From: Wolfram Sang <wsa@the-dreams.de>
To: Hans de Goede <hdegoede@redhat.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Jarkko Nikula <jarkko.nikula@linux.intel.com>,
linux-i2c@vger.kernel.org
Subject: Re: [PATCH] i2c: designware: Round down ACPI provided clk to nearest supported clk
Date: Tue, 29 Aug 2017 22:18:26 +0200 [thread overview]
Message-ID: <20170829201826.htdia6olxs3j5k66@ninjato> (raw)
In-Reply-To: <078c7214-230e-2a68-734b-2a01003ee378@redhat.com>
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Hi,
> > I dunno what standard says if we may or may not use 100 kHz as a last
> > resort even for speeds defined less than 100 kHz.
>
> The < 100000 case is for when i2c_acpi_find_bus_speed() returns 0, so
> that we then keep it 0, in which case the code a bit lower will pick
> a default.
This is fine by me.
> Since speeds < 100000 are clearly not valid treating them
Here I wonder: Not valid because of ACPI specs? Because I2C specs surely
allow speeds < 100kHz.
> as ACPI not providing any bus-speed info seems sensible to me.
Regards,
Wolfram
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next prev parent reply other threads:[~2017-08-29 20:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-29 12:08 [PATCH] i2c: designware: Round down ACPI provided clk to nearest supported clk Hans de Goede
2017-08-29 12:22 ` Andy Shevchenko
2017-08-29 12:52 ` Hans de Goede
2017-08-29 14:12 ` Jarkko Nikula
2017-08-29 20:18 ` Wolfram Sang [this message]
2017-08-29 20:27 ` Hans de Goede
2017-08-29 21:00 ` Wolfram Sang
2017-08-30 1:23 ` Phil Reid
2017-08-30 7:37 ` Jarkko Nikula
2017-08-31 18:29 ` Wolfram Sang
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