On 18/05/17 01:59, Tony Lindgren wrote:
> 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>
Acked-by: Roger Quadros <rogerq@xxxxxx>
> ---
> 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;
>
>
--
cheers,
-roger
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