From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Addy Ke <addy.ke-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: max.schwarz-BGeptl67XyCzQB+pC5nmwQ@public.gmane.org,
heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org,
olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org,
dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
cf-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
xjq-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
huangtao-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
zyw-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
yzq-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
hj-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
kever.yang-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
hl-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
caesar.wang-TNX95d0MmH7DzftRWevZcw@public.gmane.org,
zhengsq-TNX95d0MmH7DzftRWevZcw@public.gmane.org
Subject: Re: [PATCH v2] i2c: rk3x: fix divisor calculation for SCL frequency
Date: Sat, 20 Sep 2014 14:19:05 +0200 [thread overview]
Message-ID: <20140920121904.GB3850@katana> (raw)
In-Reply-To: <1410147505-5930-1-git-send-email-addy.ke-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
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On Mon, Sep 08, 2014 at 11:38:25AM +0800, Addy Ke wrote:
> I2C_CLKDIV register descripted in the previous version of
> RK3x chip manual is incorrect. Plus 1 is required.
>
> The correct formula:
> - T(SCL_HIGH) = T(PCLK) * (CLKDIVH + 1) * 8
> - T(SCL_LOW) = T(PCLK) * (CLKDIVL + 1) * 8
> - (SCL Divsor) = 8 * ((CLKDIVL + 1) + (CLKDIVH + 1))
> - SCL = PCLK / (CLK Divsor)
>
> It will be updated to the latest version of chip manual.
>
> Signed-off-by: Addy Ke <addy.ke-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Applied to for-next, thanks!
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From: wsa@the-dreams.de (Wolfram Sang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] i2c: rk3x: fix divisor calculation for SCL frequency
Date: Sat, 20 Sep 2014 14:19:05 +0200 [thread overview]
Message-ID: <20140920121904.GB3850@katana> (raw)
In-Reply-To: <1410147505-5930-1-git-send-email-addy.ke@rock-chips.com>
On Mon, Sep 08, 2014 at 11:38:25AM +0800, Addy Ke wrote:
> I2C_CLKDIV register descripted in the previous version of
> RK3x chip manual is incorrect. Plus 1 is required.
>
> The correct formula:
> - T(SCL_HIGH) = T(PCLK) * (CLKDIVH + 1) * 8
> - T(SCL_LOW) = T(PCLK) * (CLKDIVL + 1) * 8
> - (SCL Divsor) = 8 * ((CLKDIVL + 1) + (CLKDIVH + 1))
> - SCL = PCLK / (CLK Divsor)
>
> It will be updated to the latest version of chip manual.
>
> Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Applied to for-next, thanks!
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From: Wolfram Sang <wsa@the-dreams.de>
To: Addy Ke <addy.ke@rock-chips.com>
Cc: max.schwarz@online.de, heiko@sntech.de, olof@lixom.net,
dianders@chromium.org, linux-i2c@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-rockchip@lists.infradead.org, cf@rock-chips.com,
xjq@rock-chips.com, huangtao@rock-chips.com, zyw@rock-chips.com,
yzq@rock-chips.com, hj@rock-chips.com, kever.yang@rock-chips.com,
hl@rock-chips.com, caesar.wang@rock-chips.com,
zhengsq@rock-chips.com
Subject: Re: [PATCH v2] i2c: rk3x: fix divisor calculation for SCL frequency
Date: Sat, 20 Sep 2014 14:19:05 +0200 [thread overview]
Message-ID: <20140920121904.GB3850@katana> (raw)
In-Reply-To: <1410147505-5930-1-git-send-email-addy.ke@rock-chips.com>
[-- Attachment #1: Type: text/plain, Size: 534 bytes --]
On Mon, Sep 08, 2014 at 11:38:25AM +0800, Addy Ke wrote:
> I2C_CLKDIV register descripted in the previous version of
> RK3x chip manual is incorrect. Plus 1 is required.
>
> The correct formula:
> - T(SCL_HIGH) = T(PCLK) * (CLKDIVH + 1) * 8
> - T(SCL_LOW) = T(PCLK) * (CLKDIVL + 1) * 8
> - (SCL Divsor) = 8 * ((CLKDIVL + 1) + (CLKDIVH + 1))
> - SCL = PCLK / (CLK Divsor)
>
> It will be updated to the latest version of chip manual.
>
> Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Applied to for-next, thanks!
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next prev parent reply other threads:[~2014-09-20 12:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-05 2:32 [PATCH] i2c: rk3x: fix divisor calculation for SCL frequency Addy Ke
2014-09-05 2:32 ` Addy Ke
2014-09-05 2:32 ` Addy Ke
2014-09-05 4:31 ` Doug Anderson
2014-09-05 4:31 ` Doug Anderson
[not found] ` <CAD=FV=W3JJM38v-X=pyLUjAzY3Ti88xUgWp9bMsX5dqp1gubpg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-09-05 10:17 ` addy ke
2014-09-05 10:17 ` addy ke
2014-09-05 10:17 ` addy ke
2014-09-05 15:20 ` Doug Anderson
2014-09-05 15:20 ` Doug Anderson
[not found] ` <1409884333-3544-1-git-send-email-addy.ke-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2014-09-08 3:38 ` [PATCH v2] " Addy Ke
2014-09-08 3:38 ` Addy Ke
2014-09-08 3:38 ` Addy Ke
2014-09-08 4:15 ` Doug Anderson
2014-09-08 4:15 ` Doug Anderson
[not found] ` <1410147505-5930-1-git-send-email-addy.ke-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2014-09-20 12:19 ` Wolfram Sang [this message]
2014-09-20 12:19 ` Wolfram Sang
2014-09-20 12:19 ` Wolfram Sang
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