linux-kernel - Re: [PATCH] clk: tegra: mark TEGRA210_CLK

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 13 Mar 2017 12:45:32 +0200
From:   Peter De Schrijver <pdeschrijver@...dia.com>
To:     Jon Hunter <jonathanh@...dia.com>
CC:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        Michael Turquette <mturquette@...libre.com>,
        "Stephen Boyd" <sboyd@...eaurora.org>,
        Stephen Warren <swarren@...dotorg.org>,
        "Thierry Reding" <thierry.reding@...il.com>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-clk <linux-clk@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: tegra: mark TEGRA210_CLK_DBGAPB as always on

On Wed, Mar 08, 2017 at 11:48:21AM +0000, Jon Hunter wrote:
> 
> On 08/03/17 11:38, Geert Uytterhoeven wrote:
> > Hi Jon,
> > 
> > On Wed, Mar 8, 2017 at 11:13 AM, Jon Hunter <jonathanh@...dia.com> wrote:
> >>> I had a similar issue with SH-Mobile AG5, where the power domain containing
> >>> the JTAG interface is powered down.
> >>
> >> This reminds me, does your patch assume that the DFD power domain is
> >> enabled? I am guessing that it needs to be for JTAG to work.
> > 
> > Yes. The pm-rmobile driver looks for "arm,coresight-etm3x" devices, and
> > marks the corresponding PM Domain as always-on, as long as the
> > Coresight code doesn't handle runtime PM.
> 
> Sorry Geert, but I was asking Peter specifically about the power-domain
> on Tegra as I have a feeling we may have the same scenario ;-)

We don't have a specific power domain for DFD on Tegra210. It's part of the
non-powergateable core domain.

Cheers,

Peter.