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[media] Input: atmel_mxt_ts - add diagnostic data support for mXT1386

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The mXT1386 family of chips have a different architecture which splits
the diagnostic data into 3 columns.

Signed-off-by: Nick Dyer <nick@shmanahar.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nick Dyer 2016-07-18 18:10:35 -03:00 committed by Mauro Carvalho Chehab
parent de601f71e7
commit 566d533a4b
1 changed files with 28 additions and 3 deletions
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31
drivers/input/touchscreen/atmel_mxt_ts.c
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@ -137,6 +137,10 @@ struct t9_range {
#define MXT_DIAGNOSTIC_DELTAS 0x10
#define MXT_DIAGNOSTIC_SIZE 128
#define MXT_FAMILY_1386 160
#define MXT1386_COLUMNS 3
#define MXT1386_PAGES_PER_COLUMN 8
struct t37_debug {
#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
u8 mode;
@ -2140,13 +2144,27 @@ recheck:
static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
unsigned int y)
{
struct mxt_info *info = &data->info;
struct mxt_dbg *dbg = &data->dbg;
unsigned int ofs, page;
unsigned int col = 0;
unsigned int col_width;
ofs = (y + (x * data->info.matrix_ysize)) * sizeof(u16);
if (info->family_id == MXT_FAMILY_1386) {
col_width = info->matrix_ysize / MXT1386_COLUMNS;
col = y / col_width;
y = y % col_width;
} else {
col_width = info->matrix_ysize;
}
ofs = (y + (x * col_width)) * sizeof(u16);
page = ofs / MXT_DIAGNOSTIC_SIZE;
ofs %= MXT_DIAGNOSTIC_SIZE;
if (info->family_id == MXT_FAMILY_1386)
page += col * MXT1386_PAGES_PER_COLUMN;
return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
}
@ -2416,6 +2434,7 @@ static const struct video_device mxt_video_device = {
static void mxt_debug_init(struct mxt_data *data)
{
struct mxt_info *info = &data->info;
struct mxt_dbg *dbg = &data->dbg;
struct mxt_object *object;
int error;
@ -2439,8 +2458,14 @@ static void mxt_debug_init(struct mxt_data *data)
/* Calculate size of data and allocate buffer */
dbg->t37_nodes = data->xsize * data->ysize;
dbg->t37_pages = DIV_ROUND_UP(data->xsize * data->info.matrix_ysize *
sizeof(u16), sizeof(dbg->t37_buf->data));
if (info->family_id == MXT_FAMILY_1386)
dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
else
dbg->t37_pages = DIV_ROUND_UP(data->xsize *
data->info.matrix_ysize *
sizeof(u16),
sizeof(dbg->t37_buf->data));
dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
sizeof(struct t37_debug), GFP_KERNEL);