mutex);
+ if (ret != 0)
+ goto dec_refcnt;
+ } else if (!w1_strong_pullup) {
+ sleep_rem = msleep_interruptible(tm);
+ if (sleep_rem != 0) {
+ ret = -EINTR;
+ goto mt_unlock;
+ }
+ }
+
+ break;
+ }
+ }
+
+mt_unlock:
+ mutex_unlock(&dev->bus_mutex);
+dec_refcnt:
+ atomic_dec(THERM_REFCNT(family_data));
+error:
+ return ret;
+}
+
+/* DS18S20 does not feature configuration register */
+static inline int w1_DS18S20_precision(struct device *device, int val)
+{
+ return 0;
+}
+
+static inline int w1_DS18B20_precision(struct device *device, int val)
+{
+ struct w1_slave *sl = dev_to_w1_slave(device);
+ struct w1_master *dev = sl->master;
+ u8 rom[9], crc;
+ int ret, max_trying = 10;
+ u8 *family_data = sl->family_data;
+ uint8_t precision_bits;
+ uint8_t mask = 0x60;
+
+ if (val > 12 || val < 9) {
+ pr_warn("Unsupported precision\n");
+ ret = -EINVAL;
+ goto error;
+ }
+
+ if (!sl->family_data) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ /* prevent the slave from going away in sleep */
+ atomic_inc(THERM_REFCNT(family_data));
+
+ ret = mutex_lock_interruptible(&dev->bus_mutex);
+ if (ret != 0)
+ goto dec_refcnt;
+
+ memset(rom, 0, sizeof(rom));
+
+ /* translate precision to bitmask (see datasheet page 9) */
+ switch (val) {
+ case 9:
+ precision_bits = 0x00;
+ break;
+ case 10:
+ precision_bits = 0x20;
+ break;
+ case 11:
+ precision_bits = 0x40;
+ break;
+ case 12:
+ default:
+ precision_bits = 0x60;
+ break;
+ }
+
+ while (max_trying--) {
+ crc = 0;
+
+ if (!w1_reset_select_slave(sl)) {
+ int count = 0;
+
+ /* read values to only alter precision bits */
+ w1_write_8(dev, W1_READ_SCRATCHPAD);
+ count = w1_read_block(dev, rom, 9);
+ if (count != 9)
+ dev_warn(device, "w1_read_block() returned %u instead of 9.\n", count);
+
+ crc = w1_calc_crc8(rom, 8);
+ if (rom[8] == crc) {
+ rom[4] = (rom[4] & ~mask) | (precision_bits & mask);
+
+ if (!w1_reset_select_slave(sl)) {
+ w1_write_8(dev, W1_WRITE_SCRATCHPAD);
+ w1_write_8(dev, rom[2]);
+ w1_write_8(dev, rom[3]);
+ w1_write_8(dev, rom[4]);
+
+ break;
+ }
+ }
+ }
+ }
+
+ mutex_unlock(&dev->bus_mutex);
+dec_refcnt:
+ atomic_dec(THERM_REFCNT(family_data));
+error:
+ return ret;
+}
+
+static inline int w1_DS18B20_convert_temp(u8 rom[9])
+{
+ s16 t = le16_to_cpup((__le16 *)rom);
+
+ return t*1000/16;
+}
+
+static inline int w1_DS18S20_convert_temp(u8 rom[9])
+{
+ int t, h;
+
+ if (!rom[7])
+ return 0;
+
+ if (rom[1] == 0)
+ t = ((s32)rom[0] >> 1)*1000;
+ else
+ t = 1000*(-1*(s32)(0x100-rom[0]) >> 1);
+
+ t -= 250;
+ h = 1000*((s32)rom[7] - (s32)rom[6]);
+ h /= (s32)rom[7];
+ t += h;
+
+ return t;
+}
+
+static inline int w1_convert_temp(u8 rom[9], u8 fid)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(w1_therm_families); ++i)
+ if (w1_therm_families[i].f->fid == fid)
+ return w1_therm_families[i].convert(rom);
+
+ return 0;
+}
+
+static ssize_t w1_slave_store(struct device *device,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ int val, ret;
+ struct w1_slave *sl = dev_to_w1_slave(device);
+ int i;
+
+ ret = kstrtoint(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(w1_therm_families); ++i) {
+ if (w1_therm_families[i].f->fid == sl->family->fid) {
+ /* zero value indicates to write current configuration to eeprom */
+ if (val == 0)
+ ret = w1_therm_families[i].eeprom(device);
+ else
+ ret = w1_therm_families[i].precision(device, val);
+ break;
