From patchwork Tue Jun 23 18:30:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 11621443 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 62B0892A for ; Tue, 23 Jun 2020 18:32:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B7CC2080C for ; Tue, 23 Jun 2020 18:32:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="o+1vOeEE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733075AbgFWSbG (ORCPT ); Tue, 23 Jun 2020 14:31:06 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:47916 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732988AbgFWSbG (ORCPT ); Tue, 23 Jun 2020 14:31:06 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 05NIUg1g046667; Tue, 23 Jun 2020 13:30:42 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1592937042; bh=iMtUHt0rAjRLMe+mvdnL0nxuMBYvHggaoNeE2bSkaA4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=o+1vOeEEHTaja6oPk8R+/KJpjOFeWOkYn3WgVtG1znQRaPxTexDhiprIqgiX5kn8b BBGEKDzi6sA5fUHTPmE+ZpSkkNZxEO22NEV8JrcICnU6+jp5g5NpmCyytatEhTbC3F hzuq8Rn3qZzg915ATI2JGE02VwOgq/aoynDpnHZg= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 05NIUgk6038330 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 23 Jun 2020 13:30:42 -0500 Received: from DFLE112.ent.ti.com (10.64.6.33) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Tue, 23 Jun 2020 13:30:41 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Tue, 23 Jun 2020 13:30:41 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 05NIUVJF000942; Tue, 23 Jun 2020 13:30:37 -0500 From: Pratyush Yadav To: Tudor Ambarus , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mark Brown , Nicolas Ferre , Alexandre Belloni , Ludovic Desroches , Matthias Brugger , Michal Simek , , , , , CC: Pratyush Yadav , Sekhar Nori , Boris Brezillon Subject: [PATCH v10 01/17] spi: spi-mem: allow specifying whether an op is DTR or not Date: Wed, 24 Jun 2020 00:00:14 +0530 Message-ID: <20200623183030.26591-2-p.yadav@ti.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200623183030.26591-1-p.yadav@ti.com> References: <20200623183030.26591-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Each phase is given a separate 'dtr' field so mixed protocols like 4S-4D-4D can be supported. Signed-off-by: Pratyush Yadav Reviewed-by: Tudor Ambarus --- drivers/spi/spi-mem.c | 3 +++ include/linux/spi/spi-mem.h | 8 ++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 9a86cc27fcc0..93e255287ab9 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -156,6 +156,9 @@ bool spi_mem_default_supports_op(struct spi_mem *mem, op->data.dir == SPI_MEM_DATA_OUT)) return false; + if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) + return false; + return true; } EXPORT_SYMBOL_GPL(spi_mem_default_supports_op); diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h index af9ff2f0f1b2..e3dcb956bf61 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -71,9 +71,11 @@ enum spi_mem_data_dir { * struct spi_mem_op - describes a SPI memory operation * @cmd.buswidth: number of IO lines used to transmit the command * @cmd.opcode: operation opcode + * @cmd.dtr: whether the command opcode should be sent in DTR mode or not * @addr.nbytes: number of address bytes to send. Can be zero if the operation * does not need to send an address * @addr.buswidth: number of IO lines used to transmit the address cycles + * @addr.dtr: whether the address should be sent in DTR mode or not * @addr.val: address value. This value is always sent MSB first on the bus. * Note that only @addr.nbytes are taken into account in this * address value, so users should make sure the value fits in the @@ -81,7 +83,9 @@ enum spi_mem_data_dir { * @dummy.nbytes: number of dummy bytes to send after an opcode or address. Can * be zero if the operation does not require dummy bytes * @dummy.buswidth: number of IO lanes used to transmit the dummy bytes + * @dummy.dtr: whether the dummy bytes should be sent in DTR mode or not * @data.buswidth: number of IO lanes used to send/receive the data + * @data.dtr: whether the data should be sent in DTR mode or not * @data.dir: direction of the transfer * @data.nbytes: number of data bytes to send/receive. Can be zero if the * operation does not involve transferring data @@ -91,22 +95,26 @@ enum spi_mem_data_dir { struct spi_mem_op { struct { u8 buswidth; + u8 dtr : 1; u8 opcode; } cmd; struct { u8 nbytes; u8 buswidth; + u8 dtr : 1; u64 val; } addr; struct { u8 nbytes; u8 buswidth; + u8 dtr : 1; } dummy; struct { u8 buswidth; + u8 dtr : 1; enum spi_mem_data_dir dir; unsigned int nbytes; union {