Re: [PATCH 0/4] soc/tegra: Turn on XUSB partitions

Thierry Reding
2016-06-30T13:24:18Z

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On Thu, Jun 30, 2016 at 11:56:23AM +0100, Jon Hunter wrote:
> The Tegra XHCI driver currently assumes the XUSB power partitions have
> been enabled by the bootloader. This is not for the Tegra210 Smaug board
> and so cause the kernel to hang when enabling XHCI support. Although the
> XHCI driver itself needs to manage these partitions, for now enable the
> partitions if the XHCI driver is enabled.
>
> In order to do this I have made a fundamental change to the PMC driver
> to initialise the power partitions during early init. A benefit of this
> is that if CONFIG_PM_GENERIC_DOMAINS is not enabled, then we can simply
> turn on the partitions early before any devices are probed.
>
> This is based upon the PMC fixes series [0].
>
> Changes from initial RFC:
> - Added patch to add more detailed error messages when initialising
> powergates.
>
> [0] http://marc.info/?l=linux-tegra&m=146711078013182&w=2
>
> Jon Hunter (4):
> soc/tegra: pmc: Add specific error messages for initialising a
> powergate
> soc/tegra: pmc: Initialise power partitions early
> soc/tegra: pmc: Enable XUSB partitions on boot
> arm64: tegra210: Add XUSB powergates
>
> arch/arm64/boot/dts/nvidia/tegra210.dtsi | 24 +++++++++++++
> drivers/soc/tegra/pmc.c | 60 +++++++++++++++++++++++---------
> 2 files changed, 67 insertions(+), 17 deletions(-)

Applied, thanks.

Thierry

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