From: Wolfgang Grandegger Date: Tue, 30 Sep 2008 08:55:57 +0000 (+0200) Subject: 85xx: Using proper I2C source clock divider for MPC8544 X-Git-Tag: v2008.10-rc3~24^2~1^2~1^2~1 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=dffd2446fb041f38ef034b0fcf41e51e5e489159;p=u-boot 85xx: Using proper I2C source clock divider for MPC8544 Measurements with our MPC8544 board showed that the I2C bus frequency is wrong by a factor of 1.5. Obviously, the interpretation of the MPC85xx_PORDEVSR2_SEC_CFG bit of the cfg_sec_freq register is not correct. There seems to be an error in the 8544 RM. Signed-off-by: Wolfgang Grandegger --- diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c index 485ba20fd7..70dfad0321 100644 --- a/cpu/mpc85xx/speed.c +++ b/cpu/mpc85xx/speed.c @@ -102,9 +102,9 @@ int get_clocks (void) * PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544. */ if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG) - gd->i2c1_clk = sys_info.freqSystemBus / 3; - else gd->i2c1_clk = sys_info.freqSystemBus / 2; + else + gd->i2c1_clk = sys_info.freqSystemBus / 3; #else /* Most 85xx SOCs use CCB/2, so this is the default behavior. */ gd->i2c1_clk = sys_info.freqSystemBus / 2;