linux-kernel - Re: [PATCH 2/2] arm: boot: beaglex15: pass correct interrupt

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Message-ID: <CAGTfZH3o_G91qDS6_9tYJHDDAbOWj90rBfCKvi0f-uL0L2PcTA@mail.gmail.com>
Date:	Sat, 21 Nov 2015 01:55:22 +0900
From:	Chanwoo Choi <cwchoi00@...il.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>, Felipe Balbi <balbi@...com>,
	Tony Lindgren <tony@...mide.com>,
	Rob Herring <robh+dt@...nel.org>,
	MyungJoo Ham <myungjoo.ham@...sung.com>
Cc:	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] arm: boot: beaglex15: pass correct interrupt

Hi,

On Sat, Nov 21, 2015 at 1:42 AM, Chanwoo Choi <cwchoi00@...il.com> wrote:
> Hi,
>
> On 2015. 11. 20. 오후 2:39, Chanwoo Choi wrote:
>> Hi,
>>
>> On 2015년 11월 13일 02:53, Felipe Balbi wrote:
>>> According to latest schematics [1], GPIO_1/VBUSDET
>>> on TPS659038 is tied to AM57x GPIO4_21. We can use
>>> that as a VBUS interrupt, instead of relying on
>>> PMIC's VBUS interrupts which don't seem to be firing
>>> on x15 at all.
>>>
>>> A follow up patch will add support for using this
>>> GPIO-based interrupt mechanism for notifying about
>>> VBUS.
>>>
>>> [1] https://github.com/beagleboard/beagleboard-x15/blob/master/BeagleBoard-X15_RevA2.pdf
>>>
>>> Signed-off-by: Felipe Balbi <balbi@...com>
>>> ---
>>>  arch/arm/boot/dts/am57xx-beagle-x15.dts | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> diff --git a/arch/arm/boot/dts/am57xx-beagle-x15.dts b/arch/arm/boot/dts/am57xx-beagle-x15.dts
>>> index 6f3a1a7ec5f9..5e47162f7883 100644
>>> --- a/arch/arm/boot/dts/am57xx-beagle-x15.dts
>>> +++ b/arch/arm/boot/dts/am57xx-beagle-x15.dts
>>> @@ -560,6 +560,7 @@
>>>              extcon_usb2: tps659038_usb {
>>>                      compatible = "ti,palmas-usb-vid";
>>>                      ti,enable-vbus-detection;
>>> +                    interrupts-extended = <&gpio4 21 IRQ_TYPE_EDGE_RISING>;
>
>                         vbus-gpio = <&gpio4 21>;

I'm sorry. I'm sending the missing email without writing completion.

I agree the Felipe's opinion. Just I think that we can use the
following property
instead of 'interrupt-extended'. Because I think 'vbus-gpio' is more
readability than before. The following property mean the attribute of
GPIO pin as VBUS.
- vbus-gpio = <&gpio4 21>;

Thanks,
Chanwoo Choi

>
>>>              };
>>>
>>>      };
>>>
>>
>> I check the schematic file. The GPIO4_21 pin is connected as following:
>> - GPIO_1/VBUSDET -> PMIC_VBUS_DET -> VBUS_DET -> AM5728 GPIO4_21 pin
>>
>> Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>
>>
>> Thanks,
>> Chanwoo Choi
>> --
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