lkml.org 
[lkml]   [2014]   [Dec]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v3 0/3] irqchip: vf610-mscm: add support for MSCM interrupt router
Date
Splitted out version of the MSCM driver. My first driver based on the
routeable domain support and was part of the Vybrid Cortex-M4 support
patchset.

So far the MSCM interrupt router was initialized by the boot loader
and configured all interrupts for the Cortex-A5 CPU. There are two
use cases where a proper driver is necessary:
- To run Linux on the Cortex-M4. When the kernel is running on the
non-preconfigured CPU, the interrupt router need to be configured
properly.
- To support deeper sleep modes: LPSTOP clears the interrupt router
configuration, hence a driver needs to restore the configuration
on resume.
I created a seperate patchset for that driver which hopefully makes
it easier to get it into mergeable state.

The patchset is based on the master branch of Linus as of today.

Since I identified some registers likely to be used by other drivers
(e.g. CPU ID or the CPU Generate Interrupt Register) I also added
the "syscon" compatible string to make the registers available for
other drivers in case needed.

Changes since v2
- Use two cell layout for MSCM interrupt router
- Move peripheral interrupt properties to base device tree vfxxx.dtsi
- Use generic two cell xlate (irq_domain_xlate_twocell)
- Add syscon to compatible string
- Remove some line breaks for better readability

Changes since v1 (part of Vybrid Cortex-M4 support)
- Rewrite with irqdomain hierarchy
- Implemented as proper irqchip and move to driver/irqchip/
- Doesn't work on Cortex-M4 anymore (NVIC as parent is not yet
implemented)

Stefan Agner (3):
irqchip: vf610-mscm: add support for MSCM interrupt router
irqchip: vf610-mscm: dt-bindings: add MSCM bindings
ARM: dts: vf610: add Miscellaneous System Control Module (MSCM)

.../bindings/arm/freescale/fsl,vf610-mscm.txt | 19 +++
arch/arm/boot/dts/vf500.dtsi | 128 +-------------
arch/arm/boot/dts/vfxxx.dtsi | 42 +++++
arch/arm/mach-imx/Kconfig | 1 +
drivers/irqchip/Kconfig | 11 ++
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-vf610-mscm.c | 186 +++++++++++++++++++++
7 files changed, 264 insertions(+), 124 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arm/freescale/fsl,vf610-mscm.txt
create mode 100644 drivers/irqchip/irq-vf610-mscm.c

--
2.1.3



\
 
 \ /
  Last update: 2014-12-16 23:21    [W:0.041 / U:1.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site