Linux-Watchdog Archive on lore.kernel.org
 help / color / Atom feed
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	Jens Axboe <axboe@kernel.dk>, Rob Herring <robh+dt@kernel.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
	"David S. Miller" <davem@davemloft.net>,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	linux-ide@vger.kernel.org,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	Linux I2C <linux-i2c@vger.kernel.org>,
	Linux MMC List <linux-mmc@vger.kernel.org>,
	netdev <netdev@vger.kernel.org>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	Linux Watchdog Mailing List <linux-watchdog@vger.kernel.org>
Subject: Re: [PATCH 03/17] ARM: dts: r8a7742: Add I2C and IIC support
Date: Fri, 22 May 2020 22:17:27 +0200
Message-ID: <20200522201727.GA21376@ninjato> (raw)
In-Reply-To: <CA+V-a8tVx6D8Vh=rYD2=Z-14GAW0puo009FtjYM++sw8PAtJug@mail.gmail.com>


[-- Attachment #1: Type: text/plain, Size: 1215 bytes --]


> > According to the Hardware User's Manual Rev. 1.00, the registers do exist
> > on all RZ/G1, except for RZ/G1E (see below).
> >
> >    "(automatic transmission can be used as a hardware function, but this is
> >     not meaningful for actual use cases)."
> >
> > (whatever that comment may mean?)

Strange comment, in deed. Given the paragraph before, I would guess Gen1
maybe had a "fitting" PMIC where SoC/PMIC handled DVFS kind of magically
with this automatic transfer feature? And Gen2 has not.

> > On R-Car E3 and RZ/G2E, which have a single IIC instance, we
> > handled that by:
> >
> >         The r8a77990 (R-Car E3) and r8a774c0 (RZ/G2E)
> >         controllers are not considered compatible with
> >         "renesas,rcar-gen3-iic" or "renesas,rmobile-iic"
> >         due to the absence of automatic transmission registers.

From a "describe the HW" point of view, this still makes sense to me.
Although, it is unlikely we will add support for the automatic
transmission feature (maybe famous last words).

> > On R-Car E2 and RZ/G1E, we forgot, and used both SoC-specific and
> > family-specific compatible values.

Okay, but we can fix DTs when they have bugs, or?


