Update the copyright notice with the current year and add a note
about values for controlling the Dualshock 4 reporting rate.
Processing reports at the default full rate of 1000hz can be too
demanding for some low-power embedded processors so noting
alternate values for people working with this hardware can be useful.
Thanks to Rostislav Pehlivanov for finding these values.
Signed-off-by: Frank Praznik <frank.praznik@xxxxxxxxx>
---
drivers/hid/hid-sony.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 9b96f95..9bf4e36 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -8,7 +8,7 @@
* Copyright (c) 2012 David Dillow <dave@xxxxxxxxxxxxxx>
* Copyright (c) 2006-2013 Jiri Kosina
* Copyright (c) 2013 Colin Leitner <colin.leitner@xxxxxxxxx>
- * Copyright (c) 2014 Frank Praznik <frank.praznik@xxxxxxxxx>
+ * Copyright (c) 2014-2016 Frank Praznik <frank.praznik@xxxxxxxxx>
*/
/*
@@ -1879,6 +1879,17 @@ static void dualshock4_send_output_report(struct sony_sc *sc)
u8 *buf = sc->output_report_dmabuf;
int offset;
+ /*
+ * NOTE: The buf[1] field of the Bluetooth report controls
+ * the Dualshock 4 reporting rate.
+ *
+ * Known values include:
+ *
+ * 0x80 - 1000hz (full speed)
+ * 0xA0 - 31hz
+ * 0xB0 - 20hz
+ * 0xD0 - 66hz
+ */
if (sc->quirks & DUALSHOCK4_CONTROLLER_USB) {
memset(buf, 0, DS4_REPORT_0x05_SIZE);
buf[0] = 0x05;
--
2.7.4
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