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usb: cdns3: add quirk for enable runtime pm by default 

Some vendors (eg: NXP) may want to enable runtime pm by default for
power saving, add one quirk for it.

Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Peter Chen 2020-09-28 15:20:03 +08:00
parent 1cc6edd8a9
commit 7cea965775
No known key found for this signature in database
GPG Key ID: 4859298150D671BB
3 changed files with 23 additions and 4 deletions
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3
drivers/usb/cdns3/core.c
View File

@ -559,7 +559,8 @@ static int cdns3_probe(struct platform_device *pdev)
device_set_wakeup_capable(dev, true);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_forbid(dev);
if (!(cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
pm_runtime_forbid(dev);
/*
* The controller needs less time between bus and controller suspend,

4
drivers/usb/cdns3/core.h
View File

@ -42,6 +42,8 @@ struct cdns3_role_driver {
struct cdns3_platform_data {
int (*platform_suspend)(struct device *dev,
bool suspend, bool wakeup);
unsigned long quirks;
#define CDNS3_DEFAULT_PM_RUNTIME_ALLOW BIT(0)
};
/**
@ -73,6 +75,7 @@ struct cdns3_platform_data {
* @wakeup_pending: wakeup interrupt pending
* @pdata: platform data from glue layer
* @lock: spinlock structure
* @xhci_plat_data: xhci private data structure pointer
*/
struct cdns3 {
struct device *dev;
@ -106,6 +109,7 @@ struct cdns3 {
bool wakeup_pending;
struct cdns3_platform_data *pdata;
spinlock_t lock;
struct xhci_plat_priv *xhci_plat_data;
};
int cdns3_hw_role_switch(struct cdns3 *cdns);

20
drivers/usb/cdns3/host.c
View File

@ -52,15 +52,25 @@ static int __cdns3_host_init(struct cdns3 *cdns)
goto err1;
}
ret = platform_device_add_data(xhci, &xhci_plat_cdns3_xhci,
cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci,
sizeof(struct xhci_plat_priv), GFP_KERNEL);
if (!cdns->xhci_plat_data) {
ret = -ENOMEM;
goto err1;
}
if (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)
cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
ret = platform_device_add_data(xhci, cdns->xhci_plat_data,
sizeof(struct xhci_plat_priv));
if (ret)
goto err1;
goto free_memory;
ret = platform_device_add(xhci);
if (ret) {
dev_err(cdns->dev, "failed to register xHCI device\n");
goto err1;
goto free_memory;
}
/* Glue needs to access xHCI region register for Power management */
@ -69,6 +79,9 @@ static int __cdns3_host_init(struct cdns3 *cdns)
cdns->xhci_regs = hcd->regs;
return 0;
free_memory:
kfree(cdns->xhci_plat_data);
err1:
platform_device_put(xhci);
return ret;
@ -102,6 +115,7 @@ int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
static void cdns3_host_exit(struct cdns3 *cdns)
{
kfree(cdns->xhci_plat_data);
platform_device_unregister(cdns->host_dev);
cdns->host_dev = NULL;
cdns3_drd_host_off(cdns);