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SubjectRe: [PATCH v11 5/5] usb: dwc3: qcom: Keep power domain on to retain controller status
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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@quicinc.com>
>> ---
>> 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

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