Add runtime PM support to the Tegra XHCI driver and move the function
calls to enable/disable the clocks, regulators and PHY into the runtime
PM callbacks.
Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
---
drivers/usb/host/xhci-tegra.c | 80 ++++++++++++++++++++++++++++++-------------
1 file changed, 56 insertions(+), 24 deletions(-)
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 02b0b24faa58..42aa67858b53 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -18,6 +18,7 @@
#include <linux/phy/tegra/xusb.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
+#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/slab.h>
@@ -1067,22 +1068,12 @@ static int tegra_xusb_probe(struct platform_device *pdev)
*/
platform_set_drvdata(pdev, tegra);
- err = tegra_xusb_clk_enable(tegra);
- if (err) {
- dev_err(&pdev->dev, "failed to enable clocks: %d\n", err);
- goto put_usb2;
- }
-
- err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
- if (err) {
- dev_err(&pdev->dev, "failed to enable regulators: %d\n", err);
- goto disable_clk;
- }
+ pm_runtime_enable(&pdev->dev);
- err = tegra_xusb_phy_enable(tegra);
+ err = pm_runtime_get_sync(&pdev->dev);
if (err < 0) {
- dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err);
- goto disable_regulator;
+ dev_err(&pdev->dev, "failed to enable device: %d\n", err);
+ goto disable_rpm;
}
tegra_xusb_ipfs_config(tegra, regs);
@@ -1090,7 +1081,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
err = tegra_xusb_load_firmware(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to load firmware: %d\n", err);
- goto disable_phy;
+ goto put_rpm;
}
tegra->hcd->regs = tegra->regs;
@@ -1100,7 +1091,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED);
if (err < 0) {
dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err);
- goto disable_phy;
+ goto put_rpm;
}
device_wakeup_enable(tegra->hcd->self.controller);
@@ -1155,13 +1146,10 @@ static int tegra_xusb_probe(struct platform_device *pdev)
usb_put_hcd(xhci->shared_hcd);
remove_usb2:
usb_remove_hcd(tegra->hcd);
-disable_phy:
- tegra_xusb_phy_disable(tegra);
-disable_regulator:
- regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
-disable_clk:
- tegra_xusb_clk_disable(tegra);
-put_usb2:
+put_rpm:
+ pm_runtime_put_sync(&pdev->dev);
+disable_rpm:
+ pm_runtime_disable(&pdev->dev);
usb_put_hcd(tegra->hcd);
put_padctl:
tegra_xusb_padctl_put(tegra->padctl);
@@ -1181,13 +1169,55 @@ static int tegra_xusb_remove(struct platform_device *pdev)
dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
tegra->fw.phys);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ tegra_xusb_padctl_put(tegra->padctl);
+
+ return 0;
+}
+
+static int tegra_xusb_runtime_suspend(struct device *dev)
+{
+ struct tegra_xusb *tegra = dev_get_drvdata(dev);
+
tegra_xusb_phy_disable(tegra);
regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
tegra_xusb_clk_disable(tegra);
- tegra_xusb_padctl_put(tegra->padctl);
+ return 0;
+}
+
+static int tegra_xusb_runtime_resume(struct device *dev)
+{
+ struct tegra_xusb *tegra = dev_get_drvdata(dev);
+ int err;
+
+ err = tegra_xusb_clk_enable(tegra);
+ if (err) {
+ dev_err(dev, "failed to enable clocks: %d\n", err);
+ return err;
+ }
+
+ err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
+ if (err) {
+ dev_err(dev, "failed to enable regulators: %d\n", err);
+ goto disable_clk;
+ }
+
+ err = tegra_xusb_phy_enable(tegra);
+ if (err < 0) {
+ dev_err(dev, "failed to enable PHYs: %d\n", err);
+ goto disable_regulator;
+ }
return 0;
+
+disable_regulator:
+ regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
+disable_clk:
+ tegra_xusb_clk_disable(tegra);
+ return err;
}
#ifdef CONFIG_PM_SLEEP
@@ -1211,6 +1241,8 @@ static int tegra_xusb_resume(struct device *dev)
#endif
static const struct dev_pm_ops tegra_xusb_pm_ops = {
+ SET_RUNTIME_PM_OPS(tegra_xusb_runtime_suspend,
+ tegra_xusb_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume)
};
--
2.7.4
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