This is a note to let you know that I've just added the patch titled
fsl/usb: Resolve PHY_CLK_VLD instability issue for ULPI phy
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fsl-usb-resolve-phy_clk_vld-instability-issue-for-ulpi-phy.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ad1260e9fbf768d6bed227d9604ebee76a84aae3 Mon Sep 17 00:00:00 2001
From: Ramneek Mehresh <ramneek.mehresh@xxxxxxxxxxxxx>
Date: Mon, 16 Sep 2013 15:11:33 +0530
Subject: fsl/usb: Resolve PHY_CLK_VLD instability issue for ULPI phy
From: Ramneek Mehresh <ramneek.mehresh@xxxxxxxxxxxxx>
commit ad1260e9fbf768d6bed227d9604ebee76a84aae3 upstream.
For controller versions greater than 1.6, setting ULPI_PHY_CLK_SEL
bit when USB_EN bit is already set causes instability issues with
PHY_CLK_VLD bit. So USB_EN is set only for IP controller version
below 1.6 before setting ULPI_PHY_CLK_SEL bit
Signed-off-by: Ramneek Mehresh <ramneek.mehresh@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-fsl.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -130,7 +130,7 @@ static int usb_hcd_fsl_probe(const struc
}
/* Enable USB controller, 83xx or 8536 */
- if (pdata->have_sysif_regs)
+ if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6)
setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
/* Don't need to set host mode here. It will be done by tdi_reset() */
@@ -232,15 +232,9 @@ static int ehci_fsl_setup_phy(struct usb
case FSL_USB2_PHY_ULPI:
if (pdata->have_sysif_regs && pdata->controller_ver) {
/* controller version 1.6 or above */
+ clrbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
setbits32(non_ehci + FSL_SOC_USB_CTRL,
- ULPI_PHY_CLK_SEL);
- /*
- * Due to controller issue of PHY_CLK_VALID in ULPI
- * mode, we set USB_CTRL_USB_EN before checking
- * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
- */
- clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
- UTMI_PHY_EN, USB_CTRL_USB_EN);
+ ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN);
}
portsc |= PORT_PTS_ULPI;
break;
Patches currently in stable-queue which might be from ramneek.mehresh@xxxxxxxxxxxxx are
queue-3.10/fsl-usb-resolve-phy_clk_vld-instability-issue-for-ulpi-phy.patch
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