diff mbox series

[7/7] usb: ehci-mx6: configure usb out of suspend state

Message ID 20200629021350.21262-7-peng.fan@nxp.com
State Changes Requested
Delegated to: Stefano Babic
Headers show
Series [1/7] usb: ehci-mx6: Add powerup_fixup implementation | expand

Commit Message

Peng Fan June 29, 2020, 2:13 a.m. UTC
When moving to support partition reboot or android auto on XEN,
linux kernel will runs into runtime suspend state, and the usb
will be configured to low power suspend state by Linux.

Then we reboot and runs into U-Boot, however the usb already in
suspended state and uboot not able to lock the phy pll,
after clearing PHCD to out of suspended state, the phy pll could be
locked and fastboot works.

Suggested-by: Li Jun <jun.li@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/usb/host/ehci-mx6.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 74f6c80d93..041b3da9ac 100644
--- a/drivers/usb/host/ehci-mx6.c
+++ b/drivers/usb/host/ehci-mx6.c
@@ -438,10 +438,17 @@  int __weak board_ehci_power(int port, int on)
 int ehci_mx6_common_init(struct usb_ehci *ehci, int index)
 {
 	int ret;
+	u32 portsc;
 
 	enable_usboh3_clk(1);
 	mdelay(1);
 
+	portsc = readl(&ehci->portsc);
+	if (portsc & PORT_PTS_PHCD) {
+		debug("suspended: portsc %x, enabled it.\n", portsc);
+		clrbits_le32(&ehci->portsc, PORT_PTS_PHCD);
+	}
+
 	/* Do board specific initialization */
 	ret = board_ehci_hcd_init(index);
 	if (ret)