From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751106AbdAXWT5 (ORCPT ); Tue, 24 Jan 2017 17:19:57 -0500 Received: from mail-pg0-f66.google.com ([74.125.83.66]:33514 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751065AbdAXWTy (ORCPT ); Tue, 24 Jan 2017 17:19:54 -0500 From: Joshua Clayton To: Alan Tull , Moritz Fischer , Russell King , Shawn Guo , Sascha Hauer , Fabio Estevam Cc: Mark Rutland , Rob Herring , Anatolij Gustschin , Joshua Clayton , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fpga@vger.kernel.org Subject: [PATCH v9 1/3] doc: dt: add cyclone-ps-spi binding document Date: Tue, 24 Jan 2017 14:19:32 -0800 Message-Id: <910cf70128e0303d3642d6ff527a069ad6e18bf7.1485295905.git.stillcompiling@gmail.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Describe a cyclone-ps-spi devicetree entry, required features Signed-off-by: Joshua Clayton --- .../bindings/fpga/altera-passive-serial.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/altera-passive-serial.txt diff --git a/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt new file mode 100644 index 0000000..774e6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt @@ -0,0 +1,29 @@ +Altera Cyclone Passive Serial SPI FPGA Manager + +Altera Cyclone FPGAs support a method of loading the bitstream over what is +referred to as "passive serial". +The passive serial link is not technically spi, and might require extra +circuits in order to play nicely with other spi slaves on the same bus. + +See https://www.altera.com/literature/hb/cyc/cyc_c51013.pdf + +Required properties: +- compatible: should contain "altr,fpga-passive-serial" +- reg: spi chip select of the FPGA +- nconfig-gpios: config pin (referred to as nCONFIG in the cyclone manual) +- nstat-gpios: status pin (referred to as nSTATUS in the cyclone manual) + +Optional properties: +- confd-gpios: confd pin (referred to as CONF_DONE in the cyclone manual) + + + +Example: + fpga_spi: evi-fpga-spi@0 { + compatible = "altr,cyclone-ps-spi-fpga-mgr"; + spi-max-frequency = <20000000>; + reg = <0>; + nconfig-gpios = <&gpio4 9 GPIO_ACTIVE_LOW>; + nstat-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>; + confd-gpios = <&gpio4 12 GPIO_ACTIVE_LOW>; + }; -- 2.9.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: stillcompiling@gmail.com (Joshua Clayton) Date: Tue, 24 Jan 2017 14:19:32 -0800 Subject: [PATCH v9 1/3] doc: dt: add cyclone-ps-spi binding document In-Reply-To: References: Message-ID: <910cf70128e0303d3642d6ff527a069ad6e18bf7.1485295905.git.stillcompiling@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Describe a cyclone-ps-spi devicetree entry, required features Signed-off-by: Joshua Clayton --- .../bindings/fpga/altera-passive-serial.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/altera-passive-serial.txt diff --git a/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt new file mode 100644 index 0000000..774e6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/fpga/altera-passive-serial.txt @@ -0,0 +1,29 @@ +Altera Cyclone Passive Serial SPI FPGA Manager + +Altera Cyclone FPGAs support a method of loading the bitstream over what is +referred to as "passive serial". +The passive serial link is not technically spi, and might require extra +circuits in order to play nicely with other spi slaves on the same bus. + +See https://www.altera.com/literature/hb/cyc/cyc_c51013.pdf + +Required properties: +- compatible: should contain "altr,fpga-passive-serial" +- reg: spi chip select of the FPGA +- nconfig-gpios: config pin (referred to as nCONFIG in the cyclone manual) +- nstat-gpios: status pin (referred to as nSTATUS in the cyclone manual) + +Optional properties: +- confd-gpios: confd pin (referred to as CONF_DONE in the cyclone manual) + + + +Example: + fpga_spi: evi-fpga-spi at 0 { + compatible = "altr,cyclone-ps-spi-fpga-mgr"; + spi-max-frequency = <20000000>; + reg = <0>; + nconfig-gpios = <&gpio4 9 GPIO_ACTIVE_LOW>; + nstat-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>; + confd-gpios = <&gpio4 12 GPIO_ACTIVE_LOW>; + }; -- 2.9.3