From patchwork Mon Mar 27 04:34:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joy Chakraborty X-Patchwork-Id: 13188567 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 8D906C7619A for ; Mon, 27 Mar 2023 04:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232105AbjC0Eek (ORCPT ); Mon, 27 Mar 2023 00:34:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229653AbjC0Eej (ORCPT ); Mon, 27 Mar 2023 00:34:39 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F4DA4ECA for ; Sun, 26 Mar 2023 21:34:38 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-536cb268ab8so76326027b3.17 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=A8HrcGhp3dfg+CjG8IY+9PTVpQqS5+cto4hZs80sOWmr8KOrsGU4hrwzTpzsnza+jF TY22l2p0Fg6S0tVLjLOgSAMtIzxla3havHo/p88GyQXRYeQnxoHOwSG6FcOR1hjA9Ywl pOqnZ0m1kNpvIz7KD4f0bxyW3uiiTrRhnWESv1rZm3TzorWVF0ayTpqc4pBZPU+KV42W kCDtI0nvzZLSTnh8Ts4qLn8NH3iRDEiAk78TpAyOUApa9T05i1RnWBMe/we/fFz9QgVU HaW5DNVwwVCdVfS2ZtJ3bSz/tApMgy4Q1mFh37BqCCUfyQU1KLOGD2a3+3A7QwP5TSd7 wHpA== X-Gm-Message-State: AAQBX9dgFB68/nSgOGZF1UR7ScF/uw4MpNIWm6gMGRSaaVLPYYRwP35e XYFJqPwfCvpuik/ZzBs8Uf5hGfPA77+HaA== 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-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)