This is a note to let you know that I've just added the patch titled
USB: ehci-omap: Tweak PHY initialization sequence
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:
usb-ehci-omap-tweak-phy-initialization-sequence.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 4e5c9e6fa2d232a0686d5fe45cd1508484048936 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@xxxxxx>
Date: Fri, 14 Jun 2013 16:52:07 +0300
Subject: USB: ehci-omap: Tweak PHY initialization sequence
From: Roger Quadros <rogerq@xxxxxx>
commit 4e5c9e6fa2d232a0686d5fe45cd1508484048936 upstream.
For PHY mode, the PHYs must be brought out of reset
before the EHCI controller is started.
This patch fixes the issue where USB devices are not found
on Beagleboard/Beagle-xm if USB has been started previously
by the bootloader. (e.g. by "usb start" command in u-boot)
Tested on Beagleboard, Beagleboard-xm and Pandaboard.
Issue present on 3.10 onwards.
Reported-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Tested-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-omap.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -187,6 +187,12 @@ static int ehci_hcd_omap_probe(struct pl
}
omap->phy[i] = phy;
+
+ if (pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY) {
+ usb_phy_init(omap->phy[i]);
+ /* bring PHY out of suspend */
+ usb_phy_set_suspend(omap->phy[i], 0);
+ }
}
pm_runtime_enable(dev);
@@ -211,13 +217,14 @@ static int ehci_hcd_omap_probe(struct pl
}
/*
- * Bring PHYs out of reset.
+ * Bring PHYs out of reset for non PHY modes.
* Even though HSIC mode is a PHY-less mode, the reset
* line exists between the chips and can be modelled
* as a PHY device for reset control.
*/
for (i = 0; i < omap->nports; i++) {
- if (!omap->phy[i])
+ if (!omap->phy[i] ||
+ pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY)
continue;
usb_phy_init(omap->phy[i]);
Patches currently in stable-queue which might be from rogerq@xxxxxx are
queue-3.10/usb-ehci-omap-tweak-phy-initialization-sequence.patch
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