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Commit 8e19dfb4 authored by Maya Erez's avatar Maya Erez
Browse files

usb: dwc3: Adding support for disabling suspend/resume 



In early stages of new platforms suspend and resume are not
fully supported. Hence, add the ability to disable suspend if
required.

Change-Id: I749932d35fb187729526bbe51692adff8297bdca
Signed-off-by: default avatarMaya Erez <merez@codeaurora.org>
parent 471e6a78

Documentation/devicetree/bindings/usb/msm-ssusb.txt

+2 −0
Original line number Diff line number Diff line
@@ -48,6 +48,8 @@ Optional properties : 
  specified, default of 19.2MHz is assumed.

- qti,reset_hsphy_sleep_clk_on_init: If present, the HSUSB PHY sleep clock is

  being reset in initialization.

- qti,no-suspend-resume: If present, the device will not perform any activity

		during suspend/resume



Sub nodes:

- Sub node for "DWC3- USB3 controller".

drivers/usb/dwc3/dwc3-msm.c

+9 −0
Original line number Diff line number Diff line
@@ -249,6 +249,7 @@ struct dwc3_msm { 
	bool ext_chg_active;

	struct completion ext_chg_wait;

	unsigned int scm_dev_id;

	bool suspend_resume_no_support;

};



#define USB_HSPHY_3P3_VOL_MIN		3050000 /* uV */
@@ -1537,6 +1538,11 @@ static int dwc3_msm_suspend(struct dwc3_msm *mdwc) 


	dev_dbg(mdwc->dev, "%s: entering lpm\n", __func__);



	if (mdwc->suspend_resume_no_support) {

		dev_dbg(mdwc->dev, "%s no support for suspend\n", __func__);

		return -EPERM;

	}



	if (atomic_read(&mdwc->in_lpm)) {

		dev_dbg(mdwc->dev, "%s: Already suspended\n", __func__);

		return 0;
@@ -2514,6 +2520,9 @@ static int dwc3_msm_probe(struct platform_device *pdev) 


	mdwc->charger.skip_chg_detect = of_property_read_bool(node,

				"qti,skip-charger-detection");



	mdwc->suspend_resume_no_support = of_property_read_bool(node,

				"qti,no-suspend-resume");

	/*

	 * DWC3 has separate IRQ line for OTG events (ID/BSV) and for

	 * DP and DM linestate transitions during low power mode.