Move PHY initialization until after EHCI initialization is
complete, instead of initializing the PHYs first, shutting
them down again, and then initializing them a second time.
This fixes HSIC device detection.
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
CC: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-omap.c | 32 +++++++++++++++-----------------
1 files changed, 15 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 1ba1df8..755b428 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -90,26 +90,13 @@ static inline u32 ehci_read(void __iomem *base, u32 reg)
static int omap_ehci_init(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- struct omap_hcd *omap = (struct omap_hcd *)ehci->priv;
- int rc, i;
-
- /* Hold PHYs in reset while initializing EHCI controller */
- for (i = 0; i < omap->nports; i++) {
- if (omap->phy[i])
- usb_phy_shutdown(omap->phy[i]);
- }
+ int rc;
/* we know this is the memory we want, no need to ioremap again */
ehci->caps = hcd->regs;
rc = ehci_setup(hcd);
- /* Bring PHYs out of reset */
- for (i = 0; i < omap->nports; i++) {
- if (omap->phy[i])
- usb_phy_init(omap->phy[i]);
- }
-
return rc;
}
@@ -219,9 +206,6 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
}
omap->phy[i] = phy;
- usb_phy_init(omap->phy[i]);
- /* bring PHY out of suspend */
- usb_phy_set_suspend(omap->phy[i], 0);
}
pm_runtime_enable(dev);
@@ -245,6 +229,20 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
goto err_pm_runtime;
}
+ /*
+ * Bring PHYs out of reset.
+ * 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])
+ continue;
+
+ usb_phy_init(omap->phy[i]);
+ /* bring PHY out of suspend */
+ usb_phy_set_suspend(omap->phy[i], 0);
+ }
return 0;
--
1.7.4.1
--
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