[PATCH v2] i2c: rk3x: fix divisor calculation for SCL frequency
Wolfram Sang
wsa at the-dreams.de
Sat Sep 20 05:19:05 PDT 2014
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 at rock-chips.com>
Applied to for-next, thanks!
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