+ }
+ }
+ return ret ? : size;
+}
+
+static ssize_t read_therm(struct device *device,
+ struct w1_slave *sl, struct therm_info *info)
+{
+ struct w1_master *dev = sl->master;
+ u8 external_power;
+ int ret, max_trying = 10;
+ u8 *family_data = sl->family_data;
+
+ if (!family_data) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ /* prevent the slave from going away in sleep */
+ atomic_inc(THERM_REFCNT(family_data));
+
+ ret = mutex_lock_interruptible(&dev->bus_mutex);
+ if (ret != 0)
+ goto dec_refcnt;
+
+ memset(info->rom, 0, sizeof(info->rom));
+
+ while (max_trying--) {
+
+ info->verdict = 0;
+ info->crc = 0;
+
+ if (!w1_reset_select_slave(sl)) {
+ int count = 0;
+ unsigned int tm = 750;
+ unsigned long sleep_rem;
+
+ w1_write_8(dev, W1_READ_PSUPPLY);
+ external_power = w1_read_8(dev);
+
+ if (w1_reset_select_slave(sl))
+ continue;
+
+ /* 750ms strong pullup (or delay) after the convert */
+ if (w1_strong_pullup == 2 ||
+ (!external_power && w1_strong_pullup))
+ w1_next_pullup(dev, tm);
+
+ w1_write_8(dev, W1_CONVERT_TEMP);
+
+ if (external_power) {
+ mutex_unlock(&dev->bus_mutex);
+
+ sleep_rem = msleep_interruptible(tm);
+ if (sleep_rem != 0) {
+ ret = -EINTR;
+ goto dec_refcnt;
+ }
+
+ ret = mutex_lock_interruptible(&dev->bus_mutex);
+ if (ret != 0)
+ goto dec_refcnt;
+ } else if (!w1_strong_pullup) {
+ sleep_rem = msleep_interruptible(tm);
+ if (sleep_rem != 0) {
+ ret = -EINTR;
+ goto mt_unlock;
+ }
+ }
+
+ if (!w1_reset_select_slave(sl)) {
+
+ w1_write_8(dev, W1_READ_SCRATCHPAD);
+ count = w1_read_block(dev, info->rom, 9);
+ if (count != 9) {
+ dev_warn(device, "w1_read_block() "
+ "returned %u instead of 9.\n",
+ count);
+ }
+
+ info->crc = w1_calc_crc8(info->rom, 8);
+
+ if (info->rom[8] == info->crc)
+ info->verdict = 1;
+ }
+ }
+
+ if (info->verdict)
+ break;
+ }
+
+mt_unlock:
+ mutex_unlock(&dev->bus_mutex);
+dec_refcnt:
+ atomic_dec(THERM_REFCNT(family_data));
+error:
+ return ret;
+}
+
+static ssize_t w1_slave_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct w1_slave *sl = dev_to_w1_slave(device);
+ struct therm_info info;
+ u8 *family_data = sl->family_data;
+ int ret, i;
+ ssize_t c = PAGE_SIZE;
+ u8 fid = sl->family->fid;
+
+ ret = read_therm(device, sl, &info);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < 9; ++i)
+ c -= snprintf(buf + PAGE_SIZE - c, c, "%02x ", info.rom[i]);
+ c -= snprintf(buf + PAGE_SIZE - c, c, ": crc=%02x %s\n",
+ info.crc, (info.verdict) ? "YES" : "NO");
+ if (info.verdict)
+ memcpy(family_data, info.rom, sizeof(info.rom));
+ else
+ dev_warn(device, "Read failed CRC check\n");
+
+ for (i = 0; i < 9; ++i)
+ c -= snprintf(buf + PAGE_SIZE - c, c, "%02x ",
+ ((u8 *)family_data)[i]);
+
+ c -= snprintf(buf + PAGE_SIZE - c, c, "t=%d\n",
+ w1_convert_temp(info.rom, fid));
+ ret = PAGE_SIZE - c;
+ return ret;
+}
+
+#if IS_REACHABLE(CONFIG_HWMON)
+static int w1_read_temp(struct device *device, u32 attr, int channel,
+ long *val)
+{
+ struct w1_slave *sl = dev_get_drvdata(device);
+ struct therm_info info;
+ u8 fid = sl->family->fid;
+ int ret;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ ret = read_therm(device, sl, &info);
+ if (ret)
+ return ret;
+
+ if (!info.verdict) {
+ ret = -EIO;
+ return ret;
+ }
+
+ *val = w1_convert_temp(info.rom, fid);
+ ret = 0;
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+#endif
+
+#define W1_42_CHAIN 0x99
