Hi,
I am bringing up a OMAP4460 board on dt and I saw the following messages
in the kernel log from "cpufreq-cpu0".
[ 2.373352] cpufreq_cpu0: failed to get cpu0 regulator: -19
[ 2.379302] cpufreq_cpu0: failed to get cpu0 clock: -2
[ 2.384704] cpufreq-cpu0: probe of cpufreq-cpu0.0 failed with error -2
Failure to get the clock is because OMAP4 seems to be lacking a "cpu0" entry
in cclock44xx_data.c. Adding "CLK("cpu0", NULL, &dpll_mpu_ck)," to
"omap44xx_clks" seems to do the trick. This is what OMAP3 has anyways. Think
this failure was caused by commit 60c5fc86d which switched from
"omap-cpufreq" to "cpufreq-cpu0" driver on dt boot.
As far as I can see it makes cpufreq work again. I at least get the
cpufreq nodes in sysfs and can play around with them.
Should I submit a patch for cclock44xx_data.c adding "cpu0"?
Next up is the regulator. Since my board is a 4460 and it seems that
tps63261 support for 4460 never made it to mainline I guess I am out of
luck here?
But for all 4430 boards in mainline I guess it would be nice to add:
&twl {
vdd1: regulator-vdd1 {
compatible = "ti,twl6030-vdd1";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1400000>;
};
};
cpus {
cpu@0 {
cpu0-supply = <&vdd1>;
};
};
I assume this would work but I don't have a 4430 board to test it on.
Unsure about voltage range, but at least 1.0 to 1.4V covers the operation
points for cpu in omap443xx.dtsi.
regards
Joachim Eastwood
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