Commit d9be8d5c authored by Sandeep Maheswaram's avatar Sandeep Maheswaram Committed by Greg Kroah-Hartman
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usb: dwc3: qcom: Keep power domain on to retain controller status 



If dwc3 is wakeup capable, keep the power domain always ON so that
wakeup from system suspend can be supported. Otherwise, keep the
power domain ON only during runtime suspend to support wakeup from
runtime suspend.

Reviewed-by: default avatarPavankumar Kondeti <quic_pkondeti@quicinc.com>
Signed-off-by: default avatarSandeep Maheswaram <quic_c_sanm@quicinc.com>
Signed-off-by: default avatarKrishna Kurapati <quic_kriskura@quicinc.com>
Link: https://lore.kernel.org/r/1655094654-24052-6-git-send-email-quic_kriskura@quicinc.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6895ea55

drivers/usb/dwc3/dwc3-qcom.c

+21 −7
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/phy/phy.h>

#include <linux/pm_domain.h>

#include <linux/usb/of.h>

#include <linux/reset.h>

#include <linux/iopoll.h>
@@ -762,6 +763,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev) 
	struct resource	*res, *parent_res = NULL;

	int ret, i;

	bool ignore_pipe_clk;

	struct generic_pm_domain *genpd;



	qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);

	if (!qcom)
@@ -770,6 +772,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev) 
	platform_set_drvdata(pdev, qcom);

	qcom->dev = &pdev->dev;



	genpd = pd_to_genpd(qcom->dev->pm_domain);



	if (has_acpi_companion(dev)) {

		qcom->acpi_pdata = acpi_device_get_match_data(dev);

		if (!qcom->acpi_pdata) {
@@ -877,7 +881,17 @@ static int dwc3_qcom_probe(struct platform_device *pdev) 
	if (ret)

		goto interconnect_exit;



	device_init_wakeup(&pdev->dev, 1);

	if (device_can_wakeup(&qcom->dwc3->dev)) {

		/*

		 * Setting GENPD_FLAG_ALWAYS_ON flag takes care of keeping

		 * genpd on in both runtime suspend and system suspend cases.

		 */

		genpd->flags |= GENPD_FLAG_ALWAYS_ON;

		device_init_wakeup(&pdev->dev, true);

	} else {

		genpd->flags |= GENPD_FLAG_RPM_ALWAYS_ON;

	}



	qcom->is_suspended = false;

	pm_runtime_set_active(dev);

	pm_runtime_enable(dev);