[3.11.y.z extended stable] Patch "fsl-usb: do not test for PHY_CLK_VALID bit on controller version 1.6" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Wed May 14 14:57:31 UTC 2014

This is a note to let you know that I have just added a patch titled

    fsl-usb: do not test for PHY_CLK_VALID bit on controller version 1.6

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see



>From b4c23fc9b8dcb639de74e2aee55e6266ee464a11 Mon Sep 17 00:00:00 2001
From: Nikita Yushchenko <nyushchenko at dev.rtsoft.ru>
Date: Mon, 28 Apr 2014 19:23:44 +0400
Subject: fsl-usb: do not test for PHY_CLK_VALID bit on controller version 1.6

commit d183c81929beeba842b74422f754446ef2b8b49c upstream.

Per reference manuals of Freescale P1020 and P2020 SoCs, USB controller
present in these SoCs has bit 17 of USBx_CONTROL register marked as
Reserved - there is no PHY_CLK_VALID bit there.

Testing for this bit in ehci_fsl_setup_phy() behaves differently on two
P1020RDB boards available here - on one board test passes and fsl-usb
init succeeds, but on other board test fails, causing fsl-usb init to

This patch changes ehci_fsl_setup_phy() not to test PHY_CLK_VALID on
controller version 1.6 that (per manual) does not have this bit.

Signed-off-by: Nikita Yushchenko <nyushchenko at dev.rtsoft.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/usb/host/ehci-fsl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 87c1a2e..164e381 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -261,7 +261,8 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,

-	if (pdata->have_sysif_regs && pdata->controller_ver &&
+	if (pdata->have_sysif_regs &&
+	    pdata->controller_ver > FSL_USB_VER_1_6 &&
 	    (phy_mode == FSL_USB2_PHY_ULPI)) {
 		/* check PHY_CLK_VALID to get phy clk valid */
 		if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &

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