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Commit 456aec26 authored by Mayank Rana's avatar Mayank Rana
Browse files

USB: dwc3-msm: Add module param to override USB LPM functionality 



It is required to support USB LPM functionality with particular
composition to allow XO shutdown. This change adds module param
as usb_lpm_override. By default it is not set, set the same as
echo 1 > /sys/module/dwc3_msm/parameters/usb_lpm_override.
This would overrides currently used suspend_resume_no_support
variable and allows USB LPM on USB cable disconnect.

Change-Id: I220e65a714cd3ab5607c18ab459b9376418567c7
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent f2e6c2d4

drivers/usb/dwc3/dwc3-msm.c

+7 −2
Original line number Diff line number Diff line
@@ -76,6 +76,10 @@ static bool prop_chg_detect; 
module_param(prop_chg_detect, bool, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(prop_chg_detect, "Enable Proprietary charger detection");



static bool usb_lpm_override;

module_param(usb_lpm_override, bool, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(usb_lpm_override, "Override no_suspend_resume with USB");



#define USB3_PORTSC		(0x430)

#define PORT_PE			(0x1 << 1)

/**
@@ -1281,9 +1285,10 @@ static int dwc3_msm_suspend(struct dwc3_msm *mdwc) 
	bool host_ss_active;

	bool can_suspend_ssphy;



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

	dev_dbg(mdwc->dev, "%s: entering lpm. usb_lpm_override:%d\n",

					 __func__, usb_lpm_override);



	if (mdwc->suspend_resume_no_support) {

	if (!usb_lpm_override && mdwc->suspend_resume_no_support) {

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

		return -EPERM;

	}