diff options
| author | Jean Delvare <khali@linux-fr.org> | 2010-11-15 21:38:56 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2010-11-15 21:38:56 +0100 |
| commit | 2a2d27da00250c9f117e35653ed5a6a3212e5d77 (patch) | |
| tree | 01f9d3363878eb50352c1786dc42bddf35017963 /drivers | |
| parent | hwmon: (w83795) List all usable temperature sources (diff) | |
| download | linux-2a2d27da00250c9f117e35653ed5a6a3212e5d77.tar.xz linux-2a2d27da00250c9f117e35653ed5a6a3212e5d77.zip | |
hwmon: (w83795) Print the actual temperature channels as sources
Don't expose raw register values to user-space. Decode and encode
temperature channels selected as temperature sources as needed.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/w83795.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c index c941d3eb249e..400558d97f3d 100644 --- a/drivers/hwmon/w83795.c +++ b/drivers/hwmon/w83795.c @@ -966,17 +966,18 @@ show_temp_src(struct device *dev, struct device_attribute *attr, char *buf) to_sensor_dev_attr_2(attr); struct w83795_data *data = w83795_update_pwm_config(dev); int index = sensor_attr->index; - u8 val = index / 2; - u8 tmp = data->temp_src[val]; + u8 tmp = data->temp_src[index / 2]; if (index & 1) - val = 4; + tmp >>= 4; /* Pick high nibble */ else - val = 0; - tmp >>= val; - tmp &= 0x0f; + tmp &= 0x0f; /* Pick low nibble */ - return sprintf(buf, "%u\n", tmp); + /* Look-up the actual temperature channel number */ + if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED) + return -EINVAL; /* Shouldn't happen */ + + return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1); } static ssize_t @@ -988,12 +989,21 @@ store_temp_src(struct device *dev, struct device_attribute *attr, struct sensor_device_attribute_2 *sensor_attr = to_sensor_dev_attr_2(attr); int index = sensor_attr->index; - unsigned long tmp; + int tmp; + unsigned long channel; u8 val = index / 2; - if (strict_strtoul(buf, 10, &tmp) < 0) + if (strict_strtoul(buf, 10, &channel) < 0 || + channel < 1 || channel > 14) + return -EINVAL; + + /* Check if request can be fulfilled */ + for (tmp = 0; tmp < 4; tmp++) { + if (tss_map[tmp][index] == channel - 1) + break; + } + if (tmp == 4) /* No match */ return -EINVAL; - tmp = SENSORS_LIMIT(tmp, 0, 15); mutex_lock(&data->update_lock); if (index & 1) { |