summaryrefslogtreecommitdiff
path: root/drivers/hwmon/ad7418.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/ad7418.c')
-rw-r--r--drivers/hwmon/ad7418.c114
1 files changed, 76 insertions, 38 deletions
diff --git a/drivers/hwmon/ad7418.c b/drivers/hwmon/ad7418.c
index a01b731ba5d7..7a132accdf8a 100644
--- a/drivers/hwmon/ad7418.c
+++ b/drivers/hwmon/ad7418.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* An hwmon driver for the Analog Devices AD7416/17/18
* Copyright (C) 2006-07 Tower Technologies
@@ -6,10 +7,6 @@
*
* Based on lm75.c
* Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
- *
- * 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 - version 2.
*/
#include <linux/module.h>
@@ -19,6 +16,7 @@
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
+#include <linux/of.h>
#include <linux/delay.h>
#include <linux/slab.h>
@@ -48,16 +46,17 @@ struct ad7418_data {
enum chips type;
struct mutex lock;
int adc_max; /* number of ADC channels */
- char valid;
+ bool valid;
unsigned long last_updated; /* In jiffies */
s16 temp[3]; /* Register values */
u16 in[4];
};
-static struct ad7418_data *ad7418_update_device(struct device *dev)
+static int ad7418_update_device(struct device *dev)
{
struct ad7418_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
+ s32 val;
mutex_lock(&data->lock);
@@ -67,63 +66,96 @@ static struct ad7418_data *ad7418_update_device(struct device *dev)
int i, ch;
/* read config register and clear channel bits */
- cfg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
+ val = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
+ if (val < 0)
+ goto abort;
+
+ cfg = val;
cfg &= 0x1F;
- i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
+ val = i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
cfg | AD7418_CH_TEMP);
+ if (val < 0)
+ goto abort;
+
udelay(30);
for (i = 0; i < 3; i++) {
- data->temp[i] =
- i2c_smbus_read_word_swapped(client,
- AD7418_REG_TEMP[i]);
+ val = i2c_smbus_read_word_swapped(client,
+ AD7418_REG_TEMP[i]);
+ if (val < 0)
+ goto abort;
+
+ data->temp[i] = val;
}
for (i = 0, ch = 4; i < data->adc_max; i++, ch--) {
- i2c_smbus_write_byte_data(client,
- AD7418_REG_CONF,
+ val = i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
cfg | AD7418_REG_ADC_CH(ch));
+ if (val < 0)
+ goto abort;
udelay(15);
- data->in[data->adc_max - 1 - i] =
- i2c_smbus_read_word_swapped(client,
- AD7418_REG_ADC);
+ val = i2c_smbus_read_word_swapped(client,
+ AD7418_REG_ADC);
+ if (val < 0)
+ goto abort;
+
+ data->in[data->adc_max - 1 - i] = val;
}
/* restore old configuration value */
- i2c_smbus_write_word_swapped(client, AD7418_REG_CONF, cfg);
+ val = i2c_smbus_write_word_swapped(client, AD7418_REG_CONF,
+ cfg);
+ if (val < 0)
+ goto abort;
data->last_updated = jiffies;
- data->valid = 1;
+ data->valid = true;
}
mutex_unlock(&data->lock);
+ return 0;
- return data;
+abort:
+ data->valid = false;
+ mutex_unlock(&data->lock);
+ return val;
}
-static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
- char *buf)
+static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct ad7418_data *data = ad7418_update_device(dev);
+ struct ad7418_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = ad7418_update_device(dev);
+ if (ret < 0)
+ return ret;
+
return sprintf(buf, "%d\n",
LM75_TEMP_FROM_REG(data->temp[attr->index]));
}
-static ssize_t show_adc(struct device *dev, struct device_attribute *devattr,
+static ssize_t adc_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct ad7418_data *data = ad7418_update_device(dev);
+ struct ad7418_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = ad7418_update_device(dev);
+ if (ret < 0)
+ return ret;
return sprintf(buf, "%d\n",
((data->in[attr->index] >> 6) * 2500 + 512) / 1024);
}
-static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
- const char *buf, size_t count)
+static ssize_t temp_store(struct device *dev,
+ struct device_attribute *devattr, const char *buf,
+ size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct ad7418_data *data = dev_get_drvdata(dev);
@@ -143,16 +175,14 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
return count;
}
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
- show_temp, set_temp, 1);
-static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
- show_temp, set_temp, 2);
+static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
+static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp, 1);
+static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, 2);
-static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 0);
-static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 1);
-static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 2);
-static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 3);
+static SENSOR_DEVICE_ATTR_RO(in1_input, adc, 0);
+static SENSOR_DEVICE_ATTR_RO(in2_input, adc, 1);
+static SENSOR_DEVICE_ATTR_RO(in3_input, adc, 2);
+static SENSOR_DEVICE_ATTR_RO(in4_input, adc, 3);
static struct attribute *ad7416_attrs[] = {
&sensor_dev_attr_temp1_max.dev_attr.attr,
@@ -200,8 +230,7 @@ static void ad7418_init_client(struct i2c_client *client)
}
}
-static int ad7418_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int ad7418_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct i2c_adapter *adapter = client->adapter;
@@ -221,7 +250,7 @@ static int ad7418_probe(struct i2c_client *client,
mutex_init(&data->lock);
data->client = client;
- data->type = id->driver_data;
+ data->type = (uintptr_t)i2c_get_match_data(client);
switch (data->type) {
case ad7416:
@@ -259,9 +288,18 @@ static const struct i2c_device_id ad7418_id[] = {
};
MODULE_DEVICE_TABLE(i2c, ad7418_id);
+static const struct of_device_id ad7418_dt_ids[] = {
+ { .compatible = "adi,ad7416", .data = (void *)ad7416, },
+ { .compatible = "adi,ad7417", .data = (void *)ad7417, },
+ { .compatible = "adi,ad7418", .data = (void *)ad7418, },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ad7418_dt_ids);
+
static struct i2c_driver ad7418_driver = {
.driver = {
.name = "ad7418",
+ .of_match_table = ad7418_dt_ids,
},
.probe = ad7418_probe,
.id_table = ad7418_id,
generated by cgit (git 2.34.1) at 2025-12-25 15:07:13 +0000