[PATCH v16 0/7] soc: mediatek: SVS: introduce MTK SVS

[PATCH v16 0/7] soc: mediatek: SVS: introduce MTK SVS

[Roger Lu]

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.
3. SVS dts refers to reset controller [4] to help reset SVS HW.

#mt8183 SVS related patches
[1] https://patchwork.kernel.org/patch/11193513/
[2] https://patchwork.kernel.org/project/linux-mediatek/patch/20201013102358.22588-2-michael.kao@mediatek.com/
[3] https://patchwork.kernel.org/project/linux-mediatek/patch/20200306041345.259332-3-drinkcat@chromium.org/

#mt8192 SVS related patches
[1] https://patchwork.kernel.org/patch/11193513/
[2] https://patchwork.kernel.org/project/linux-mediatek/patch/20201223074944.2061-1-michael.kao@mediatek.com/
[3] https://lore.kernel.org/patchwork/patch/1360551/
[4] https://patchwork.kernel.org/project/linux-mediatek/patch/20200817030324.5690-5-crystal.guo@mediatek.com/

changes since v15:
- Put (*set_freqs_pct) and (*get_vops) in struct svs_bank because they are part of svs bank's operation
- Add define "SVSB_INIT02_RM_DVTFIXED" and "SVSB_MON_VOLT_IGNORE" to make control clearly.
- Remove unnecessary parenthesis

Roger Lu (7):
  [v16,1/7] dt-bindings: soc: mediatek: add mtk svs dt-bindings
  [v16,2/7] arm64: dts: mt8183: add svs device information
  [v16,3/7] soc: mediatek: SVS: introduce MTK SVS engine
  [v16,4/7] soc: mediatek: SVS: add debug commands
  [v16,5/7] dt-bindings: soc: mediatek: add mt8192 svs dt-bindings
  [v16,6/7] arm64: dts: mt8192: add svs device information
  [v16,7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver

 .../bindings/soc/mediatek/mtk-svs.yaml        |   92 +
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      |   18 +
 arch/arm64/boot/dts/mediatek/mt8192.dtsi      |   34 +
 drivers/soc/mediatek/Kconfig                  |   10 +
 drivers/soc/mediatek/Makefile                 |    1 +
 drivers/soc/mediatek/mtk-svs.c                | 2524 +++++++++++++++++
 6 files changed, 2679 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
 create mode 100644 drivers/soc/mediatek/mtk-svs.c

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[PATCH v16 1/7] dt-bindings: soc: mediatek: add mtk svs dt-bindings

[Roger Lu]

Document the binding for enabling mtk svs on MediaTek SoC.

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/soc/mediatek/mtk-svs.yaml        | 84 +++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml

diff --git a/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml b/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
new file mode 100644
index 000000000000..a855ced410f8
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/mediatek/mtk-svs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek Smart Voltage Scaling (SVS) Device Tree Bindings
+
+maintainers:
+  - Roger Lu <roger.lu@mediatek.com>
+  - Matthias Brugger <matthias.bgg@gmail.com>
+  - Kevin Hilman <khilman@kernel.org>
+
+description: |+
+  The SVS engine is a piece of hardware which has several
+  controllers(banks) for calculating suitable voltage to
+  different power domains(CPU/GPU/CCI) according to
+  chip process corner, temperatures and other factors. Then DVFS
+  driver could apply SVS bank voltage to PMIC/Buck.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8183-svs
+
+  reg:
+    maxItems: 1
+    description: Address range of the MTK SVS controller.
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description: Main clock for MTK SVS controller to work.
+
+  clock-names:
+    const: main
+
+  nvmem-cells:
+    minItems: 1
+    maxItems: 2
+    description:
+      Phandle to the calibration data provided by a nvmem device.
+    items:
+      - description: SVS efuse for SVS controller
+      - description: Thermal efuse for SVS controller
+
+  nvmem-cell-names:
+    items:
+      - const: svs-calibration-data
+      - const: t-calibration-data
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - nvmem-cells
+  - nvmem-cell-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8183-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        svs@1100b000 {
+            compatible = "mediatek,mt8183-svs";
+            reg = <0 0x1100b000 0 0x1000>;
+            interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
+            clocks = <&infracfg CLK_INFRA_THERM>;
+            clock-names = "main";
+            nvmem-cells = <&svs_calibration>, <&thermal_calibration>;
+            nvmem-cell-names = "svs-calibration-data", "t-calibration-data";
+        };
+    };
-- 
2.18.0
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[PATCH v16 2/7] arm64: dts: mt8183: add svs device information

[Roger Lu]

add compitable/reg/irq/clock/efuse setting in svs node

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
---
 arch/arm64/boot/dts/mediatek/mt8183.dtsi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index 80519a145f13..441d617ece43 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -657,6 +657,18 @@
 			status = "disabled";
 		};
 
