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authorChangming Huang <jerry.huang@nxp.com>2016-11-29 08:45:38 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-12-05 17:13:58 +0300
commit9d4b82706357f2eb23f45309227fc94d11eea255 (patch)
tree6cfe74d0824423d75256a71587bec8d73e24b032 /drivers/usb/host/fsl-mph-dr-of.c
parent22547c4cc4fe20698a6a85a55b8788859134b8e4 (diff)
downloadlinux-9d4b82706357f2eb23f45309227fc94d11eea255.tar.xz
fsl/usb: Workarourd for USB erratum-A005697
The EHCI specification states the following in the SUSP bit description: In the Suspend state, the port is sensitive to resume detection. Note that the bit status does not change until the port is suspended and that there may be a delay in suspending a port if there is a transaction currently in progress on the USB. However, in NXP USBDR controller, the PORTSCx[SUSP] bit changes immediately when the application sets it and not when the port is actually suspended. So the application must wait for at least 10 milliseconds after a port indicates that it is suspended, to make sure this port has entered suspended state before initiating this port resume using the Force Port Resume bit. This bit is for NXP controller, not EHCI compatible. Signed-off-by: Changming Huang <jerry.huang@nxp.com> Signed-off-by: Ramneek Mehresh <ramneek.mehresh@nxp.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/fsl-mph-dr-of.c')
-rw-r--r--drivers/usb/host/fsl-mph-dr-of.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index f07ccb25bc24..e90ddb530765 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -226,6 +226,8 @@ static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
of_property_read_bool(np, "fsl,usb-erratum-a007792");
pdata->has_fsl_erratum_a005275 =
of_property_read_bool(np, "fsl,usb-erratum-a005275");
+ pdata->has_fsl_erratum_a005697 =
+ of_property_read_bool(np, "fsl,usb_erratum-a005697");
/*
* Determine whether phy_clk_valid needs to be checked