From patchwork Mon Sep 17 12:08:07 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 10602619 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B589A157B for ; Mon, 17 Sep 2018 12:08:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9F6D5299DB for ; Mon, 17 Sep 2018 12:08:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9355C299E6; Mon, 17 Sep 2018 12:08:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 557AC299E4 for ; Mon, 17 Sep 2018 12:08:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728190AbeIQRfe (ORCPT ); Mon, 17 Sep 2018 13:35:34 -0400 Received: from shell.v3.sk ([90.176.6.54]:47268 "EHLO shell.v3.sk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728241AbeIQRfe (ORCPT ); Mon, 17 Sep 2018 13:35:34 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 7A6EBAEEAD; Mon, 17 Sep 2018 14:08:30 +0200 (CEST) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id kEkaFdPxynt7; Mon, 17 Sep 2018 14:08:23 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id EE659AF423; Mon, 17 Sep 2018 14:08:22 +0200 (CEST) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id H8RCqtz_0_YU; Mon, 17 Sep 2018 14:08:20 +0200 (CEST) Received: from belphegor.brq.redhat.com (nat-pool-brq-t.redhat.com [213.175.37.10]) by zimbra.v3.sk (Postfix) with ESMTPSA id 6D14FAF017; Mon, 17 Sep 2018 14:08:20 +0200 (CEST) From: Lubomir Rintel To: Geert Uytterhoeven Cc: linux-spi@vger.kernel.org, Lubomir Rintel Subject: [PATCH RFC 4/5] dt-bindings: spi/spi-pxa2xx: Add ready GPIO signal Date: Mon, 17 Sep 2018 14:08:07 +0200 Message-Id: <20180917120808.20224-5-lkundrak@v3.sk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180917120808.20224-1-lkundrak@v3.sk> References: <20180917120808.20224-1-lkundrak@v3.sk> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- Documentation/devicetree/bindings/spi/spi-pxa2xx.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt index 89b2832283e3..681a82b40e6f 100644 --- 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 + 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