From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ulrich Hecht Date: Wed, 20 Nov 2013 17:38:03 +0000 Subject: [PATCH 6/9] pci: rcar-gen2: enable clock Message-Id: <1384969086-8920-7-git-send-email-ulrich.hecht@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org Makes the PCI host controllers come alive. Signed-off-by: Ulrich Hecht --- drivers/pci/host/pci-rcar-gen2.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/pci/host/pci-rcar-gen2.c b/drivers/pci/host/pci-rcar-gen2.c index cbaa5c4..568ff8e 100644 --- a/drivers/pci/host/pci-rcar-gen2.c +++ b/drivers/pci/host/pci-rcar-gen2.c @@ -9,6 +9,7 @@ * published by the Free Software Foundation. */ +#include #include #include #include @@ -77,6 +78,7 @@ #define RCAR_PCI_NR_CONTROLLERS 3 struct rcar_pci_priv { + struct clk *clk; void __iomem *reg; struct resource io_res; struct resource mem_res; @@ -169,6 +171,9 @@ static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys) void __iomem *reg = priv->reg; u32 val; + clk_prepare_enable(priv->clk); + udelay(4); + val = ioread32(reg + RCAR_PCI_UNIT_REV_REG); pr_info("PCI: bus%u revision %x\n", sys->busnr, val); @@ -273,6 +278,7 @@ static int __init rcar_pci_probe(struct platform_device *pdev) struct resource *cfg_res, *mem_res; struct rcar_pci_priv *priv; void __iomem *reg; + struct clk *clk; cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); reg = devm_ioremap_resource(&pdev->dev, cfg_res); @@ -288,6 +294,12 @@ static int __init rcar_pci_probe(struct platform_device *pdev) if (!priv) return -ENOMEM; + clk = devm_clk_get(&pdev->dev, "usbpci"); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "Can't get clock\n"); + return PTR_ERR(clk); + } + priv->mem_res = *mem_res; /* * The controller does not support/use port I/O, @@ -302,6 +314,8 @@ static int __init rcar_pci_probe(struct platform_device *pdev) priv->irq = platform_get_irq(pdev, 0); priv->reg = reg; + priv->clk = clk; + return rcar_pci_add_controller(priv); } -- 1.8.4