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hwmon fixes for v5.2-rc4 

Fix a couple of inconsistencies and locking problems in pmbus driver.
 Register with thermal subsystem only on systems supporting devicetree.
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Merge tag 'hwmon-for-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - Fix a couple of inconsistencies and locking problems in pmbus driver

 - Register with thermal subsystem only on systems supporting devicetree

* tag 'hwmon-for-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (pmbus/core) Treat parameters as paged if on multiple pages
  hwmon: (pmbus/core) mutex_lock write in pmbus_set_samples
  hwmon: (core) add thermal sensors only if dev->of_node is present
This commit is contained in:
Linus Torvalds 2019-06-07 13:38:53 -07:00
parent 893a7d32e8 4a60570dce
commit d4425649c6
2 changed files with 34 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/hwmon/hwmon.c
View File

@ -636,7 +636,7 @@ __hwmon_device_register(struct device *dev, const char *name, void *drvdata,
if (err)
goto free_hwmon;
if (dev && chip && chip->ops->read &&
if (dev && dev->of_node && chip && chip->ops->read &&
chip->info[0]->type == hwmon_chip &&
(chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) {
const struct hwmon_channel_info **info = chip->info;

37
drivers/hwmon/pmbus/pmbus_core.c
View File

@ -1217,7 +1217,8 @@ static int pmbus_add_sensor_attrs_one(struct i2c_client *client,
const struct pmbus_driver_info *info,
const char *name,
int index, int page,
const struct pmbus_sensor_attr *attr)
const struct pmbus_sensor_attr *attr,
bool paged)
{
struct pmbus_sensor *base;
bool upper = !!(attr->gbit & 0xff00); /* need to check STATUS_WORD */
@ -1225,7 +1226,7 @@ static int pmbus_add_sensor_attrs_one(struct i2c_client *client,
if (attr->label) {
ret = pmbus_add_label(data, name, index, attr->label,
attr->paged ? page + 1 : 0);
paged ? page + 1 : 0);
if (ret)
return ret;
}
@ -1258,6 +1259,30 @@ static int pmbus_add_sensor_attrs_one(struct i2c_client *client,
return 0;
}
static bool pmbus_sensor_is_paged(const struct pmbus_driver_info *info,
const struct pmbus_sensor_attr *attr)
{
int p;
if (attr->paged)
return true;
/*
* Some attributes may be present on more than one page despite
* not being marked with the paged attribute. If that is the case,
* then treat the sensor as being paged and add the page suffix to the
* attribute name.
* We don't just add the paged attribute to all such attributes, in
* order to maintain the un-suffixed labels in the case where the
* attribute is only on page 0.
*/
for (p = 1; p < info->pages; p++) {
if (info->func[p] & attr->func)
return true;
}
return false;
}
static int pmbus_add_sensor_attrs(struct i2c_client *client,
struct pmbus_data *data,
const char *name,
@ -1271,14 +1296,15 @@ static int pmbus_add_sensor_attrs(struct i2c_client *client,
index = 1;
for (i = 0; i < nattrs; i++) {
int page, pages;
bool paged = pmbus_sensor_is_paged(info, attrs);
pages = attrs->paged ? info->pages : 1;
pages = paged ? info->pages : 1;
for (page = 0; page < pages; page++) {
if (!(info->func[page] & attrs->func))
continue;
ret = pmbus_add_sensor_attrs_one(client, data, info,
name, index, page,
attrs);
attrs, paged);
if (ret)
return ret;
index++;
@ -1942,11 +1968,14 @@ static ssize_t pmbus_set_samples(struct device *dev,
long val;
struct i2c_client *client = to_i2c_client(dev->parent);
struct pmbus_samples_reg *reg = to_samples_reg(devattr);
struct pmbus_data *data = i2c_get_clientdata(client);
if (kstrtol(buf, 0, &val) < 0)
return -EINVAL;
mutex_lock(&data->update_lock);
ret = _pmbus_write_word_data(client, reg->page, reg->attr->reg, val);
mutex_unlock(&data->update_lock);
return ret ? : count;
}