From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: [PATCH 1/4] usb: host: ohci-platform: Add basic runtime PM support Date: Wed, 17 May 2017 15:59:19 -0700 Message-ID: <20170517225922.17723-2-tony@atomide.com> References: <20170517225922.17723-1-tony@atomide.com> Return-path: In-Reply-To: <20170517225922.17723-1-tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Alan Stern Cc: Greg Kroah-Hartman , linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Hans de Goede , Rob Herring , Roger Quadros , Yoshihiro Shimoda List-Id: devicetree@vger.kernel.org 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-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Hans de Goede Cc: Rob Herring Cc: Roger Quadros Cc: Yoshihiro Shimoda Signed-off-by: Tony Lindgren --- 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 #include #include +#include #include #include #include @@ -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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html