linux-kernel - Re: [PATCH v3 0/2] remoteproc: Add sysfs interface

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Date:   Mon, 31 Oct 2016 17:31:35 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Matt Redfearn <matt.redfearn@...tec.com>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/2] remoteproc: Add sysfs interface

On Thu 27 Oct 07:10 PDT 2016, Matt Redfearn wrote:

> 
> On 19/10/16 13:05, Matt Redfearn wrote:
> >It is often desireable to boot a remote processor with different
> >firmware files, depending on the needs of the system at a particular
> >time. This series adds a sysfs interface to the remoteproc core,
> >exposing interfaces to manipulate the remote processor. One interface is
> >the "state" file which performs the same function as the one in debugfs
> >(which is removed later in the series). The other is a "firmware" file
> >which allows retrieval of the name of the running firmware, and allows a
> >new firmware to be loaded when written, as long as the remote processor
> >is currently stopped.
> >
> >Some groundwork must be laid first, changing the storage mechanism of
> >the firmware name such that it can be rewritten easily, then that is
> >wired up to the new sysfs interface.
> >
> >This series is based on v4.9-rc1
> >
> >
> >Changes in v3:
> >Drop call to rproc_add_virtio_devices from sysfs firmware_store
> >Use strcspn to find firmware name length
> >Explicit indexes for state strings
> >
> >Changes in v2:
> >Have firmware_store perform the necessary steps inline.
> >Use sysfs_streq when dealing with writes to sysfs files
> >
> >Matt Redfearn (2):
> >   remoteproc: Add a sysfs interface for firmware and state
> >   remoteproc: debugfs: Remove state entry which is duplicated is sysfs
> >
> >  Documentation/ABI/testing/sysfs-class-remoteproc |  50 ++++++++
> >  drivers/remoteproc/Makefile                      |   1 +
> >  drivers/remoteproc/remoteproc_core.c             |   3 +
> >  drivers/remoteproc/remoteproc_debugfs.c          |  71 -----------
> >  drivers/remoteproc/remoteproc_internal.h         |   5 +
> >  drivers/remoteproc/remoteproc_sysfs.c            | 151 +++++++++++++++++++++++
> >  6 files changed, 210 insertions(+), 71 deletions(-)
> >  create mode 100644 Documentation/ABI/testing/sysfs-class-remoteproc
> >  create mode 100644 drivers/remoteproc/remoteproc_sysfs.c
> >
> 
> Hi Bjorn,
> 
> Is this version of the patchset ok? Any feedback welcome :-)
> 

Hi Matt,

I was hoping for some comments or verification from others, so I
conveniently did let it hang out in my TODO list.

I think the new interface looks good and have merged the two patches!

Regards,
Bjorn