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Commit b19fc9ec authored by Daniel Kurtz's avatar Daniel Kurtz Committed by Henrik Rydberg
Browse files

Input: atmel_mxt_ts - add sysfs entries to read fw and hw version 



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.

Change-Id: I1eddb4bbf5f3f9ae6947a8528598973ddead18cf
Signed-off-by: default avatarDaniel Kurtz <djkurtz@chromium.org>
Signed-off-by: default avatarHenrik Rydberg <rydberg@euromail.se>
parent e0e0269f

drivers/input/touchscreen/atmel_mxt_ts.c

+24 −0
Original line number Diff line number Diff line
@@ -882,6 +882,26 @@ 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_show_instance(char *buf, int count,

				 struct mxt_object *object, int instance,

				 const u8 *val)
@@ -1047,10 +1067,14 @@ 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