[U-Boot] [RFC] mpc83xx/speed.c

[Andre Schwarz]

I have an issue with i2c-1 bus speed not being calculated correctly on 
MPC8377.

arch/powerpc/cpu/mpc83xx/speed.c lines 320+ are :

#if defined(CONFIG_MPC834x)
         i2c1_clk = tsec2_clk;
#elif defined(CONFIG_MPC8360)
         i2c1_clk = csb_clk;
#elif defined(CONFIG_MPC832x)
         i2c1_clk = enc_clk;
#elif defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x)
         i2c1_clk = enc_clk;
#elif defined(CONFIG_FSL_ESDHC)
         i2c1_clk = sdhc_clk;
#endif


I don't have CONFIG_FSL_ESDHC set ... we're running SPI.
i2c1_clk doesn't get set.


According to the manual the i2c-1 clock source is somewhat ambiguous 
(MPC8379RM p.211) :

a. I2C1 clock is tied to SDHCCM
b. I2C1 clock is tied to ENCCM

I have CSB=333MHz and ENCCM=3 resulting in 111MHz i2c1 clock.

Would it be appropriate to add

#elif defined(CONFIG_MPC837x)
     i2c1_clk = enc_clk;

before the final #endif ?


BTW: Does anybody know which clock setting (SDHCCM or ENCCM) has priority ?

-- 

Regards,
Andre



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