linux-kernel - [PATCH v4 0/5] MediaTek PMIC Wrap improvements and cleanups

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220517104712.24579-1-angelogioacchino.delregno@collabora.com>
Date:   Tue, 17 May 2022 12:47:07 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        nfraprado@...labora.com, rex-bc.chen@...iatek.com,
        zhiyong.tao@...iatek.com,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v4 0/5] MediaTek PMIC Wrap improvements and cleanups

This series is meant to improve the mtk-pmic-wrap driver;
that's done by removing the custom pwrap_wait_for_state() function
and correctly using the readx_poll_timeout macro instead, which is
doing exactly the same as the former.

As also shown in a patch [1] by Zhiyong Tao (MediaTek), performing
a tight loop is not desired: because of the operation timing in the
SPMI PMICs on these platforms, it makes more sense to wait for some
microseconds before trying to read again, reducing CPU busy time
around these state waits. For this purpose, a ~10uS delay was chosen.

While at it, I also took the occasion to tidy up this driver a
little by optimizing its probe() function.

[1]: https://patchwork.kernel.org/project/linux-mediatek/patch/20220329115824.13005-2-zhiyong.tao@mediatek.com/

Changes in v4:
 - Avoided moving call to platform_get_irq in patch 3/5
 - Dropped Nicolas' tags from patch 3/5 as it's different now
 - Added newline for readability in comment on patch 5/5

Changes in v3:
 - Added two more cleanup patches (4/5, 5/5)

Changes in v2:
 - Fixed a critical typo in patch 1/5. Thanks Nicolas!

AngeloGioacchino Del Regno (5):
  soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom
    function
  soc: mediatek: pwrap: Switch to
    devm_platform_ioremap_resource_byname()
  soc: mediatek: pwrap: Check return value of platform_get_irq()
  soc: mediatek: pwrap: Move IO pointers to new structure
  soc: mediatek: pwrap: Compress of_device_id entries to one line

 drivers/soc/mediatek/mtk-pmic-wrap.c | 225 ++++++++++++---------------
 1 file changed, 97 insertions(+), 128 deletions(-)

-- 
2.35.1