+		svs: svs@1100b000 {
+			compatible = "mediatek,mt8183-svs";
+			reg = <0 0x1100b000 0 0x1000>;
+			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&infracfg CLK_INFRA_THERM>;
+			clock-names = "main";
+			nvmem-cells = <&svs_calibration>,
+				      <&thermal_calibration>;
+			nvmem-cell-names = "svs-calibration-data",
+					   "t-calibration-data";
+		};
+
 		pwm0: pwm@1100e000 {
 			compatible = "mediatek,mt8183-disp-pwm";
 			reg = <0 0x1100e000 0 0x1000>;
@@ -941,9 +953,15 @@
 			reg = <0 0x11f10000 0 0x1000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
+			thermal_calibration: calib@180 {
+				reg = <0x180 0xc>;
+			};
 			mipi_tx_calibration: calib@190 {
 				reg = <0x190 0xc>;
 			};
+			svs_calibration: calib@580 {
+				reg = <0x580 0x64>;
+			};
 		};
 
 		u3phy: usb-phy@11f40000 {
-- 
2.18.0
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Re: [PATCH v16 2/7] arm64: dts: mt8183: add svs device information

[AngeloGioacchino Del Regno]

Il 28/04/21 08:54, Roger Lu ha scritto:
> add compitable/reg/irq/clock/efuse setting in svs node
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 18 ++++++++++++++++++
>   1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index 80519a145f13..441d617ece43 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -657,6 +657,18 @@
>   			status = "disabled";
>   		};
>   
> +		svs: svs@1100b000 {
> +			compatible = "mediatek,mt8183-svs";
> +			reg = <0 0x1100b000 0 0x1000>;
> +			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
> +			clocks = <&infracfg CLK_INFRA_THERM>;
> +			clock-names = "main";
> +			nvmem-cells = <&svs_calibration>,
> +				      <&thermal_calibration>;
> +			nvmem-cell-names = "svs-calibration-data",
> +					   "t-calibration-data";
> +		};
> +
>   		pwm0: pwm@1100e000 {
>   			compatible = "mediatek,mt8183-disp-pwm";
>   			reg = <0 0x1100e000 0 0x1000>;
> @@ -941,9 +953,15 @@
>   			reg = <0 0x11f10000 0 0x1000>;
>   			#address-cells = <1>;
>   			#size-cells = <1>;
> +			thermal_calibration: calib@180 {
> +				reg = <0x180 0xc>;
> +			};
>   			mipi_tx_calibration: calib@190 {
>   				reg = <0x190 0xc>;
>   			};
> +			svs_calibration: calib@580 {
> +				reg = <0x580 0x64>;
> +			};
>   		};
>   
>   		u3phy: usb-phy@11f40000 {
> 

This patch doesn't apply on the latest linux-next due to some new commits in
mt8183.dtsi, can you please rebase?

Thanks,
- Angelo

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Re: [PATCH v16 2/7] arm64: dts: mt8183: add svs device information

[Roger Lu]

Hi AngeloGioacchino,

Sorry for the late reply. 

On Wed, 2021-10-20 at 17:20 +0200, AngeloGioacchino Del Regno wrote:
> Il 28/04/21 08:54, Roger Lu ha scritto:
> > add compitable/reg/irq/clock/efuse setting in svs node
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 18 ++++++++++++++++++
> >   1 file changed, 18 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > index 80519a145f13..441d617ece43 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > @@ -657,6 +657,18 @@
> >   			status = "disabled";
> >   		};
> >   
> > +		svs: svs@1100b000 {
> > +			compatible = "mediatek,mt8183-svs";
> > +			reg = <0 0x1100b000 0 0x1000>;
> > +			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
> > +			clocks = <&infracfg CLK_INFRA_THERM>;
> > +			clock-names = "main";
> > +			nvmem-cells = <&svs_calibration>,
> > +				      <&thermal_calibration>;
> > +			nvmem-cell-names = "svs-calibration-data",
> > +					   "t-calibration-data";
> > +		};
> > +
> >   		pwm0: pwm@1100e000 {
> >   			compatible = "mediatek,mt8183-disp-pwm";
> >   			reg = <0 0x1100e000 0 0x1000>;
> > @@ -941,9 +953,15 @@
> >   			reg = <0 0x11f10000 0 0x1000>;
> >   			#address-cells = <1>;
> >   			#size-cells = <1>;
> > +			thermal_calibration: calib@180 {
> > +				reg = <0x180 0xc>;
> > +			};
> >   			mipi_tx_calibration: calib@190 {
> >   				reg = <0x190 0xc>;
> >   			};
> > +			svs_calibration: calib@580 {
> > +				reg = <0x580 0x64>;
> > +			};
> >   		};
> >   
> >   		u3phy: usb-phy@11f40000 {
> > 
> 
> This patch doesn't apply on the latest linux-next due to some new commits in
> mt8183.dtsi, can you please rebase?

Okay. I'll rebase it.

