diff mbox series

[v17,5/5] usb: dwc3: qcom: Keep power domain on to retain controller status

Message ID 1653387228-28110-6-git-send-email-quic_kriskura@quicinc.com
State New
Headers show
Series USB DWC3 host wake up support from system suspend | expand

Commit Message

Krishna Kurapati May 24, 2022, 10:13 a.m. UTC 
From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>

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.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
---
 drivers/usb/dwc3/dwc3-qcom.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 5d5db62..7bffb31 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -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>
@@ -760,12 +761,13 @@  dwc3_qcom_create_urs_usb_platdev(struct device *dev)
 
 static int dwc3_qcom_probe(struct platform_device *pdev)
 {
-	struct device_node	*np = pdev->dev.of_node;
-	struct device		*dev = &pdev->dev;
-	struct dwc3_qcom	*qcom;
-	struct resource		*res, *parent_res = NULL;
-	int			ret, i;
-	bool			ignore_pipe_clk;
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct dwc3_qcom *qcom;
+	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)
@@ -774,6 +776,8 @@  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) {
@@ -881,7 +885,13 @@  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)) {
+		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);