Re: [PATCH 1/5] arm64: zynqmp: Add firmware DT node

[Michal Simek]

On 09. 12. 19 15:32, Guenter Roeck wrote:
> On 12/8/19 11:48 PM, Edgar E. Iglesias wrote:
>> On Sun, Dec 08, 2019 at 11:19:33PM -0800, Guenter Roeck wrote:
>>> On 12/8/19 10:42 PM, Michal Simek wrote:
>>>> Hi, +Edgar
>>>>
>>>>
>>>> On 08. 12. 19 23:38, Guenter Roeck wrote:
>>>>> On Fri, Oct 18, 2019 at 06:07:31PM +0200, Michael Tretter wrote:
>>>>>> From: Rajan Vaja <address@hidden>
>>>>>>
>>>>>> Add firmware DT node in ZynqMP device tree. This node
>>>>>> uses bindings as per new firmware interface driver.
>>>>>>
>>>>>> Signed-off-by: Rajan Vaja <address@hidden>
>>>>>> Signed-off-by: Michal Simek <address@hidden>
>>>>>> Signed-off-by: Michael Tretter <address@hidden>
>>>>>
>>>>> With this patch applied in the mainline kernel, the qemu xlnx-zcu102
>>>>> emulation crashes (see below). Any idea what it might take to get
>>>>> qemu back to working ?
>>>>
>>>> Driver talks through ATF to PMU unit(microblaze). I don't think A53+MB
>>>> concept is working with mainline qemu. But crash is too hard. It should
>>
>> Yes, QEMU doesn't support the Cortex-A53s along with the PMU MicroBlaze.
>>
>> My workaround when using upstream QEMU is a modified DT without the
>> PMU firmware
>> and with fixed-clock nodes.
>>
> 
> I can't do that for my boot tests. Normally I would just disable
> ZYNQMP_FIRMWARE,
> but that is hard enabled with ARCH_ZYNQMP. I'll have to drop those tests,
> unfortunately, if the firmware driver is considered mandatory.

We can make it optional.
Rajan: please send a patch for it.

M