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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D0F25C4338F for ; Mon, 26 Jul 2021 15:49:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B1D7360FE5 for ; Mon, 26 Jul 2021 15:49:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235273AbhGZPIz (ORCPT ); Mon, 26 Jul 2021 11:08:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:47822 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235415AbhGZPHR (ORCPT ); Mon, 26 Jul 2021 11:07:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6EB9A60F42; Mon, 26 Jul 2021 15:47:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1627314466; bh=ENInDegHQh2n8CYuWaJRzlJ4xYZWu6LrgTvRtzb4JW0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aoQuz++Kxn6BKOg3dZrpM7NYp6jCmM9WEvu+rxZM7l5TeHpoJYuJPMlPd6RND08VR 7b0BO+JN5YTgKmqsUmJKYWjfMNtjCFETfE0B+hdn/++S925q2i7tnVydlobdkKsal6 e2trhtOUInP/EWTjIeDUANBYx1ZWqaMhv5yebeMk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marek Vasut , Charles Keepax , Mark Brown , Sasha Levin Subject: [PATCH 4.14 56/82] spi: cadence: Correct initialisation of runtime PM again Date: Mon, 26 Jul 2021 17:38:56 +0200 Message-Id: <20210726153829.997836304@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210726153828.144714469@linuxfoundation.org> References: <20210726153828.144714469@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marek Vasut [ Upstream commit 56912da7a68c8356df6a6740476237441b0b792a ] The original implementation of RPM handling in probe() was mostly correct, except it failed to call pm_runtime_get_*() to activate the hardware. The subsequent fix, 734882a8bf98 ("spi: cadence: Correct initialisation of runtime PM"), breaks the implementation further, to the point where the system using this hard IP on ZynqMP hangs on boot, because it accesses hardware which is gated off. Undo 734882a8bf98 ("spi: cadence: Correct initialisation of runtime PM") and instead add missing pm_runtime_get_noresume() and move the RPM disabling all the way to the end of probe(). That makes ZynqMP not hang on boot yet again. Fixes: 734882a8bf98 ("spi: cadence: Correct initialisation of runtime PM") Signed-off-by: Marek Vasut Cc: Charles Keepax Cc: Mark Brown Link: https://lore.kernel.org/r/20210716182133.218640-1-marex@denx.de Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-cadence.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c index 9ed5f0010e44..d9aeb9efa7aa 100644 --- a/drivers/spi/spi-cadence.c +++ b/drivers/spi/spi-cadence.c @@ -585,6 +585,12 @@ static int cdns_spi_probe(struct platform_device *pdev) goto clk_dis_apb; } + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT); + pm_runtime_get_noresume(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + ret = of_property_read_u32(pdev->dev.of_node, "num-cs", &num_cs); if (ret < 0) master->num_chipselect = CDNS_SPI_DEFAULT_NUM_CS; @@ -599,11 +605,6 @@ static int cdns_spi_probe(struct platform_device *pdev) /* SPI controller initializations */ cdns_spi_init_hw(xspi); - pm_runtime_set_active(&pdev->dev); - pm_runtime_enable(&pdev->dev); - pm_runtime_use_autosuspend(&pdev->dev); - pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT); - irq = platform_get_irq(pdev, 0); if (irq <= 0) { ret = -ENXIO; @@ -636,6 +637,9 @@ static int cdns_spi_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_MASK(8); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); + ret = spi_register_master(master); if (ret) { dev_err(&pdev->dev, "spi_register_master failed\n"); -- 2.30.2