Hi,
in mpc_i2c_get_fdr_8xxx(), we have:
...
if (of_device_is_compatible(node, "fsl,mpc8544-i2c"))
prescaler = mpc_i2c_get_sec_cfg_8xxx() ? 3 : 2;
if (!prescaler)
prescaler = 1;
...
By restricting to "fsl,mpc8544-i2c", measured I2C speed on fsl p2020 is
only half as fast as configured (w/ prescaler = 1).
In DT (arch/powerpc/boot/dts/fsl/pq3-i2c-0.dtsi), we have "fsl-i2c"
(i.e., generic), for Freescale boards.
What would be the best solution here? Additional "compatible" strings,
e.g. "fsl,p1020-i2c" and adjusting i2c-mpc.c and DT? Or removing the
restriction to "fsl,mpc8544-i2c", i.e. calling
mpc_i2c_get_sec_cfg_8xxx() unconditionally?
Thanks in advance,
Roland.
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