linux-kernel - [PATCH v7 0/3] PM / AVS: SVS: Introduce SVS engine

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Message-ID: <20200316072316.7156-1-roger.lu@mediatek.com>
Date:   Mon, 16 Mar 2020 15:23:14 +0800
From:   Roger Lu <roger.lu@...iatek.com>
To:     Kevin Hilman <khilman@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Nicolas Boichat <drinkcat@...gle.com>,
        Stephen Boyd <sboyd@...nel.org>
CC:     Fan Chen <fan.chen@...iatek.com>,
        HenryC Chen <HenryC.Chen@...iatek.com>,
        YT Lee <yt.lee@...iatek.com>,
        Xiaoqing Liu <Xiaoqing.Liu@...iatek.com>,
        Charles Yang <Charles.Yang@...iatek.com>,
        Angus Lin <Angus.Lin@...iatek.com>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Nishanth Menon <nm@...com>, Roger Lu <roger.lu@...iatek.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>
Subject: [PATCH v7 0/3] PM / AVS: SVS: Introduce SVS engine

1. SVS driver use OPP adjust event in [1] to update OPP table voltage part.
2. SVS dts node refers to CPU opp table [2] and GPU opp table [3].
3. SVS and thermal dts use the same thermal efuse [4].
4. SVS dts needs PMIC regulator [5].
 
[1] https://patchwork.kernel.org/patch/11193513/
[2] https://patchwork.kernel.org/patch/11304935/
[3] https://patchwork.kernel.org/patch/11423009/
[4] https://patchwork.kernel.org/patch/11316495/
[5] https://patchwork.kernel.org/patch/11284617/

pending discussion on v7:
- SVS sub-node architecture pending discussion in below patch.
https://lore.kernel.org/patchwork/patch/1175994/

changes since v6:
- svs_isr_handler() function is merged into svs_isr().
- In svs_isr(), we find which bank fires interrupt first and check this bank
is suspended or not secondly.
- Use memdup_user_nul() instead of copy_from_user().
- Use U32_MAX instead of "(u32)-1.
- SVS needs to do resume after thermal resume in system suspend flow.
Therefore, change SVS pm_ops to prepare/complete.
- Add high temperature voltages compensation codes.
- Add irqflags in "struct svs_platform" for supporting different SVS HW setting.
- Set signed-off voltages to system when system suspend.
- Add SVS HW reset flag for future SVS HW support.
- Coding style refinement.

Roger Lu (3):
  dt-bindings: soc: add mtk svs dt-bindings
  arm64: dts: mt8183: add svs device information
  PM / AVS: SVS: Introduce SVS engine

 .../devicetree/bindings/power/mtk-svs.txt     |   76 +
 arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   16 +
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      |   41 +
 drivers/power/avs/Kconfig                     |   10 +
 drivers/power/avs/Makefile                    |    1 +
 drivers/power/avs/mtk_svs.c                   | 2074 +++++++++++++++++
 include/linux/power/mtk_svs.h                 |   23 +
 7 files changed, 2241 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/mtk-svs.txt
 create mode 100644 drivers/power/avs/mtk_svs.c
 create mode 100644 include/linux/power/mtk_svs.h