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usb: cdns3: add power lost support for system resume

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If the controller lost its power during the system suspend, we need
to do all initialiation operations.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Frank Li <frank.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@kernel.org>
This commit is contained in:
Frank Li
2021-02-18 16:51:08 -06:00
committed by Peter Chen
parent 14d34d2dbb
commit 2cf2581cd2
5 changed files with 68 additions and 3 deletions
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23
drivers/usb/cdns3/cdns3-plat.c
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@@ -19,6 +19,7 @@
#include "core.h"
#include "gadget-export.h"
#include "drd.h"
static int set_phy_power_on(struct cdns *cdns)
{
@@ -236,6 +237,18 @@ static int cdns3_controller_resume(struct device *dev, pm_message_t msg)
if (!cdns->in_lpm)
return 0;
if (cdns_power_is_lost(cdns)) {
phy_exit(cdns->usb2_phy);
ret = phy_init(cdns->usb2_phy);
if (ret)
return ret;
phy_exit(cdns->usb3_phy);
ret = phy_init(cdns->usb3_phy);
if (ret)
return ret;
}
ret = set_phy_power_on(cdns);
if (ret)
return ret;
@@ -270,10 +283,18 @@ static int cdns3_plat_runtime_resume(struct device *dev)
static int cdns3_plat_suspend(struct device *dev)
{
struct cdns *cdns = dev_get_drvdata(dev);
int ret;
cdns_suspend(cdns);
return cdns3_controller_suspend(dev, PMSG_SUSPEND);
ret = cdns3_controller_suspend(dev, PMSG_SUSPEND);
if (ret)
return ret;
if (device_may_wakeup(dev) && cdns->wakeup_irq)
enable_irq_wake(cdns->wakeup_irq);
return ret;
}
static int cdns3_plat_resume(struct device *dev)