From mboxrd@z Thu Jan 1 00:00:00 1970 From: marex@denx.de (Marek Vasut) Date: Thu, 12 Dec 2013 22:50:00 +0100 Subject: [PATCH V2 3/7] PCI: imx6: Split away the PHY reset In-Reply-To: <1386885004-10252-1-git-send-email-marex@denx.de> References: <1386885004-10252-1-git-send-email-marex@denx.de> Message-ID: <1386885004-10252-3-git-send-email-marex@denx.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Split the PCIe PHY reset from the link up function to make the code a little more structured. Signed-off-by: Marek Vasut 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 | 35 +++++++++++++++++++---------------- 1 file changed, 19 insertions(+), 16 deletions(-) V2: Drop unused 'temp' variable. diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index f5541c3..4983784 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -336,9 +336,26 @@ static void imx6_pcie_host_init(struct pcie_port *pp) return; } +static void imx6_pcie_reset_phy(struct pcie_port *pp) +{ + uint32_t temp; + + pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp); + temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN | + PHY_RX_OVRD_IN_LO_RX_PLL_EN); + pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp); + + usleep_range(2000, 3000); + + pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp); + temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN | + PHY_RX_OVRD_IN_LO_RX_PLL_EN); + pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp); +} + static int imx6_pcie_link_up(struct pcie_port *pp) { - u32 rc, ltssm, rx_valid, temp; + u32 rc, ltssm, rx_valid; /* * Test if the PHY reports that the link is up and also that @@ -370,21 +387,7 @@ static int imx6_pcie_link_up(struct pcie_port *pp) dev_err(pp->dev, "transition to gen2 is stuck, reset PHY!\n"); - pcie_phy_read(pp->dbi_base, - PHY_RX_OVRD_IN_LO, &temp); - temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN - | PHY_RX_OVRD_IN_LO_RX_PLL_EN); - pcie_phy_write(pp->dbi_base, - PHY_RX_OVRD_IN_LO, temp); - - usleep_range(2000, 3000); - - pcie_phy_read(pp->dbi_base, - PHY_RX_OVRD_IN_LO, &temp); - temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN - | PHY_RX_OVRD_IN_LO_RX_PLL_EN); - pcie_phy_write(pp->dbi_base, - PHY_RX_OVRD_IN_LO, temp); + imx6_pcie_reset_phy(pp); return 0; } -- 1.8.4.3