From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0B16C433E4 for ; Tue, 14 Jul 2020 18:53:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CDA422B51 for ; Tue, 14 Jul 2020 18:53:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594752818; bh=XedFlO1QM2ZHmpdMk6/Pd+m5+8FBosx+3XqZsu01g2Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MCy3RAZUDmKH8RQLor/BoaJHfci7M1kImyXz5G04CHzaiz3pvlsNIRICmmt2xLtx+ aWJrIqr/NuU4Eb/esQRfngwt8m4sDcd6eTlnrB238RRfgV+DVVcbXSzghWUDHmUVK3 r9+9s3kKpqR3UQuy/HZ1VfY6OF1qOwYIxV+FaNUk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730279AbgGNSxi (ORCPT ); Tue, 14 Jul 2020 14:53:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:50648 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730646AbgGNSxc (ORCPT ); Tue, 14 Jul 2020 14:53:32 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5887322B45; Tue, 14 Jul 2020 18:53:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594752811; bh=XedFlO1QM2ZHmpdMk6/Pd+m5+8FBosx+3XqZsu01g2Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UXTbpg3Y+HVhb34XzeXk1J96rSwXO9TzF8Sby1hRvDOX42R9fRRKMNZ+IuqQ6mV1r GO/Kq+dKwaPYuPiyPE+IvshGUnLqIUmyar2ntlelmm+MzKgm9Q0FKcjO0bPXfvFW1F BFFnHiS0IHlbTbobK7LLnJSexJuQA5FyIgFnGWmY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peng Ma , Mark Brown , Sasha Levin Subject: [PATCH 5.7 002/166] spi: spi-fsl-dspi: Adding shutdown hook Date: Tue, 14 Jul 2020 20:42:47 +0200 Message-Id: <20200714184115.966826177@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200714184115.844176932@linuxfoundation.org> References: <20200714184115.844176932@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Peng Ma [ Upstream commit dc234825997ec6ff05980ca9e2204f4ac3f8d695 ] We need to ensure dspi controller could be stopped in order for kexec to start the next kernel. So add the shutdown operation support. Signed-off-by: Peng Ma Link: https://lore.kernel.org/r/20200424061216.27445-1-peng.ma@nxp.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-fsl-dspi.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 856a4a0edcc7a..89d403dfb3bdf 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+ // // Copyright 2013 Freescale Semiconductor, Inc. +// Copyright 2020 NXP // // Freescale DSPI driver // This file contains a driver for the Freescale DSPI @@ -26,6 +27,9 @@ #define SPI_MCR_CLR_TXF BIT(11) #define SPI_MCR_CLR_RXF BIT(10) #define SPI_MCR_XSPI BIT(3) +#define SPI_MCR_DIS_TXF BIT(13) +#define SPI_MCR_DIS_RXF BIT(12) +#define SPI_MCR_HALT BIT(0) #define SPI_TCR 0x08 #define SPI_TCR_GET_TCNT(x) (((x) & GENMASK(31, 16)) >> 16) @@ -1446,6 +1450,24 @@ static int dspi_remove(struct platform_device *pdev) return 0; } +static void dspi_shutdown(struct platform_device *pdev) +{ + struct spi_controller *ctlr = platform_get_drvdata(pdev); + struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr); + + /* Disable RX and TX */ + regmap_update_bits(dspi->regmap, SPI_MCR, + SPI_MCR_DIS_TXF | SPI_MCR_DIS_RXF, + SPI_MCR_DIS_TXF | SPI_MCR_DIS_RXF); + + /* Stop Running */ + regmap_update_bits(dspi->regmap, SPI_MCR, SPI_MCR_HALT, SPI_MCR_HALT); + + dspi_release_dma(dspi); + clk_disable_unprepare(dspi->clk); + spi_unregister_controller(dspi->ctlr); +} + static struct platform_driver fsl_dspi_driver = { .driver.name = DRIVER_NAME, .driver.of_match_table = fsl_dspi_dt_ids, @@ -1453,6 +1475,7 @@ static struct platform_driver fsl_dspi_driver = { .driver.pm = &dspi_pm, .probe = dspi_probe, .remove = dspi_remove, + .shutdown = dspi_shutdown, }; module_platform_driver(fsl_dspi_driver); -- 2.25.1