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Commit c8b71218 authored by Alex Sarraf's avatar Alex Sarraf
Browse files

msm: qpnp-haptic: Add Haptic documentation for auto resonance 



Add documentation for auto resonance detection for Linear
Resonance Actuator (LRA), which is a type of vibrator.

Change-Id: Ic53878d3aaabdbfca6d8bbd1646ec2079aecffa8
Signed-off-by: default avatarAlex Sarraf <asarraf@codeaurora.org>
parent 84bfeac2

Documentation/devicetree/bindings/platform/msm/qpnp-haptic.txt

+7 −0
Original line number Diff line number Diff line
@@ -54,6 +54,12 @@ Optional properties when qcom,actuator-type is "lra" 
 - qcom,misc-trim-error-rc19p2-clk-reg-present : boolean, use this if TRIM_ERROR_RC19P2_CLK

				register is present in MISC module. This register holds

				the frequency error in 19.2Mhz RC clock.

 - qcom,lra-auto-res-mode : auto resonance technique, four different modes

			"none" : no auto resonance

			"zxd" : zero crossing based discontinuous method

			"qwd" : quarter wave drive method

			"max-qwd" : Maximum QWD

			"zxd-eop" : ZXD + End of pattern (This is the Default)



Example:

		qcom,haptic@c000 {
@@ -77,4 +83,5 @@ Example: 
			qcom,wave-samples = [3e 3e 3e 3e 3e 3e 3e 3e];

			qcom,wave-rep-cnt = <1>;

			qcom,wave-samp-rep-cnt = <1>;

			qcom,lra-auto-res-mode = "zxd";

		};