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Date: Sun, 17 Mar 2013 18:45:56 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: lm-sensors@...sensors.org, linux-kernel@...r.kernel.org
Cc: Jean Delvare <khali@...ux-fr.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Guenter Roeck <linux@...ck-us.net>
Subject: [RFC PATCH 7/8] hwmon: (max16065) Convert to devm_hwmon_device_register API
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
drivers/hwmon/max16065.c | 103 +++++++++++++++++++++-------------------------
1 file changed, 47 insertions(+), 56 deletions(-)
diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c
index 2fa2c02..cb05219 100644
--- a/drivers/hwmon/max16065.c
+++ b/drivers/hwmon/max16065.c
@@ -84,6 +84,7 @@ static const bool max16065_have_current[] = {
struct max16065_data {
enum chips type;
struct device *hwmon_dev;
+ const struct attribute_group *groups[4];
struct mutex update_lock;
bool valid;
unsigned long last_updated; /* in jiffies */
@@ -144,7 +145,7 @@ static int max16065_read_adc(struct i2c_client *client, int reg)
static struct max16065_data *max16065_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
struct max16065_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
@@ -186,7 +187,7 @@ static ssize_t max16065_show_alarm(struct device *dev,
val &= (1 << attr2->index);
if (val)
- i2c_smbus_write_byte_data(to_i2c_client(dev),
+ i2c_smbus_write_byte_data(to_i2c_client(dev->parent),
MAX16065_FAULT(attr2->nr), val);
return snprintf(buf, PAGE_SIZE, "%d\n", !!val);
@@ -223,7 +224,7 @@ static ssize_t max16065_set_limit(struct device *dev,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
struct max16065_data *data = i2c_get_clientdata(client);
unsigned long val;
int err;
@@ -250,7 +251,7 @@ static ssize_t max16065_show_limit(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
struct max16065_data *data = i2c_get_clientdata(client);
return snprintf(buf, PAGE_SIZE, "%d\n",
@@ -516,36 +517,58 @@ static struct attribute *max16065_max_attributes[] = {
NULL
};
+static umode_t max16065_basic_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct max16065_data *data = i2c_get_clientdata(client);
+ int channel = index / 4;
+
+ if (channel >= data->num_adc || !data->range[channel])
+ return 0;
+
+ return attr->mode;
+}
+
static const struct attribute_group max16065_basic_group = {
.attrs = max16065_basic_attributes,
+ .is_visible = max16065_basic_is_visible,
};
static const struct attribute_group max16065_current_group = {
.attrs = max16065_current_attributes,
};
+static umode_t max16065_limit_is_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct max16065_data *data = i2c_get_clientdata(client);
+
+ if (index >= data->num_adc || !data->range[index])
+ return 0;
+
+ return attr->mode;
+}
+
static const struct attribute_group max16065_min_group = {
.attrs = max16065_min_attributes,
+ .is_visible = max16065_limit_is_visible,
};
static const struct attribute_group max16065_max_group = {
.attrs = max16065_max_attributes,
+ .is_visible = max16065_limit_is_visible,
};
-static void max16065_cleanup(struct i2c_client *client)
-{
- sysfs_remove_group(&client->dev.kobj, &max16065_max_group);
- sysfs_remove_group(&client->dev.kobj, &max16065_min_group);
- sysfs_remove_group(&client->dev.kobj, &max16065_current_group);
- sysfs_remove_group(&client->dev.kobj, &max16065_basic_group);
-}
-
static int max16065_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct max16065_data *data;
- int i, j, val, ret;
+ int i, j, val, group = 0;
bool have_secondary; /* true if chip has secondary limits */
bool secondary_is_max = false; /* secondary limits reflect max */
@@ -597,37 +620,17 @@ static int max16065_probe(struct i2c_client *client,
}
/* Register sysfs hooks */
- for (i = 0; i < data->num_adc * 4; i++) {
- /* Do not create sysfs entry if channel is disabled */
- if (!data->range[i / 4])
- continue;
-
- ret = sysfs_create_file(&client->dev.kobj,
- max16065_basic_attributes[i]);
- if (unlikely(ret))
- goto out;
- }
+ data->groups[group++] = &max16065_basic_group;
if (have_secondary) {
- struct attribute **attr = secondary_is_max ?
- max16065_max_attributes : max16065_min_attributes;
-
- for (i = 0; i < data->num_adc; i++) {
- if (!data->range[i])
- continue;
-
- ret = sysfs_create_file(&client->dev.kobj, attr[i]);
- if (unlikely(ret))
- goto out;
- }
+ data->groups[group++] =
+ secondary_is_max ? &max16065_max_group : &max16065_min_group;
}
if (data->have_current) {
val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL);
- if (unlikely(val < 0)) {
- ret = val;
- goto out;
- }
+ if (unlikely(val < 0))
+ return val;
if (val & MAX16065_CURR_ENABLE) {
/*
* Current gain is 6, 12, 24, 48 based on values in
@@ -636,34 +639,22 @@ static int max16065_probe(struct i2c_client *client,
data->curr_gain = 6 << ((val >> 2) & 0x03);
data->range[MAX16065_NUM_ADC]
= max16065_csp_adc_range[(val >> 1) & 0x01];
- ret = sysfs_create_group(&client->dev.kobj,
- &max16065_current_group);
- if (unlikely(ret))
- goto out;
+ data->groups[group++] = &max16065_current_group;
} else {
data->have_current = false;
}
}
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (unlikely(IS_ERR(data->hwmon_dev))) {
- ret = PTR_ERR(data->hwmon_dev);
- goto out;
- }
- return 0;
+ data->hwmon_dev = devm_hwmon_device_register(&client->dev,
+ data->groups, id->name);
+ if (unlikely(IS_ERR(data->hwmon_dev)))
+ return PTR_ERR(data->hwmon_dev);
-out:
- max16065_cleanup(client);
- return ret;
+ return 0;
}
static int max16065_remove(struct i2c_client *client)
{
- struct max16065_data *data = i2c_get_clientdata(client);
-
- hwmon_device_unregister(data->hwmon_dev);
- max16065_cleanup(client);
-
return 0;
}
--
1.7.9.7
--
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