From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Herve Codina <herve.codina@bootlin.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Magnus Damm <magnus.damm@gmail.com>,
Gareth Williams <gareth.williams.jx@renesas.com>,
linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: [PATCH v2 2/7] dt-bindings: clock: renesas,r9a06g032-sysctrl: Add h2mode property
Date: Tue, 22 Nov 2022 08:45:19 +0100 [thread overview]
Message-ID: <1f12883b-1e37-7f2b-f9e9-c8bad290a133@linaro.org> (raw)
In-Reply-To: <CAMuHMdXzqZB4sKMmroriq5oPp7z=yXiHk=+eQKwSyPhNbYqgYA@mail.gmail.com>
On 21/11/2022 21:46, Geert Uytterhoeven wrote:
>> This does not change anything. Herve wrote:
>>
>>> probe some devices (USB host and probably others)
>>
>> Why some can be probed earlier and some not, if there are no
>> dependencies? If there are dependencies, it's the same case with sysctrl
>> touching the register bit and the USB controller touching it (as well
>> via syscon, but that's obvious, I assume).
>>
>> Where is the synchronization problem?
>
> The h2mode bit (and probably a few other controls we haven't figured out
> yet) in the sysctrl must be set before any of the USB devices is active.
> Hence it's safest for the sysctrl to do this before any of the USB drivers
> probes.
Again, this does not differ from many, many of other devices. All of
them must set something in system controller block, before they start
operating (or at specific time). It's exactly the same everywhere.
Best regards,
Krzysztof
next prev parent reply other threads:[~2022-11-22 7:45 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-14 11:15 [PATCH v2 0/7] Add the Renesas USBF controller support Herve Codina
2022-11-14 11:15 ` [PATCH v2 1/7] soc: renesas: r9a06g032-sysctrl: Export function to get the usb role Herve Codina
2022-11-14 13:33 ` Geert Uytterhoeven
2022-11-14 11:15 ` [PATCH v2 2/7] dt-bindings: clock: renesas,r9a06g032-sysctrl: Add h2mode property Herve Codina
2022-11-14 13:33 ` Geert Uytterhoeven
2022-11-15 13:05 ` Krzysztof Kozlowski
2022-11-15 13:07 ` Krzysztof Kozlowski
2022-11-15 14:04 ` Herve Codina
2022-11-18 10:23 ` Herve Codina
2022-11-21 11:43 ` Krzysztof Kozlowski
2022-11-21 15:59 ` Herve Codina
2022-11-21 16:33 ` Krzysztof Kozlowski
2022-11-21 16:36 ` Geert Uytterhoeven
2022-11-21 17:11 ` Krzysztof Kozlowski
2022-11-21 20:46 ` Geert Uytterhoeven
2022-11-22 7:45 ` Krzysztof Kozlowski [this message]
2022-11-22 8:25 ` Geert Uytterhoeven
2022-11-22 8:42 ` Krzysztof Kozlowski
2022-11-22 9:01 ` Geert Uytterhoeven
2022-11-22 10:23 ` Krzysztof Kozlowski
2022-11-22 10:26 ` Geert Uytterhoeven
2022-11-22 10:34 ` Krzysztof Kozlowski
2022-11-22 9:07 ` Herve Codina
2022-11-22 10:30 ` Krzysztof Kozlowski
2022-11-22 10:47 ` Geert Uytterhoeven
2022-11-23 9:39 ` Krzysztof Kozlowski
2022-11-24 9:36 ` Miquel Raynal
2022-11-24 9:46 ` Krzysztof Kozlowski
2022-11-24 10:27 ` Miquel Raynal
2022-11-24 10:44 ` Miquel Raynal
2022-11-14 11:15 ` [PATCH v2 3/7] soc: renesas: r9a06g032-sysctrl: Handle h2mode device-tree property Herve Codina
2022-11-14 13:32 ` Geert Uytterhoeven
2022-11-14 11:15 ` [PATCH v2 4/7] dt-bindings: usb: add the Renesas RZ/N1 USBF controller binding Herve Codina
2022-11-15 13:13 ` Krzysztof Kozlowski
2022-11-15 13:29 ` Herve Codina
2022-11-14 11:15 ` [PATCH v2 5/7] usb: gadget: udc: add Renesas RZ/N1 USBF controller support Herve Codina
2022-11-14 11:15 ` [PATCH v2 6/7] ARM: dts: r9a06g032: Add the USBF controller node Herve Codina
2022-11-15 13:16 ` Krzysztof Kozlowski
2022-11-15 13:27 ` Herve Codina
2022-11-15 15:09 ` Herve Codina
2022-11-15 16:30 ` Krzysztof Kozlowski
2022-11-15 14:11 ` Geert Uytterhoeven
2022-11-15 14:58 ` Krzysztof Kozlowski
2022-11-16 8:51 ` Geert Uytterhoeven
2022-11-14 11:15 ` [PATCH v2 7/7] MAINTAINERS: add the Renesas RZ/N1 USBF controller entry Herve Codina
2022-11-15 12:20 ` kernel test robot
2022-11-15 13:24 ` Herve Codina
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