Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Dallas Semiconductor DS1682 Elapsed Time Recorder device driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Written by: Grant Likely <grant.likely@secretlab.ca>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright (C) 2007 Secret Lab Technologies Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * The DS1682 elapsed timer recorder is a simple device that implements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * one elapsed time counter, one event counter, an alarm signal and 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * bytes of general purpose EEPROM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * This driver provides access to the DS1682 counters and user data via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * the sysfs.  The following attributes are added to the device node:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *     elapsed_time (u32): Total elapsed event time in ms resolution
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *     alarm_time (u32): When elapsed time exceeds the value in alarm_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *                       then the alarm pin is asserted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *     event_count (u16): number of times the event pin has gone low.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *     eeprom (u8[10]): general purpose EEPROM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * Counter registers and user data are both read/write unless the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * has been write protected.  This driver does not support turning off write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * protection.  Once write protection is turned on, it is impossible to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * turn it off again, so I have left the feature out of this driver to avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * accidental enabling, but it is trivial to add write protect support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /* Device registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define DS1682_REG_CONFIG		0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define DS1682_REG_ALARM		0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define DS1682_REG_ELAPSED		0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define DS1682_REG_EVT_CNTR		0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define DS1682_REG_EEPROM		0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define DS1682_REG_RESET		0x1d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define DS1682_REG_WRITE_DISABLE	0x1e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define DS1682_REG_WRITE_MEM_DISABLE	0x1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define DS1682_EEPROM_SIZE		10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  * Generic counter attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) static ssize_t ds1682_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 			   char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	unsigned long long val, check;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	__le32 val_le = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	dev_dbg(dev, "ds1682_show() called on %s\n", attr->attr.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	/* Read the register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	rc = i2c_smbus_read_i2c_block_data(client, sattr->index, sattr->nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 					   (u8 *)&val_le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	val = le32_to_cpu(val_le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if (sattr->index == DS1682_REG_ELAPSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		int retries = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		/* Detect and retry when a tick occurs mid-read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			rc = i2c_smbus_read_i2c_block_data(client, sattr->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 							   sattr->nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 							   (u8 *)&val_le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			if (rc < 0 || retries <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 			check = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			val = le32_to_cpu(val_le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			retries--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		} while (val != check && val != (check + 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	/* Format the output string and return # of bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	 * Special case: the 32 bit regs are time values with 1/4s
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	 * resolution, scale them up to milliseconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	return sprintf(buf, "%llu\n", (sattr->nr == 4) ? (val * 250) : val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static ssize_t ds1682_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			    const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	u64 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	__le32 val_le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	dev_dbg(dev, "ds1682_store() called on %s\n", attr->attr.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	/* Decode input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	rc = kstrtoull(buf, 0, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		dev_dbg(dev, "input string not a number\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* Special case: the 32 bit regs are time values with 1/4s
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	 * resolution, scale input down to quarter-seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (sattr->nr == 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		do_div(val, 250);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	/* write out the value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	val_le = cpu_to_le32(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	rc = i2c_smbus_write_i2c_block_data(client, sattr->index, sattr->nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 					    (u8 *) & val_le);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		dev_err(dev, "register write failed; reg=0x%x, size=%i\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			sattr->index, sattr->nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  * Simple register attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static SENSOR_DEVICE_ATTR_2(elapsed_time, S_IRUGO | S_IWUSR, ds1682_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			    ds1682_store, 4, DS1682_REG_ELAPSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static SENSOR_DEVICE_ATTR_2(alarm_time, S_IRUGO | S_IWUSR, ds1682_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			    ds1682_store, 4, DS1682_REG_ALARM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static SENSOR_DEVICE_ATTR_2(event_count, S_IRUGO | S_IWUSR, ds1682_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			    ds1682_store, 2, DS1682_REG_EVT_CNTR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static const struct attribute_group ds1682_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	.attrs = (struct attribute *[]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		&sensor_dev_attr_elapsed_time.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		&sensor_dev_attr_alarm_time.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		&sensor_dev_attr_event_count.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  * User data attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static ssize_t ds1682_eeprom_read(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				  struct bin_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				  char *buf, loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct i2c_client *client = kobj_to_i2c_client(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	dev_dbg(&client->dev, "ds1682_eeprom_read(p=%p, off=%lli, c=%zi)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		buf, off, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	rc = i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 					   count, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static ssize_t ds1682_eeprom_write(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				   struct bin_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				   char *buf, loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	struct i2c_client *client = kobj_to_i2c_client(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	dev_dbg(&client->dev, "ds1682_eeprom_write(p=%p, off=%lli, c=%zi)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		buf, off, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	/* Write out to the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	if (i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 					   count, buf) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static const struct bin_attribute ds1682_eeprom_attr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	.attr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		.name = "eeprom",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		.mode = S_IRUGO | S_IWUSR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	.size = DS1682_EEPROM_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	.read = ds1682_eeprom_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	.write = ds1682_eeprom_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)  * Called when a ds1682 device is matched with this driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static int ds1682_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 				     I2C_FUNC_SMBUS_I2C_BLOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		dev_err(&client->dev, "i2c bus does not support the ds1682\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	rc = sysfs_create_group(&client->dev.kobj, &ds1682_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	rc = sysfs_create_bin_file(&client->dev.kobj, &ds1682_eeprom_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		goto exit_bin_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)  exit_bin_attr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	sysfs_remove_group(&client->dev.kobj, &ds1682_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)  exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static int ds1682_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	sysfs_remove_bin_file(&client->dev.kobj, &ds1682_eeprom_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	sysfs_remove_group(&client->dev.kobj, &ds1682_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static const struct i2c_device_id ds1682_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	{ "ds1682", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) MODULE_DEVICE_TABLE(i2c, ds1682_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static const struct of_device_id ds1682_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	{ .compatible = "dallas,ds1682", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) MODULE_DEVICE_TABLE(of, ds1682_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static struct i2c_driver ds1682_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		.name = "ds1682",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		.of_match_table = ds1682_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	.probe = ds1682_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	.remove = ds1682_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	.id_table = ds1682_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) module_i2c_driver(ds1682_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) MODULE_DESCRIPTION("DS1682 Elapsed Time Indicator driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) MODULE_LICENSE("GPL");