From: wsa@the-dreams.de (Wolfram Sang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] i2c-rk3x: move setup to the earlier subsys initcall
Date: Mon, 22 Sep 2014 19:13:27 +0200 [thread overview]
Message-ID: <20140922171325.GB1404@katana> (raw)
In-Reply-To: <CAD=FV=VUoK8SDng6O4-VVq8UZf88b3bSe-hQMht3R2nmYXqMFQ@mail.gmail.com>
Hi,
> In general you are correct. You can get by with lots of probe
> deferrals. I don't personally know of any case where things are
> broken with the current code, but it's really nice to avoid the
> deferrals if possible.
Yes, we all want proper dependencies and ordering, yet deferred probing
is the best we have.
> Given that this is a core SoC i2c bus and is used for _a lot_ of
> external connectivity (including for connecting to the primary
> regulator on most boards), bumping up the priority in the init order
> makes a lot of sense to me.
>
> This also matches the i2c busses of most other major SoCs. A selected
> few examples:
>
> i2c-gpio.c:subsys_initcall(i2c_gpio_init);
> i2c-omap.c:subsys_initcall(omap_i2c_init_driver);
> i2c-s3c2410.c:subsys_initcall(i2c_adap_s3c_init);
> i2c-tegra.c:subsys_initcall(tegra_i2c_init_driver);
They were "lucky" to be around before deferred probing and using
subsys_initcall was always considered a hack. I am not accepting new
users of this hack unless there is really no other solution.
So, NACK, since it doesn't solve a problem.
Regards,
Wolfram
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prev parent reply other threads:[~2014-09-22 17:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-22 7:24 [PATCH] i2c-rk3x: move setup to the earlier subsys initcall Chris Zhong
2014-09-22 16:05 ` Max Schwarz
2014-09-22 16:20 ` Max Schwarz
2014-09-22 16:22 ` Doug Anderson
2014-09-22 17:13 ` Wolfram Sang [this message]
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