On Fri, Oct 12, 2018 at 09:41:35AM +0100, Jon Hunter wrote: > > On 11/10/18 17:47, Thierry Reding wrote: > > On Fri, Sep 28, 2018 at 03:11:48PM +0100, Jon Hunter wrote: > >> The generic power-domain framework has been updated to allow devices > >> that require more than one power-domain to create a new device for > >> each power-domain required and then link these new power-domain > >> devices to the consumer device. > >> > >> Update the Tegra xHCI driver to use the new APIs provided by the > >> generic power-domain framework so we can use the generic power-domain > >> framework for managing the xHCI controllers power-domains. Please > >> note that to maintain backward compatibility with older device-tree > >> blobs these new generic power-domain APIs are only used if the > >> 'power-domains' property is present and otherwise we fall back to > >> using the legacy Tegra APIs for managing the power-domains. > >> > >> Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx> > >> --- > >> drivers/usb/host/xhci-tegra.c | 89 +++++++++++++++++++++++++++++++++++++------ > >> 1 file changed, 77 insertions(+), 12 deletions(-) > > > > It'd be nice if we could eventually get rid of the legacy Tegra APIs, > > but that's a separate issue, and this patch looks fine as-is: > > Unfortunately, I don't think it is possible as it will break DT backward > compatibility. However, one way to do it would be to force on all power > domains on boot if PM is not supported. Yeah, that sounds like a good option. If we don't support PM the I imagine there's little use in keeping some of the partitions disabled. But let's investigate that at a later time. Thierry
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