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| author | Joachim Eastwood <manabian@gmail.com> | 2015-05-16 17:17:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 09:29:36 -0700 |
| commit | 40f2f2a3255314fc826325f49add1a2fbfc811bd (patch) | |
| tree | fff91466214ec45361cb1bf09bdf0ec0e932dddd | |
| parent | ca07e1c1e4a6aed2b2576256b1fdc53a9f87bb40 (diff) | |
| download | op-kernel-dev-40f2f2a3255314fc826325f49add1a2fbfc811bd.zip op-kernel-dev-40f2f2a3255314fc826325f49add1a2fbfc811bd.tar.gz | |
USB: ehci-platform: support EHCIs with transaction translator
Some EHCI controllers have a Transaction Translator built into
the root hub. Support this feature in device tree when using
the ehci-platform driver by adding a feature flag for it.
This is needed to get USB working on NXP LPC18xx/43xx platforms.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/devicetree/bindings/usb/usb-ehci.txt | 2 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-platform.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt index 0b04fdf..a12d601 100644 --- a/Documentation/devicetree/bindings/usb/usb-ehci.txt +++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt @@ -13,6 +13,8 @@ Optional properties: - big-endian-desc : boolean, set this for hcds with big-endian descriptors - big-endian : boolean, for hcds with big-endian-regs + big-endian-desc - needs-reset-on-resume : boolean, set this to force EHCI reset after resume + - has-transaction-translator : boolean, set this if EHCI have a Transaction + Translator built into the root hub. - clocks : a list of phandle + clock specifier pairs - phys : phandle + phy specifier pair - phy-names : "usb" diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c index d8a75a5..ba07f16 100644 --- a/drivers/usb/host/ehci-platform.c +++ b/drivers/usb/host/ehci-platform.c @@ -202,6 +202,10 @@ static int ehci_platform_probe(struct platform_device *dev) "needs-reset-on-resume")) pdata->reset_on_resume = 1; + if (of_property_read_bool(dev->dev.of_node, + "has-transaction-translator")) + pdata->has_tt = 1; + priv->num_phys = of_count_phandle_with_args(dev->dev.of_node, "phys", "#phy-cells"); priv->num_phys = priv->num_phys > 0 ? priv->num_phys : 1; |
