linux-kernel - [RFC 0/5] powerpc/mpic: Add non-contiguous interrupt sources

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Date:   Fri, 27 Jul 2018 15:17:56 +0530
From:   Bharat Bhushan <Bharat.Bhushan@....com>
To:     benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
        oss@...error.net, galak@...nel.crashing.org, mark.rutland@....com,
        kstewart@...uxfoundation.org, gregkh@...uxfoundation.org,
        devicetree@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Cc:     robh@...nel.org, keescook@...omium.org, tyreld@...ux.vnet.ibm.com,
        joe@...ches.com, Bharat Bhushan <Bharat.Bhushan@....com>
Subject: [RFC 0/5] powerpc/mpic: Add non-contiguous interrupt sources

Freescale MPIC h/w may not support all interrupt sources reported
by hardware or "last-interrupt-source" or platform. On these platforms
a misconfigured device tree that assigns one of the reserved
interrupts leaves a non-functioning system without warning.

First Patch just moves the last-irq calculation logic to a function,
Second patch reworks same logic, While I feel that device-tree should
 get precedence over platform provided last-irq, but in this series
 I have not changed this logic.
Third and fourth patch add non-contiguous interrupt sources support
Fifth patch enables this for P2020RDB-PC for now.

Bharat Bhushan (5):
  powerpc/mpic: move last irq logic to function
  powerpc/mpic: Rework last source irq calculation logic
  powerpc/mpic: Add support for non-contiguous irq ranges
  powerpc/mpic: Boot print supported interrupt ranges
  powerpc/fsl: Add supported-irq-ranges for P2020

 .../devicetree/bindings/powerpc/fsl/mpic.txt       |   8 +
 arch/powerpc/boot/dts/fsl/p2020si-post.dtsi        |   3 +
 arch/powerpc/include/asm/mpic.h                    |   9 +
 arch/powerpc/platforms/85xx/mpc85xx_rdb.c          |   5 +
 arch/powerpc/sysdev/mpic.c                         | 184 ++++++++++++++++++---
 5 files changed, 182 insertions(+), 27 deletions(-)

-- 
1.9.3