From patchwork Wed Sep 18 08:04:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gareth Williams X-Patchwork-Id: 11149785 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D9AA514DB for ; Wed, 18 Sep 2019 08:05:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C24A120882 for ; Wed, 18 Sep 2019 08:05:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729294AbfIRIFF (ORCPT ); Wed, 18 Sep 2019 04:05:05 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:10399 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726814AbfIRIFD (ORCPT ); Wed, 18 Sep 2019 04:05:03 -0400 X-IronPort-AV: E=Sophos;i="5.64,519,1559487600"; d="scan'208";a="26658094" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 18 Sep 2019 17:05:01 +0900 Received: from renesas-VirtualBox.ree.adwin.renesas.com (unknown [10.226.37.56]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 05B2F41C9BD7; Wed, 18 Sep 2019 17:04:58 +0900 (JST) From: Gareth Williams To: Mark Brown , Rob Herring , Mark Rutland Cc: Phil Edworthy , Geert Uytterhoeven , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Gareth Williams Subject: [PATCH v2 1/4] dt: spi: Add Renesas RZ/N1 binding documentation Date: Wed, 18 Sep 2019 09:04:33 +0100 Message-Id: <1568793876-9009-2-git-send-email-gareth.williams.jx@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568793876-9009-1-git-send-email-gareth.williams.jx@renesas.com> References: <1568793876-9009-1-git-send-email-gareth.williams.jx@renesas.com> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Phil Edworthy The Renesas RZ/N1 SPI Controller is based on the Synopsys DW SSI, but has additional registers for software CS control and DMA. This patch does not address the changes required for DMA support, it simply adds the compatible string. The CS functionality is not very useful and also not needed as Linux can use gpios for the CS signals. Add a compatible string to handle any unforeseen issues that may arise, and pave the way for DMA support. Signed-off-by: Gareth Williams Signed-off-by: Phil Edworthy Reviewed-by: Rob Herring --- Note: All the other manufacturers detail their compatible strings in snps,dw-apb-ssi.txt. I think it makes sense for rzn1 to be in it's own file due to the changes made to the peripheral for DMA support. v2: - No changes. --- Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt diff --git a/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt b/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt new file mode 100644 index 0000000..fb1a672 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/renesas,rzn1-spi.txt @@ -0,0 +1,11 @@ +Renesas RZ/N1 SPI Controller + +This controller is based on the Synopsys DW Synchronous Serial Interface and +inherits all properties defined in snps,dw-apb-ssi.txt except for the +compatible property. + +Required properties: +- compatible : The device specific string followed by the generic RZ/N1 string. + Therefore it must be one of: + "renesas,r9a06g032-spi", "renesas,rzn1-spi" + "renesas,r9a06g033-spi", "renesas,rzn1-spi"