From patchwork Tue Dec 14 11:41:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12675841 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 8589CC433EF for ; Tue, 14 Dec 2021 11:41:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233641AbhLNLl6 (ORCPT ); Tue, 14 Dec 2021 06:41:58 -0500 Received: from relay1-d.mail.gandi.net ([217.70.183.193]:53345 "EHLO relay1-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233645AbhLNLl5 (ORCPT ); Tue, 14 Dec 2021 06:41:57 -0500 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay1-d.mail.gandi.net (Postfix) with ESMTPSA id 3F6C0240010; Tue, 14 Dec 2021 11:41:55 +0000 (UTC) From: Miquel Raynal To: Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Pratyush Yadav , Michael Walle , , Mark Brown , Cc: Julien Su , Jaime Liao , Thomas Petazzoni , Boris Brezillon , Xiangsheng Hou , Miquel Raynal Subject: [PATCH v5 06/13] spi: spi-mem: Add an ecc_en parameter to the spi_mem_op structure Date: Tue, 14 Dec 2021 12:41:33 +0100 Message-Id: <20211214114140.54629-7-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211214114140.54629-1-miquel.raynal@bootlin.com> References: <20211214114140.54629-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Soon the SPI-NAND core will need a way to request a SPI controller to enable ECC support for a given operation. This is because of the pipelined integration of certain ECC engines, which are directly managed by the SPI controller itself. Introduce a spi_mem_op additional field for this purpose: ecc_en. So far this field is left unset and checked to be false by all the SPI controller drivers in their ->supports_op() hook, as they all call spi_mem_default/dtr_supports_op(). Signed-off-by: Miquel Raynal --- drivers/spi/spi-mem.c | 5 +++++ include/linux/spi/spi-mem.h | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index df2ec2c8ce31..30a0921d5496 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -176,6 +176,11 @@ bool spi_mem_generic_supports_op(struct spi_mem *mem, return false; } + if (!caps->ecc) { + if (op->ecc_en) + return false; + } + return spi_mem_check_buswidth(mem, op); } EXPORT_SYMBOL_GPL(spi_mem_generic_supports_op); diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h index a17dd5035530..a667dfc8f327 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -94,6 +94,7 @@ enum spi_mem_data_dir { * operation does not involve transferring data * @data.buf.in: input buffer (must be DMA-able) * @data.buf.out: output buffer (must be DMA-able) + * @ecc_en: error correction is required */ struct spi_mem_op { struct { @@ -126,6 +127,8 @@ struct spi_mem_op { const void *out; } buf; } data; + + bool ecc_en; }; #define SPI_MEM_OP(__cmd, __addr, __dummy, __data) \ @@ -223,9 +226,11 @@ static inline void *spi_mem_get_drvdata(struct spi_mem *mem) /** * struct spi_mem_controller_caps - SPI memory controller capabilities * @dtr: Supports DTR operations + * @ecc: Supports operations with error correction */ struct spi_mem_controller_caps { bool dtr; + bool ecc; }; /**