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authorXu Yang <xu.yang_2@nxp.com>2022-10-13 17:14:37 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-10-23 14:34:53 +0200
commit2f64d6a6cdfbd992e8a8c481ebf79bfa9a71325b (patch)
tree210d11e9026b54c9fbadebf8af0b9c30ba18a92b /drivers/usb/chipidea
parentusb: chipidea: core: handle suspend/resume for each role (diff)
downloadlinux-2f64d6a6cdfbd992e8a8c481ebf79bfa9a71325b.tar.xz
linux-2f64d6a6cdfbd992e8a8c481ebf79bfa9a71325b.zip
usb: chipidea: host: add suspend/resume support for host controller
The controller's power may be powered off during system suspend. This will add suspend/resume support when the controller suffers power lost. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> Link: https://lore.kernel.org/r/20221013151442.3262951-4-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea')
-rw-r--r--drivers/usb/chipidea/host.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index bc3634a54c6b..ebe7400243b1 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -459,6 +459,18 @@ static void ci_hdrc_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
ci_hdrc_free_dma_aligned_buffer(urb);
}
+#ifdef CONFIG_PM_SLEEP
+static void ci_hdrc_host_suspend(struct ci_hdrc *ci)
+{
+ ehci_suspend(ci->hcd, device_may_wakeup(ci->dev));
+}
+
+static void ci_hdrc_host_resume(struct ci_hdrc *ci, bool power_lost)
+{
+ ehci_resume(ci->hcd, power_lost);
+}
+#endif
+
int ci_hdrc_host_init(struct ci_hdrc *ci)
{
struct ci_role_driver *rdrv;
@@ -472,6 +484,10 @@ int ci_hdrc_host_init(struct ci_hdrc *ci)
rdrv->start = host_start;
rdrv->stop = host_stop;
+#ifdef CONFIG_PM_SLEEP
+ rdrv->suspend = ci_hdrc_host_suspend;
+ rdrv->resume = ci_hdrc_host_resume;
+#endif
rdrv->irq = host_irq;
rdrv->name = "host";
ci->roles[CI_ROLE_HOST] = rdrv;