On 06/26/2017 03:06 PM, Bjorn Andersson wrote:
> On Mon 26 Jun 08:54 PDT 2017, Suman Anna wrote:
>
>> 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").
>>
>
> Okay, sounds good. I have merged the series.
>
>
> I still would like to have resources allocated at probe() time, so I
> would appreciate a follow up patch moving the request_irq()s to probe,
> per above comment (but we can take that after v4.13).
OK thanks. This is a common theme across all the remoteproc drivers
supporting rpmsg, and I definitely need to disable them in probe since
the boot or the virtio/rpmsg devices are not guaranteed to be present in
the probe.
regards
Suman
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