> Thanks,
> - Angelo


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Re: [PATCH v16 2/7] arm64: dts: mt8183: add svs device information

[Matthias Brugger]

On 28/04/2021 08:54, Roger Lu wrote:
> add compitable/reg/irq/clock/efuse setting in svs node
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 18 ++++++++++++++++++
>   1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index 80519a145f13..441d617ece43 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -657,6 +657,18 @@
>   			status = "disabled";
>   		};
>   
> +		svs: svs@1100b000 {
> +			compatible = "mediatek,mt8183-svs";
> +			reg = <0 0x1100b000 0 0x1000>;
> +			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
> +			clocks = <&infracfg CLK_INFRA_THERM>;
> +			clock-names = "main";
> +			nvmem-cells = <&svs_calibration>,
> +				      <&thermal_calibration>;
> +			nvmem-cell-names = "svs-calibration-data",
> +					   "t-calibration-data";
> +		};
> +
>   		pwm0: pwm@1100e000 {
>   			compatible = "mediatek,mt8183-disp-pwm";
>   			reg = <0 0x1100e000 0 0x1000>;
> @@ -941,9 +953,15 @@
>   			reg = <0 0x11f10000 0 0x1000>;
>   			#address-cells = <1>;
>   			#size-cells = <1>;

Please add a new line between the different calibartion data, to improve 
readability.

Regards,
Matthias

> +			thermal_calibration: calib@180 {
> +				reg = <0x180 0xc>;
> +			};
>   			mipi_tx_calibration: calib@190 {
>   				reg = <0x190 0xc>;
>   			};
> +			svs_calibration: calib@580 {
> +				reg = <0x580 0x64>;
> +			};
>   		};
>   
>   		u3phy: usb-phy@11f40000 {
> 

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Re: [PATCH v16 2/7] arm64: dts: mt8183: add svs device information

[Roger Lu]

Hi Matthias,

On Thu, 2021-12-30 at 13:54 +0100, Matthias Brugger wrote:
> 
> On 28/04/2021 08:54, Roger Lu wrote:
> > add compitable/reg/irq/clock/efuse setting in svs node
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 18 ++++++++++++++++++
> >   1 file changed, 18 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > index 80519a145f13..441d617ece43 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> > @@ -657,6 +657,18 @@
> >   			status = "disabled";
> >   		};
> >   
> > +		svs: svs@1100b000 {
> > +			compatible = "mediatek,mt8183-svs";
> > +			reg = <0 0x1100b000 0 0x1000>;
> > +			interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
> > +			clocks = <&infracfg CLK_INFRA_THERM>;
> > +			clock-names = "main";
> > +			nvmem-cells = <&svs_calibration>,
> > +				      <&thermal_calibration>;
> > +			nvmem-cell-names = "svs-calibration-data",
> > +					   "t-calibration-data";
> > +		};
> > +
> >   		pwm0: pwm@1100e000 {
> >   			compatible = "mediatek,mt8183-disp-pwm";
> >   			reg = <0 0x1100e000 0 0x1000>;
> > @@ -941,9 +953,15 @@
> >   			reg = <0 0x11f10000 0 0x1000>;
> >   			#address-cells = <1>;
> >   			#size-cells = <1>;
> 
> Please add a new line between the different calibartion data, to improve 
> readability.

No problem and thanks for the review.

> Regards,
> Matthias
> 
> > +			thermal_calibration: calib@180 {
> > +				reg = <0x180 0xc>;
> > +			};
> >   			mipi_tx_calibration: calib@190 {
> >   				reg = <0x190 0xc>;
> >   			};
> > +			svs_calibration: calib@580 {
> > +				reg = <0x580 0x64>;
> > +			};
> >   		};
> >   
> >   		u3phy: usb-phy@11f40000 {
> > 


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[PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[Roger Lu]

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.

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
---
 drivers/soc/mediatek/Kconfig   |   10 +
 drivers/soc/mediatek/Makefile  |    1 +
 drivers/soc/mediatek/mtk-svs.c | 1723 ++++++++++++++++++++++++++++++++
 3 files changed, 1734 insertions(+)
 create mode 100644 drivers/soc/mediatek/mtk-svs.c

diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
index fdd8bc08569e..3c3eedea35f7 100644
--- a/drivers/soc/mediatek/Kconfig
+++ b/drivers/soc/mediatek/Kconfig
@@ -73,4 +73,14 @@ config MTK_MMSYS
 	  Say yes here to add support for the MediaTek Multimedia
 	  Subsystem (MMSYS).
 
