From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f171.google.com ([209.85.212.171]:38832 "EHLO mail-wi0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758208AbaHZO5z (ORCPT ); Tue, 26 Aug 2014 10:57:55 -0400 From: Thierry Reding To: Bjorn Helgaas Cc: Stephen Warren , linux-pci@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/6] PCI: tegra: Clear CLKREQ# enable on port disable Date: Tue, 26 Aug 2014 16:57:41 +0200 Message-Id: <1409065064-17617-4-git-send-email-thierry.reding@gmail.com> In-Reply-To: <1409065064-17617-1-git-send-email-thierry.reding@gmail.com> References: <1409065064-17617-1-git-send-email-thierry.reding@gmail.com> Sender: linux-pci-owner@vger.kernel.org List-ID: From: Thierry Reding When a root port is disabled, disable the CLKREQ# signal if available. Signed-off-by: Thierry Reding --- drivers/pci/host/pci-tegra.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 83fa33e16650..bd53b123218b 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -569,6 +569,7 @@ static void tegra_pcie_port_enable(struct tegra_pcie_port *port) static void tegra_pcie_port_disable(struct tegra_pcie_port *port) { + const struct tegra_pcie_soc_data *soc = port->pcie->soc_data; unsigned long ctrl = tegra_pcie_port_get_pex_ctrl(port); unsigned long value; @@ -579,6 +580,10 @@ static void tegra_pcie_port_disable(struct tegra_pcie_port *port) /* disable reference clock */ value = afi_readl(port->pcie, ctrl); + + if (soc->has_pex_clkreq_en) + value &= ~AFI_PEX_CTRL_CLKREQ_EN; + value &= ~AFI_PEX_CTRL_REFCLK_EN; afi_writel(port->pcie, value, ctrl); } -- 2.0.4