Hi Bjorn,
On 06/25/2017 03:15 PM, Bjorn Andersson wrote:
> On Tue 13 Jun 16:45 PDT 2017, Suman Anna wrote:
>
>> +static int keystone_rproc_start(struct rproc *rproc)
>> +{
>> + struct keystone_rproc *ksproc = rproc->priv;
>> + int ret;
>> +
>> + INIT_WORK(&ksproc->workqueue, handle_event);
>> +
>> + ret = request_irq(ksproc->irq_ring, keystone_rproc_vring_interrupt, 0,
>> + dev_name(ksproc->dev), ksproc);
>> + if (ret) {
>> + dev_err(ksproc->dev, "failed to enable vring interrupt, ret = %d\n",
>> + ret);
>> + goto out;
>> + }
>> +
>> + ret = request_irq(ksproc->irq_fault, keystone_rproc_exception_interrupt,
>> + 0, dev_name(ksproc->dev), ksproc);
>> + if (ret) {
>> + dev_err(ksproc->dev, "failed to enable exception interrupt, ret = %d\n",
>> + ret);
>> + goto free_vring_irq;
>> + }
>
> I do prefer that your request any resources during probe() and
> potentially enable/disable them here. If below concern about using a
> GPIO driver is cleared already I'll take it as is though.
>
> [..]
>> +static void keystone_rproc_kick(struct rproc *rproc, int vqid)
>> +{
>> + struct keystone_rproc *ksproc = rproc->priv;
>> +
>> + if (WARN_ON(ksproc->kick_gpio < 0))
>> + return;
>> +
>> + gpio_set_value(ksproc->kick_gpio, 1);
>> +}
>> +
>
> This doesn't sound like a gpio-controller and the GPIO maintainer did
> reject an attempt by me to use the GPIO framework to abstract a similar
> thing. Do you already have this driver upstream or have you clarified
> with the maintainer that the GPIO framework is an acceptable abstraction
> for this?
Yeah, this has been upstream since quite some time. See commit
2134cb997f2f ("gpio: syscon: reuse for keystone 2 socs").
regards
Suman
>
> It looks equivalent to the "APCS IPC" register found in Qualcomm
> platforms, previously implemented through a syscon but in v4.13 being
> pushed to being a mailbox driver.
>
>
> Apart from this I think the series looks good.
>
> Regards,
> Bjorn
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