linux-kernel - Re: [UNVERIFIED SENDER] Re: [PATCH 1/1] irqchip: al-fic: add support for irq retrigger

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Date:   Mon, 9 Sep 2019 13:18:21 +0300
From:   "Shenhar, Talel" <talel@...zon.com>
To:     Marc Zyngier <maz@...nel.org>
CC:     <tglx@...utronix.de>, <jason@...edaemon.net>,
        <linux-kernel@...r.kernel.org>, <dwmw@...zon.co.uk>,
        <benh@...nel.crashing.org>, <hhhawa@...zon.com>,
        <ronenk@...zon.com>, <jonnyc@...zon.com>, <hanochu@...zon.com>,
        <barakw@...zon.com>
Subject: Re: [UNVERIFIED SENDER] Re: [PATCH 1/1] irqchip: al-fic: add support
 for irq retrigger


On 9/9/2019 12:40 PM, Marc Zyngier wrote:
> On Mon, 09 Sep 2019 09:39:18 +0100,
> Talel Shenhar <talel@...zon.com> wrote:
>
> Hi Talel,
>
>> Introduce interrupts retrigger support for Amazon's Annapurna Labs Fabric
>> Interrupt Controller.
>>
>> Signed-off-by: Talel Shenhar <talel@...zon.com>
>> ---
>>   drivers/irqchip/irq-al-fic.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/drivers/irqchip/irq-al-fic.c b/drivers/irqchip/irq-al-fic.c
>> index 1a57cee..0b0a737 100644
>> --- a/drivers/irqchip/irq-al-fic.c
>> +++ b/drivers/irqchip/irq-al-fic.c
>> @@ -15,6 +15,7 @@
>>   
>>   /* FIC Registers */
>>   #define AL_FIC_CAUSE		0x00
>> +#define AL_FIC_SET_CAUSE	0x08
>>   #define AL_FIC_MASK		0x10
>>   #define AL_FIC_CONTROL		0x28
>>   
>> @@ -126,6 +127,16 @@ static void al_fic_irq_handler(struct irq_desc *desc)
>>   	chained_irq_exit(irqchip, desc);
>>   }
>>   
>> +static int al_fic_irq_retrigger(struct irq_data *data)
>> +{
>> +	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data);
>> +	struct al_fic *fic = gc->private;
>> +
>> +	writel_relaxed(BIT(data->hwirq), fic->base + AL_FIC_SET_CAUSE);
>> +
>> +	return 1;
>> +}
>> +
>>   static int al_fic_register(struct device_node *node,
>>   			   struct al_fic *fic)
>>   {
>> @@ -159,6 +170,7 @@ static int al_fic_register(struct device_node *node,
>>   	gc->chip_types->chip.irq_unmask = irq_gc_mask_clr_bit;
>>   	gc->chip_types->chip.irq_ack = irq_gc_ack_clr_bit;
>>   	gc->chip_types->chip.irq_set_type = al_fic_irq_set_type;
>> +	gc->chip_types->chip.irq_retrigger = al_fic_irq_retrigger;
>>   	gc->chip_types->chip.flags = IRQCHIP_SKIP_SET_WAKE;
>>   	gc->private = fic;
> Looks good to me. Is this a fix or a new feature? If the former, I can
> queue it up for -rc1.
>
> 	M.

This is an enhancement to the merged al-fic driver. queuing it up sounds 
good.

Thanks Marc!