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Input: atmel_mxt_ts: Add a debugfs attribute to show all objects

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The sysfs attribute show method (mxt_object_show) is limited to show
object information up to (PAGE_SIZE - 1) bytes. We need a way to get
the complete information of all objects. The object information can
be obtained from <debugfs-mount>/atmel_mxt_ts/object.

Change-Id: I92fff75b37ba0cba19b137460c2144fe847c6343
Signed-off-by: Jing Lin <jinglin@codeaurora.org>
This commit is contained in:
Jing Lin
2011-11-02 15:15:30 -07:00
committed by Stephen Boyd
parent 80a0439c94
commit f91cb66b8e
1 changed files with 77 additions and 0 deletions
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77
drivers/input/touchscreen/atmel_mxt_ts.c
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@@ -22,6 +22,8 @@
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/regulator/consumer.h>
#if defined(CONFIG_HAS_EARLYSUSPEND)
@@ -253,6 +255,9 @@
#define MXT_MAX_RW_TRIES 3
#define MXT_BLOCK_SIZE 256
#define MXT_DEBUGFS_DIR "atmel_mxt_ts"
#define MXT_DEBUGFS_FILE "object"
struct mxt_info {
u8 family_id;
u8 variant_id;
@@ -318,6 +323,8 @@ struct mxt_data {
int cfg_version_idx;
};
static struct dentry *debug_base;
static bool mxt_object_readable(unsigned int type)
{
switch (type) {
@@ -1728,6 +1735,72 @@ static const struct dev_pm_ops mxt_pm_ops = {
};
#endif
static int mxt_debugfs_object_show(struct seq_file *m, void *v)
{
struct mxt_data *data = m->private;
struct mxt_object *object;
struct device *dev = &data->client->dev;
int i, j, k;
int error;
int obj_size;
u8 val;
for (i = 0; i < data->info.object_num; i++) {
object = data->object_table + i;
obj_size = object->size + 1;
seq_printf(m, "Object[%d] (Type %d)\n", i + 1, object->type);
for (j = 0; j < object->instances + 1; j++) {
seq_printf(m, "[Instance %d]\n", j);
for (k = 0; k < obj_size; k++) {
error = mxt_read_object(data, object->type,
j * obj_size + k, &val);
if (error) {
dev_err(dev,
"Failed to read object %d "
"instance %d at offset %d\n",
object->type, j, k);
return error;
}
seq_printf(m, "Byte %d: 0x%02x (%d)\n",
k, val, val);
}
}
}
return 0;
}
static int mxt_debugfs_object_open(struct inode *inode, struct file *file)
{
return single_open(file, mxt_debugfs_object_show, inode->i_private);
}
static const struct file_operations mxt_object_fops = {
.owner = THIS_MODULE,
.open = mxt_debugfs_object_open,
.read = seq_read,
.release = single_release,
};
static void __init mxt_debugfs_init(struct mxt_data *data)
{
debug_base = debugfs_create_dir(MXT_DEBUGFS_DIR, NULL);
if (IS_ERR_OR_NULL(debug_base))
pr_err("atmel_mxt_ts: Failed to create debugfs dir\n");
if (IS_ERR_OR_NULL(debugfs_create_file(MXT_DEBUGFS_FILE,
0444,
debug_base,
data,
&mxt_object_fops))) {
pr_err("atmel_mxt_ts: Failed to create object file\n");
debugfs_remove_recursive(debug_base);
}
}
static int __devinit mxt_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -1880,6 +1953,8 @@ static int __devinit mxt_probe(struct i2c_client *client,
register_early_suspend(&data->early_suspend);
#endif
mxt_debugfs_init(data);
return 0;
err_unregister_device:
@@ -1941,6 +2016,8 @@ static int __devexit mxt_remove(struct i2c_client *client)
kfree(data->object_table);
kfree(data);
debugfs_remove_recursive(debug_base);
return 0;
}