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

  reply index

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-15 15:08 [PATCH 00/17] RZ/G1H describe I2C, IIC, MMC0, SATA, AVB, RWDT and APMU nodes Lad Prabhakar
2020-05-15 15:08 ` [PATCH 01/17] dt-bindings: i2c: renesas,i2c: Document r8a7742 support Lad Prabhakar
2020-05-15 17:12   ` Wolfram Sang
2020-05-18  9:56   ` Geert Uytterhoeven
2020-05-28 20:03   ` Rob Herring
2020-05-15 15:08 ` [PATCH 02/17] dt-bindings: i2c: renesas,iic: " Lad Prabhakar
2020-05-15 17:14   ` Wolfram Sang
2020-05-18  9:59   ` Geert Uytterhoeven
2020-05-28 20:03   ` Rob Herring
2020-05-15 15:08 ` [PATCH 03/17] ARM: dts: r8a7742: Add I2C and IIC support Lad Prabhakar
2020-05-15 17:10   ` Wolfram Sang
2020-05-18  8:58     ` Lad, Prabhakar
2020-05-18  9:26       ` Wolfram Sang
2020-05-18  9:43         ` Lad, Prabhakar
2020-05-18  9:53           ` Wolfram Sang
2020-05-18 10:10         ` Geert Uytterhoeven
2020-05-22 19:14           ` Lad, Prabhakar
2020-05-22 20:17             ` Wolfram Sang [this message]
2020-05-25  8:23               ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 04/17] dt-bindings: mmc: renesas,sdhi: Document r8a7742 support Lad Prabhakar
2020-05-15 17:17   ` Wolfram Sang
2020-05-18 11:10   ` Geert Uytterhoeven
2020-05-19 15:29   ` Ulf Hansson
2020-05-15 15:08 ` [PATCH 05/17] mmc: renesas_sdhi_sys_dmac: Add support for r8a7742 SoC Lad Prabhakar
2020-05-15 17:17   ` Wolfram Sang
2020-05-18 11:24     ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 06/17] ARM: dts: r8a7742: Add SDHI nodes Lad Prabhakar
2020-05-17 20:53   ` Wolfram Sang
2020-05-18 11:51   ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 07/17] ARM: dts: r8a7742: Add MMC0 node Lad Prabhakar
2020-05-17 20:54   ` Wolfram Sang
2020-05-18 11:52   ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 08/17] dt-bindings: ata: renesas,rcar-sata: Add r8a7742 support Lad Prabhakar
2020-05-17 20:55   ` Wolfram Sang
2020-05-18 11:13   ` Geert Uytterhoeven
2020-05-28 20:04   ` Rob Herring
2020-05-15 15:08 ` [PATCH 09/17] ARM: dts: r8a7742: Add sata nodes Lad Prabhakar
2020-05-17 20:57   ` Wolfram Sang
2020-05-18 11:52   ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 10/17] dt-bindings: net: renesas,ravb: Add support for r8a7742 SoC Lad Prabhakar
2020-05-17 20:58   ` Wolfram Sang
2020-05-18 11:14   ` Geert Uytterhoeven
2020-05-28 20:04   ` Rob Herring
2020-05-15 15:08 ` [PATCH 11/17] dt-bindings: net: renesas,ether: Document R8A7742 SoC Lad Prabhakar
2020-05-17 20:59   ` Wolfram Sang
2020-05-18 11:15   ` Geert Uytterhoeven
2020-05-28 20:04   ` Rob Herring
2020-05-15 15:08 ` [PATCH 12/17] ARM: dts: r8a7742: Add Ethernet AVB support Lad Prabhakar
2020-05-17 21:00   ` Wolfram Sang
2020-05-18 11:53   ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 13/17] ARM: dts: r8a7742: Add Ether support Lad Prabhakar
2020-05-17 21:01   ` Wolfram Sang
2020-05-18 11:53   ` Geert Uytterhoeven
2020-05-15 15:08 ` [PATCH 14/17] dt-bindings: power: renesas,apmu: Document r8a7742 support Lad Prabhakar
2020-05-17 21:01   ` Wolfram Sang
2020-05-18 11:16   ` Geert Uytterhoeven
2020-05-28 20:05   ` Rob Herring
2020-05-15 15:08 ` [PATCH 15/17] ARM: dts: r8a7742: Add APMU nodes Lad Prabhakar
2020-05-17 21:03   ` Wolfram Sang
2020-05-15 15:08 ` [PATCH 16/17] dt-bindings: watchdog: renesas,wdt: Document r8a7742 support Lad Prabhakar
2020-05-17 21:03   ` Wolfram Sang
2020-05-18 11:17   ` Geert Uytterhoeven
2020-05-22 14:47   ` Guenter Roeck
2020-05-27  1:31   ` Rob Herring
2020-05-27 11:22     ` Lad, Prabhakar
2020-05-27 14:38       ` Rob Herring
2020-05-27 16:33         ` Prabhakar Mahadev Lad
2020-05-15 15:08 ` [PATCH 17/17] ARM: dts: r8a7742: Add RWDT node Lad Prabhakar
2020-05-17 21:08   ` Wolfram Sang
2020-05-18  9:16     ` Lad, Prabhakar
2020-05-18  9:28       ` Wolfram Sang
2020-05-18 11:47   ` Geert Uytterhoeven
2020-05-18 12:27     ` Lad, Prabhakar
2020-05-18 13:17       ` Sergei Shtylyov
2020-05-18 13:23         ` Lad, Prabhakar
2020-05-18 15:45           ` Geert Uytterhoeven

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200522201727.GA21376@ninjato \
    --to=wsa+renesas@sang-engineering.com \
    --cc=axboe@kernel.dk \
    --cc=davem@davemloft.net \
    --cc=devicetree@vger.kernel.org \
    --cc=geert@linux-m68k.org \
    --cc=linux-i2c@vger.kernel.org \
    --cc=linux-ide@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=linux-renesas-soc@vger.kernel.org \
    --cc=linux-watchdog@vger.kernel.org \
    --cc=linux@roeck-us.net \
    --cc=netdev@vger.kernel.org \
    --cc=prabhakar.csengg@gmail.com \
    --cc=prabhakar.mahadev-lad.rj@bp.renesas.com \
    --cc=robh+dt@kernel.org \
    --cc=sergei.shtylyov@cogentembedded.com \
    --cc=ulf.hansson@linaro.org \
    --cc=wim@linux-watchdog.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Watchdog Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-watchdog/0 linux-watchdog/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-watchdog linux-watchdog/ https://lore.kernel.org/linux-watchdog \
		linux-watchdog@vger.kernel.org
	public-inbox-index linux-watchdog

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-watchdog


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git