From patchwork Tue Dec 14 11:41:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12675837 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 A05F8C433F5 for ; Tue, 14 Dec 2021 11:41:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231694AbhLNLly (ORCPT ); Tue, 14 Dec 2021 06:41:54 -0500 Received: from relay1-d.mail.gandi.net ([217.70.183.193]:52795 "EHLO relay1-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233641AbhLNLlx (ORCPT ); Tue, 14 Dec 2021 06:41:53 -0500 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay1-d.mail.gandi.net (Postfix) with ESMTPSA id 4381E240007; Tue, 14 Dec 2021 11:41:51 +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 04/13] spi: spi-mem: Create a helper to gather all the supports_op checks Date: Tue, 14 Dec 2021 12:41:31 +0100 Message-Id: <20211214114140.54629-5-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 So far we check the support for: - regular operations - dtr operations Soon, we will also need to check the support for ECC operations. As the combinatorial will increase exponentially, let's gather all the checks in a single generic function which takes a capabilities structure as input. This new helper is supposed to be called by the currently exported functions instead of repeating a similar implementation. Signed-off-by: Miquel Raynal --- drivers/spi/spi-mem.c | 34 +++++++++++++++++++++++++--------- include/linux/spi/spi-mem.h | 8 ++++++++ 2 files changed, 33 insertions(+), 9 deletions(-) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index 37f4443ce9a0..4c6944d7b174 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -160,26 +160,42 @@ static bool spi_mem_check_buswidth(struct spi_mem *mem, return true; } +static bool spi_mem_generic_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op, + struct spi_mem_controller_caps *caps) +{ + if (!caps->dtr) { + if (op->cmd.dtr || op->addr.dtr || + op->dummy.dtr || op->data.dtr) + return false; + + if (op->cmd.nbytes != 1) + return false; + } else { + if (op->cmd.nbytes != 2) + return false; + } + + return spi_mem_check_buswidth(mem, op); +} + bool spi_mem_dtr_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { - if (op->cmd.nbytes != 2) - return false; + struct spi_mem_controller_caps caps = { + .dtr = true, + }; - return spi_mem_check_buswidth(mem, op); + return spi_mem_generic_supports_op(mem, op, &caps); } EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op); bool spi_mem_default_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { - if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) - return false; + struct spi_mem_controller_caps caps = {}; - if (op->cmd.nbytes != 1) - return false; - - return spi_mem_check_buswidth(mem, op); + return spi_mem_generic_supports_op(mem, op, &caps); } 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 85e2ff7b840d..f365efcfb719 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -220,6 +220,14 @@ static inline void *spi_mem_get_drvdata(struct spi_mem *mem) return mem->drvpriv; } +/** + * struct spi_mem_controller_caps - SPI memory controller capabilities + * @dtr: Supports DTR operations + */ +struct spi_mem_controller_caps { + bool dtr; +}; + /** * struct spi_controller_mem_ops - SPI memory operations * @adjust_op_size: shrink the data xfer of an operation to match controller's