linux-kernel - [PATCH v2 1/9] of: Add NVIDIA Tegra XUSB mailbox binding

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Message-Id: <1408381705-3623-2-git-send-email-abrestic@chromium.org>
Date:	Mon, 18 Aug 2014 10:08:17 -0700
From:	Andrew Bresticker <abrestic@...omium.org>
To:	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	linux-tegra@...r.kernel.org
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Grant Likely <grant.likely@...aro.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Arnd Bergmann <arnd@...db.de>,
	Kishon Vijay Abraham I <kishon@...com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
	Andrew Bresticker <abrestic@...omium.org>
Subject: [PATCH v2 1/9] of: Add NVIDIA Tegra XUSB mailbox binding

Add device-tree bindings for the Tegra XUSB mailbox which will be used
for communication between the Tegra xHCI controller's firmware and the
host processor.

Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
---
Changes from v1:
 - Updated to use common mailbox bindings.
---
 .../bindings/mailbox/nvidia,tegra124-xusb-mbox.txt | 30 ++++++++++++++++++++++
 include/dt-bindings/mailbox/tegra-xusb-mailbox.h   |  7 +++++
 2 files changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
 create mode 100644 include/dt-bindings/mailbox/tegra-xusb-mailbox.h

diff --git a/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt b/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
new file mode 100644
index 0000000..c46219b
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
@@ -0,0 +1,30 @@
+NVIDIA Tegra XUSB mailbox
+=========================
+
+The Tegra XUSB mailbox is used by the Tegra xHCI controller's firmware to
+communicate requests to the host and PHY drivers.
+
+Required properties:
+--------------------
+ - compatible: Should be "nvidia,tegra124-xusb-mbox".
+ - reg: Address and length of the XUSB FPCI registers.
+ - interrupts: XUSB mailbox interrupt.
+ - #mbox-cells: Should be 1.  The specifier is the index of the mailbox to
+   reference.  See <dt-bindings/mailbox/tegra-xusb-mailbox.h> for the list
+   of valid values.
+
+Example:
+--------
+	mbox: mailbox@0,70098000 {
+		compatible = "nvidia,tegra124-xusb-mbox";
+		reg = <0x0 0x70098000 0x0 0x1000>;
+		interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+
+		#mbox-cells = <1>;
+	};
+
+	usb@0,70090000 {
+		...
+		mboxes = <&mbox TEGRA_XUSB_MBOX_CHAN_HOST>;
+		...
+	};
diff --git a/include/dt-bindings/mailbox/tegra-xusb-mailbox.h b/include/dt-bindings/mailbox/tegra-xusb-mailbox.h
new file mode 100644
index 0000000..59de6b0
--- /dev/null
+++ b/include/dt-bindings/mailbox/tegra-xusb-mailbox.h
@@ -0,0 +1,7 @@
+#ifndef _DT_BINDINGS_TEGRA_XUSB_MAILBOX_H
+#define _DT_BINDINGS_TEGRA_XUSB_MAILBOX_H
+
+#define TEGRA_XUSB_MBOX_CHAN_HOST	0
+#define TEGRA_XUSB_MBOX_CHAN_PHY	1
+
+#endif /* _DT_BINDINGS_TEGRA_XUSB_MAILBOX_H */
-- 
2.1.0.rc2.206.gedb03e5

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