diff options
author | Sakari Ailus <sakari.ailus@iki.if> | 2012-09-15 18:26:54 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-09-26 17:43:54 -0300 |
commit | eba66b3e341ef7b72c2603b55cd5cd38d028c9da (patch) | |
tree | 995f04e0e7a9c74dd785e38c22ed13bb264a3830 /drivers/media/i2c | |
parent | f67e1573f08efb3225e7b1f05ecfec8b2ca8224b (diff) | |
download | linux-eba66b3e341ef7b72c2603b55cd5cd38d028c9da.tar.bz2 |
[media] smiapp: Provide module identification information through sysfs
Provide module ident information through sysfs.
Signed-off-by: Sakari Ailus <sakari.ailus@iki.if>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/i2c')
-rw-r--r-- | drivers/media/i2c/smiapp/smiapp-core.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c index 02bfa4472e02..e08e588ad24b 100644 --- a/drivers/media/i2c/smiapp/smiapp-core.c +++ b/drivers/media/i2c/smiapp/smiapp-core.c @@ -2211,6 +2211,21 @@ smiapp_sysfs_nvm_read(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR(nvm, S_IRUGO, smiapp_sysfs_nvm_read, NULL); +static ssize_t +smiapp_sysfs_ident_read(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev)); + struct smiapp_sensor *sensor = to_smiapp_sensor(subdev); + struct smiapp_module_info *minfo = &sensor->minfo; + + return snprintf(buf, PAGE_SIZE, "%2.2x%4.4x%2.2x\n", + minfo->manufacturer_id, minfo->model_id, + minfo->revision_number_major) + 1; +} + +static DEVICE_ATTR(ident, S_IRUGO, smiapp_sysfs_ident_read, NULL); + /* ----------------------------------------------------------------------------- * V4L2 subdev core operations */ @@ -2467,6 +2482,11 @@ static int smiapp_registered(struct v4l2_subdev *subdev) sensor->binning_horizontal = 1; sensor->binning_vertical = 1; + if (device_create_file(&client->dev, &dev_attr_ident) != 0) { + dev_err(&client->dev, "sysfs ident entry creation failed\n"); + rval = -ENOENT; + goto out_power_off; + } /* SMIA++ NVM initialization - it will be read from the sensor * when it is first requested by userspace. */ @@ -2476,13 +2496,13 @@ static int smiapp_registered(struct v4l2_subdev *subdev) if (sensor->nvm == NULL) { dev_err(&client->dev, "nvm buf allocation failed\n"); rval = -ENOMEM; - goto out_power_off; + goto out_ident_release; } if (device_create_file(&client->dev, &dev_attr_nvm) != 0) { dev_err(&client->dev, "sysfs nvm entry failed\n"); rval = -EBUSY; - goto out_power_off; + goto out_ident_release; } } @@ -2637,6 +2657,9 @@ static int smiapp_registered(struct v4l2_subdev *subdev) out_nvm_release: device_remove_file(&client->dev, &dev_attr_nvm); +out_ident_release: + device_remove_file(&client->dev, &dev_attr_ident); + out_power_off: smiapp_power_off(sensor); @@ -2832,6 +2855,7 @@ static int __exit smiapp_remove(struct i2c_client *client) sensor->power_count = 0; } + device_remove_file(&client->dev, &dev_attr_ident); if (sensor->nvm) device_remove_file(&client->dev, &dev_attr_nvm); |