Hi!
This is most likely a wrong forum. Please forward me to proper one if you
know what.
I try to make am335x based board to running on linux-ti-staging_3.14.bb
Unfortunately this board has fixed regulators that am335 does not have any
control at all. Board boots, but starts spitting following log:
(1) [ 4.427294] cpu cpu0: of_pm_voltdm_notifier_register: Fail
calculating voltage latency[1100000<->1260000]:-22
(1b)[ 4.455935] PM: Voltage scaling data blob not provided from DT.
(2) [ 6.332180] clk_set_rate: failed to set dpll_mpu_ck rate
(3)[ 6.414665] cpu cpu0: clk_voltdm_notifier_handler: Failed to scale
voltage(1100000): -22
(4)[ 6.422953] cpufreq_cpu0: failed to set clock rate: -16
(5)[ 6.428302] cpufreq: __cpufreq_driver_target: Failed to change cpu
frequency: -16
(6)[ 6.764032] cpu cpu0: clk_voltdm_notifier_handler: Failed to scale
voltage(1260000): -22
Thereafter log is repeting sequence (2)..(6)
Places of log lines are as follows:
(1)(3)(6): drivers/power/voltdm/core.c : of_pm_voltdm_notifier_register
(2): drivers/clk/ti/clk.c : clk_set_rate
(4): drivers/cpufreq/cpufreq-cpu0.c : __cpufreq_driver_target
(5): drivers/cpufreq/cpufreq.c : __cpufreq_driver_target
Possibly initial call is coming from (5) and others are coming function
calls inside next call etc.
In principle defconfig is defconfig of am335x-evm board with the exception
that I have compiled
am335x-pm-firmware.elf in kernel.
I have defined device voltage regulators in device tree as follows:
cpus {
cpu@0 {
cpu0-supply = <&vmpu_fixed>;
};
}; /* cpu */
vmpu_fixed: fixedregulator@0 {
compatible = "regulator-fixed";
regulator-name = "vdd_mpu";
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
regulator-boot-on;
}; /* vmpu_fixed */
I have not defined any regulators with voltage 1260000 microvolts
unlike log lists.
DT includes am33xx.dtsi, but I did not find that kind of definitions there.
Thanks,
Matti
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