Re: [PATCH v11 5/5] usb: dwc3: qcom: Keep power domain on to retain controller status
From: Sandeep Maheswaram (Temp)
Date: Tue Mar 22 2022 - 05:18:50 EST
Hi Pavan,
On 3/22/2022 2:07 PM, Pavan Kondeti wrote:
Hi Sandeep,
On Tue, Mar 22, 2022 at 12:37:56PM +0530, Sandeep Maheswaram wrote:
Keep the power domain on in order to retail controller status and
to support wakeup from devices.
%s/retail/retain
retain the controller status so that remote wakeup / device connect /
device disconnect events can be detected during suspend.
Will correct in next version.
Signed-off-by: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx>
---
drivers/usb/dwc3/dwc3-qcom.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 9804a19..35087cf 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>
@@ -724,6 +725,7 @@ 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)
@@ -732,6 +734,8 @@ 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) {
@@ -839,6 +843,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
if (ret)
goto interconnect_exit;
+ genpd->flags |= GENPD_FLAG_ALWAYS_ON;
+
device_init_wakeup(&pdev->dev, 1);
qcom->is_suspended = false;
pm_runtime_set_active(dev);
--
2.7.4
Thanks,
Pavan