From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C9E18C32788 for ; Thu, 11 Oct 2018 07:26:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 856F12098A for ; Thu, 11 Oct 2018 07:26:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 856F12098A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727655AbeJKOwu (ORCPT ); Thu, 11 Oct 2018 10:52:50 -0400 Received: from mail-vs1-f66.google.com ([209.85.217.66]:46693 "EHLO mail-vs1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725995AbeJKOwu (ORCPT ); Thu, 11 Oct 2018 10:52:50 -0400 Received: by mail-vs1-f66.google.com with SMTP id i10so7551299vsm.13; Thu, 11 Oct 2018 00:26:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Av5hR24ThmTBwKmPzSxPVDugHipgNv4xoiZsvxVln+Y=; b=lfiRPmGNtuYjd1kl6UYbb1TMz2wHobGFy5Da4dkAbKWtmeRQS0zKdEEcbvsfAy8ZTU ckeVJXRSXHVoP8xC650jluU0tsd/xy3+U7g1Vh+Bi6WHf1o1H2ncI4xLp1HyK8suUboS Ijwgi7I4d3txb0YlBuUR1BGfEyCPbE0C0Dgp1+EFn5nkMA56mGLAAp+nE/tNX0R/TGSA /YB8/31/efeeLgPN3NOKcZ0PBzDOvenpCZdjaIMZT26B76/mI/6bGqZgePNHFy1i4GOl aoZzf+zdnDQUvxORX8hPFD2HQ32MEJfgFYeXL2lnLffM0Tob4M7q67VarfqTQt5uf4Bq F0BA== X-Gm-Message-State: ABuFfoib4+WaKkkTvAMply/VxSMC9v6dPzpTc58RSM2wxw0kGwmbibWe WDZEGWoWMoNJ9oCAMWrxcjnGhKmtOE16L58z7Xk= X-Google-Smtp-Source: ACcGV60Gxxu9kSYfDCkzbrPvzsLNYJzspAV6YD4tJ9m4Zebwv4sT/G/T+4fnvVv5fxTaTonjvdwkk5AHXVme3gKk5LI= X-Received: by 2002:a67:e015:: with SMTP id c21mr155747vsl.63.1539242810523; Thu, 11 Oct 2018 00:26:50 -0700 (PDT) MIME-Version: 1.0 References: <20181010170936.316862-1-lkundrak@v3.sk> <20181010170936.316862-10-lkundrak@v3.sk> In-Reply-To: <20181010170936.316862-10-lkundrak@v3.sk> From: Geert Uytterhoeven Date: Thu, 11 Oct 2018 09:26:39 +0200 Message-ID: Subject: Re: [PATCH 09/11] dt-bindings: spi/spi-pxa2xx: Add ready GPIO signal To: Lubomir Rintel Cc: Mark Brown , Geert Uytterhoeven , quozl@laptop.org, Rob Herring , Mark Rutland , Eric Miao , Haojian Zhuang , Daniel Mack , Robert Jarzmik , linux-spi , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux Kernel Mailing List , Linux ARM Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Lubomir, On Wed, Oct 10, 2018 at 7:10 PM Lubomir Rintel wrote: > This this is used to let the SPI master know that our FIFO is filled and > we're ready to service a transfer. Only useful in slave mode. > > A signal like this is used by an embedded controller on a OLPC XO 1.75 > machine, that happens to be a SPI master. > > Signed-off-by: Lubomir Rintel Thanks for your patch! > --- a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt > +++ b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt > @@ -12,6 +12,8 @@ Optional properties: > - cs-gpios: list of GPIO chip selects. See the SPI bus bindings, > Documentation/devicetree/bindings/spi/spi-bus.txt > - spi-slave: Empty property indicating the SPI controller is used in slave mode. > +- ready-gpio: GPIO used to signal a SPI master that the FIFO is filled ready-gpios Documentation/devicetree/bindings/gpio/gpio.txt: "GPIO properties named "[-]gpio" are valid and old bindings use it, but are only supported for compatibility reasons and should not be used for newer bindings since it has been deprecated." > + and we're ready to service a transfer. Only useful in slave mode. > > Child nodes represent devices on the SPI bus > See ../spi/spi-bus.txt Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds