[PATCH] USB: ehci-platform: support EHCIs with transaction translator
From: Joachim Eastwood <hidden>
Date: 2015-05-16 15:17:40
Also in:
linux-devicetree
Subsystem:
open firmware and flattened device tree bindings, the rest, usb ehci driver, usb subsystem · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Alan Stern, Greg Kroah-Hartman
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 <redacted> --- Documentation/devicetree/bindings/usb/usb-ehci.txt | 2 ++ drivers/usb/host/ehci-platform.c | 4 ++++ 2 files changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
index 0b04fdff9d5a..a12d6012a40f 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 d8a75a51d6d4..ba07f16b13e0 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;
--
1.8.0