+config MTK_SVS
+	tristate "MediaTek Smart Voltage Scaling(SVS)"
+	depends on MTK_EFUSE && NVMEM
+	help
+	  The Smart Voltage Scaling(SVS) engine is a piece of hardware
+	  which has several controllers(banks) for calculating suitable
+	  voltage to different power domains(CPU/GPU/CCI) according to
+	  chip process corner, temperatures and other factors. Then DVFS
+	  driver could apply SVS bank voltage to PMIC/Buck.
+
 endmenu
diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
index 90270f8114ed..0e9e703c931a 100644
--- a/drivers/soc/mediatek/Makefile
+++ b/drivers/soc/mediatek/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
 obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) += mtk-pm-domains.o
 obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
 obj-$(CONFIG_MTK_MMSYS) += mtk-mutex.o
+obj-$(CONFIG_MTK_SVS) += mtk-svs.o
diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
new file mode 100644
index 000000000000..2d2153c92373
--- /dev/null
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -0,0 +1,1723 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 MediaTek Inc.
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_opp.h>
+#include <linux/pm_qos.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/thermal.h>
+
+/* svs bank 1-line sw id */
+#define SVSB_CPU_LITTLE			BIT(0)
+#define SVSB_CPU_BIG			BIT(1)
+#define SVSB_CCI			BIT(2)
+#define SVSB_GPU			BIT(3)
+
+/* svs bank mode support */
+#define SVSB_MODE_ALL_DISABLE		0
+#define SVSB_MODE_INIT01		BIT(1)
+#define SVSB_MODE_INIT02		BIT(2)
+#define SVSB_MODE_MON			BIT(3)
+
+/* svs bank volt flags */
+#define SVSB_INIT01_VOLT_IGNORE		BIT(1)
+#define SVSB_INIT01_VOLT_INC_ONLY	BIT(2)
+#define SVSB_INIT02_RM_DVTFIXED		BIT(8)
+#define SVSB_MON_VOLT_IGNORE		BIT(16)
+
+/* svs bank common setting */
+#define SVSB_DET_CLK_EN			BIT(31)
+#define SVSB_TZONE_HIGH_TEMP_MAX	U32_MAX
+#define SVSB_RUNCONFIG_DEFAULT		0x80000000
+#define SVSB_DC_SIGNED_BIT		0x8000
+#define SVSB_INTEN_INIT0x		0x00005f01
+#define SVSB_INTEN_MONVOPEN		0x00ff0000
+#define SVSB_EN_OFF			0x0
+#define SVSB_EN_MASK			0x7
+#define SVSB_EN_INIT01			0x1
+#define SVSB_EN_INIT02			0x5
+#define SVSB_EN_MON			0x2
+#define SVSB_INTSTS_MONVOP		0x00ff0000
+#define SVSB_INTSTS_COMPLETE		0x1
+#define SVSB_INTSTS_CLEAN		0x00ffffff
+
+static DEFINE_SPINLOCK(mtk_svs_lock);
+
+/*
+ * enum svsb_phase - svs bank phase enumeration
+ * @SVSB_PHASE_INIT01: basic init for svs bank
+ * @SVSB_PHASE_INIT02: svs bank can provide voltages
+ * @SVSB_PHASE_MON: svs bank can provide voltages with thermal effect
+ * @SVSB_PHASE_ERROR: svs bank encounters unexpected condition
+ *
+ * Each svs bank has its own independent phase. We enable each svs bank by
+ * running their phase orderly. However, When svs bank encounters unexpected
+ * condition, it will fire an irq (PHASE_ERROR) to inform svs software.
+ *
+ * svs bank general phase-enabled order:
+ * SVSB_PHASE_INIT01 -> SVSB_PHASE_INIT02 -> SVSB_PHASE_MON
+ */
+enum svsb_phase {
+	SVSB_PHASE_ERROR = 0,
+	SVSB_PHASE_INIT01,
+	SVSB_PHASE_INIT02,
+	SVSB_PHASE_MON,
+};
+
+enum svs_reg_index {
+	DESCHAR = 0,
+	TEMPCHAR,
+	DETCHAR,
+	AGECHAR,
+	DCCONFIG,
+	AGECONFIG,
+	FREQPCT30,
+	FREQPCT74,
+	LIMITVALS,
+	VBOOT,
+	DETWINDOW,
+	CONFIG,
+	TSCALCS,
+	RUNCONFIG,
+	SVSEN,
+	INIT2VALS,
+	DCVALUES,
+	AGEVALUES,
+	VOP30,
+	VOP74,
+	TEMP,
+	INTSTS,
+	INTSTSRAW,
+	INTEN,
+	CHKINT,
+	CHKSHIFT,
+	STATUS,
+	VDESIGN30,
+	VDESIGN74,
+	DVT30,
