On 11:43-20181227, Lokesh Vutla wrote:

With the system coprocessor managing the range allocation of the
inputs to Interrupt Aggregator, it is difficult to represent
the device IRQs from DT.

The suggestion is to use MSI in such cases where devices wants
to allocate and group interrupts dynamically.

Create a MSI domain bus layer that allocates and frees MSIs for
a device.

APIs that are implemented are:
- inta_msi_create_irq_domain() that creates a MSI domain
- inta_msi_domain_alloc_group_irqs() that creates MSIs for the
  specified device and source indexes. All these are expected to
  be grouped by the parent interrupt controller to MSI domain.
- inta_msi_domain_free_group_irqs() frees the grouped irqs.

Signed-off-by: Lokesh Vutla <redacted>
---

- May be the same functionaly can be included in platform msi. But I would
  like to get a feedback on the approach.

 drivers/soc/ti/Kconfig             |   6 +
 drivers/soc/ti/Makefile            |   1 +
 drivers/soc/ti/k3_inta_msi.c       | 193 +++++++++++++++++++++++++++++
 include/linux/irqdomain.h          |   1 +
 include/linux/msi.h                |   6 +
 include/linux/soc/ti/k3_inta_msi.h |  22 ++++
 6 files changed, 229 insertions(+)
 create mode 100644 drivers/soc/ti/k3_inta_msi.c
 create mode 100644 include/linux/soc/ti/k3_inta_msi.h

Did we miss maintainer file?

-- 
Regards,
Nishanth Menon

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