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usb: host: ohci-platform: Add basic runtime PM support 

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@vger.kernel.org
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2017-05-25 09:13:31 -07:00 committed by Greg Kroah-Hartman
parent fa72e6afa7
commit 0aa0b93e7a
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/host/ohci-platform.c
View File

@ -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 @@ err_power:
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:
@ -292,6 +296,7 @@ static int ohci_platform_remove(struct platform_device *dev)
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
int clk, rst;
pm_runtime_get_sync(&dev->dev);
usb_remove_hcd(hcd);
if (pdata->power_off)
@ -305,6 +310,9 @@ static int ohci_platform_remove(struct platform_device *dev)
usb_put_hcd(hcd);
pm_runtime_put_sync(&dev->dev);
pm_runtime_disable(&dev->dev);
if (pdata == &ohci_platform_defaults)
dev->dev.platform_data = NULL;