From nobody Sun Feb 8 21:47:15 2026 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 41251C76195 for ; Mon, 27 Mar 2023 04:34:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232187AbjC0Eem (ORCPT ); Mon, 27 Mar 2023 00:34:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232186AbjC0Eej (ORCPT ); Mon, 27 Mar 2023 00:34:39 -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 3F5CC4ECB for ; Sun, 26 Mar 2023 21:34:38 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-545e529206eso18391137b3.9 for ; Sun, 26 Mar 2023 21:34:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1679891677; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=sPVKlHs8rdxB8UK5BU2ADWdalnh8Q9IQfmw/DaMpLMc=; b=Hn0rFABF3w227/orfbWGzUmPI0QrILbuKF4wmvZ1wwW31KwSk1UudgpTAnvdn8NDVw Bg3SAYFLkqHAyYO6DXbcqvBMQyaKa/gBDRp2MgrS+AVSE0w9/bXEBv299glKl0mh4f+A s1oKfbKa8KBvExwwWcrx/Yl8TEl8FKg4VekK6sSsDOFJlFvS+9dwRTFomCl8Dis17fp8 azxWvEk0dluGeI4guR8j7AwrZunEBHrkTATiAIWn1Wt6qHlM/wxddCsCjfzHjpD6Rrc+ c83vKqcUJz6ij//ltyzYO/+/JJRcCz9fBKpg2BADknUuAugmCTMFjvoVPdpwW/wk5U5o P6dg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679891677; 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=sPVKlHs8rdxB8UK5BU2ADWdalnh8Q9IQfmw/DaMpLMc=; b=V+hJRRCee5e9ub+5OYb0hwcPPILZcwlO5ioI4sus32CLjyLbnkxsFvf402WLpfVDuV m8/p+HtL1oUoN5nkIhAXaT982DYOciEAvalRrx+sSUM5yRsgrCzX1/ZOpNtL7dXFD1nl Y0YvMu0vLQ9acNZgTuWKcN1e98d9m4rEoPW2ZASKQxnh83Z5Rpa1poZrtENlVGY7VQAX ucFQsGA81u0qzRIxsvWVMnuWpTtLJQdQUcmazDoaL45Ipwy0fOdXWWkPWVFA17YgNDd6 8WQyUDRKcHLTkvlMUSUjXzJrBIZA6UPMLarCqDc1l5OXsDxqDVOwTUvNFAyIJgxT9Bwq 3iBA== X-Gm-Message-State: AAQBX9dGv9zE4tSQuodnK951UI2uZmEJ9H7OOZ6TL5ojmIc/7yB7F/jP QGMyi1eDWpdSCnsGnj/xXrx2fBwRwptJNw== X-Google-Smtp-Source: AKy350ZgmAqvY+rvLG19P9MAICkhUZ57zTI/O1tDGw1hxJxsyZslVjt8Pv8bjnoIxbeCQYY0wRo2IE8XeB5MCw== X-Received: from joychakr.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:6ea]) (user=joychakr job=sendgmr) by 2002:a05:6902:168d:b0:b26:47f3:6cb with SMTP id bx13-20020a056902168d00b00b2647f306cbmr4767786ybb.4.1679891677537; Sun, 26 Mar 2023 21:34:37 -0700 (PDT) Date: Mon, 27 Mar 2023 04:34:04 +0000 In-Reply-To: <20230327043405.881645-1-joychakr@google.com> Mime-Version: 1.0 References: <20230327043405.881645-1-joychakr@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog Message-ID: <20230327043405.881645-2-joychakr@google.com> Subject: [PATCH v4 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-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add Support for AxSize =3D 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 *mas= ter, =20 static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes) { - if (n_bytes =3D=3D 1) + switch (n_bytes) { + case 1: return DMA_SLAVE_BUSWIDTH_1_BYTE; - else if (n_bytes =3D=3D 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; + } } =20 static int dw_spi_dma_wait(struct dw_spi *dws, unsigned int len, u32 speed) --=20 2.40.0.348.gf938b09366-goog