This is needed in preparation of adding support for omap3 and
later OHCI. The runtime PM will only do something on platforms
that implement it.
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Roger Quadros <rogerq@xxxxxx>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
drivers/usb/host/ohci-platform.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -24,6 +24,7 @@
#include <linux/err.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/usb/ohci_pdriver.h>
#include <linux/usb.h>
@@ -51,6 +52,10 @@ static int ohci_platform_power_on(struct platform_device *dev)
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
int clk, ret, phy_num;
+ ret = pm_runtime_get_sync(&dev->dev);
+ if (ret < 0)
+ return ret;
+
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
ret = clk_prepare_enable(priv->clks[clk]);
if (ret)
@@ -96,6 +101,8 @@ static void ohci_platform_power_off(struct platform_device *dev)
for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
if (priv->clks[clk])
clk_disable_unprepare(priv->clks[clk]);
+
+ pm_runtime_put_sync(&dev->dev);
}
static struct hc_driver __read_mostly ohci_platform_hc_driver;
@@ -242,6 +249,7 @@ static int ohci_platform_probe(struct platform_device *dev)
}
#endif
+ pm_runtime_enable(&dev->dev);
if (pdata->power_on) {
err = pdata->power_on(dev);
if (err < 0)
@@ -271,6 +279,7 @@ static int ohci_platform_probe(struct platform_device *dev)
if (pdata->power_off)
pdata->power_off(dev);
err_reset:
+ pm_runtime_disable(&dev->dev);
while (--rst >= 0)
reset_control_assert(priv->resets[rst]);
err_put_clks:
@@ -305,6 +314,8 @@ static int ohci_platform_remove(struct platform_device *dev)
usb_put_hcd(hcd);
+ pm_runtime_disable(&dev->dev);
+
if (pdata == &ohci_platform_defaults)
dev->dev.platform_data = NULL;
--
2.13.0
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