From patchwork Tue Feb 5 05:59:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vignesh Raghavendra X-Patchwork-Id: 1036438 X-Patchwork-Delegate: jagannadh.teki@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.b="FlK5qJq3"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 43tv9g6wWQz9sMx for ; Tue, 5 Feb 2019 17:02:15 +1100 (AEDT) Received: by lists.denx.de (Postfix, from userid 105) id 90E29C21F51; Tue, 5 Feb 2019 06:00:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=RCVD_IN_DNSWL_BLOCKED, T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 68F9AC21F0C; Tue, 5 Feb 2019 05:59:21 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 11240C21F4A; Tue, 5 Feb 2019 05:59:14 +0000 (UTC) Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) by lists.denx.de (Postfix) with ESMTPS id 5D3A7C21E76 for ; Tue, 5 Feb 2019 05:59:09 +0000 (UTC) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id x155x0Qk029615; Mon, 4 Feb 2019 23:59:00 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1549346340; bh=sVxraT9fy82kwfoawfC9uPjU5cZ1vIbU6snGcC3glEQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=FlK5qJq3KoQW+htNsA2c3Eg/RNKr3Ge1Esija8ox/G2ieMkt5UISv2yFC3FhbSEtJ zUxL3xNyh0I4MY+niDvrDCKetGQF6NAVONo6b1o0MkVjtDkP2VtdQXkptKeGeZQlZ3 SSx4RbUhP4uugCN8fVcArnOjrQr4Pd+du5FWzfqk= Received: from DLEE111.ent.ti.com (dlee111.ent.ti.com [157.170.170.22]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x155x0mT036197 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 4 Feb 2019 23:59:00 -0600 Received: from DLEE108.ent.ti.com (157.170.170.38) by DLEE111.ent.ti.com (157.170.170.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Mon, 4 Feb 2019 23:58:59 -0600 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Mon, 4 Feb 2019 23:58:59 -0600 Received: from a0132425.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id x155wVW7006226; Mon, 4 Feb 2019 23:58:54 -0600 From: Vignesh R To: Jagan Teki Date: Tue, 5 Feb 2019 11:29:13 +0530 Message-ID: <20190205055929.24168-5-vigneshr@ti.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190205055929.24168-1-vigneshr@ti.com> References: <20190205055929.24168-1-vigneshr@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Cc: Marek Vasut , Tom Rini , Stefan Roese , Nobuhiro Iwamatsu , Boris Brezillon , Michal Simek , u-boot@lists.denx.de, Rajat Srivastava , Miquel Raynal Subject: [U-Boot] [PATCH v4 04/20] spi: spi-mem: Extend spi_mem_adjust_op_size() to honor max xfer size X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" Extend spi_mem_adjust_op_size() to take spi->max_write_size and spi->max_read_size into account. Signed-off-by: Vignesh R Tested-by: Simon Goldschmidt Tested-by: Stefan Roese Tested-by: Horatiu Vultur Reviewed-by: Jagan Teki Tested-by: Jagan Teki #zynq-microzed --- drivers/spi/spi-mem.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 1da20b8de5c4..334af682dc65 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -412,6 +412,25 @@ int spi_mem_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op) if (ops->mem_ops && ops->mem_ops->adjust_op_size) return ops->mem_ops->adjust_op_size(slave, op); + if (!ops->mem_ops || !ops->mem_ops->exec_op) { + unsigned int len; + + len = sizeof(op->cmd.opcode) + op->addr.nbytes + + op->dummy.nbytes; + if (slave->max_write_size && len > slave->max_write_size) + return -EINVAL; + + if (op->data.dir == SPI_MEM_DATA_IN && slave->max_read_size) + op->data.nbytes = min(op->data.nbytes, + slave->max_read_size); + else if (slave->max_write_size) + op->data.nbytes = min(op->data.nbytes, + slave->max_write_size - len); + + if (!op->data.nbytes) + return -EINVAL; + } + return 0; } EXPORT_SYMBOL_GPL(spi_mem_adjust_op_size);