Re: [PATCH v3 1/2] w1: add 1-wire master driver for IP block found in SGI ASICs
From: Thomas Bogendoerfer
Date: Wed Sep 04 2019 - 08:01:37 EST
On Wed, 4 Sep 2019 13:48:37 +0200
Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> On Sat, Aug 31, 2019 at 10:26:21AM +0200, Thomas Bogendoerfer wrote:
> > Starting with SGI Origin machines nearly every new SGI ASIC contains
> > an 1-Wire master. They are used for attaching One-Wire prom devices,
> > which contain information about part numbers, revision numbers,
> > serial number etc. and MAC addresses for ethernet interfaces.
> > This patch adds a master driver to support this IP block.
> > It also adds an extra field dev_id to struct w1_bus_master, which
> > could be in used in slave drivers for creating unique device names.
> > Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@xxxxxxx>
> > ---
> > drivers/w1/masters/Kconfig | 9 +++
> > drivers/w1/masters/Makefile | 1 +
> > drivers/w1/masters/sgi_w1.c | 130 +++++++++++++++++++++++++++++++++++
> > include/linux/platform_data/sgi-w1.h | 13 ++++
> Why platform data? I thought that was the "old way", and the "proper
> way" now is to use device tree?
this machine is old and doesn't have device tree at all.
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