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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: "Linux I2C" <linux-i2c@vger.kernel.org>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	linux-i3c@lists.infradead.org,
	"Kieran Bingham" <kieran@ksquared.org.uk>,
	"Niklas Söderlund" <niklas.soderlund@ragnatech.se>,
	"Luca Ceresoli" <luca@lucaceresoli.net>,
	"Jacopo Mondi" <jacopo@jmondi.org>,
	"Laurent Pinchart" <laurent.pinchart@ideasonboard.com>,
	"Vladimir Zapolskiy" <vz@mleia.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>
Subject: Re: [RFC PATCH 0/7] i2c: of: reserve unknown and ancillary addresses
Date: Fri, 21 Feb 2020 11:15:04 +0100	[thread overview]
Message-ID: <CAMuHMdX+SJPTvDqKDwD_3DaAxDT3KcEbcjLNjj4JsbcpRwd92w@mail.gmail.com> (raw)
In-Reply-To: <20200220172403.26062-1-wsa+renesas@sang-engineering.com>

Hi Wolfram,

On Thu, Feb 20, 2020 at 6:26 PM Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> One outcome of my dynamic address assignment RFC series[1] was that we
> need a way to describe an I2C bus in DT fully. This includes unknown
> devices and devices requiring multiple addresses. This series implements
> that.
>
> Patches 1+2 do some preparational refactoring. After patch 3, we can
> have child nodes with an address, but no compatible. Those addresses
> will be marked busy now. They are handled by the dummy driver as well,
> but named "reserved" instead of dummy. Patches 4+5 are again some
> preparational refactoring. After patch 6, all addresses in a 'reg' array
> are now blocked by the I2C core, also using the dummy driver but named
> "reserved". So, we can have something like this:
>
>         dummy@13 {

Hence should that be "reserved@13"?

>                reg = <0x13>, <0x14>;
>         };

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>,
	"Kieran Bingham" <kieran@ksquared.org.uk>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Jacopo Mondi" <jacopo@jmondi.org>,
	"Vladimir Zapolskiy" <vz@mleia.com>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	"Luca Ceresoli" <luca@lucaceresoli.net>,
	"Linux I2C" <linux-i2c@vger.kernel.org>,
	"Niklas Söderlund" <niklas.soderlund@ragnatech.se>,
	linux-i3c@lists.infradead.org,
	"Laurent Pinchart" <laurent.pinchart@ideasonboard.com>
Subject: Re: [RFC PATCH 0/7] i2c: of: reserve unknown and ancillary addresses
Date: Fri, 21 Feb 2020 11:15:04 +0100	[thread overview]
Message-ID: <CAMuHMdX+SJPTvDqKDwD_3DaAxDT3KcEbcjLNjj4JsbcpRwd92w@mail.gmail.com> (raw)
In-Reply-To: <20200220172403.26062-1-wsa+renesas@sang-engineering.com>

Hi Wolfram,

On Thu, Feb 20, 2020 at 6:26 PM Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> One outcome of my dynamic address assignment RFC series[1] was that we
> need a way to describe an I2C bus in DT fully. This includes unknown
> devices and devices requiring multiple addresses. This series implements
> that.
>
> Patches 1+2 do some preparational refactoring. After patch 3, we can
> have child nodes with an address, but no compatible. Those addresses
> will be marked busy now. They are handled by the dummy driver as well,
> but named "reserved" instead of dummy. Patches 4+5 are again some
> preparational refactoring. After patch 6, all addresses in a 'reg' array
> are now blocked by the I2C core, also using the dummy driver but named
> "reserved". So, we can have something like this:
>
>         dummy@13 {

Hence should that be "reserved@13"?

