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SubjectRe: omap5 fixing palmas IRQ_TYPE_NONE warning leads to gpadc timeouts
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On 2018-11-13 20:06, Tony Lindgren wrote:
> Hi
>
> * Belisko Marek <marek.belisko@gmail.com> [180703 18:34]:
>> Hi Tony,
>>
>> On Tue, Jul 3, 2018 at 10:45 AM Tony Lindgren <tony@atomide.com> wrote:
>>>
>>> * Belisko Marek <marek.belisko@gmail.com> [180620 09:40]:
>>>> Hello,
>>>>
>>>> I'm trying to fix warning (for omap5 board) produced by recent change
>>>> to avoid using IRQ_TYPE_NONE like:
>>>> [ 1.818666] WARNING: CPU: 1 PID: 778 at
>>>> drivers/irqchip/irq-gic.c:1016 gic_irq_domain_translate+0x78/0x100
>>>> [ 1.828839] Modules linked in:
>>>>
>>>> I did look to other commit which did update and without deep knowledge
>>>> I just simply do this small change:
>>>> diff --git a/arch/arm/boot/dts/omap5-board-common.dtsi
>>>> b/arch/arm/boot/dts/omap5-board-common.dtsi
>>>> index 218892b..ab2df8c 100644
>>>> --- a/arch/arm/boot/dts/omap5-board-common.dtsi
>>>> +++ b/arch/arm/boot/dts/omap5-board-common.dtsi
>>>> @@ -393,7 +393,7 @@
>>>>
>>>> palmas: palmas@48 {
>>>> compatible = "ti,palmas";
>>>> - interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* IRQ_SYS_1N */
>>>> + interrupts = <GIC_SPI 7 IRQ_TYPE_HIGH>; /* IRQ_SYS_1N */
>>>> reg = <0x48>;
>>>> interrupt-controller;
>>>> #interrupt-cells = <2>;
>>>>
>>>> and it looks board boots fine. Only issue is that gpadc driver is not
>>>> working (at least not getting interrupts at all ADC fails with
>>>> timeout). I did look to gpadc driver and driver is not using
>>>> interrupts defined in dts but request interrupt directly from palmas
>>>> mfd module. Any ideas what needs to be changed to have gpadc again
>>>> working with mentioned patch?
>>>
>>> Can you try with IRQF_TRIGGER_HIGH added also to the flags to
>>> regmap_add_irq_chip() in drivers/mfd/palmas.c?
>> Nope issue is till present also after this change like:
>> diff --git a/arch/arm/boot/dts/omap5-board-common.dtsi
>> b/arch/arm/boot/dts/omap5-board-common.dtsi
>> index 218892b..6912769 100644
>> --- a/arch/arm/boot/dts/omap5-board-common.dtsi
>> +++ b/arch/arm/boot/dts/omap5-board-common.dtsi
>> @@ -393,7 +393,7 @@
>>
>> palmas: palmas@48 {
>> compatible = "ti,palmas";
>> - interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* IRQ_SYS_1N */
>> + interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_1N */
>> reg = <0x48>;
>> interrupt-controller;
>> #interrupt-cells = <2>;
>> @@ -432,9 +432,9 @@
>>
>> gpadc: gpadc {
>> compatible = "ti,palmas-gpadc";
>> - interrupts = <18 0
>> - 16 0
>> - 17 0>;
>> + interrupts = <18 IRQ_TYPE_LEVEL_HIGH
>> + 16 IRQ_TYPE_LEVEL_HIGH
>> + 17 IRQ_TYPE_LEVEL_HIGH>;
>> #io-channel-cells = <1>;
>> ti,channel0-current-microamp = <5>;
>> ti,channel3-current-microamp = <10>;
>> diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
>> index 663a239..15d23db 100644
>> --- a/drivers/mfd/palmas.c
>> +++ b/drivers/mfd/palmas.c
>> @@ -601,7 +601,7 @@ static int palmas_i2c_probe(struct i2c_client *i2c,
>> regmap_write(palmas->regmap[slave], addr, reg);
>>
>> ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
>> - IRQF_ONESHOT | pdata->irq_flags, 0,
>> + IRQF_ONESHOT | IRQF_TRIGGER_HIGH |
>> pdata->irq_flags, 0,
>> driver_data->irq_chip, &palmas->irq_data);
>> if (ret < 0)
>> goto err_i2c;
>
> Looks like the IRQ_TYPE_NONE issue still is there for omap5 and
> should be fixed with IRQ_TYPE_HIGH.
>
> No idea about why palmas interrupts would stop working though,
> Peter, do you have any ideas on this one?

No, I don't.
The INT polarity can be changed in Palmas.
based on the pdata->irq_flags (queried via irqd_get_trigger_type())
the code configures it:

if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
reg = PALMAS_POLARITY_CTRL_INT_POLARITY;
else
reg = 0;

and we pass the same irq_flags to the regmap_add_irq_chip()
IRQ_TYPE_LEVEL_HIGH == IRQF_TRIGGER_HIGH == 0x00000004

A change in DT should be enough, no need to patch palmas.c, imho.

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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