+	DVT74,
+	AGECOUNT,
+	SMSTATE0,
+	SMSTATE1,
+	CTL0,
+	DESDETSEC,
+	TEMPAGESEC,
+	CTRLSPARE0,
+	CTRLSPARE1,
+	CTRLSPARE2,
+	CTRLSPARE3,
+	CORESEL,
+	THERMINTST,
+	INTST,
+	THSTAGE0ST,
+	THSTAGE1ST,
+	THSTAGE2ST,
+	THAHBST0,
+	THAHBST1,
+	SPARE0,
+	SPARE1,
+	SPARE2,
+	SPARE3,
+	THSLPEVEB,
+};
+
+static const u32 svs_regs_v2[] = {
+	[DESCHAR]		= 0xc00,
+	[TEMPCHAR]		= 0xc04,
+	[DETCHAR]		= 0xc08,
+	[AGECHAR]		= 0xc0c,
+	[DCCONFIG]		= 0xc10,
+	[AGECONFIG]		= 0xc14,
+	[FREQPCT30]		= 0xc18,
+	[FREQPCT74]		= 0xc1c,
+	[LIMITVALS]		= 0xc20,
+	[VBOOT]			= 0xc24,
+	[DETWINDOW]		= 0xc28,
+	[CONFIG]		= 0xc2c,
+	[TSCALCS]		= 0xc30,
+	[RUNCONFIG]		= 0xc34,
+	[SVSEN]			= 0xc38,
+	[INIT2VALS]		= 0xc3c,
+	[DCVALUES]		= 0xc40,
+	[AGEVALUES]		= 0xc44,
+	[VOP30]			= 0xc48,
+	[VOP74]			= 0xc4c,
+	[TEMP]			= 0xc50,
+	[INTSTS]		= 0xc54,
+	[INTSTSRAW]		= 0xc58,
+	[INTEN]			= 0xc5c,
+	[CHKINT]		= 0xc60,
+	[CHKSHIFT]		= 0xc64,
+	[STATUS]		= 0xc68,
+	[VDESIGN30]		= 0xc6c,
+	[VDESIGN74]		= 0xc70,
+	[DVT30]			= 0xc74,
+	[DVT74]			= 0xc78,
+	[AGECOUNT]		= 0xc7c,
+	[SMSTATE0]		= 0xc80,
+	[SMSTATE1]		= 0xc84,
+	[CTL0]			= 0xc88,
+	[DESDETSEC]		= 0xce0,
+	[TEMPAGESEC]		= 0xce4,
+	[CTRLSPARE0]		= 0xcf0,
+	[CTRLSPARE1]		= 0xcf4,
+	[CTRLSPARE2]		= 0xcf8,
+	[CTRLSPARE3]		= 0xcfc,
+	[CORESEL]		= 0xf00,
+	[THERMINTST]		= 0xf04,
+	[INTST]			= 0xf08,
+	[THSTAGE0ST]		= 0xf0c,
+	[THSTAGE1ST]		= 0xf10,
+	[THSTAGE2ST]		= 0xf14,
+	[THAHBST0]		= 0xf18,
+	[THAHBST1]		= 0xf1c,
+	[SPARE0]		= 0xf20,
+	[SPARE1]		= 0xf24,
+	[SPARE2]		= 0xf28,
+	[SPARE3]		= 0xf2c,
+	[THSLPEVEB]		= 0xf30,
+};
+
+/*
+ * struct thermal_parameter - This is for storing thermal efuse data.
+ * We calculate thermal efuse data to produce "mts" and "bts" for
+ * svs bank mon mode.
+ */
+struct thermal_parameter {
+	int adc_ge_t;
+	int adc_oe_t;
+	int ge;
+	int oe;
+	int gain;
+	int o_vtsabb;
+	int o_vtsmcu1;
+	int o_vtsmcu2;
+	int o_vtsmcu3;
+	int o_vtsmcu4;
+	int o_vtsmcu5;
+	int degc_cali;
+	int adc_cali_en_t;
+	int o_slope;
+	int o_slope_sign;
+	int ts_id;
+};
+
+/*
+ * struct svs_platform - svs platform data
+ * @dev: svs platform device
+ * @base: svs platform register address base
+ * @main_clk: main clock for svs bank
+ * @pbank: phandle of svs bank and needs to be protected by spin_lock
+ * @banks: phandle of the banks that support
+ * @efuse_parsing: phandle of efuse parsing function
+ * @irqflags: irq settings flags
+ * @rst: svs reset control
+ * @regs: phandle to the registers map
+ * @efuse_num: the total number of svs platform efuse
+ * @tefuse_num: the total number of thermal efuse
+ * @bank_num: the total number of banks
+ * @efuse_check: the svs efuse check index
+ * @efuse: svs platform efuse data received from NVMEM framework
+ * @tefuse: thermal efuse data received from NVMEM framework
+ * @name: svs platform name
+ */
+struct svs_platform {
+	struct device *dev;
+	void __iomem *base;
+	struct clk *main_clk;
+	struct svs_bank *pbank;
+	struct svs_bank *banks;
+	bool (*efuse_parsing)(struct svs_platform *svsp);
+	unsigned long irqflags;
+	struct reset_control *rst;
+	const u32 *regs;
+	char *name;
+	size_t efuse_num;
+	size_t tefuse_num;
+	u32 bank_num;
+	u32 efuse_check;
+	u32 *efuse;
+	u32 *tefuse;
+};
+
+/*
+ * struct svs_bank - svs bank representation
+ * @dev: svs bank device
+ * @opp_dev: device for opp table/buck control
+ * @pd_dev: power domain device for SoC mtcmos control
+ * @init_completion: the timeout completion for bank init
