This is a note to let you know that I've just added the patch titled
USB: ehci-omap: Tweak PHY initialization sequence
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>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
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>
Cc: stable <stable@xxxxxxxxxxxxxxx> # 3.10
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-omap.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index bafa960..9bd7dfe 100644
--- 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 platform_device *pdev)
}
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 platform_device *pdev)
}
/*
- * 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]);
--
1.8.3.rc0.20.gb99dd2e
--
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