linux-kernel - Re: [PATCH v8] Add MediaTek MT6779 devapc driver

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Message-ID: <1604301856.804.0.camel@mtkswgap22>
Date:   Mon, 2 Nov 2020 15:24:16 +0800
From:   Neal Liu <neal.liu@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
CC:     Neal Liu <neal.liu@...iatek.com>, Rob Herring <robh+dt@...nel.org>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        wsd_upstream <wsd_upstream@...iatek.com>
Subject: Re: [PATCH v8] Add MediaTek MT6779 devapc driver

Gentle ping for these patch series.
Thanks !

On Thu, 2020-10-15 at 11:24 +0800, Neal Liu wrote:
> add subject
> 
> On Thu, 2020-10-15 at 11:20 +0800, Neal Liu wrote:
> > These patch series introduce a MediaTek MT6779 devapc driver.
> > 
> > MediaTek bus fabric provides TrustZone security support and data protection to prevent slaves from being accessed by unexpected masters.
> > The security violation is logged and sent to the processor for further analysis or countermeasures.
> > 
> > Any occurrence of security violation would raise an interrupt, and it will be handled by mtk-devapc driver.
> > The violation information is printed in order to find the murderer.
> > 
> > changes since v7:
> > - fix VIO_MOD_TO_REG_IND calculation wrong problem.
> > - revise parameter type of ISR.
> > 
> > changes since v6:
> > - remove unnecessary mask/unmask module irq during ISR.
> > 
> > changes since v5:
> > - remove redundant write reg operation.
> > - use static variable of vio_dbgs instead.
> > - add stop_devapc() if driver is removed.
> > 
> > changes since v4:
> > - refactor data structure.
> > - merge two simple functions into one.
> > - refactor register setting to prevent too many function call overhead.
> > 
> > changes since v3:
> > - revise violation handling flow to make it more easily to understand
> >   hardware behavior.
> > - add more comments to understand how hardware works.
> > 
> > changes since v2:
> > - pass platform info through DT data.
> > - remove unnecessary function.
> > - remove slave_type because it always equals to 1 in current support SoC.
> > - use vio_idx_num instread of list all devices' index.
> > - add more comments to describe hardware behavior.
> > 
> > changes since v1:
> > - move SoC specific part to DT data.
> > - remove unnecessary boundary check.
> > - remove unnecessary data type declaration.
> > - use read_poll_timeout() instread of for loop polling.
> > - revise coding style elegantly.
> > 
> > 
> > *** BLURB HERE ***
> > 
> > Neal Liu (2):
> >   dt-bindings: devapc: add bindings for mtk-devapc
> >   soc: mediatek: add mt6779 devapc driver
> > 
> >  .../bindings/soc/mediatek/devapc.yaml         |  58 ++++
> >  drivers/soc/mediatek/Kconfig                  |   9 +
> >  drivers/soc/mediatek/Makefile                 |   1 +
> >  drivers/soc/mediatek/mtk-devapc.c             | 308 ++++++++++++++++++
> >  4 files changed, 376 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/soc/mediatek/devapc.yaml
> >  create mode 100644 drivers/soc/mediatek/mtk-devapc.c
> > 
> 
>