Allows the driver to turn off the clock during suspend for additional power savings.
Signed-off-by: Michael Welling <[email protected]> --- drivers/usb/host/ehci-atmel.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c index ec9f7b7..004858d 100644 --- a/drivers/usb/host/ehci-atmel.c +++ b/drivers/usb/host/ehci-atmel.c @@ -19,6 +19,7 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> +#include <linux/platform_data/atmel.h> #include <linux/usb.h> #include <linux/usb/hcd.h> @@ -181,6 +182,40 @@ static int ehci_atmel_drv_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int +ehci_atmel_drv_suspend(struct platform_device *pdev, pm_message_t mesg) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + if (device_may_wakeup(&pdev->dev)) + enable_irq_wake(hcd->irq); + + if (at91_suspend_entering_slow_clock()) + atmel_stop_clock(); + + ehci_suspend(hcd, (bool) device_may_wakeup(&pdev->dev)); + return 0; +} + +static int ehci_atmel_drv_resume(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + if (device_may_wakeup(&pdev->dev)) + disable_irq_wake(hcd->irq); + + if (!clocked) + atmel_start_clock(); + + ehci_resume(hcd, false); + return 0; +} +#else +#define ehci_atmel_drv_suspend NULL +#define ehci_atmel_drv_resume NULL +#endif + #ifdef CONFIG_OF static const struct of_device_id atmel_ehci_dt_ids[] = { { .compatible = "atmel,at91sam9g45-ehci" }, @@ -193,6 +228,8 @@ MODULE_DEVICE_TABLE(of, atmel_ehci_dt_ids); static struct platform_driver ehci_atmel_driver = { .probe = ehci_atmel_drv_probe, .remove = ehci_atmel_drv_remove, + .suspend = ehci_atmel_drv_suspend, + .resume = ehci_atmel_drv_resume, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "atmel-ehci", -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
