From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934743AbcLNXOa (ORCPT ); Wed, 14 Dec 2016 18:14:30 -0500 Received: from mail.savoirfairelinux.com ([208.88.110.44]:44896 "EHLO mail.savoirfairelinux.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934101AbcLNXMu (ORCPT ); Wed, 14 Dec 2016 18:12:50 -0500 From: Sebastien Bourdelin To: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, kernel@savoirfairelinux.com Cc: mark@embeddedarm.com, kris@embeddedarm.com, horms+renesas@verge.net.au, treding@nvidia.com, jonathanh@nvidia.com, f.fainelli@gmail.com, fabio.estevam@nxp.com, kernel@pengutronix.de, shawnguo@kernel.org, linux@armlinux.org.uk, linux@roeck-us.net, wim@iguana.be, mark.rutland@arm.com, robh+dt@kernel.org, damien.riegel@savoirfairelinux.com, lucile.quirion@savoirfairelinux.com, olof@lixom.net, arnd@arndb.de, suzuki.poulose@arm.com, linus.walleij@linaro.org, will.deacon@arm.com, yamada.masahiro@socionext.com, Sebastien Bourdelin Subject: [PATCH 3/6] dt-bindings: bus: Add documentation for the Technologic Systems NBUS Date: Wed, 14 Dec 2016 18:12:33 -0500 Message-Id: <20161214231237.17496-4-sebastien.bourdelin@savoirfairelinux.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161214231237.17496-1-sebastien.bourdelin@savoirfairelinux.com> References: <20161214231237.17496-1-sebastien.bourdelin@savoirfairelinux.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add binding documentation for the Technologic Systems NBUS that is used to interface with peripherals in the FPGA of the TS-4600 SoM. Signed-off-by: Sebastien Bourdelin --- Documentation/devicetree/bindings/bus/ts-nbus.txt | 50 +++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/ts-nbus.txt diff --git a/Documentation/devicetree/bindings/bus/ts-nbus.txt b/Documentation/devicetree/bindings/bus/ts-nbus.txt new file mode 100644 index 0000000..2f777ee --- /dev/null +++ b/Documentation/devicetree/bindings/bus/ts-nbus.txt @@ -0,0 +1,50 @@ +Technologic Systems NBUS + +The NBUS is a bus used to interface with peripherals in the Technologic +Systems FPGA on the TS-4600 SoM. + +Required properties : + - compatible : "technologic,ts-nbus", "simple-bus" + - #address-cells : must be 1 + - #size-cells : must be 0 + - pws : The PWM pin connected to the clock line on the FPGA + - data-gpios : The GPIO pin connected to the data line on the FPGA + - csn-gpios : The GPIO pin connected to the csn line on the FPGA + - txrx-gpios : The GPIO pin connected to the txrx line on the FPGA + - strobe-gpios : The GPIO pin connected to the stobe line on the FPGA + - ale-gpios : The GPIO pin connected to the ale line on the FPGA + - rdy-gpios : The GPIO pin connected to the rdy line on the FPGA + +Child nodes: + +The NBUS node can contain zero or more child nodes representing peripherals +on the bus. + +Example: + + nbus { + compatible = "technologic,ts-nbus", "simple-bus"; + pinctrl-0 = <&nbus_pins>; + #address-cells = <1>; + #size-cells = <0>; + pwms = <&pwm 2 83>; + data-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH + &gpio0 1 GPIO_ACTIVE_HIGH + &gpio0 2 GPIO_ACTIVE_HIGH + &gpio0 3 GPIO_ACTIVE_HIGH + &gpio0 4 GPIO_ACTIVE_HIGH + &gpio0 5 GPIO_ACTIVE_HIGH + &gpio0 6 GPIO_ACTIVE_HIGH + &gpio0 7 GPIO_ACTIVE_HIGH>; + csn-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>; + txrx-gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>; + strobe-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>; + ale-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>; + rdy-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>; + + wdt@2a { + compatible = "..."; + + /* ... */ + }; + }; -- 2.10.2