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From: "Andreas Färber" <afaerber@suse.de>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "Neil Armstrong" <narmstrong@baylibre.com>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Geert Uytterhoeven" <geert+renesas@glider.be>,
	linux-realtek-soc@lists.infradead.org,
	"Tony Lindgren" <tony@atomide.com>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Bjorn Andersson" <bjorn.andersson@linaro.org>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Lee Jones" <lee.jones@linaro.org>,
	"Rob Herring" <robh@kernel.org>,
	"Kevin Hilman" <khilman@baylibre.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	"Michal Simek" <michal.simek@xilinx.com>,
	"Jonathan Hunter" <jonathanh@nvidia.com>,
	"NXP Linux Team" <linux-imx@nxp.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	boot-architecture@lists.linaro.org,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Fabio Estevam" <festevam@gmail.com>,
	"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
	linux-amlogic@lists.infradead.org, linux-omap@vger.kernel.org,
	"Alexander Sverdlin" <alexander.sverdlin@gmail.com>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Hartley Sweeten" <hsweeten@visionengravers.com>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Shawn Guo" <shawnguo@kernel.org>
Subject: Re: Sense of soc bus? (was: [PATCH] base: soc: Export soc_device_to_device() helper)
Date: Fri, 15 Nov 2019 13:00:59 +0100
Message-ID: <a0a6d71f-4fb7-51ce-fe33-74f9e588b791@suse.de> (raw)
In-Reply-To: <CAMuHMdWOWWQoJh5=07VMRhtrFR_Gc_qNhjTV4tCsvwvMn0kYfA@mail.gmail.com>

Hi Geert,

Am 15.11.19 um 09:58 schrieb Geert Uytterhoeven:
> On Fri, Nov 15, 2019 at 9:52 AM Neil Armstrong <narmstrong@baylibre.com> wrote:
>> On 12/11/2019 11:47, Andreas Färber wrote:
>>> For example, RTD1295 will support LSADC only from revision B00
>>> on (and it's not the first time I'm seeing such things in the industry).
>>> So if a user complains, it will be helpful to see that information.
>>>
>>> Referencing your Amlogic review, with all due respect for its authors,
>>> the common framework here just lets that information evaporate into the
>>> deeps of sysfs.
>>
>> Hopefully we never had the case where needed to use the soc info in drivers,
>> but now we have one and having such infrastructure already in-place will help.
>>
>> Renesas platforms makes a extensive usage of the soc info infrastructure to
>> figure out plenty of HW parameters at runtime and lower their DT changes.
> 
> We do our best to use it solely for detecting quirks in early SoC revisions.

Got a pointer? I fail to immediately understand how sysfs would help
drivers (as opposed to userspace) detect quirks: Parsing strings back
doesn't sound efficient, and I don't see you exporting any custom APIs
in drivers/soc/renesas/renesas-soc.c?

Regards,
Andreas

-- 
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer
HRB 36809 (AG Nürnberg)

  reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-03  1:36 [RFC 00/11] ARM: Realtek RTD1195/RTD1295 SoC info Andreas Färber
2019-11-03  1:36 ` [RFC 01/11] dt-bindings: soc: Add Realtek RTD1195 chip info binding Andreas Färber
2019-11-06  4:41   ` Rob Herring
2019-11-03  1:36 ` [RFC 02/11] soc: Add Realtek chip info driver for RTD1195 and RTD1295 Andreas Färber
2019-11-03  1:45   ` Andreas Färber
2019-11-11  4:56   ` [PATCH] base: soc: Export soc_device_to_device() helper Andreas Färber
2019-11-11  5:27     ` Greg Kroah-Hartman
2019-11-11  5:42       ` Andreas Färber
2019-11-11  6:40         ` Greg Kroah-Hartman
2019-11-11 20:10           ` Andreas Färber
2019-11-12  0:29             ` Andreas Färber
2019-11-12  5:23             ` Greg Kroah-Hartman
2019-11-12  7:29               ` Uwe Kleine-König
2019-11-12 10:47                 ` Sense of soc bus? (was: [PATCH] base: soc: Export soc_device_to_device() helper) Andreas Färber
2019-11-14 22:09                   ` Rob Herring
2019-11-15 11:15                     ` Andreas Färber
2019-11-15 11:49                     ` Andreas Färber
2019-11-15  8:52                   ` Neil Armstrong
2019-11-15  8:58                     ` Geert Uytterhoeven
2019-11-15 12:00                       ` Andreas Färber [this message]
2019-11-15 12:34                         ` Geert Uytterhoeven
2019-11-18 15:55                           ` Tony Lindgren
2019-11-12 10:48                 ` [PATCH] base: soc: Export soc_device_to_device() helper Lee Jones
2019-11-03  1:36 ` [RFC 03/11] arm64: dts: realtek: rtd129x: Add chip info node Andreas Färber
2019-11-03  1:36 ` [RFC 04/11] ARM: dts: rtd1195: " Andreas Färber
2019-11-03  1:36 ` [RFC 05/11] dt-bindings: soc: realtek: rtd1195-chip: Extend reg property Andreas Färber
2019-11-06  4:46   ` Rob Herring
2019-11-06  8:42     ` Andreas Färber
2019-11-03  1:36 ` [RFC 06/11] soc: realtek: chip: Detect RTD1296 Andreas Färber
2019-11-03  1:36 ` [RFC 07/11] arm64: dts: realtek: rtd129x: Extend chip-info reg with CHIP_INFO1 Andreas Färber
2019-11-03  1:36 ` [RFC 08/11] soc: realtek: chip: Detect RTD1293 Andreas Färber
2019-11-03  1:36 ` [RFC 09/11] dt-bindings: soc: realtek: rtd1195-chip: Extend reg node again Andreas Färber
2019-11-03  1:36 ` [RFC 10/11] soc: realtek: chip: Detect RTD1294 Andreas Färber
2019-11-03  1:36 ` [RFC 11/11] arm64: dts: realtek: rtd129x: Extend chip-info reg with efuse Andreas Färber
2019-11-07  7:16 ` [RFC 00/11] ARM: Realtek RTD1195/RTD1295 SoC info Andreas Färber

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