From patchwork Thu May 20 21:16:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Oltean X-Patchwork-Id: 445073 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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT 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 F0C18C433B4 for ; Thu, 20 May 2021 21:17:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C921761355 for ; Thu, 20 May 2021 21:17:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229890AbhETVS0 (ORCPT ); Thu, 20 May 2021 17:18:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229808AbhETVS0 (ORCPT ); Thu, 20 May 2021 17:18:26 -0400 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7CBDBC061574; Thu, 20 May 2021 14:17:04 -0700 (PDT) Received: by mail-ej1-x62c.google.com with SMTP id k14so23982129eji.2; Thu, 20 May 2021 14:17:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=P1hn6+pud/VwdmBZ5hvHt7UVqtcVYsS0pOmed7474aI=; b=h1niVe0GHP5qCgymZCGrDQ87b9Hk6RpBM3TJneUXLyAp9wx5lYGgEoh6+3awlKcx4E YCejFNRZLxv5Ast8GBiFPR0o0kWsZlEzGsGt20hLZRnrRHbarU612s5EAEAgUncAYdzU i/Zjc1fw8+nDNj4fKdq97K6UlCrn6KA5VS18rP3rG7B26qdPdc9h0wEMmkYva8ytOsx8 8hASi2bzjExeBBuR89a1adDY+vseWyO+99me641ch+5IyrKOn4iLo6TZ/yS+/M5fqswq 9oKYJvxs57j7GRWpjUOLoaO4lX5dSknpnQlXhs4+/8mYcPxJrBth7myQs3k9u1giPRoL FRVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=P1hn6+pud/VwdmBZ5hvHt7UVqtcVYsS0pOmed7474aI=; b=P8cpfTHyjSgHN163tvhpbN/j5qgTQScKNXzSUhn/WsG/K0HM1NCWtIDRmQ/NGw4/wI gkSM1GJUINXjKbLYS/3l6ws0iiG95sKB/Z1v5IR8+PLEFyDZiDxp7fpx8MrWEoGTy0Nl rmmlTBGEtHaugTCaKax4bsHBUKRuPp4Z1d/ac+U69Kj6azrsS/WPqRHfPXfnDVUmnRLs GTnMcxHpBrSFGxn4HYgLEaY1YhilA2aVwgIy3pwtWQBsidWO0gFYkATDNx0eB7WyWazn 8uo7p8VyFZkL91PnKwNZqVn9EgABwaoJUZTFJy+AQ2fOyMgxrP+/2thOCW39ANesslsv fKcQ== X-Gm-Message-State: AOAM532xcQnLq25P/hWPfElK4+58HWSsDr3+Rg4VKvITq4rkweCHFUR/ zTi3EK2HUf97OmeH504homg= X-Google-Smtp-Source: ABdhPJz1Gi5WscCanz1btdOQT2cQrGNQ1RckUXBcgZyVu/rdgVUZaB4gT5CNgPsFpPnrpwtV3I8Kdw== X-Received: by 2002:a17:906:1e44:: with SMTP id i4mr6476561ejj.61.1621545423104; Thu, 20 May 2021 14:17:03 -0700 (PDT) Received: from localhost.localdomain ([188.26.52.84]) by smtp.gmail.com with ESMTPSA id w10sm2084212ejq.48.2021.05.20.14.17.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 May 2021 14:17:02 -0700 (PDT) From: Vladimir Oltean To: Jakub Kicinski , "David S. Miller" , netdev@vger.kernel.org Cc: Florian Fainelli , Andrew Lunn , Vivien Didelot , Mark Brown , linux-spi@vger.kernel.org, Guenter Roeck , Vladimir Oltean Subject: [PATCH v3 net-next 0/2] Adapt the sja1105 DSA driver to the SPI controller's transfer limits Date: Fri, 21 May 2021 00:16:55 +0300 Message-Id: <20210520211657.3451036-1-olteanv@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Vladimir Oltean This series changes the SPI transfer procedure in sja1105 to take into consideration the buffer size limitations that the SPI controller driver might have. Changes in v3: - Avoid a signed vs unsigned issue in the interpretation of SIZE_MAX. - Move the max transfer length checks to probe time, since nothing will change dynamically. Changes in v2: Remove the driver's use of cs_change and send multiple, smaller SPI messages instead of a single large one. Vladimir Oltean (2): net: dsa: sja1105: send multiple spi_messages instead of using cs_change net: dsa: sja1105: adapt to a SPI controller with a limited max transfer size drivers/net/dsa/sja1105/sja1105.h | 1 + drivers/net/dsa/sja1105/sja1105_main.c | 28 ++++++++ drivers/net/dsa/sja1105/sja1105_spi.c | 66 +++++-------------- .../net/dsa/sja1105/sja1105_static_config.h | 2 + 4 files changed, 49 insertions(+), 48 deletions(-)