From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Paolo Pisati <p.pisati@gmail.com>
Cc: Andy Gross <andy.gross@linaro.org>,
Rajendra Nayak <rnayak@codeaurora.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 0/5] dts patches for qcom tsens support
Date: Wed, 24 Aug 2016 20:13:28 -0700 [thread overview]
Message-ID: <20160825031328.GI15161@tuxbot> (raw)
In-Reply-To: <20160824102256.GA14048@harukaze>
On Wed 24 Aug 03:22 PDT 2016, Paolo Pisati wrote:
> On Wed, Aug 17, 2016 at 02:33:40PM -0500, Andy Gross wrote:
> > On Wed, Aug 17, 2016 at 10:48:43AM +0530, Rajendra Nayak wrote:
> > > Hey Andy,
> > >
> > > This is a respin of v2 with some minor fixes pointed out by Rob.
> > > Please pull these in for 4.9
> > >
> > > Thanks,
> > > Rajendra
> >
> > I pulled these in.
>
> Did you try to read the content of the qfprom from userspace?
>
> $ uname -a
> Linux dragon410c 4.8.0-rc1+ #6 SMP PREEMPT Wed Aug 24 11:11:02 CEST 2016 aarch64
> aarch64 aarch64 GNU/Linux
> $ lsmod
> Module Size Used by
> nvmem_qfprom 16384 0
> nvmem_core 24576 1 nvmem_qfprom
> $ ls -la /sys/bus/nvmem/devices/
> total 0
> drwxr-xr-x 2 root root 0 Aug 24 10:17 .
> drwxr-xr-x 4 root root 0 Aug 24 10:15 ..
> lrwxrwxrwx 1 root root 0 Aug 24 10:17 qfprom0 ->
> ../../../devices/platform/soc/5c000.qfprom/qfprom0
> $ cat /sys/bus/nvmem/devices/qfprom0/nvmem
>
> [spontaneous reboot]
>
> This using agross's for-next tree as of today ("54ba896 Merge branch
> 'arm64-defconfig-for-4.9' into all-for-4.8") and defconfig.
This was reported in some other forum as well, after some investigation
we concluded that it looks like one of the entries are locked down -
probably from some security reason.
I'm not aware of any way to query this configuration. But the main use
case for the qfprom is in-kernel access to certain elements and that we
do get from the driver as is...
Regards,
Bjorn
next prev parent reply other threads:[~2016-08-25 4:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-17 5:18 [PATCH v3 0/5] dts patches for qcom tsens support Rajendra Nayak
2016-08-17 5:18 ` [PATCH v3 1/5] arm: dts: msm8974: Add thermal zones, tsens and qfprom nodes Rajendra Nayak
2016-08-17 5:18 ` [PATCH v3 2/5] arm: dts: apq8064: " Rajendra Nayak
2016-08-17 5:18 ` [PATCH v3 3/5] arm: dts: apq8084: " Rajendra Nayak
2016-08-17 5:18 ` [PATCH v3 4/5] arm64: dts: msm8916: " Rajendra Nayak
2016-08-17 5:18 ` [PATCH v3 5/5] arm64: dts: msm8996: " Rajendra Nayak
2016-08-17 19:33 ` [PATCH v3 0/5] dts patches for qcom tsens support Andy Gross
[not found] ` <20160817193340.GA18215-3KkwrOJo9xYlRp7syxWybdHuzzzSOjJt@public.gmane.org>
2016-08-24 10:22 ` Paolo Pisati
2016-08-24 10:22 ` Paolo Pisati
2016-08-24 12:18 ` Nayak, Rajendra
2016-08-24 12:18 ` Nayak, Rajendra
[not found] ` <57BD90A3.3000106-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-08-24 22:03 ` Andy Gross
2016-08-24 22:03 ` Andy Gross
2016-08-25 3:13 ` Bjorn Andersson [this message]
2016-08-25 3:21 ` Andy Gross
2016-08-25 12:21 ` Paolo Pisati
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