+#define W1_42_CHAIN_OFF 0x3C
+#define W1_42_CHAIN_OFF_INV 0xC3
+#define W1_42_CHAIN_ON 0x5A
+#define W1_42_CHAIN_ON_INV 0xA5
+#define W1_42_CHAIN_DONE 0x96
+#define W1_42_CHAIN_DONE_INV 0x69
+#define W1_42_COND_READ 0x0F
+#define W1_42_SUCCESS_CONFIRM_BYTE 0xAA
+#define W1_42_FINISHED_BYTE 0xFF
+static ssize_t w1_seq_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct w1_slave *sl = dev_to_w1_slave(device);
+ ssize_t c = PAGE_SIZE;
+ int rv;
+ int i;
+ u8 ack;
+ u64 rn;
+ struct w1_reg_num *reg_num;
+ int seq = 0;
+
+ mutex_lock(&sl->master->bus_mutex);
+ /* Place all devices in CHAIN state */
+ if (w1_reset_bus(sl->master))
+ goto error;
+ w1_write_8(sl->master, W1_SKIP_ROM);
+ w1_write_8(sl->master, W1_42_CHAIN);
+ w1_write_8(sl->master, W1_42_CHAIN_ON);
+ w1_write_8(sl->master, W1_42_CHAIN_ON_INV);
+ msleep(sl->master->pullup_duration);
+
+ /* check for acknowledgment */
+ ack = w1_read_8(sl->master);
+ if (ack != W1_42_SUCCESS_CONFIRM_BYTE)
+ goto error;
+
+ /* In case the bus fails to send 0xFF, limit*/
+ for (i = 0; i <= 64; i++) {
+ if (w1_reset_bus(sl->master))
+ goto error;
+
+ w1_write_8(sl->master, W1_42_COND_READ);
+ rv = w1_read_block(sl->master, (u8 *)&rn, 8);
+ reg_num = (struct w1_reg_num *) &rn;
+ if (reg_num->family == W1_42_FINISHED_BYTE)
+ break;
+ if (sl->reg_num.id == reg_num->id)
+ seq = i;
+
+ if (w1_reset_bus(sl->master))
+ goto error;
+
+ /* Put the device into chain DONE state */
+ w1_write_8(sl->master, W1_MATCH_ROM);
+ w1_write_block(sl->master, (u8 *)&rn, 8);
+ w1_write_8(sl->master, W1_42_CHAIN);
+ w1_write_8(sl->master, W1_42_CHAIN_DONE);
+ w1_write_8(sl->master, W1_42_CHAIN_DONE_INV);
+
+ /* check for acknowledgment */
+ ack = w1_read_8(sl->master);
+ if (ack != W1_42_SUCCESS_CONFIRM_BYTE)
+ goto error;
+ }
+
+ /* Exit from CHAIN state */
+ if (w1_reset_bus(sl->master))
+ goto error;
+ w1_write_8(sl->master, W1_SKIP_ROM);
+ w1_write_8(sl->master, W1_42_CHAIN);
+ w1_write_8(sl->master, W1_42_CHAIN_OFF);
+ w1_write_8(sl->master, W1_42_CHAIN_OFF_INV);
+
+ /* check for acknowledgment */
+ ack = w1_read_8(sl->master);
+ if (ack != W1_42_SUCCESS_CONFIRM_BYTE)
+ goto error;
+ mutex_unlock(&sl->master->bus_mutex);
+
+ c -= snprintf(buf + PAGE_SIZE - c, c, "%d\n", seq);
+ return PAGE_SIZE - c;
+error:
+ mutex_unlock(&sl->master->bus_mutex);
+ return -EIO;
+}
+
+static int __init w1_therm_init(void)
+{
+ int err, i;
+
+ for (i = 0; i < ARRAY_SIZE(w1_therm_families); ++i) {
+ err = w1_register_family(w1_therm_families[i].f);
+ if (err)
+ w1_therm_families[i].broken = 1;
+ }
+
+ return 0;
+}
+
+static void __exit w1_therm_fini(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(w1_therm_families); ++i)
+ if (!w1_therm_families[i].broken)
+ w1_unregister_family(w1_therm_families[i].f);
+}
+
+module_init(w1_therm_init);
+module_exit(w1_therm_fini);
+
+MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
+MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, temperature family.");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS18S20));
+MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS1822));
+MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS18B20));
+MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS1825));
+MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS28EA00));
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-19 14:15:24 +0000