Re: [PATCH v4 2/6] power: add power sequence library

[Peter Chen <hzpeterchen-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Wed, Aug 03, 2016 at 03:16:58PM -0700, Matthias Kaehlcke wrote:
> El Tue, Aug 02, 2016 at 11:30:48AM +0800 Peter Chen ha dit:
> 
> > diff --git a/drivers/power/pwrseq/core.c b/drivers/power/pwrseq/core.c
> >
> > ...
> >
> > +static DEFINE_MUTEX(pwrseq_list_mutex);
> > +static LIST_HEAD(pwrseq_list);
> > +
> > +int pwrseq_get(struct device_node *np, struct pwrseq *p)
> > +{
> > +	if (p && p->get)
> > +		return p->get(np, p);
> > +
> > +	return -ENOTSUPP;
> > +}
> > +
> > +int pwrseq_on(struct device_node *np, struct pwrseq *p)
> > +{
> > +	if (p && p->on)
> > +		return p->on(np, p);
> > +
> > +	return -ENOTSUPP;
> > +}
> > +
> > +void pwrseq_off(struct pwrseq *p)
> > +{
> > +	if (p && p->off)
> > +		p->off(p);
> > +}
> > +
> > +void pwrseq_put(struct pwrseq *p)
> > +{
> > +	if (p && p->put)
> > +		p->put(p);
> > +}
> > +
> > +void pwrseq_free(struct pwrseq *p)
> > +{
> > +	if (p && p->free)
> > +		p->free(p);
> > +}
> > +
> > +void pwrseq_register(struct pwrseq *pwrseq)
> > +{
> > +	mutex_lock(&pwrseq_list_mutex);
> > +	list_add(&pwrseq->node, &pwrseq_list);
> > +	mutex_unlock(&pwrseq_list_mutex);
> > +}
> > +
> > +void pwrseq_unregister(struct pwrseq *pwrseq)
> > +{
> > +	mutex_lock(&pwrseq_list_mutex);
> > +	list_del(&pwrseq->node);
> > +	mutex_unlock(&pwrseq_list_mutex);
> > +}
> 
> What is the purpose of pwrseq_register/unregister()? The pwrseq
> structs are added and removed from pwrseq_list, but besides that
> pwrseq_list is not used.
> 

I had thought we may need to dump the pwrseq list in future for debug
purpose. I will delete this unnecessary code.

-- 

Best Regards,
Peter Chen
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