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USB: ehci-omap: Tweak PHY initialization sequence

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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@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Cc: stable <stable@vger.kernel.org> # 3.10
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Roger Quadros 2013-06-14 16:52:07 +03:00 committed by Greg Kroah-Hartman
parent 8fefcfdd27
commit 4e5c9e6fa2
1 changed files with 9 additions and 2 deletions
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11
drivers/usb/host/ehci-omap.c
View File

@ -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]);