target/linux/brcm2708/patches-4.19/950-0700-Fix-poll-rate-on-touchscreen-3238.patch

   1 From a37a706547897d77b3194fc507b2546197def430 Mon Sep 17 00:00:00 2001
   2 From: James Hughes <JamesH65@users.noreply.github.com>
   3 Date: Tue, 17 Sep 2019 16:22:09 +0100
   4 Subject: [PATCH] Fix poll rate on touchscreen (#3238)
   5
   6 Was running at 25Hz, rather than he expected 60. Only been doing it
   7 for the last 5 years....
   8
   9 Replace msleep_interruptible with usleep_range as the msleep call
  10 is not accurate for times < 20ms.
  11
  12 Fixes: https://github.com/raspberrypi/linux/issues/3227
  13
  14 Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
  15 ---
  16  drivers/input/touchscreen/rpi-ft5406.c | 2 +-
  17  1 file changed, 1 insertion(+), 1 deletion(-)
  18
  19 --- a/drivers/input/touchscreen/rpi-ft5406.c
  20 +++ b/drivers/input/touchscreen/rpi-ft5406.c
  21 @@ -78,7 +78,7 @@ static int ft5406_thread(void *arg)
  22
  23         while (!kthread_should_stop()) {
  24                 /* 60fps polling */
  25 -               msleep_interruptible(17);
  26 +               usleep_range(16600, 16700);
  27                 memcpy_fromio(&regs, ts->ts_base, sizeof(struct ft5406_regs));
  28                 iowrite8(99,
  29                          ts->ts_base +