linux-kernel - Re: [PATCH] extcon: palmas: add support for using VBUSDET output

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Date:	Fri, 20 Nov 2015 08:37:18 -0600
From:	Felipe Balbi <balbi@...com>
To:	Chanwoo Choi <cw00.choi@...sung.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] extcon: palmas: add support for using VBUSDET output


Hi Chanwoo,

Chanwoo Choi <cw00.choi@...sung.com> writes:
> Hi Felipe,
>
> On 2015년 11월 20일 14:33, Chanwoo Choi wrote:
>> Hi Felipe,
>> 
>> Looks good to me. But I have one comment.
>> 
>> On 2015년 11월 13일 02:57, Felipe Balbi wrote:
>>> TPS659038 can remux its GPIO_1 as VBUSDET output,
>>> which can be tied to a SoC GPIO and used as a VBUS
>>> interrupt.
>>>
>>> Beagle X15 uses that, in fact, and without it, I
>>> could not get USB peripheral working with that
>>> board.
>>>
>>> Signed-off-by: Felipe Balbi <balbi@...com>
>>> ---
>>>  drivers/extcon/extcon-palmas.c | 22 ++++++++++++++++++++--
>>>  1 file changed, 20 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
>>> index 93c30a885740..7985d092c069 100644
>>> --- a/drivers/extcon/extcon-palmas.c
>>> +++ b/drivers/extcon/extcon-palmas.c
>>> @@ -296,10 +296,28 @@ static int palmas_usb_probe(struct platform_device *pdev)
>>>  	}
>>>  
>>>  	if (palmas_usb->enable_vbus_detection) {
>>> +		int irq = platform_get_irq(pdev, 0);
>>> +
>>> +		if (irq > 0) {
>>> +			/* remux GPIO_1 as VBUSDET */
>>> +			status = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE,
>>> +					PALMAS_PRIMARY_SECONDARY_PAD1,
>>> +					PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK,
>>> +					(1 << 3));
>> 
>> PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT is appropriate instead of
>> using '3'.

good point :-)

>>> +			if (status < 0) {
>>> +				dev_err(&pdev->dev, "can't remux GPIO1\n");
>>> +				return status;
>>> +			}
>>> +
>>> +			palmas_usb->vbus_irq = irq;
>>> +		} else {
>>> +			irq = regmap_irq_get_virq(palmas->irq_data,
>>> +					PALMAS_VBUS_IRQ);
>>> +			palmas_usb->vbus_irq = irq;
>>> +		}
>>> +
>>>  		palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
>>>  						       PALMAS_VBUS_OTG_IRQ);
>>> -		palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
>>> -							   PALMAS_VBUS_IRQ);
>>>  		status = devm_request_threaded_irq(palmas_usb->dev,
>>>  				palmas_usb->vbus_irq, NULL,
>>>  				palmas_vbus_irq_handler,
>>>
>> 
>> Thanks,
>> Chanwoo Choi
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@...r.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at  http://www.tux.org/lkml/
>> 
>
> If you are OK about following patch, I'll apply it on extcon branch.

that's perfect, thanks for fixing it :-)

-- 
balbi

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