Makes the PCI host controllers come alive.
Signed-off-by: Ulrich Hecht <ulrich.hecht@xxxxxxxxx>
---
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 <linux/clk.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -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
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