From patchwork Wed Oct 12 02:05:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 680985 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3sty595Dg2z9t1d for ; Wed, 12 Oct 2016 13:10:53 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932427AbcJLCKv (ORCPT ); Tue, 11 Oct 2016 22:10:51 -0400 Received: from lucky1.263xmail.com ([211.157.147.133]:55486 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932424AbcJLCKt (ORCPT ); Tue, 11 Oct 2016 22:10:49 -0400 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.164]) by lucky1.263xmail.com (Postfix) with ESMTP id 39FD854324; Wed, 12 Oct 2016 09:58:51 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED4: 1 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 7D95D3D0; Wed, 12 Oct 2016 09:58:50 +0800 (CST) X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: bhelgaas@google.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: shawn.lin@rock-chips.com X-UNIQUE-TAG: <948b8f41d4f38ab5cf2f3f8bac5dc15e> X-ATTACHMENT-NUM: 0 X-SENDER: lintao@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 10104EAZH8W; Wed, 12 Oct 2016 09:58:51 +0800 (CST) From: Shawn Lin To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, linux-rockchip@lists.infradead.org, Rajat Jain , Wenrui Li , Brian Norris , Shawn Lin Subject: [PATCH v3 2/3] PCI: rockchip: Mark RC as common clock architecture Date: Wed, 12 Oct 2016 10:05:02 +0800 Message-Id: <1476237903-15076-2-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1476237903-15076-1-git-send-email-shawn.lin@rock-chips.com> References: <1476237903-15076-1-git-send-email-shawn.lin@rock-chips.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The default value of common clock configuration is zero indicating Rockchip's RC is using asynchronous clock architecture but actually we are using common clock. This will confuses some EP drivers if they need some different settings referring to this value. So let's fix it. Signed-off-by: Shawn Lin --- Changes in v3: - rebase the code since it isn't cleanly applied again Changes in v2: - rebase the code since it isn't cleanly applied after Bjorn's cleanup drivers/pci/host/pcie-rockchip.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index a67ff9e..d51afe6 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -141,6 +141,7 @@ #define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26 #define PCIE_RC_CONFIG_LCS (PCIE_RC_CONFIG_BASE + 0xd0) #define PCIE_RC_CONFIG_LCS_RETRAIN_LINK BIT(5) +#define PCIE_RC_CONFIG_LCS_CCC BIT(6) #define PCIE_RC_CONFIG_LCS_LBMIE BIT(10) #define PCIE_RC_CONFIG_LCS_LABIE BIT(11) #define PCIE_RC_CONFIG_LCS_LBMS BIT(30) @@ -540,6 +541,11 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip_pcie) rockchip_pcie_set_power_limit(rockchip_pcie); + /* Set RC's clock architecture as common clock */ + status = rockchip_pcie_readl(rockchip_pcie, PCIE_RC_CONFIG_LCS); + status |= PCIE_RC_CONFIG_LCS_CCC; + rockchip_pcie_writel(rockchip_pcie, PCIE_RC_CONFIG_LCS, status); + /* Enable Gen1 training */ rockchip_pcie_writel(rockchip_pcie, PCIE_CLIENT_CONFIG, PCIE_CLIENT_LINK_TRAIN_ENABLE);