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Commit 1f3252c6 authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

ARM: dts: msm: Add OTG related regulators for msm8992 



During DC charging, some devices may want to support USB OTG
with an external boost. The PMI8994 has a 5V audio boost that
can be utilized  to provide the 5V that OTG requires.

Add the usb_otg_switch fixed regulator to enable the switch that
connects the boost with USBIN via PMI8994 GPIO 5.

Add the smbcharger_external_otg regulator to disable the usb
charge path when the 5V is provided.

The layout of the regulator supply chain will be the following:
	- usb_otg_switch
		- fixed regulator that controls gpio to enable or
		  disable OVP FET
	- supplied by: smbcharger_external_otg
		- smbcharger regulator that disables usb charging
		  and USB source detect
	- supplied by: pmi8994_boost_5v
		- rpm regulator that enables the 5V smart boost in
		  the PMI8994.

The usb_otg_switch can be used in place of smbcharger_charger_otg
to provide the 5V in place of the charger operating in reverse if
specified in the device tree.

Change-Id: I9672c2f98369582b4a862e86dee05ab48183a380
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 8aabde83

arch/arm/boot/dts/qcom/msm8992-regulator.dtsi

+19 −0
Original line number Diff line number Diff line
@@ -537,4 +537,23 @@ 
			qcom,always-send-voltage;

		};

	};



	usb_otg_switch: usb-otg-switch {

		compatible = "regulator-fixed";

		regulator-name = "usb_otg_vreg";

		vin-supply = <&smbcharger_external_otg>;

		enable-active-high;

		gpio = <&pmi8994_gpios 5 0>;

	};

};



&pmi8994_charger {

	otg-parent-supply = <&pmi8994_boost_5v>;

	smbcharger_charger_otg: qcom,smbcharger-boost-otg {

		regulator-name = "smbcharger_charger_otg";

	};



	smbcharger_external_otg: qcom,smbcharger-external-otg {

		regulator-name = "smbcharger_external_otg";

	};

};