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30 lines
1002 B
Diff
30 lines
1002 B
Diff
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From a37a706547897d77b3194fc507b2546197def430 Mon Sep 17 00:00:00 2001
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From: James Hughes <JamesH65@users.noreply.github.com>
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Date: Tue, 17 Sep 2019 16:22:09 +0100
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Subject: [PATCH 804/806] Fix poll rate on touchscreen (#3238)
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Was running at 25Hz, rather than he expected 60. Only been doing it
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for the last 5 years....
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Replace msleep_interruptible with usleep_range as the msleep call
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is not accurate for times < 20ms.
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Fixes: https://github.com/raspberrypi/linux/issues/3227
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Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
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---
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drivers/input/touchscreen/rpi-ft5406.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/input/touchscreen/rpi-ft5406.c
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+++ b/drivers/input/touchscreen/rpi-ft5406.c
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@@ -78,7 +78,7 @@ static int ft5406_thread(void *arg)
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while (!kthread_should_stop()) {
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/* 60fps polling */
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- msleep_interruptible(17);
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+ usleep_range(16600, 16700);
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memcpy_fromio(®s, ts->ts_base, sizeof(struct ft5406_regs));
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iowrite8(99,
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ts->ts_base +
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