Re: [PATCH v2 09/10] irqchip: ti-sci-inta: Add support for Interrupt Aggregator driver

Peter Ujfalusi
2018-10-22T10:43:25Z

On 2018-10-22 13:42, Peter Ujfalusi wrote:
> Lokesh,
>
> On 2018-10-18 18:40, Lokesh Vutla wrote:
>> Texas Instruments' K3 generation SoCs has an IP Interrupt Aggregator
>> which is an interrupt controller that does the following:
>> - Converts events to interrupts that can be understood by
>> an interrupt router.
>> - Allows for multiplexing of events to interrupts.
>> - Allows for grouping of multiple events to a single interrupt.
>>
>> Configuration of the interrupt aggregator registers can only be done by
>> a system co-processor and the driver needs to send a message to this
>> co processor over TISCI protocol.
>>
>> Add support for Interrupt Aggregator driver over TISCI protocol.
>
> Have you compiled this?
>
> ...
>
>> diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
>> new file mode 100644
>> index 000000000000..ef0a2e8b782c
>> --- /dev/null
>> +++ b/drivers/irqchip/irq-ti-sci-inta.c
>
> ...
>
>> +/**
>> + * ti_sci_inta_register_event() - Register a event to an interrupt aggregator
>> + * @dev: Device pointer to source generating the event
>> + * @src_id: TISCI device ID of the event source
>> + * @src_index: Event source index within the device.
>> + * @virq: Linux Virtual IRQ number
>> + * @flags: Corresponding IRQ flags
>> + * @ack_needed: If explicit clearing of event is required.
>> + *
>> + * Creates a new irq and attaches to IA domain if virq is not specified
>> + * else attaches the event to vint corresponding to virq.
>> + * When using TISCI within the client drivers, source indexes are always
>> + * generated dynamically and cannot be represented in DT. So client
>> + * drivers should call this API instead of platform_get_irq().
>> + *
>> + * Return virq if all went well else appropriate error value.
>> + */
>> +int ti_sci_inta_register_event(struct device *dev, u16 src_id, u16 src_index,
>> + unsigned int virq, u32 flags, bool ack_needed)

And can you swap the flags and ack_needed?

>> +{
>
> ...
>
>> diff --git a/include/linux/irqchip/irq-ti-sci-inta.h b/include/linux/irqchip/irq-ti-sci-inta.h
>> new file mode 100644
>> index 000000000000..c078234fda3f
>> --- /dev/null
>> +++ b/include/linux/irqchip/irq-ti-sci-inta.h
>> @@ -0,0 +1,35 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Texas Instruments' System Control Interface (TI-SCI) irqchip
>> + *
>> + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
>> + * Lokesh Vutla <lokeshvutla@ti.com>
>> + */
>> +
>> +#ifndef __INCLUDE_LINUX_IRQCHIP_TI_SCI_INTA_H
>> +#define __INCLUDE_LINUX_IRQCHIP_TI_SCI_INTA_H
>> +
>> +#if IS_ENABLED(CONFIG_TI_SCI_INTA_IRQCHIP)
>> +int ti_sci_inta_register_event(struct device *dev, u16 src_id, u16 src_index,
>> + unsigned int virq, u32 flags);
>
> You are missing the ack_needed
>
>> +int ti_sci_inta_unregister_event(struct device *dev, u16 src_id, u16 src_index,
>> + unsigned int virq);
>> +
>> +#else /* CONFIG_TI_SCI_INTA_IRQCHIP */
>> +
>> +static inline int ti_sci_inta_register_event(struct device *dev, u16 src_id,
>> + u16 src_index, unsigned int virq,
>> + u32 flags)
>
> Here as well.
>
>> +{
>> + return -EINVAL;
>> +}
>> +
>> +static inline int ti_sci_inta_unregister_event(struct device *dev, u16 src_id,
>> + u16 src_index, unsigned int virq)
>> +{
>> + return -EINVAL;
>> +}
>> +
>> +#endif /* CONFIG_TI_SCI_INTA_IRQCHIP */
>> +
>> +#endif /* __INCLUDE_LINUX_IRQCHIP_TI_SCI_INTA_H */
>>
>
> - Péter
>
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
>
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- Péter

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