+ * @buck: phandle of the regulator
+ * @lock: mutex lock to protect voltage update process
+ * @phase: bank current phase
+ * @name: bank name
+ * @tzone_name: thermal zone name
+ * @buck_name: regulator name
+ * @suspended: suspend flag of this bank
+ * @pd_req: bank's power-domain on request
+ * @enable_pm_runtime_ever: bank enables pm-runtime flag
+ * @set_freqs_pct: phandle of set frequencies percent function
+ * @get_vops: phandle of get bank voltages function
+ * @volt_offset: bank voltage offset controlled by svs software
+ * @mode_support: bank mode support.
+ * @opp_freqs: signed-off frequencies from default opp table
+ * @opp_volts: signed-off voltages from default opp table
+ * @freqs_pct: percent of "opp_freqs / freq_base" for bank init
+ * @volts: bank voltages
+ * @freq_base: reference frequency for bank init
+ * @vboot: voltage request for bank init01 stage only
+ * @volt_step: bank voltage step
+ * @volt_base: bank voltage base
+ * @volt_flags: bank voltage flags
+ * @vmax: bank voltage maximum
+ * @vmin: bank voltage minimum
+ * @temp: bank temperature
+ * @temp_upper_bound: bank temperature upper bound
+ * @temp_lower_bound: bank temperature lower bound
+ * @tzone_high_temp: thermal zone high temperature threshold
+ * @tzone_high_temp_offset: thermal zone high temperature offset
+ * @tzone_low_temp: thermal zone low temperature threshold
+ * @tzone_low_temp_offset: thermal zone low temperature offset
+ * @core_sel: bank selection
+ * @opp_count: bank opp count
+ * @int_st: bank interrupt identification
+ * @sw_id: bank software identification
+ * @ctl0: bank thermal sensor selection
+ * @cpu_id: cpu core id for SVS CPU only
+ *
+ * Other structure members which are not listed above are svs platform
+ * efuse data for bank init
+ */
+struct svs_bank {
+	struct device *dev;
+	struct device *opp_dev;
+	struct device *pd_dev;
+	struct completion init_completion;
+	struct regulator *buck;
+	struct mutex lock;	/* lock to protect voltage update process */
+	enum svsb_phase phase;
+	char *name;
+	char *tzone_name;
+	char *buck_name;
+	bool suspended;
+	bool pd_req;
+	bool enable_pm_runtime_ever;
+	void (*set_freqs_pct)(struct svs_platform *svsp);
+	void (*get_vops)(struct svs_platform *svsp);
+	s32 volt_offset;
+	u32 mode_support;
+	u32 opp_freqs[16];
+	u32 opp_volts[16];
+	u32 freqs_pct[16];
+	u32 volts[16];
+	u32 freq_base;
+	u32 vboot;
+	u32 volt_step;
+	u32 volt_base;
+	u32 volt_flags;
+	u32 vmax;
+	u32 vmin;
+	u32 bts;
+	u32 mts;
+	u32 bdes;
+	u32 mdes;
+	u32 mtdes;
+	u32 dcbdet;
+	u32 dcmdet;
+	u32 dthi;
+	u32 dtlo;
+	u32 det_window;
+	u32 det_max;
+	u32 age_config;
+	u32 age_voffset_in;
+	u32 agem;
+	u32 dc_config;
+	u32 dc_voffset_in;
+	u32 dvt_fixed;
+	u32 vco;
+	u32 chk_shift;
+	u32 temp;
+	u32 temp_upper_bound;
+	u32 temp_lower_bound;
+	u32 tzone_high_temp;
+	u32 tzone_high_temp_offset;
+	u32 tzone_low_temp;
+	u32 tzone_low_temp_offset;
+	u32 core_sel;
+	u32 opp_count;
+	u32 int_st;
+	u32 sw_id;
+	u32 ctl0;
+	u32 cpu_id;
+};
+
+static u32 percent(u32 numerator, u32 denominator)
+{
+	/* If not divide 1000, "numerator * 100" will have data overflow. */
+	numerator /= 1000;
+	denominator /= 1000;
+
+	return DIV_ROUND_UP(numerator * 100, denominator);
+}
+
+static u32 svs_readl(struct svs_platform *svsp, enum svs_reg_index rg_i)
+{
+	return readl(svsp->base + svsp->regs[rg_i]);
+}
+
+static void svs_writel(struct svs_platform *svsp, u32 val,
