netdev - Re: [PATCH v4 3/9] nvmem: core: add nvmem_device

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Date:   Wed, 14 Aug 2019 13:46:16 +0200
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Evgeniy Polyakov <zbr@...emap.net>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        netdev@...r.kernel.org, linux-rtc@...r.kernel.org,
        linux-serial@...r.kernel.org
Subject: Re: [PATCH v4 3/9] nvmem: core: add nvmem_device_find

On Tue, 13 Aug 2019 10:40:34 +0100
Srinivas Kandagatla <srinivas.kandagatla@...aro.org> wrote:

> 
> 
> On 09/08/2019 11:32, Thomas Bogendoerfer wrote:
> > nvmem_device_find provides a way to search for nvmem devices with
> > the help of a match function simlair to bus_find_device.
> > 
> > Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
> > ---
> >   drivers/nvmem/core.c           | 62 ++++++++++++++++++++++--------------------
> >   include/linux/nvmem-consumer.h |  9 ++++++
> >   2 files changed, 41 insertions(+), 30 deletions(-)
> 
> Have you considered using nvmem_register_notifier() ?

yes, that was the first idea. But then I realized I need to build up
a private database of information already present in nvmem bus. So I
looked for a way to retrieve it from there. Unfortunately I couldn't
use bus_find_device directly, because nvmem_bus_type and struct nvmem_device
is hidden. So I refactured the lookup code and added a more universal
lookup function, which fits my needs and should be usable for more.

Thomas.

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