| From: |
| Roger Lu <roger.lu-AT-mediatek.com> |
| To: |
| Matthias Brugger <matthias.bgg-AT-gmail.com>, Enric Balletbo Serra <eballetbo-AT-gmail.com>, Kevin Hilman <khilman-AT-kernel.org>, Rob Herring <robh+dt-AT-kernel.org>, Nicolas Boichat <drinkcat-AT-google.com>, Stephen Boyd <sboyd-AT-kernel.org>, Philipp Zabel <p.zabel-AT-pengutronix.de> |
| Subject: |
| [PATCH v23 0/7] soc: mediatek: SVS: introduce MTK SVS |
| Date: |
| Mon, 21 Feb 2022 14:39:32 +0800 |
| Message-ID: |
| <20220221063939.14969-1-roger.lu@mediatek.com> |
| Cc: |
| Fan Chen <fan.chen-AT-mediatek.com>, HenryC Chen <HenryC.Chen-AT-mediatek.com>, Xiaoqing Liu <Xiaoqing.Liu-AT-mediatek.com>, Charles Yang <Charles.Yang-AT-mediatek.com>, Angus Lin <Angus.Lin-AT-mediatek.com>, Mark Rutland <mark.rutland-AT-arm.com>, Nishanth Menon <nm-AT-ti.com>, Roger Lu <roger.lu-AT-mediatek.com>, <devicetree-AT-vger.kernel.org>, <linux-arm-kernel-AT-lists.infradead.org>, <linux-mediatek-AT-lists.infradead.org>, <linux-kernel-AT-vger.kernel.org>, <linux-pm-AT-vger.kernel.org>, <Project_Global_Chrome_Upstream_Group-AT-mediatek.com>, Guenter Roeck <linux-AT-roeck-us.net>, Jia-wei Chang <jia-wei.chang-AT-mediatek.com> |
| Archive-link: |
| Article |
The Smart Voltage Scaling(SVS) engine is a piece of hardware
which calculates suitable SVS bank voltages to OPP voltage table.
Then, DVFS driver could apply those SVS bank voltages to PMIC/Buck
when receiving OPP_EVENT_ADJUST_VOLTAGE.
1. SVS driver uses OPP adjust event in [1] to update OPP table voltage part.
2. SVS driver gets thermal/GPU device by node [2][3] and CPU device by get_cpu_device().
After retrieving subsys device, SVS driver calls device_link_add() to make sure probe/suspend callback priority.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/p...
[2] https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/p...
[3] https://git.kernel.org/pub/scm/linux/kernel/git/matthias....
change since v22:
- Make "svsb_volt = max(svsb->volt[i] + temp_voffset, svsb->vmin);" become one line.
- Remove voffset read/write commands for better system safety.
- Add more comments on @turn_freq_base.
Roger Lu (7):
[v23,1/7] dt-bindings: soc: mediatek: add mtk svs dt-bindings
[v23,2/7] arm64: dts: mt8183: add svs device information
[v23,3/7] soc: mediatek: SVS: introduce MTK SVS engine
[v23,4/7] soc: mediatek: SVS: add monitor mode
[v23,5/7] soc: mediatek: SVS: add debug commands
[v23,6/7] dt-bindings: soc: mediatek: add mt8192 svs dt-bindings
[v23,7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver
.../bindings/soc/mediatek/mtk-svs.yaml | 91 +
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 16 +
drivers/soc/mediatek/Kconfig | 10 +
drivers/soc/mediatek/Makefile | 1 +
drivers/soc/mediatek/mtk-svs.c | 2398 +++++++++++++++++
5 files changed, 2516 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
create mode 100644 drivers/soc/mediatek/mtk-svs.c
