diff options
Diffstat (limited to 'drivers/usb/roles/intel-xhci-usb-role-switch.c')
| -rw-r--r-- | drivers/usb/roles/intel-xhci-usb-role-switch.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c index 6e922b50b674..1fb3dd0f1dfa 100644 --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c @@ -18,6 +18,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/usb/role.h> /* register definition */ @@ -56,6 +57,8 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) return -EIO; } + pm_runtime_get_sync(dev); + /* Set idpin value as requested */ val = readl(data->base + DUAL_ROLE_CFG0); switch (role) { @@ -84,13 +87,17 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) /* Polling on CFG1 register to confirm mode switch.*/ do { val = readl(data->base + DUAL_ROLE_CFG1); - if (!!(val & HOST_MODE) == (role == USB_ROLE_HOST)) + if (!!(val & HOST_MODE) == (role == USB_ROLE_HOST)) { + pm_runtime_put(dev); return 0; + } /* Interval for polling is set to about 5 - 10 ms */ usleep_range(5000, 10000); } while (time_before(jiffies, timeout)); + pm_runtime_put(dev); + dev_warn(dev, "Timeout waiting for role-switch\n"); return -ETIMEDOUT; } @@ -101,7 +108,9 @@ static enum usb_role intel_xhci_usb_get_role(struct device *dev) enum usb_role role; u32 val; + pm_runtime_get_sync(dev); val = readl(data->base + DUAL_ROLE_CFG0); + pm_runtime_put(dev); if (!(val & SW_IDPIN)) role = USB_ROLE_HOST; @@ -142,6 +151,9 @@ static int intel_xhci_usb_probe(struct platform_device *pdev) if (IS_ERR(data->role_sw)) return PTR_ERR(data->role_sw); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + return 0; } |