From b4a7bd7a386dc6b0bb49cb47614e06e8295d495a Mon Sep 17 00:00:00 2001
From: addy ke <addy.ke@rock-chips.com>
Date: Mon, 8 Sep 2014 11:38:25 +0800
Subject: [PATCH] i2c: rk3x: fix divisor calculation for SCL frequency

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>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
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