PCI: rcar: Add runtime PM support
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>
diff --git a/drivers/pci/host/pci-rcar-gen2.c b/drivers/pci/host/pci-rcar-gen2.c
index 96d1182..ceec147 100644
--- a/drivers/pci/host/pci-rcar-gen2.c
+++ b/drivers/pci/host/pci-rcar-gen2.c
@@ -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 @@
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 @@
priv->irq = platform_get_irq(pdev, 0);
priv->reg = reg;
+ priv->dev = &pdev->dev;
return rcar_pci_add_controller(priv);
}