From: Sakari Ailus <[email protected]> Provide module ident information through sysfs.
Signed-off-by: Sakari Ailus <[email protected]> --- 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 02bfa44..e08e588 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); -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
