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Date:   Fri, 27 Apr 2018 12:08:22 +0200
From:   Thierry Reding <>
To:     Jon Hunter <>
Cc:     Mathias Nyman <>,
        Greg Kroah-Hartman <>,,,
Subject: Re: [PATCH V2 1/3] usb: xhci: tegra: Prepare for adding runtime PM

On Thu, Apr 26, 2018 at 03:59:08PM +0100, Jon Hunter wrote:
> When adding runtime PM support to the Tegra XHCI driver, it is desirable
> to move the function calls to enable the clocks, regulators and PHY from
> the tegra_xusb_probe into the runtime PM handlers. Currently, the
> clocks, regulators and PHY are all enabled before we call
> usb_create_hcd() in tegra_xusb_probe(), however, we cannot call
> pm_runtime_get_sync() at this point because the platform device data is
> not yet initialised. Fortunately, the function usb_create_hcd() can be
> called before we enable the clocks, regulators and PHY and so prepare
> for adding runtime PM support, by moving the call to usb_create_hcd()
> before we enable the hardware.
> Signed-off-by: Jon Hunter <>

Acked-by: Thierry Reding <>

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