+		       enum svs_reg_index rg_i)
+{
+	writel(val, svsp->base + svsp->regs[rg_i]);
+}
+
+static void svs_switch_bank(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+
+	svs_writel(svsp, svsb->core_sel, CORESEL);
+}
+
+static u32 svs_bank_volt_to_opp_volt(u32 svsb_volt, u32 svsb_volt_step,
+				     u32 svsb_volt_base)
+{
+	return (svsb_volt * svsb_volt_step) + svsb_volt_base;
+}
+
+static int svs_get_bank_zone_temperature(const char *tzone_name,
+					 int *tzone_temp)
+{
+	struct thermal_zone_device *tzd;
+
+	tzd = thermal_zone_get_zone_by_name(tzone_name);
+	if (IS_ERR(tzd))
+		return PTR_ERR(tzd);
+
+	return thermal_zone_get_temp(tzd, tzone_temp);
+}
+
+static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool force_update)
+{
+	int tzone_temp = 0, ret = -EPERM;
+	u32 i, svsb_volt, opp_volt, temp_offset = 0;
+
+	mutex_lock(&svsb->lock);
+
+	/*
+	 * If svs bank is suspended, it means signed-off voltages are applied.
+	 * Don't need to update opp voltage anymore.
+	 */
+	if (svsb->suspended && !force_update) {
+		dev_notice(svsb->dev, "bank is suspended\n");
+		ret = -EPERM;
+		goto unlock_mutex;
+	}
+
+	/* Get thermal effect */
+	if (svsb->phase == SVSB_PHASE_MON) {
+		if (svsb->temp > svsb->temp_upper_bound &&
+		    svsb->temp < svsb->temp_lower_bound) {
+			dev_warn(svsb->dev, "svsb temp = 0x%x?\n", svsb->temp);
+			ret = -EINVAL;
+			goto unlock_mutex;
+		}
+
+		ret = svs_get_bank_zone_temperature(svsb->tzone_name,
+						    &tzone_temp);
+		if (ret) {
+			dev_err(svsb->dev, "no %s? (%d), run default volts\n",
+				svsb->tzone_name, ret);
+			svsb->phase = SVSB_PHASE_ERROR;
+		}
+
+		if (tzone_temp >= svsb->tzone_high_temp)
+			temp_offset += svsb->tzone_high_temp_offset;
+		else if (tzone_temp <= svsb->tzone_low_temp)
+			temp_offset += svsb->tzone_low_temp_offset;
+	}
+
+	/* vmin <= svsb_volt (opp_volt) <= signed-off (default) voltage */
+	for (i = 0; i < svsb->opp_count; i++) {
+		if (svsb->phase == SVSB_PHASE_MON) {
+			svsb_volt = max(svsb->volts[i] + svsb->volt_offset +
+					temp_offset, svsb->vmin);
+			opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
+							     svsb->volt_step,
+							     svsb->volt_base);
+		} else if (svsb->phase == SVSB_PHASE_INIT02) {
+			svsb_volt = max(svsb->volts[i] + svsb->volt_offset,
+					svsb->vmin);
+			opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
+							     svsb->volt_step,
+							     svsb->volt_base);
+		} else if (svsb->phase == SVSB_PHASE_ERROR) {
+			opp_volt = svsb->opp_volts[i];
+		} else {
+			dev_err(svsb->dev, "unknown phase: %u?\n", svsb->phase);
+			ret = -EINVAL;
+			goto unlock_mutex;
+		}
+
+		opp_volt = min(opp_volt, svsb->opp_volts[i]);
+		ret = dev_pm_opp_adjust_voltage(svsb->opp_dev,
+						svsb->opp_freqs[i],
+						opp_volt, opp_volt,
+						svsb->opp_volts[i]);
+		if (ret) {
+			dev_err(svsb->dev, "set voltage fail: %d\n", ret);
+			goto unlock_mutex;
+		}
+	}
+
+unlock_mutex:
+	mutex_unlock(&svsb->lock);
+
+	return ret;
+}
+
+static u32 interpolate(u32 f0, u32 f1, u32 v0, u32 v1, u32 fx)
+{
+	u32 vx;
+
+	if (v0 == v1 || f0 == f1)
+		return v0;
+
+	/* *100 to have decimal fraction factor */
+	vx = (v0 * 100) - ((((v0 - v1) * 100) / (f0 - f1)) * (f0 - fx));
+
+	return DIV_ROUND_UP(vx, 100);
+}
+
+static void svs_get_vops_v2(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+	u32 temp, i;
+
+	if (svsb->phase == SVSB_PHASE_MON &&
+	    svsb->volt_flags & SVSB_MON_VOLT_IGNORE)
+		return;
+
