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: devicet...@vger.kernel.org
Cc: Hans de Goede <hdego...@redhat.com>
Cc: Rob Herring <r...@kernel.org>
Cc: Roger Quadros <rog...@ti.com>
Cc: Sebastian Reichel <sebastian.reic...@collabora.co.uk>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
Signed-off-by: Tony Lindgren <t...@atomide.com>
---
Alan, do you have some better ideas for the ohci_platform_remove()
path below?
---
drivers/usb/host/ohci-platform.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
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>
@@ -242,6 +243,8 @@ static int ohci_platform_probe(struct platform_device *dev)
}
#endif
+ pm_runtime_set_active(&dev->dev);
+ pm_runtime_enable(&dev->dev);
if (pdata->power_on) {
err = pdata->power_on(dev);
if (err < 0)
@@ -271,6 +274,7 @@ 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:
@@ -290,7 +294,14 @@ static int ohci_platform_remove(struct platform_device
*dev)
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
- int clk, rst;
+ int clk, rst, enabled;
+
+ enabled = pm_runtime_get_sync(&dev->dev);
+ if (enabled < 0) {
+ dev_warn(&dev->dev, "pm_runtime_get failed: %i\n",
+ enabled);
+ pm_runtime_put_noidle(&dev->dev);
+ }
usb_remove_hcd(hcd);
@@ -305,6 +316,10 @@ static int ohci_platform_remove(struct platform_device
*dev)
usb_put_hcd(hcd);
+ if (enabled >= 0)
+ pm_runtime_put_sync(&dev->dev);
+ pm_runtime_disable(&dev->dev);
+
if (pdata == &ohci_platform_defaults)
dev->dev.platform_data = NULL;
--
2.13.0
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