Add support for retrieving a single node of data at high rate.
---
drivers/input/touchscreen/atmel_mxt_ts.c | 60 +++++++++++++++++++++++++++++---
1 file changed, 55 insertions(+), 5 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 05bacc6..fd3aaae 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -238,6 +238,7 @@ struct mxt_debug_datatype {
char *name;
char *desc;
char *format;
+ bool single_node;
};
struct mxt_debug_entry {
@@ -262,6 +263,20 @@ static const struct mxt_debug_datatype mxt_dbg_datatypes[] = {
.desc = "Mutual Capacitance Deltas",
.format = "int16",
},
+ {
+ .mode = MXT_DIAGNOSTIC_REFS,
+ .name = "single_node_refs",
+ .desc = "Single Node References",
+ .format = "uint16",
+ .single_node = true,
+ },
+ {
+ .mode = MXT_DIAGNOSTIC_DELTAS,
+ .name = "single_node_deltas",
+ .format = "int16",
+ .desc = "Single Node Deltas",
+ .single_node = true,
+ },
};
struct mxt_dbg {
@@ -270,6 +285,7 @@ struct mxt_dbg {
struct t37_debug *t37_buf;
unsigned int t37_pages;
unsigned int t37_nodes;
+ unsigned int single_node_ofs;
struct dentry *debugfs_dir;
struct mxt_debug_entry entries[ARRAY_SIZE(mxt_dbg_datatypes)];
@@ -2216,14 +2232,16 @@ static int mxt_read_diagnostic_debug(struct seq_file *s, void *d)
struct mxt_dbg *dbg = &data->dbg;
int retries = 0;
int page;
+ int pages = e->datatype->single_node ? 1 : dbg->t37_pages;
int ret;
u8 mode = e->datatype->mode;
u8 cmd = mode;
struct t37_debug *p;
+ u16 val;
mutex_lock(&dbg->dbg_mutex);
- for (page = 0; page < dbg->t37_pages; page++) {
+ for (page = 0; page < pages; page++) {
p = dbg->t37_buf + page;
ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
@@ -2263,7 +2281,14 @@ wait_cmd:
cmd = MXT_DIAGNOSTIC_PAGEUP;
}
- ret = mxt_convert_debug_pages(s, data);
+ if (e->datatype->single_node) {
+ val = get_unaligned_le16(&dbg->t37_buf[0]
+ .data[dbg->single_node_ofs]);
+ seq_write(s, &val, sizeof(u16));
+ ret = 0;
+ } else {
+ ret = mxt_convert_debug_pages(s, data);
+ }
release:
mutex_unlock(&dbg->dbg_mutex);
@@ -2273,7 +2298,12 @@ release:
static int mxt_debugfs_data_open(struct inode *inode, struct file *f)
{
struct mxt_debug_entry *e = inode->i_private;
- size_t size = e->data->dbg.t37_nodes * sizeof(u16);
+ size_t size;
+
+ if (e->datatype->single_node)
+ size = sizeof(u16);
+ else
+ size = e->data->dbg.t37_nodes * sizeof(u16);
return single_open_size(f, mxt_read_diagnostic_debug, e, size);
}
@@ -2291,6 +2321,19 @@ static void mxt_debugfs_remove(struct mxt_data *data)
debugfs_remove_recursive(data->dbg.debugfs_dir);
}
+static void mxt_debugfs_calc_single_node_ofs(struct mxt_data *data)
+{
+ struct mxt_info *info = &data->info;
+ int ofs = data->ysize / 2;
+
+ while ((ofs + info->matrix_ysize) <= (MXT_DIAGNOSTIC_SIZE/sizeof(u16)))
+ ofs += info->matrix_ysize;
+
+ dev_dbg(&data->client->dev, "Single node ofs: %d\n", ofs);
+
+ data->dbg.single_node_ofs = ofs;
+}
+
static void mxt_debugfs_init(struct mxt_data *data)
{
struct mxt_info *info = &data->info;
@@ -2358,6 +2401,8 @@ static void mxt_debugfs_init(struct mxt_data *data)
if (!dbg->t37_buf)
goto error;
+ mxt_debugfs_calc_single_node_ofs(data);
+
for (i = 0; i < ARRAY_SIZE(mxt_dbg_datatypes); i++) {
e = &dbg->entries[i];
e->data = data;
@@ -2368,8 +2413,13 @@ static void mxt_debugfs_init(struct mxt_data *data)
if (!dir)
goto error;
- e->width = data->xyswitch ? data->ysize : data->xsize;
- e->height = data->xyswitch ? data->xsize : data->ysize;
+ if (e->datatype->single_node) {
+ e->width = 1;
+ e->height = 1;
+ } else {
+ e->width = data->xyswitch ? data->ysize : data->xsize;
+ e->height = data->xyswitch ? data->xsize : data->ysize;
+ }
e->format_wrapper.data = (void *)e->datatype->format;
e->format_wrapper.size = strlen(e->datatype->format);
--
2.5.0
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