>                reg = <0x13>, <0x14>;
>         };

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c

  parent reply	other threads:[~2020-02-21 10:15 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-20 17:23 [RFC PATCH 0/7] i2c: of: reserve unknown and ancillary addresses Wolfram Sang
2020-02-20 17:23 ` Wolfram Sang
2020-02-20 17:23 ` [RFC PATCH 1/7] i2c: add sanity check for parameter of i2c_verify_client() Wolfram Sang
2020-02-20 17:23   ` Wolfram Sang
2020-02-21  9:36   ` Geert Uytterhoeven
2020-02-21  9:36     ` Geert Uytterhoeven
2020-02-20 17:23 ` [RFC PATCH 2/7] i2c: use DEFINE for the dummy driver name Wolfram Sang
2020-02-20 17:23   ` Wolfram Sang
2020-02-21  9:38   ` Geert Uytterhoeven
2020-02-21  9:38     ` Geert Uytterhoeven
2020-02-20 17:23 ` [RFC PATCH 3/7] i2c: allow DT nodes without 'compatible' Wolfram Sang
2020-02-20 17:23   ` Wolfram Sang
2020-02-20 17:23   ` Wolfram Sang
2020-02-21  9:45   ` Geert Uytterhoeven
2020-02-21  9:45     ` Geert Uytterhoeven
2020-02-21  9:45     ` Geert Uytterhoeven
2020-02-21  9:48     ` Geert Uytterhoeven
2020-02-21  9:48       ` Geert Uytterhoeven
2020-02-21  9:48       ` Geert Uytterhoeven
2020-02-23 23:11     ` Luca Ceresoli
2020-02-23 23:11       ` Luca Ceresoli
2020-03-12 11:19       ` Wolfram Sang
2020-03-12 11:19         ` Wolfram Sang
2020-03-12 11:44         ` Alexandre Belloni
2020-03-12 11:44           ` Alexandre Belloni
2020-03-12 11:44           ` Alexandre Belloni
2020-04-10 13:47         ` Luca Ceresoli
2020-04-10 13:47           ` Luca Ceresoli
2020-02-26 16:30   ` Rob Herring
2020-02-26 16:30     ` Rob Herring
2020-02-26 16:30     ` Rob Herring
2020-02-20 17:24 ` [RFC PATCH 4/7] i2c: of: remove superfluous parameter from exported function Wolfram Sang
2020-02-20 17:24   ` Wolfram Sang
2020-02-21  9:50   ` Geert Uytterhoeven
2020-02-21  9:50     ` Geert Uytterhoeven
2020-02-21  9:50     ` Geert Uytterhoeven
2020-02-24  8:12   ` Luca Ceresoli
2020-02-24  8:12     ` Luca Ceresoli
2020-02-20 17:24 ` [RFC PATCH 5/7] i2c: of: error message unification Wolfram Sang
2020-02-20 17:24   ` Wolfram Sang
2020-02-21  9:54   ` Geert Uytterhoeven
2020-02-21  9:54     ` Geert Uytterhoeven
2020-02-20 17:24 ` [RFC PATCH 6/7] i2c: of: mark a whole array of regs as reserved Wolfram Sang
2020-02-20 17:24   ` Wolfram Sang
2020-02-21 10:09   ` Geert Uytterhoeven
2020-02-21 10:09     ` Geert Uytterhoeven
2020-03-12 11:21     ` Wolfram Sang
2020-03-12 11:21       ` Wolfram Sang
2020-03-18 14:33     ` Wolfram Sang
2020-03-18 14:33       ` Wolfram Sang
2020-02-28 12:11   ` Luca Ceresoli
2020-02-28 12:11     ` Luca Ceresoli
2020-02-20 17:24 ` [RFC PATCH 7/7] i2c: core: hand over reserved devices when requesting ancillary addresses Wolfram Sang
2020-02-20 17:24   ` Wolfram Sang
2020-02-21 10:13   ` Geert Uytterhoeven
2020-02-21 10:13     ` Geert Uytterhoeven
2020-02-21 10:13     ` Geert Uytterhoeven
2020-02-28 12:11     ` Luca Ceresoli
2020-02-28 12:11       ` Luca Ceresoli
2020-03-12 11:30       ` Wolfram Sang
2020-03-12 11:30         ` Wolfram Sang
2020-03-12 11:21     ` Wolfram Sang
2020-03-12 11:21       ` Wolfram Sang
2020-03-13 12:42     ` Wolfram Sang
2020-03-13 12:42       ` Wolfram Sang
2020-02-21 10:15 ` Geert Uytterhoeven [this message]
2020-02-21 10:15   ` [RFC PATCH 0/7] i2c: of: reserve unknown and " Geert Uytterhoeven

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