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PCI: rcar: Add runtime PM support

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If runtime PM is enabled in the kernel config, the PCI clocks are not
forced on at start-up, and thus, are never enabled.  Use
pm_runtime_get_sync() to enable the clocks.

While at it, use dev_info() instead of pr_info() since now we have the
device pointer available in the PCI setup callback.

Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Valentine Barshak 2013-12-04 20:33:35 +04:00 committed by Bjorn Helgaas
parent c176d1c71b
commit fb178d8b2f
1 changed files with 7 additions and 1 deletions
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8
drivers/pci/host/pci-rcar-gen2.c
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@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
/* AHB-PCI Bridge PCI communication registers */
@ -77,6 +78,7 @@
#define RCAR_PCI_NR_CONTROLLERS 3
struct rcar_pci_priv {
struct device *dev;
void __iomem *reg;
struct resource io_res;
struct resource mem_res;
@ -169,8 +171,11 @@ static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
void __iomem *reg = priv->reg;
u32 val;
pm_runtime_enable(priv->dev);
pm_runtime_get_sync(priv->dev);
val = ioread32(reg + RCAR_PCI_UNIT_REV_REG);
pr_info("PCI: bus%u revision %x\n", sys->busnr, val);
dev_info(priv->dev, "PCI: bus%u revision %x\n", sys->busnr, val);
/* Disable Direct Power Down State and assert reset */
val = ioread32(reg + RCAR_USBCTR_REG) & ~RCAR_USBCTR_DIRPD;
@ -301,6 +306,7 @@ static int __init rcar_pci_probe(struct platform_device *pdev)
priv->irq = platform_get_irq(pdev, 0);
priv->reg = reg;
priv->dev = &pdev->dev;
return rcar_pci_add_controller(priv);
}