[PATCH RFC 8/8] Input: atmel_mxt_ts - create debugfs info file

Nick Dyer
2015-12-02T20:51:21Z

Add a file in debugfs directory with info about the chip.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
---
Documentation/ABI/testing/debugfs-heatmap | 14 ++++++++++++++
drivers/input/touchscreen/atmel_mxt_ts.c | 22 ++++++++++++++++++++++
2 files changed, 36 insertions(+)

diff --git a/Documentation/ABI/testing/debugfs-heatmap b/Documentation/ABI/testing/debugfs-heatmap
index 9246340..95668a5 100644
--- a/Documentation/ABI/testing/debugfs-heatmap
+++ b/Documentation/ABI/testing/debugfs-heatmap
@@ -6,6 +6,13 @@ Description:
A directory will be created under heatmap for each device which
provides heatmap data.

+What: /sys/kernel/debug/heatmap-dev_driver_string-dev_name/info
+Date:
+KernelVersion:
+Contact:
+Description:
+ Info relating to the device, eg hardware/firmware version
+
What: /sys/kernel/debug/heatmap-dev_driver_string-dev_name/datatype/
Date:
KernelVersion:
@@ -48,6 +55,13 @@ Contact:
Description:
Display name for the data.

+What: /sys/kernel/debug/heatmap-xxx/datatype/input_name
+Date:
+KernelVersion:
+Contact:
+Description:
+ The name of the corresponding input device, if relevant.
+
What: /sys/kernel/debug/heatmap-xxx/datatype/data
Date:
KernelVersion:
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index dbe9ebb..34f3d86 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -277,7 +277,10 @@ struct mxt_dbg {
struct dentry *debugfs_dir;
struct dentry *deltas_file;
struct dentry *refs_file;
+ struct debugfs_blob_wrapper input_name_wrapper;
struct mxt_debug_datatype_meta dt_meta[ARRAY_SIZE(datatypes)];
+ char info[50];
+ struct debugfs_blob_wrapper info_wrapper;
};
#endif

@@ -2319,6 +2322,18 @@ static void mxt_debugfs_init(struct mxt_data *data)
return;
}

+ dbg->info_wrapper.data = dbg->info;
+ dbg->info_wrapper.size = sizeof(dbg->info);
+ scnprintf(dbg->info, sizeof(dbg->info),
+ "Family: %u Variant: %u Firmware V%u.%u.%02X",
+ info->family_id, info->variant_id, info->version >> 4,
+ info->version & 0xf, info->build);
+
+ dent = debugfs_create_blob("info", S_IRUGO, dbg->debugfs_dir,
+ &dbg->info_wrapper);
+ if (!dent)
+ goto error;
+
/* Calculate size of data and allocate buffer */
dbg->t37_nodes = data->xsize * data->ysize;

@@ -2383,6 +2398,13 @@ static void mxt_debugfs_init(struct mxt_data *data)
if (!dent)
goto error;

+ dbg->input_name_wrapper.data = (void *)data->input_dev->name;
+ dbg->input_name_wrapper.size = strlen(data->input_dev->name);
+ dent = debugfs_create_blob("input_name", S_IRUGO,
+ dir, &dbg->input_name_wrapper);
+ if (!dent)
+ goto error;
+
dtm->dent = dent;
dent->d_inode->i_size = dbg->t37_nodes * sizeof(u16);
}
--
2.5.0