From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-out.m-online.net ([212.18.0.9]:33846 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751579Ab3LLVu0 (ORCPT ); Thu, 12 Dec 2013 16:50:26 -0500 From: Marek Vasut To: linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Richard Zhu , Bjorn Helgaas , Frank Li , Harro Haan , Jingoo Han , Mohit KUMAR , Pratyush Anand , Sascha Hauer , Sean Cross , Shawn Guo , Siva Reddy Kallam , Srikanth T Shivanand , Tim Harvey , Troy Kisky , Yinghai Lu Subject: [PATCH 6/7] PCI: imx6: Fix bugs in PCIe startup code Date: Thu, 12 Dec 2013 22:50:03 +0100 Message-Id: <1386885004-10252-6-git-send-email-marex@denx.de> In-Reply-To: <1386885004-10252-1-git-send-email-marex@denx.de> References: <1386885004-10252-1-git-send-email-marex@denx.de> Sender: linux-pci-owner@vger.kernel.org List-ID: From: Richard Zhu - LTSSM shouldn't be set once in assert_core_reset - Move peripheral reset just before LTSSM start From: Richard Zhu Signed-off-by: Richard Zhu Cc: Bjorn Helgaas Cc: Frank Li Cc: Harro Haan Cc: Jingoo Han Cc: Mohit KUMAR Cc: Pratyush Anand Cc: Richard Zhu Cc: Sascha Hauer Cc: Sean Cross Cc: Shawn Guo Cc: Siva Reddy Kallam Cc: Srikanth T Shivanand Cc: Tim Harvey Cc: Troy Kisky Cc: Yinghai Lu --- drivers/pci/host/pci-imx6.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index a945e74..7985272 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -220,18 +220,9 @@ static int imx6_pcie_assert_core_reset(struct pcie_port *pp) regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); - /* Some boards don't have PCIe reset GPIO. */ - if (gpio_is_valid(imx6_pcie->reset_gpio)) { - gpio_set_value(imx6_pcie->reset_gpio, 0); - msleep(100); - gpio_set_value(imx6_pcie->reset_gpio, 1); - } - return 0; } @@ -275,6 +266,12 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) /* allow the clocks to stabilize */ usleep_range(200, 500); + /* Some boards don't have PCIe reset GPIO. */ + if (gpio_is_valid(imx6_pcie->reset_gpio)) { + gpio_set_value(imx6_pcie->reset_gpio, 0); + msleep(100); + gpio_set_value(imx6_pcie->reset_gpio, 1); + } return 0; err_pcie_axi: -- 1.8.4.3