Re: [PATCH v2 1/2] watchdog: Add Cadence WDT driver

From: Michal Simek
Date: Mon Jun 02 2014 - 02:25:40 EST

On 05/29/2014 03:19 PM, Mark Rutland wrote:
> On Thu, May 29, 2014 at 10:43:05AM +0100, Michal Simek wrote:
>> Hi Mark,
>>>> +static struct of_device_id cdns_wdt_of_match[] = {
>>>> + { .compatible = "xlnx,zynq-wdt-r1p2", },
>>>> + { .compatible = "cdns,wdt-r1p2", },
>>> If these can currently be handled identically, why not just have
>>> "cdns,wdt-r1p2" in the driver and in your dts have:
>>> compatible = "xlnx,zynq-wdt-r1p2", "cdns,wdt-r1p2";
>>> If we need to distinguish the two for some reason later we can always
>>> add the "xlnx,zynq-wdt-r1p2" string to the driver.
>> I would prefer to have 2 compatible strings just because
>> of that we don't know what is different compare to origin cadence
>> version. We have done the same for spi-cadence.c that's why
>> it shouldn't be any problem to keep it as is.
>> Having zynq compatible property here and using it give us option
>> that if another SoC vendor come with new configuration or clean
>> cadence one we can simple handle it without changing compatible
>> property for us.
> Sure, we can have two documented strings. But as I mention for the
> moment the driver only needs to support the one string so long as a
> given dts has both. Then we can later distinguish the zynq variant (or
> any other) as necessary.

ok then. Let's use just "xlnx,zynq-wdt-r1p2" compatible string here
and remove "cdns,wdt-r1p2"


Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu -
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform

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