From patchwork Fri Dec 17 16:16:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12685243 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 9EECAC433FE for ; Fri, 17 Dec 2021 16:17:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235452AbhLQQRS (ORCPT ); Fri, 17 Dec 2021 11:17:18 -0500 Received: from relay12.mail.gandi.net ([217.70.178.232]:54923 "EHLO relay12.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233694AbhLQQRR (ORCPT ); Fri, 17 Dec 2021 11:17:17 -0500 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay12.mail.gandi.net (Postfix) with ESMTPSA id C07D320000D; Fri, 17 Dec 2021 16:17:14 +0000 (UTC) From: Miquel Raynal To: Mark Brown , , Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Pratyush Yadav , Michael Walle , Cc: Julien Su , Jaime Liao , Thomas Petazzoni , Boris Brezillon , Miquel Raynal Subject: [PATCH v7 07/14] spi: spi-mem: Add an ecc_en parameter to the spi_mem_op structure Date: Fri, 17 Dec 2021 17:16:47 +0100 Message-Id: <20211217161654.367782-8-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211217161654.367782-1-miquel.raynal@bootlin.com> References: <20211217161654.367782-1-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_supports_op(). Signed-off-by: Miquel Raynal Acked-by: Pratyush Yadav --- 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 cfe1c99db5f3..94758e7e747d 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -178,6 +178,11 @@ bool spi_mem_default_supports_op(struct spi_mem *mem, return false; } + if (op->ecc_en) { + if (!spi_mem_controller_is_capable(ctlr, ecc)) + return false; + } + return spi_mem_check_buswidth(mem, op); } 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 d7787c8f3746..e9238a858109 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_controller_mem_caps - SPI memory controller capabilities * @dtr: Supports DTR operations + * @ecc: Supports operations with error correction */ struct spi_controller_mem_caps { bool dtr; + bool ecc; }; #define spi_mem_controller_is_capable(ctlr, cap) \