From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>,
Simon Horman <horms@verge.net.au>,
Magnus Damm <magnus.damm@gmail.com>,
Linux I2C <linux-i2c@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Linux-sh list <linux-sh@vger.kernel.org>
Subject: Re: [PATCH 1/5] ARM: shmobile: kzm9g legacy: Set i2c clks_per_count to 2
Date: Fri, 7 Nov 2014 08:12:57 +0100 [thread overview]
Message-ID: <CAMuHMdVWS3HjsPj7T3JFxVuiRGSZmopkeDadpKH1YdmnAGYdNw@mail.gmail.com> (raw)
In-Reply-To: <20141107052420.GA1278@katana>
Hi Wolfram,
On Fri, Nov 7, 2014 at 6:24 AM, Wolfram Sang <wsa@the-dreams.de> wrote:
>> Note that the L/H values still differ from the Transfer Rate Settings
>> example in Table 19.3 of the datasheet, which suggests 0x121/0xe7.
>
> Is the formula different or is it rounding errors?
The formula is different. It doesn't use absolute tLOW, tHIGH, and tF
values, but only the duty cycle of the clock.
It's similar in the R-Car Gen2 docs. Except that on Gen2, there's no
mention of using a duty cycle of 5/3 for High Speed like on AG5.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2014-11-07 7:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-06 11:52 [PATCH 0/5] ARM: shmobile: sh73a0/r8a73a4: i2c-sh_mobile fixes Geert Uytterhoeven
[not found] ` <1415274730-310-1-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
2014-11-06 11:52 ` [PATCH 1/5] ARM: shmobile: kzm9g legacy: Set i2c clks_per_count to 2 Geert Uytterhoeven
[not found] ` <1415274730-310-2-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
2014-11-07 5:24 ` Wolfram Sang
2014-11-07 7:12 ` Geert Uytterhoeven [this message]
2014-11-10 1:02 ` Simon Horman
2014-11-12 1:44 ` Simon Horman
2014-11-12 8:53 ` Geert Uytterhoeven
2014-11-12 8:55 ` Geert Uytterhoeven
[not found] ` <CAMuHMdXoiX6CreDJNaDHcmsifX0C+TRRvTy4JWYBc2c-MVT_Qw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-12 9:05 ` Simon Horman
[not found] ` <CAMuHMdUUspG8-dYGiO7cmuECBLpfmQAYg=B8ZpajxRXhaEUJ2A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-12 9:04 ` Simon Horman
2014-11-06 11:52 ` [PATCH 2/5] i2c: sh_mobile: Add support for r8a73a4 and sh73a0 Geert Uytterhoeven
[not found] ` <1415274730-310-3-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
2014-11-07 17:53 ` Wolfram Sang
2014-11-06 11:52 ` [PATCH 3/5] i2c: sh_mobile: Document SoC-specific bindings Geert Uytterhoeven
[not found] ` <1415274730-310-4-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
2014-11-07 4:17 ` Simon Horman
2014-11-07 17:53 ` Wolfram Sang
2014-11-10 1:05 ` Simon Horman
2014-11-06 11:52 ` [PATCH 4/5] ARM: shmobile: sh73a0 dtsi: Add SoC-specific IIC compatible properties Geert Uytterhoeven
[not found] ` <1415274730-310-5-git-send-email-geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
2014-11-07 5:25 ` Wolfram Sang
2014-11-10 1:04 ` Simon Horman
2014-11-06 11:52 ` [PATCH 5/5] ARM: shmobile: r8a73a4 " Geert Uytterhoeven
2014-11-07 5:26 ` Wolfram Sang
2014-11-10 1:04 ` Simon Horman
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