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=-20.2 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=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 87F91C433F5 for ; Mon, 20 Sep 2021 17:21:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71B16632A4 for ; Mon, 20 Sep 2021 17:21:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349345AbhITRWu (ORCPT ); Mon, 20 Sep 2021 13:22:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:46334 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347027AbhITRUv (ORCPT ); Mon, 20 Sep 2021 13:20:51 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 90AD06140F; Mon, 20 Sep 2021 17:00:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632157240; bh=R8SVc7jjCFfqYbEn86cu7/h+JZSJQokXW6RfvsCjOP8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YGvz5BhN+bFr9nm9qg7FTIK5gKjnT5+k4fu6HZNXFfyoIgP7fvN9lxoGMurR7K+z7 C5LVuZ6Cnl4aZHysevkF3bfykOFigeFpFXtTiiaNrDht3lgpF1X6I/8NIYbbBDhJdM pRZ2eVDXPWKX12vQpCI5Wn8mDDqot21X1tVv5fGg= 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 4.14 118/217] PCI: xilinx-nwl: Enable the clock through CCF Date: Mon, 20 Sep 2021 18:42:19 +0200 Message-Id: <20210920163928.660419640@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163924.591371269@linuxfoundation.org> References: <20210920163924.591371269@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: 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/host/pcie-xilinx-nwl.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/drivers/pci/host/pcie-xilinx-nwl.c +++ b/drivers/pci/host/pcie-xilinx-nwl.c @@ -10,6 +10,7 @@ * (at your option) any later version. */ +#include #include #include #include @@ -171,6 +172,7 @@ struct nwl_pcie { u8 root_busno; struct nwl_msi msi; struct irq_domain *legacy_irq_domain; + struct clk *clk; raw_spinlock_t leg_mask_lock; }; @@ -852,6 +854,16 @@ 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");