linux-kernel - Re: [PATCH v2 0/4] Add bcm2835aux interrupt controller

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Message-ID: <687bd44a-8b6c-edf9-7dff-c9a5356b20ed@gmail.com>
Date:   Mon, 12 Jun 2017 11:23:05 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Phil Elwell <phil@...pberrypi.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Eric Anholt <eric@...olt.net>,
        Russell King <linux@...linux.org.uk>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 0/4] Add bcm2835aux interrupt controller

On 06/12/2017 07:25 AM, Phil Elwell wrote:
> Devices in the BCM2835 AUX block share a common interrupt line, with a
> register indicating which devices have active IRQs. Expose this as a
> nested interrupt controller to avoid IRQ sharing problems (easily
> observed if UART1 and SPI1/2 are enabled simultaneously).
> 
> This patch set is complicated by the fact that the DT node for the AUX
> clock controller includes the AUXIRQ register needed by this driver.
> Patch 1 lays the groundwork by allowing this overlap and preparing for
> a future DT change that removes it.

Nit: there seems to be something wrong with your git send-email options,
the threading should be:

[PATCH 0]
   [PATCH 1]

instead, patches 1-4 don't appear as replies to patch 0 anyhow, with the
minor nits here and there, this looks good, thanks!

> 
> Changes in v2:
> * Add DT bindings and header file for bcm2835-aux-intc.
> * Split the interrupt-controller functionality into a dedicated irqchip
>   driver with a dedicated DT node.
> * Remove mask tracking from the intc driver, so that all interrupts
>   (including spurious ones) are submitted to the IRQ framework.
> * Replace hard-coded masks with BIT macro in the intc driver.
> * Prepare the AUX clock driver for a time when its DT node may only be
>   a single word register, but until then ioremap its region without
>   reserving it to permit sharing.
> 
> Phil Elwell (4):
>   clk: bcm2835: More flexible IO register remapping
>   dt: bindings: Add bindings for bcm2835-aux-intc
>   irqchip: Add BCM2835 AUX interrupt controller
>   ARM: dts: bcm283x: Add and use bcm2835-aux-intc
> 
>  .../interrupt-controller/brcm,bcm2835-aux-intc.txt |  28 ++++
>  arch/arm/boot/dts/bcm283x.dtsi                     |  27 +++-
>  drivers/clk/bcm/clk-bcm2835-aux.c                  |  20 ++-
>  drivers/irqchip/Makefile                           |   2 +-
>  drivers/irqchip/irq-bcm2835-aux.c                  | 155 +++++++++++++++++++++
>  .../interrupt-controller/bcm2835-aux-intc.h        |  20 +++
>  6 files changed, 243 insertions(+), 9 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-aux-intc.txt
>  create mode 100644 drivers/irqchip/irq-bcm2835-aux.c
>  create mode 100644 include/dt-bindings/interrupt-controller/bcm2835-aux-intc.h
> 


-- 
Florian