From patchwork Tue Nov 6 16:05:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 10670751 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 774F314E2 for ; Tue, 6 Nov 2018 16:05:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6689E287EA for ; Tue, 6 Nov 2018 16:05:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5A4342A4A4; Tue, 6 Nov 2018 16:05:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E5B7429301 for ; Tue, 6 Nov 2018 16:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389030AbeKGBbo (ORCPT ); Tue, 6 Nov 2018 20:31:44 -0500 Received: from mail.bootlin.com ([62.4.15.54]:55088 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388959AbeKGBbo (ORCPT ); Tue, 6 Nov 2018 20:31:44 -0500 Received: by mail.bootlin.com (Postfix, from userid 110) id 38097206A1; Tue, 6 Nov 2018 17:05:49 +0100 (CET) Received: from localhost.localdomain (aaubervilliers-681-1-93-44.w90-88.abo.wanadoo.fr [90.88.34.44]) by mail.bootlin.com (Postfix) with ESMTPSA id C7E3920726; Tue, 6 Nov 2018 17:05:38 +0100 (CET) From: Boris Brezillon To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , linux-mtd@lists.infradead.org, Mark Brown , linux-spi@vger.kernel.org Cc: Vignesh R , Cyrille Pitchen , Tudor Ambarus , Yogesh Narayan Gaur , Frieder Schrempf , Miquel Raynal , Piotr Bugalski Subject: [PATCH v3 2/7] spi: spi-mem: Add SPI_MEM_NO_DATA to the spi_mem_data_dir enum Date: Tue, 6 Nov 2018 17:05:31 +0100 Message-Id: <20181106160536.13415-3-boris.brezillon@bootlin.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181106160536.13415-1-boris.brezillon@bootlin.com> References: <20181106160536.13415-1-boris.brezillon@bootlin.com> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When defining spi_mem_op templates we don't necessarily know the size that will be passed when the template is actually used, and basing the supports_op() check on op->data.nbytes to know whether there will be data transferred for a specific operation is this not possible. Add SPI_MEM_NO_DATA to the spi_mem_data_dir enum so that we can base our checks on op->data.dir instead of op->data.nbytes. Signed-off-by: Boris Brezillon Reviewed-by: Miquel Raynal --- Changes in v3: - Add Miquel's R-b Changes in v2: - New patch --- drivers/spi/spi-mem.c | 2 +- include/linux/spi/spi-mem.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 62a7b80801d2..967f581bca4f 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -142,7 +142,7 @@ static bool spi_mem_default_supports_op(struct spi_mem *mem, spi_check_buswidth_req(mem, op->dummy.buswidth, true)) return false; - if (op->data.nbytes && + if (op->data.dir != SPI_MEM_NO_DATA && spi_check_buswidth_req(mem, op->data.buswidth, op->data.dir == SPI_MEM_DATA_OUT)) return false; diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h index 867839cc69a7..250b6f5c47c2 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -57,10 +57,12 @@ /** * enum spi_mem_data_dir - describes the direction of a SPI memory data * transfer from the controller perspective + * @SPI_MEM_NO_DATA: no data transferred * @SPI_MEM_DATA_IN: data coming from the SPI memory * @SPI_MEM_DATA_OUT: data sent to the SPI memory */ enum spi_mem_data_dir { + SPI_MEM_NO_DATA, SPI_MEM_DATA_IN, SPI_MEM_DATA_OUT, };