From patchwork Thu Feb 9 20:02:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Zhang X-Patchwork-Id: 652313 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 1F253C61DA4 for ; Thu, 9 Feb 2023 20:04:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230097AbjBIUEc (ORCPT ); Thu, 9 Feb 2023 15:04:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230175AbjBIUE3 (ORCPT ); Thu, 9 Feb 2023 15:04:29 -0500 Received: from relay.smtp-ext.broadcom.com (lpdvsmtp11.broadcom.com [192.19.166.231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B8765ACCE; Thu, 9 Feb 2023 12:04:20 -0800 (PST) Received: from mail-lvn-it-01.lvn.broadcom.net (mail-lvn-it-01.lvn.broadcom.net [10.75.146.107]) by relay.smtp-ext.broadcom.com (Postfix) with ESMTP id B3408C0000E6; Thu, 9 Feb 2023 12:04:19 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com B3408C0000E6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1675973059; bh=LSc6gVvW76JeEdaqRanq1SO6TNyQn+Rx8s3TB2RHs+U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b4xjI1Xjl7GoqsvSX9mfpPDXvbmcVREZ+OPzPV+1lTdUT+w1cMYwRJYakcQrZU/Zr Orkxbv4vTQY5ps56xU5E/pTxUVjM+NsTftA3L2btWs57Hhp+sRoro86Pv+abtwTsnQ daey4sHS9RmRUixY5jyrIzYafp0SdAZF9h8XLyc4= Received: from bcacpedev-irv-3.lvn.broadcom.net (bcacpedev-irv-3.lvn.broadcom.net [10.75.138.105]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail-lvn-it-01.lvn.broadcom.net (Postfix) with ESMTPS id B071A18041CAC7; Thu, 9 Feb 2023 12:04:19 -0800 (PST) Received: by bcacpedev-irv-3.lvn.broadcom.net (Postfix, from userid 28376) id EF725101B7B; Thu, 9 Feb 2023 12:04:12 -0800 (PST) From: William Zhang To: Linux SPI List , Broadcom Kernel List Cc: f.fainelli@gmail.com, dregan@mail.com, joel.peshkin@broadcom.com, dan.beygelman@broadcom.com, anand.gore@broadcom.com, kursad.oney@broadcom.com, tomer.yacoby@broadcom.com, jonas.gorski@gmail.com, William Zhang , Mark Brown , linux-kernel@vger.kernel.org Subject: [PATCH v4 08/15] spi: export spi_transfer_cs_change_delay_exec function Date: Thu, 9 Feb 2023 12:02:39 -0800 Message-Id: <20230209200246.141520-9-william.zhang@broadcom.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20230209200246.141520-1-william.zhang@broadcom.com> References: <20230209200246.141520-1-william.zhang@broadcom.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org For SPI controller that implements transfer_one_message, it needs to insert the delay that required by cs change event between the transfers. Add a wrapper for the local function _spi_transfer_cs_change_delay_exec and export it for SPI controller driver to use. Signed-off-by: William Zhang --- Changes in v4: - Rebase using the latest linux spi git for-next branch code drivers/spi/spi.c | 7 +++++++ include/linux/spi/spi.h | 5 +++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 21a8c3a8eee4..f4eb447c565d 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1483,6 +1483,13 @@ static void _spi_transfer_cs_change_delay(struct spi_message *msg, } } +void spi_transfer_cs_change_delay_exec(struct spi_message *msg, + struct spi_transfer *xfer) +{ + _spi_transfer_cs_change_delay(msg, xfer); +} +EXPORT_SYMBOL_GPL(spi_transfer_cs_change_delay_exec); + /* * spi_transfer_one_message - Default implementation of transfer_one_message() * diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 9b23a1d0dd0d..88cb2a1390ce 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -26,6 +26,7 @@ struct spi_controller; struct spi_transfer; struct spi_controller_mem_ops; struct spi_controller_mem_caps; +struct spi_message; /* * INTERFACES between SPI master-side drivers and SPI slave protocol handlers, @@ -119,6 +120,8 @@ struct spi_delay { extern int spi_delay_to_ns(struct spi_delay *_delay, struct spi_transfer *xfer); extern int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer); +extern void spi_transfer_cs_change_delay_exec(struct spi_message *msg, + struct spi_transfer *xfer); /** * struct spi_device - Controller side proxy for an SPI slave device @@ -283,8 +286,6 @@ static inline void spi_set_csgpiod(struct spi_device *spi, u8 idx, struct gpio_d spi->cs_gpiod = csgpiod; } -struct spi_message; - /** * struct spi_driver - Host side "protocol" driver * @id_table: List of SPI devices supported by this driver