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usb: dwc3: qcom: Keep power domain on to retain controller status

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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: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Link: https://lore.kernel.org/r/1655094654-24052-6-git-send-email-quic_kriskura@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sandeep Maheswaram 2022-06-13 10:00:54 +05:30 committed by Greg Kroah-Hartman
parent 6895ea55c3
commit d9be8d5c5b
1 changed files with 21 additions and 7 deletions
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28
drivers/usb/dwc3/dwc3-qcom.c
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@ -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>
@ -756,12 +757,13 @@ 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)
@ -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);