From patchwork Fri Dec 9 16:49:26 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 704628 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3tZzkP64KVz9vFl for ; Sat, 10 Dec 2016 04:29:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934117AbcLIR3c (ORCPT ); Fri, 9 Dec 2016 12:29:32 -0500 Received: from 5.mo5.mail-out.ovh.net ([87.98.173.103]:45105 "EHLO 5.mo5.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933360AbcLIR3c (ORCPT ); Fri, 9 Dec 2016 12:29:32 -0500 Received: from player760.ha.ovh.net (b9.ovh.net [213.186.33.59]) by mo5.mail-out.ovh.net (Postfix) with ESMTP id 0CFCC53F35 for ; Fri, 9 Dec 2016 17:50:43 +0100 (CET) Received: from hermes.kaod.org.com (LFbn-1-2234-107.w90-76.abo.wanadoo.fr [90.76.55.107]) (Authenticated sender: clg@kaod.org) by player760.ha.ovh.net (Postfix) with ESMTPSA id 865899B; Fri, 9 Dec 2016 17:50:30 +0100 (CET) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: linux-mtd@lists.infradead.org Cc: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Cyrille Pitchen , devicetree@vger.kernel.org, Rob Herring , Mark Rutland , Joel Stanley , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PATCH v3 4/5] mtd: spi-nor: bindings for the Aspeed memory controllers Date: Fri, 9 Dec 2016 17:49:26 +0100 Message-Id: <1481302167-28044-5-git-send-email-clg@kaod.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1481302167-28044-1-git-send-email-clg@kaod.org> References: <1481302167-28044-1-git-send-email-clg@kaod.org> MIME-Version: 1.0 X-Ovh-Tracer-Id: 16204514411812129715 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeelfedrheeigdegudcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Signed-off-by: Cédric Le Goater --- .../devicetree/bindings/mtd/aspeed-smc.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/aspeed-smc.txt diff --git a/Documentation/devicetree/bindings/mtd/aspeed-smc.txt b/Documentation/devicetree/bindings/mtd/aspeed-smc.txt new file mode 100644 index 000000000000..e2c88cea38f6 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/aspeed-smc.txt @@ -0,0 +1,51 @@ +* Aspeed Firmware Memory controller +* Aspeed SPI Flash Memory Controller + +The Firmware Memory Controller in the Aspeed AST2500 SoC supports +three chip selects, two of which are always of SPI type and the third +can be SPI or NOR type flash, but the driver only supports SPI. + +The two SPI flash memory controllers in the AST2500 each support two +chip selects. + +Required properties: + - compatible : Should be one of + "aspeed,ast2400-fmc" for the AST2400 Firmware Memory Controller + "aspeed,ast2400-spi" for the AST2400 SPI Flash memory Controller + "aspeed,ast2500-fmc" for the AST2500 Firmware Memory Controller + "aspeed,ast2500-spi" for the AST2500 SPI flash memory controllers + + - reg : the first contains the control register location and length, + the second contains the memory window mapping address and length + - #address-cells : must be 1 corresponding to chip select child binding + - #size-cells : must be 0 corresponding to chip select child binding + +Optional properties: + - interrupts : Should contain the interrupt for the dma device if an + FMC + +The child nodes are the SPI flash modules which must have a compatible +property as specified in bindings/mtd/jedec,spi-nor.txt + +Optionally, the child node can contain properties for SPI mode (may be +ignored): + - spi-max-frequency - max frequency of spi bus + + +Example: +fmc: fmc@1e620000 { + compatible = "aspeed,ast2500-fmc"; + reg = < 0x1e620000 0x94 + 0x20000000 0x02000000 >; + #address-cells = <1>; + #size-cells = <0>; + interrupts = <19>; + flash@0 { + reg = < 0 >; + compatible = "jedec,spi-nor"; + /* spi-max-frequency = <>; */ + /* m25p,fast-read; */ + #address-cells = <1>; + #size-cells = <1>; + }; +};