102 lines
3.3 KiB
Diff
102 lines
3.3 KiB
Diff
From patchwork Tue Jul 30 20:21:08 2013
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [v3] Documentation: dt: bindings: TI WiLink modules
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From: Luciano Coelho <coelho@ti.com>
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X-Patchwork-Id: 2835914
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Message-Id: <1375215668-29171-1-git-send-email-coelho@ti.com>
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To: <devicetree@vger.kernel.org>, <linux-doc@vger.kernel.org>
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Cc: <mturquette@linaro.org>, <mark.rutland@arm.com>, <balbi@ti.com>,
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<grant.likely@linaro.org>, <rob.herring@calxeda.com>,
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<linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>,
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<linux-wireless@vger.kernel.org>,
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<linux-arm-kernel@lists.infradead.org>, <tony@atomide.com>,
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<nm@ti.com>, <laurent.pinchart@ideasonboard.com>
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Date: Tue, 30 Jul 2013 23:21:08 +0300
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Add device tree bindings documentation for the TI WiLink modules.
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Currently only the WLAN part of the WiLink6, WiLink7 and WiLink8
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modules is supported.
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Signed-off-by: Luciano Coelho <coelho@ti.com>
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Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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---
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In v3, use IRQ_TYPE_LEVEL_HIGH in the example, as suggested by Laurent.
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.../devicetree/bindings/net/wireless/ti-wilink.txt | 68 ++++++++++++++++++++++
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1 file changed, 68 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/net/wireless/ti-wilink.txt
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/net/wireless/ti-wilink.txt
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@@ -0,0 +1,68 @@
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+TI WiLink Wireless Modules Device Tree Bindings
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+===============================================
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+
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+The WiLink modules provide wireless connectivity, such as WLAN,
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+Bluetooth, FM and NFC.
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+
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+There are several different modules available, which can be grouped by
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+their generation: WiLink6, WiLink7 and WiLink8. WiLink4 is not
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+currently supported with device tree.
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+
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+Currently, only the WLAN portion of the modules is supported with
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+device tree.
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+
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+Required properties:
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+--------------------
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+
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+- compatible: should be "ti,wilink6", "ti,wilink7" or "ti,wilink8"
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+- interrupt-parent: the interrupt controller
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+- interrupts: out-of-band WLAN interrupt
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+ See the interrupt controller's bindings documentation for
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+ detailed definition.
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+
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+Optional properties:
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+--------------------
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+
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+- clocks: list of clocks needed by the chip as follows:
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+
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+ refclock: the internal WLAN reference clock frequency (required for
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+ WiLink6 and WiLink7; not used for WiLink8).
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+
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+ tcxoclock: the internal WLAN TCXO clock frequency (required for
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+ WiLink7 not used for WiLink6 and WiLink8).
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+
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+ The clocks must be defined and named accordingly. For example:
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+
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+ clocks = <&refclock>
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+ clock-names = "refclock";
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+
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+ refclock: refclock {
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+ compatible = "ti,wilink-clock";
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+ #clock-cells = <0>;
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+ clock-frequency = <38400000>;
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+ };
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+
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+ Some modules that contain the WiLink chip provide clocks in the
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+ module itself. In this case, we define a "ti,wilink-clock" as shown
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+ above. But any other clock could in theory be used, so the proper
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+ clock definition should be used.
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+
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+
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+Example:
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+--------
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+
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+Example definition that can be used in OMAP4 Panda:
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+
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+wlan {
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+ compatible = "ti,wilink6";
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+ interrupt-parent = <&gpio2>;
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+ interrupts = <21 IRQ_TYPE_LEVEL_HIGH>; /* gpio line 53 */
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+ clocks = <&refclock>;
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+ clock-names = "refclock";
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+
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+ refclock: refclock {
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+ compatible = "ti,wilink-clock";
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+ #clock-cells = <0>;
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+ clock-frequency = <38400000>;
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+ };
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+};
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