It looks like send email confirmation for the wiki is working again and I
was able to finish user registration for the wiki.
I created a new device for Yones TopTech BS1078 v2 in the wiki as requested.
Back to on topic for this thread, I think I figured out how to work the
external interrupts on the sun6i and this may come in useful for other
people writing or porting device drivers. The code is copied from the mmc
driver's handling of the cd pin.
To define an external interrupt in the dts I used this
gsl3675: touchscreen@40 {
compatible = "silead,gsl3675";
reg = <0x40>;
interrupt-parent = <&pio>;
interrupts = <23 IRQ_TYPE_EDGE_FALLING >;
ts-gpios = <&pio 0 23 GPIO_ACTIVE_HIGH>; /* PA23 */
};
and in the driver module probe, to connect an irq handler, I used this
snippet of code
// Setup the IRQ
desc = devm_gpiod_get_index(dev, "ts", 0, GPIOD_IN);
irq = gpiod_to_irq(desc);
ret = devm_request_threaded_irq(dev, irq, NULL, gsl3675_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, client->name,
data);
It works on an A31 Hummingbird board and fires my irq handler when I bring
the gpio a23 pin to 3V , but it doesn't work on my tablet. I suspect I
have burned out the a23 gpio pin on the A31s of the tablet while probing
since the touchscreen no longer works in Android either but I can see
interrupt pulses on the line with a logic analyzer. I'll give writing the
driver another shot when I get another tablet with a gsl3675 touchscreen on
it.
On Tue, May 26, 2015 at 10:49 PM, Gustavo Zamboni <[email protected]>
wrote:
> When did you get this message ?
> We finished configuring the new mail server yesterday.
> I supose the wiki user credential is ok ( the same we used in the other
> mail server ).
> Maybe its a dns replication delay.
> Can you retest later today ?
>
> Thanks,
>
> Gustavo Zamboni
>
>
> Le 27/05/2015 07:35, Lawrence Yu a écrit :
>
> Hi,
>
> On Tue, May 26, 2015 at 10:17 PM, Priit Laes <[email protected]> wrote:
>
>> On Wednesday, May 27, 2015 at 5:53:06 AM UTC+3, Lawrence Y wrote:
>>>
>>> Hi,
>>>
>>
>> Hi!
>>
>>
>>>
>>> I was wondering if there was an example of a dts that used external
>>> interrupts with the sun6i or sun8i chips? I've been trying to configure an
>>> external interrupt on PA23 with no luck so far. I looked through all of
>>> the sun6i and sun8i dts files for an example but did not find anything that
>>> appeared to be using an external interrupt.
>>>
>>> I did find this documentation on external interrupts on the wiki
>>>
>>
>>> http://linux-sunxi.org/External_interrupts
>>>
>>
>> It is nice that you found our wiki somewhat helpful, but please see below.
>>
>>
>>
>>> but it appears to be for sun7i which does not use a banked interrupt
>>> architecture.
>>>
>>> I also found this patch set which contains functionality for external
>>> interrupts on the sun6i A31, but I think I am misunderstanding how to setup
>>> the interrupt in the dts.
>>>
>>>
>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2014-May/260377.html
>>>
>>> For background, I am trying to get a gsl3675 touchscreen to generate
>>> an IRQ inside the sun6i A31s when the interrupt line toggles. I can
>>> confirm that some signal line toggles when touches are present with a logic
>>> analyzer, but it's unclear if it is PA3 or PA23 and I have been trying
>>> both. The fex file says PA3 but the A31 schematics say PA23.
>>>
>>
>> Now, please start with the New Device Howto page found here:
>>
>> http://linux-sunxi.org/New_Device_howto
>>
>> And work through it, because there currently isn't a single device
>> documented in the wiki with gsl3675 touchscreen controller.
>>
>>
>>
>>> A snippet of the relevant portions of my dts are below, if it helps.
>>> (my dts could be totally wrong)
>>>
>>> &i2c1 {
>>> pinctrl-names = "default";
>>> pinctrl-0 = <&i2c1_pins_a>;
>>> status = "okay";
>>>
>>> gsl3675: touchscreen@40 {
>>> compatible = "silead,gsl3675";
>>> reg = <0x40>;
>>> interrupt-parent = <&pio>;
>>> interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
>>> pinctrl-names = "default";
>>> pinctrl-0 = <&ts_irq_pin>;
>>> };
>>> };
>>>
>>> &pio {
>>> ts_irq_pin: tspin@0 {
>>> allwinner,pins = "PA23";
>>> allwinner,function = "irq";
>>> allwinner,drive = <0>;
>>> allwinner,pull = <1>;
>>> };
>>> };
>>>
>>> When I load my test module I get the following error which may or may
>>> not be relevant. (I don't see where the irq 55 is coming from)
>>>
>>> [ 10.826782] genirq: Setting trigger mode 11 for irq 55 failed
>>> (sunxi_pinctrl_irq_set_type+0x0/0x144)
>>>
>>> If anyone has any suggestions on things I could try to set things up
>>> properly so that the the IRQ will fire, I would appreciate them.
>>>
>>> Thanks!
>>>
>>> Lawrence
>>>
>>>
>>>
>>>
>>>
>>>
>>> --
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>
> I may be doing something wrong registering for the wiki or there might
> be a problem with the wiki sending out confirmation emails. I get the
> following error when trying to register in order to edit the wiki to add a
> new device page. I double checked and my email address appears correct.
>
> linux-sunxi.org could not send your confirmation mail. Please check your
> email address for invalid characters.
>
> Mailer returned: Unknown error in PHP's mail() function.
>
>
> Lawrence
> --
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>
>
>
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