Re: [PATCH v6] mfd: syscon: Add hardware spinlock support

From: Baolin Wang
Date: Tue Dec 19 2017 - 06:05:21 EST

On 19 December 2017 at 17:21, Mark Brown <broonie@xxxxxxxxxx> wrote:
> On Tue, Dec 19, 2017 at 02:55:47PM +0800, Baolin Wang wrote:
>> Um, why regmap doesn't accept a zero lock-id, that because regmap will
>> reguest hwlock depending on the 'regmap_config->hwlock_id' is not
>> zero, if regmap regard a zero lock-id as valid which will affect other
>> 'struct regmap_config' definition. So users should not assign the zero
>> lock-id to regmap.
>> Now of_hwspin_lock_get_id() can return 0 as valid, which depend on
>> what is the base id registered by hwspinlock driver. So you think we
>> should not regard 0 as valid from of_hwspin_lock_get_id(), I can try
>> to send another patch to fix.
> If 0 is a valid hwspinlock ID you need to add a flag to the regmap
> config to say if a hwspinlock should be used. That way we're not
> rejecting valid values.

Fine, that seems reasonable if you prefer another new flag to indicate
if a hwspinlock should be used. Thanks Arnd and Mark's comments.

Best Regards