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

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Date:	Thu, 30 Jun 2016 15:24:18 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] soc/tegra: Turn on XUSB partitions

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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