DRV2605L Continuous Haptic Feedback Support (#6461)

* provide means to turn on RTP mode and set the amplitude

* new keycode HPT_CONT to turn RTP off/on

* introduce new keycodes HPT_CONI, and HPT_COND for Haptic Continuous Increase and Decrease

* support for continuous mode amplitude increase and decrease

* code cleanup

* update docs to reference new keycodes and functionality

* don't touch the keymaps

* add function prototypes

* add proper guards

* cleanup guards

* remove extra reserved

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/haptic/DRV2605L.c b/drivers/haptic/DRV2605L.c
index f74c96525..728554b01 100644
--- a/drivers/haptic/DRV2605L.c
+++ b/drivers/haptic/DRV2605L.c
@@ -114,6 +114,17 @@ void DRV_init(void) {
     DRV_write(DRV_GO, 0x01);
 }
 
+void DRV_rtp_init(void) {
+  DRV_write(DRV_GO, 0x00);
+  DRV_write(DRV_RTP_INPUT, 20); //20 is the lowest value I've found where haptics can still be felt. 
+  DRV_write(DRV_MODE, 0x05); 
+  DRV_write(DRV_GO, 0x01);
+}
+
+void DRV_amplitude(uint8_t amplitude) {
+  DRV_write(DRV_RTP_INPUT, amplitude);
+}
+
 void DRV_pulse(uint8_t sequence) {
     DRV_write(DRV_GO, 0x00);
     DRV_write(DRV_WAVEFORM_SEQ_1, sequence);