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=-19.1 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, 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 A9DB4C4332F for ; Thu, 16 Sep 2021 16:39:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A33E61BB4 for ; Thu, 16 Sep 2021 16:39:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244670AbhIPQj0 (ORCPT ); Thu, 16 Sep 2021 12:39:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:45378 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242114AbhIPQcD (ORCPT ); Thu, 16 Sep 2021 12:32:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7D1586187D; Thu, 16 Sep 2021 16:19:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631809190; bh=/ErntHcaJEsQ56aHKC6PQIMx9WCJFdbHYVtmhwh7Cw8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G7H1+yjL9rQ2b1LYBJk2m3kgjObAzp2PKWW9lc7XBW7gxI4OJh/3miGby7RYanlbp Z6RVIQY7WFDjF7abgh17RjGDwVWLpcJKZ9GjIqyNNCn9B+qCJuVbHV8zGJ2gNnXV2u 1u9fhwGUT6Hcfd/bmYFX30KYkchQ9JBsgKWQ4Eio= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hyun Kwon , Bharat Kumar Gogada , Michal Simek , Lorenzo Pieralisi Subject: [PATCH 5.13 063/380] PCI: xilinx-nwl: Enable the clock through CCF Date: Thu, 16 Sep 2021 17:57:00 +0200 Message-Id: <20210916155806.133735169@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916155803.966362085@linuxfoundation.org> References: <20210916155803.966362085@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: linux-kernel@vger.kernel.org From: Hyun Kwon commit de0a01f5296651d3a539f2d23d0db8f359483696 upstream. Enable PCIe reference clock. There is no remove function that's why this should be enough for simple operation. Normally this clock is enabled by default by firmware but there are usecases where this clock should be enabled by driver itself. It is also good that PCIe clock is recorded in a clock framework. Link: https://lore.kernel.org/r/ee6997a08fab582b1c6de05f8be184f3fe8d5357.1624618100.git.michal.simek@xilinx.com Fixes: ab597d35ef11 ("PCI: xilinx-nwl: Add support for Xilinx NWL PCIe Host Controller") Signed-off-by: Hyun Kwon Signed-off-by: Bharat Kumar Gogada Signed-off-by: Michal Simek Signed-off-by: Lorenzo Pieralisi Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/controller/pcie-xilinx-nwl.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/drivers/pci/controller/pcie-xilinx-nwl.c +++ b/drivers/pci/controller/pcie-xilinx-nwl.c @@ -6,6 +6,7 @@ * (C) Copyright 2014 - 2015, Xilinx, Inc. */ +#include #include #include #include @@ -169,6 +170,7 @@ struct nwl_pcie { u8 last_busno; struct nwl_msi msi; struct irq_domain *legacy_irq_domain; + struct clk *clk; raw_spinlock_t leg_mask_lock; }; @@ -823,6 +825,16 @@ static int nwl_pcie_probe(struct platfor return err; } + pcie->clk = devm_clk_get(dev, NULL); + if (IS_ERR(pcie->clk)) + return PTR_ERR(pcie->clk); + + err = clk_prepare_enable(pcie->clk); + if (err) { + dev_err(dev, "can't enable PCIe ref clock\n"); + return err; + } + err = nwl_pcie_bridge_init(pcie); if (err) { dev_err(dev, "HW Initialization failed\n");