From patchwork Thu Dec 3 16:57:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Kiselev X-Patchwork-Id: 11949509 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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 0C7C2C433FE for ; Thu, 3 Dec 2020 16:58:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A07EC207AE for ; Thu, 3 Dec 2020 16:58:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726031AbgLCQ6e (ORCPT ); Thu, 3 Dec 2020 11:58:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726026AbgLCQ6e (ORCPT ); Thu, 3 Dec 2020 11:58:34 -0500 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E937C061A4F; Thu, 3 Dec 2020 08:57:48 -0800 (PST) Received: by mail-pf1-x42e.google.com with SMTP id q10so1695007pfn.0; Thu, 03 Dec 2020 08:57:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=4RN4lDKcBCUJRe+wn8srvtMYKGE3DNBe+LKKp0gOoAk=; b=Gz81ipfafeXXxDWwoD7NhXxSdejww5z0emFjuapn3aVcTUxw37OKDZNqULpzdD4dj7 q765lFPvNtmR9Omi4KGwZtJaD5KFYD2LrRMpDzdquFg92DhrxOqRcPgy9Dsdu1UrogBL frULSkTqRr2TmDWUV5FRAyRh4gmniAQ1o87y89moD3159GNcbT03JWVSs4cg8TT3B/18 UdlOeGA9YKp1JPUe6/WQhZRtKsbK4FS880B9PkRP0xRhfPLo64RqQ2UUyJW95EkuqMJq mb5JQ1L9NhVqVjdo338dcmDxyl11FYRPCj/n5ipSlH6Xvi4M1pPqX3lu8zhpqohJMWGx jQVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=4RN4lDKcBCUJRe+wn8srvtMYKGE3DNBe+LKKp0gOoAk=; b=LfScWR1D/BXik/cN/0Qfq4fqZ74tQTHPlWdU6MNY9so27n634FIZWlcLtmQbMqXARP W386WbbFcFnARF++iAp1JuNpRLUqkR73hQckKCKuinfriiW8Ti2GI/2eNdsR/kfW581D PX/CohJRMnoNb66hrVQorIE/WXIBsOML6D6NBD+Nm63KvKVEWDdQqHsfnTABf++uN/6l gC4R1XcuEnPZNfzE6XjpkX8MG0O236Ys2mRBFdIcGjGwtL19r/qx7tNrsDiZI9BIBB37 aIK9xcTIlzHoPBWZ4NowBqVZyA7oOeuwntfHmyz86hmnHV9g0zWPw2PJsGoj/aQIaoIg +Pag== X-Gm-Message-State: AOAM5307XlUusNd6px5nkkZCZJnLoCkuW7dI+A0HkofPv09xGf77z6dT yF1mEYAc1LkEAH+tssDK09ki6pnF8s4TPCDaFbk= X-Google-Smtp-Source: ABdhPJxYBKiOnIUXc4yQq5LsA65+zeEz4hHqZwFMki3dZm6SenHWuj43KDbJsAkO3zmjp+VLnL2xyEfLZo7ZCAbtFJA= X-Received: by 2002:a63:a0b:: with SMTP id 11mr3807266pgk.21.1607014667655; Thu, 03 Dec 2020 08:57:47 -0800 (PST) MIME-Version: 1.0 From: =?utf-8?b?0JzQsNC60YHQuNC8INCa0LjRgdC10LvRkdCy?= Date: Thu, 3 Dec 2020 19:57:36 +0300 Message-ID: Subject: To: Vladimir Oltean , Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?b?0JzQsNC6?= =?utf-8?b?0YHQuNC8INCa0LjRgdC10LvRkdCy?= , Maxim Kochetkov Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From 772007b92eda50186c2e420b5bd895d4e4006ae8 Mon Sep 17 00:00:00 2001 From: Maxim Kiselev Date: Thu, 3 Dec 2020 18:56:12 +0300 Subject: [PATCH] spi: spi-fsl-dspi: Add GPIO chip select support This patch allows use of GPIO for the chip select. Because dSPI controller can't send transactions without hardware chip selects, so first unused native CS will be set in SPI_PUSHR_CMD_PCS Signed-off-by: Maxim Kiselev --- drivers/spi/spi-fsl-dspi.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) /* Leave PCS activated after last transfer when @@ -1240,6 +1245,7 @@ static int dspi_probe(struct platform_device *pdev) dspi->pdev = pdev; dspi->ctlr = ctlr; + ctlr->use_gpio_descriptors = true; ctlr->setup = dspi_setup; ctlr->transfer_one_message = dspi_transfer_one_message; ctlr->dev.of_node = pdev->dev.of_node; diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 028736687488..d5fba34de740 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -913,9 +913,14 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr, dspi->cur_transfer = transfer; dspi->cur_msg = message; dspi->cur_chip = spi_get_ctldata(spi); + + if (spi->cs_gpiod) + gpiod_set_value(spi->cs_gpiod, 1); + /* Prepare command word for CMD FIFO */ dspi->tx_cmd = SPI_PUSHR_CMD_CTAS(0) | - SPI_PUSHR_CMD_PCS(spi->chip_select); + SPI_PUSHR_CMD_PCS(spi->cs_gpiod ? + ctlr->unused_native_cs : spi->chip_select); if (list_is_last(&dspi->cur_transfer->transfer_list, &dspi->cur_msg->transfers)) {