Re: [PATCH v1 2/2] drivers: clk: zynqmp: Add versal-net compatible string

[Michal Simek <michal.simek@amd.com>]

On 3/30/23 13:08, Krzysztof Kozlowski wrote:
> On 30/03/2023 11:13, Shubhrajyoti Datta wrote:
>> From: Jay Buddhabhatti <jay.buddhabhatti@xilinx.com>
>>
>> Add compatible string for versal-net.
>>
>> Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@xilinx.com>
>> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
>> ---
>>
>>   drivers/clk/zynqmp/clkc.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/clk/zynqmp/clkc.c b/drivers/clk/zynqmp/clkc.c
>> index 5636ff1ce552..1ea5fba20d91 100644
>> --- a/drivers/clk/zynqmp/clkc.c
>> +++ b/drivers/clk/zynqmp/clkc.c
>> @@ -789,6 +789,7 @@ static int zynqmp_clock_probe(struct platform_device *pdev)
>>   static const struct of_device_id zynqmp_clock_of_match[] = {
>>   	{.compatible = "xlnx,zynqmp-clk"},
>>   	{.compatible = "xlnx,versal-clk"},
>> +	{.compatible = "xlnx,versal-net-clk"},
> 
> Why no driver data? Why do you create new driver matchings if devices
> are compatible?

It is the same discussion as we had recently in connection to emmc.
versal-net is new SOC and if any issue happens we would apply workaround based 
on DT compatible string. And by using special compatible string directly from 
beginning will allow us to do changes without change DT.

We actually don't need to update the driver for this. We can just simply list 
new dt binding and use both compatible string in DT like this.
"xlnx,versal-net-clk", "xlnx,versal-clk"

Thanks,
Michal