From patchwork Thu Mar 30 06:34:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joy Chakraborty X-Patchwork-Id: 13193458 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2D11C74A5B for ; Thu, 30 Mar 2023 06:35:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229732AbjC3GfI (ORCPT ); Thu, 30 Mar 2023 02:35:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229931AbjC3GfG (ORCPT ); Thu, 30 Mar 2023 02:35:06 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 605D965AC for ; Wed, 29 Mar 2023 23:35:05 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-54196bfcd5fso175667317b3.4 for ; Wed, 29 Mar 2023 23:35:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1680158104; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=H4XJD2H+uA3ZKVf/qBdJwtkZFmjUhMkPOEUkmWMqpBE=; b=Fn5nnpbCOqBGSCpvePohnp/LYXOjlaWyo7dClBiDjwYsGEcWQ/l24kYPZjE1EA8ngm RkYCCh4kL4ZEMCizgZQ/voC6sL0VmFhq2HhEl6N+gWOBN/Ok/DgHzco/sRSHyoNA+VcX 9C6aCIfP/r8LNxtZzhZuhu5dy8hME1X3ZAsGgThTduXqQlSnbtoswTCT5E7d55XMgndU l5MG8vSAYejEWCYqFcCiVHTc0LQgV0wQmj5Bn0WBmzciR9Og9Qowznh3hxidgUutMU+K LHC85PCMzqdTCz3ZYtvV9NYVT6GMkk542OpQqvQtz37DwEnSgoaF3uB/t5siQpw8/T+/ G68A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680158104; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=H4XJD2H+uA3ZKVf/qBdJwtkZFmjUhMkPOEUkmWMqpBE=; b=4N5pKYd/EM15llWGeutKLIuSBeAIE3JB5cknfTpHgQV9QXo84K9gTqm6awAvg1aye6 fENS61O6AHAI/4jjlRBNxYa992XUyBhGlJyk4OlKXSp3gtYFXSRenFcKQwb84U3mjH9I VBDKLGemtLl1pHuQkXty+3+RjRr3kLTvALRgJHiF8zfouR9GIvoelJ6C3oXIln3vQrEJ 8nUF8WMJjRL+pGPT7W/M/xrQy+ZB10b45Qh9sZQsP5TsNEA9gQ1iXEMYknqc2pi+jT9J r22wgJKJyJx3C8KqMqEOy9g3MsUEsRxYXdR3DKCJu5Wnzby/To7Zn+XAHo48b1b3H1Ow SQWg== X-Gm-Message-State: AAQBX9eXjJVI1vQv39xcxnzQvtEXL7Zo9Aj0aYXKUMQr8bZqLEsbin8D 4UizgtZEfptnXza4Mco0FOzZmsHPFpHOIQ== X-Google-Smtp-Source: AKy350bRT0Ms2Z3jxE4kPUj+uZn7qs77IKyFYsz+wI65LRZonct3i2E36PW1+Mfv5NciFXEAZDYfOOGdC11ZOQ== X-Received: from joychakr.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:6ea]) (user=joychakr job=sendgmr) by 2002:a81:4410:0:b0:545:a7d8:f278 with SMTP id r16-20020a814410000000b00545a7d8f278mr10413624ywa.5.1680158104432; Wed, 29 Mar 2023 23:35:04 -0700 (PDT) Date: Thu, 30 Mar 2023 06:34:49 +0000 In-Reply-To: <20230330063450.2289058-1-joychakr@google.com> Mime-Version: 1.0 References: <20230330063450.2289058-1-joychakr@google.com> X-Mailer: git-send-email 2.40.0.423.gd6c402a77b-goog Message-ID: <20230330063450.2289058-2-joychakr@google.com> Subject: [PATCH v5 1/2] spi: dw: Add 32 bpw support to DW DMA Controller From: Joy Chakraborty To: Serge Semin , Mark Brown Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, manugautam@google.com, rohitner@google.com, Joy Chakraborty Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add Support for AxSize = 4 bytes configuration from dw dma driver if n_bytes i.e. number of bytes per write to fifo is 3 or 4. Number of bytes written to fifo per write is depended on the bits/word configuration being used which the DW core driver translates to n_bytes. Signed-off-by: Joy Chakraborty --- drivers/spi/spi-dw-dma.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c index ababb910b391..b3a88bb75907 100644 --- a/drivers/spi/spi-dw-dma.c +++ b/drivers/spi/spi-dw-dma.c @@ -208,12 +208,17 @@ static bool dw_spi_can_dma(struct spi_controller *master, static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes) { - if (n_bytes == 1) + switch (n_bytes) { + case 1: return DMA_SLAVE_BUSWIDTH_1_BYTE; - else if (n_bytes == 2) + case 2: return DMA_SLAVE_BUSWIDTH_2_BYTES; - - return DMA_SLAVE_BUSWIDTH_UNDEFINED; + case 3: + case 4: + return DMA_SLAVE_BUSWIDTH_4_BYTES; + default: + return DMA_SLAVE_BUSWIDTH_UNDEFINED; + } } static int dw_spi_dma_wait(struct dw_spi *dws, unsigned int len, u32 speed)