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

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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
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@ -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;