On 01/03/16 15:18, Andreas Färber wrote:
Am 01.03.2016 um 15:43 schrieb Sudeep Holla:
On 29/02/16 23:44, Andreas Färber wrote:
+ psci {
+ compatible = "arm,psci";
Any particular reason why PSCI v0.2 or above is not supported on this
platform. PSCI v0.1 is very old now and I assume this platform is
relatively new.
I am not affiliated with Amlogic or Tronsmart, so I cannot answer why.
OK
+ method = "smc";
+ cpu_suspend = <0xc4000001>;
+ cpu_off = <0x84000002>;
+ cpu_on = <0xc4000003>;
+ migrate = <0xc4000005>;
Atleast the functions ids look like v0.2 or above. So check if it's
actually v0.2 or above
If you let me know how! Just change the compatible string to -0.2 and
wait for some big boom or watch out for any misbehavior in particular?
Not exactly. Just having -0.2 in compatible will issue PSCI_VERSION
which *should be* available in v0.2 and above. If you get error there,
then we can *assume* it's PSCI v0.1. Hopefully it be sanely return
error if that's not implemented.
Note that we can only assume, as it might be v0.2 but missed to
implement PSCI_VERSION which is mandatory though.
Are there any memory locations to check the version or something visible
in U-Boot source code indicating it?
Ah so, PSCI is implemented in U-Boot on this platform ? If so, and if
the source is available it should not be that hard to figure that out.
--
Regards,
Sudeep
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