From mboxrd@z Thu Jan  1 00:00:00 1970
From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Subject: Re: [PATCH 1/2] xen/arm: Initial support for PSCI-0.2
Date: Thu, 2 Oct 2014 15:17:59 -0500
Message-ID: <542DB2F7.8020005@amd.com>
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To: Ian Campbell <Ian.Campbell@citrix.com>, Julien Grall <julien.grall@linaro.org>
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On 10/02/2014 09:19 AM, Ian Campbell wrote:
>>> +int __init psci_init(void)
>>> > >+{
>>> > >+    const struct dt_device_node *psci;
>>> > >+
>>> > >+    psci = dt_find_compatible_node(NULL, NULL, "arm,psci");
>>> > >+    if ( psci )
>>> > >+        return psci_init_0_1(psci);
>>> > >+
>>> > >+    psci = dt_find_compatible_node(NULL, NULL, "arm,psci-0.2");
>>> > >+    if ( psci )
>>> > >+        return psci_init_0_2(psci);
>>> > >+
>> >
>> >I think we need to prefer PSCI 0.2 if the platform supports the both
>> >version of PSCI.
> Yes, please.
>
> This may require also falling back to 0.1 if psci_init_0_2 fails?
>

Good point. I just realized that DT could have:

    compatible = "arm,psci-0.2", "arm,psci"

Suravee