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    Subject[PATCH 16/22 v4] Input: atmel_mxt_ts - add sysfs entries to read fw and hw version
    Date
    Make firmware and hardware version strings available to userspace.
    This is useful, for example, to allow a userspace program to implement
    a firwmare update policy.

    Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
    ---
    drivers/input/touchscreen/atmel_mxt_ts.c | 24 ++++++++++++++++++++++++
    1 files changed, 24 insertions(+), 0 deletions(-)

    diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
    index 9200cf4..0d769de 100644
    --- a/drivers/input/touchscreen/atmel_mxt_ts.c
    +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
    @@ -863,6 +863,26 @@ static void mxt_calc_resolution(struct mxt_data *data)
    }
    }

    +/* Firmware Version is returned as Major.Minor.Build */
    +static ssize_t mxt_fw_version_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct mxt_data *data = dev_get_drvdata(dev);
    + struct mxt_info *info = &data->info;
    + return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
    + info->version >> 4, info->version & 0xf, info->build);
    +}
    +
    +/* Hardware Version is returned as FamilyID.VariantID */
    +static ssize_t mxt_hw_version_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct mxt_data *data = dev_get_drvdata(dev);
    + struct mxt_info *info = &data->info;
    + return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
    + info->family_id, info->variant_id);
    +}
    +
    static ssize_t mxt_object_show(struct device *dev,
    struct device_attribute *attr, char *buf)
    {
    @@ -1024,10 +1044,14 @@ static ssize_t mxt_update_fw_store(struct device *dev,
    return count;
    }

    +static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
    +static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
    static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
    static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);

    static struct attribute *mxt_attrs[] = {
    + &dev_attr_fw_version.attr,
    + &dev_attr_hw_version.attr,
    &dev_attr_object.attr,
    &dev_attr_update_fw.attr,
    NULL
    --
    1.7.7.3


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