Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933495AbdCaRDZ (ORCPT ); Fri, 31 Mar 2017 13:03:25 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:27586 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933291AbdCaRDV (ORCPT ); Fri, 31 Mar 2017 13:03:21 -0400 From: Ludovic Barre To: Cyrille Pitchen , Marek Vasut CC: David Woodhouse , Brian Norris , Boris Brezillon , Richard Weinberger , Alexandre Torgue , Rob Herring , , , Subject: [PATCH v2 1/2] dt-bindings: Document the STM32 QSPI bindings Date: Fri, 31 Mar 2017 19:02:03 +0200 Message-ID: <1490979724-10905-2-git-send-email-ludovic.Barre@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1490979724-10905-1-git-send-email-ludovic.Barre@st.com> References: <1490979724-10905-1-git-send-email-ludovic.Barre@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.201.21.195] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-03-31_14:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2146 Lines: 64 From: Ludovic Barre This patch adds documentation of device tree bindings for the STM32 QSPI controller. Signed-off-by: Ludovic Barre --- .../devicetree/bindings/mtd/stm32-quadspi.txt | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/stm32-quadspi.txt diff --git a/Documentation/devicetree/bindings/mtd/stm32-quadspi.txt b/Documentation/devicetree/bindings/mtd/stm32-quadspi.txt new file mode 100644 index 0000000..95a8ebd --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/stm32-quadspi.txt @@ -0,0 +1,45 @@ +* STMicroelectronics Quad Serial Peripheral Interface(QuadSPI) + +Required properties: +- compatible: should be "st,stm32f469-qspi" +- reg: contains the register location and length. + (optional) the memory mapping address and length +- reg-names: list of the names corresponding to the previous register + Should contain "qspi" to register location + (optional) "qspi_mm" if read in memory map mode (improve read throughput) +- interrupts: should contain the interrupt for the device +- clocks: the phandle of the clock needed by the QSPI controller +- A pinctrl must be defined to set pins in mode of operation for QSPI transfer + +Optional properties: +- resets: must contain the phandle to the reset controller. + +A spi flash must be a child of the nor_flash node and could have some +properties. Also see jedec,spi-nor.txt. + +Required properties: +- reg: chip-Select number (QSPI controller may connect 2 nor flashes) +- spi-max-frequency: max frequency of spi bus + +Optional property: +- spi-rx-bus-width: the bus width (number of data wires) + +Example: + +qspi: qspi@a0001000 { + compatible = "st,stm32f469-qspi"; + reg = <0xa0001000 0x1000>, <0x90000000 0x10000000>; + reg-names = "qspi", "qspi_mm"; + interrupts = <91>; + resets = <&rcc STM32F4_AHB3_RESET(QSPI)>; + clocks = <&rcc 0 STM32F4_AHB3_CLOCK(QSPI)>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_qspi0>; + + flash@0 { + reg = <0>; + spi-rx-bus-width = <4>; + spi-max-frequency = <108000000>; + ... + }; +}; -- 2.7.4