@@ -168,9 +168,9 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
struct edt_ft5x06_ts_data *tsdata = dev_id;
struct device *dev = &tsdata->client->dev;
u8 cmd;
- u8 rdbuf[29];
+ u8 rdbuf[31];
int i, type, x, y, id;
- int offset, tplen, datalen;
+ int offset, tplen, datalen, crclen;
int error;
switch (tsdata->version) {
@@ -178,14 +178,18 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
cmd = 0xf9; /* tell the controller to send touch data */
offset = 5; /* where the actual touch data starts */
tplen = 4; /* data comes in so called frames */
- datalen = 26; /* how much bytes to listen for */
+ crclen = 1; /* length of the crc data */
+
+ /* how many bytes to listen for */
+ datalen = tplen * MAX_SUPPORT_POINTS + offset + crclen;
break;
case M09:
cmd = 0x02;
offset = 1;
tplen = 6;
- datalen = 29;
+ crclen = 0;
+ datalen = tplen * MAX_SUPPORT_POINTS + offset + crclen;
break;
default:
Calculate the amount of data that needs to be read for the specified max number of support points. If the maximum number of support points changes then the amount that is read from the touch screen controller should reflect this. Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com> --- Changes since RFC: Added crclen variable Simplified datalen algorithm drivers/input/touchscreen/edt-ft5x06.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)