+	temp = svs_readl(svsp, VOP74);
+	svsb->volts[14] = (temp >> 24) & GENMASK(7, 0);
+	svsb->volts[12] = (temp >> 16) & GENMASK(7, 0);
+	svsb->volts[10] = (temp >> 8)  & GENMASK(7, 0);
+	svsb->volts[8] = (temp & GENMASK(7, 0));
+
+	temp = svs_readl(svsp, VOP30);
+	svsb->volts[6] = (temp >> 24) & GENMASK(7, 0);
+	svsb->volts[4] = (temp >> 16) & GENMASK(7, 0);
+	svsb->volts[2] = (temp >> 8)  & GENMASK(7, 0);
+	svsb->volts[0] = (temp & GENMASK(7, 0));
+
+	for (i = 0; i <= 12; i += 2)
+		svsb->volts[i + 1] =
+			interpolate(svsb->freqs_pct[i],
+				    svsb->freqs_pct[i + 2],
+				    svsb->volts[i],
+				    svsb->volts[i + 2],
+				    svsb->freqs_pct[i + 1]);
+
+	svsb->volts[15] =
+		interpolate(svsb->freqs_pct[12],
+			    svsb->freqs_pct[14],
+			    svsb->volts[12],
+			    svsb->volts[14],
+			    svsb->freqs_pct[15]);
+
+	if (svsb->volt_flags & SVSB_INIT02_RM_DVTFIXED)
+		for (i = 0; i < svsb->opp_count; i++)
+			svsb->volts[i] -= svsb->dvt_fixed;
+}
+
+static void svs_set_freqs_pct_v2(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+
+	svs_writel(svsp,
+		   (svsb->freqs_pct[14] << 24) |
+		   (svsb->freqs_pct[12] << 16) |
+		   (svsb->freqs_pct[10] << 8) |
+		   svsb->freqs_pct[8],
+		   FREQPCT74);
+
+	svs_writel(svsp,
+		   (svsb->freqs_pct[6] << 24) |
+		   (svsb->freqs_pct[4] << 16) |
+		   (svsb->freqs_pct[2] << 8) |
+		   svsb->freqs_pct[0],
+		   FREQPCT30);
+}
+
+static void svs_set_bank_phase(struct svs_platform *svsp,
+			       enum svsb_phase target_phase)
+{
+	struct svs_bank *svsb = svsp->pbank;
+	u32 des_char, temp_char, det_char, limit_vals;
+	u32 init2vals, ts_calcs, val, filter, i;
+
+	svs_switch_bank(svsp);
+
+	des_char = (svsb->bdes << 8) | svsb->mdes;
+	svs_writel(svsp, des_char, DESCHAR);
+
+	temp_char = (svsb->vco << 16) | (svsb->mtdes << 8) | svsb->dvt_fixed;
+	svs_writel(svsp, temp_char, TEMPCHAR);
+
+	det_char = (svsb->dcbdet << 8) | svsb->dcmdet;
+	svs_writel(svsp, det_char, DETCHAR);
+
+	svs_writel(svsp, svsb->dc_config, DCCONFIG);
+	svs_writel(svsp, svsb->age_config, AGECONFIG);
+
+	if (!svsb->agem) {
+		svs_writel(svsp, SVSB_RUNCONFIG_DEFAULT, RUNCONFIG);
+	} else {
+		val = 0x0;
+
+		for (i = 0; i < 24; i += 2) {
+			filter = 0x3 << i;
+
+			if (!(svsb->age_config & filter))
+				val |= (0x1 << i);
+			else
+				val |= (svsb->age_config & filter);
+		}
+		svs_writel(svsp, val, RUNCONFIG);
+	}
+
+	svsb->set_freqs_pct(svsp);
+
+	limit_vals = (svsb->vmax << 24) | (svsb->vmin << 16) |
+		     (svsb->dthi << 8) | svsb->dtlo;
+	svs_writel(svsp, limit_vals, LIMITVALS);
+	svs_writel(svsp, svsb->vboot, VBOOT);
+	svs_writel(svsp, svsb->det_window, DETWINDOW);
+	svs_writel(svsp, svsb->det_max, CONFIG);
+
+	if (svsb->chk_shift)
+		svs_writel(svsp, svsb->chk_shift, CHKSHIFT);
+
+	if (svsb->ctl0)
+		svs_writel(svsp, svsb->ctl0, CTL0);
+
+	svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
+
+	switch (target_phase) {
+	case SVSB_PHASE_INIT01:
+		svs_writel(svsp, SVSB_INTEN_INIT0x, INTEN);
+		svs_writel(svsp, SVSB_EN_INIT01, SVSEN);
+		break;
+	case SVSB_PHASE_INIT02:
+		svs_writel(svsp, SVSB_INTEN_INIT0x, INTEN);
+		init2vals = (svsb->age_voffset_in << 16) | svsb->dc_voffset_in;
+		svs_writel(svsp, init2vals, INIT2VALS);
+		svs_writel(svsp, SVSB_EN_INIT02, SVSEN);
+		break;
+	case SVSB_PHASE_MON:
+		ts_calcs = (svsb->bts << 12) | svsb->mts;
+		svs_writel(svsp, ts_calcs, TSCALCS);
+		svs_writel(svsp, SVSB_INTEN_MONVOPEN, INTEN);
+		svs_writel(svsp, SVSB_EN_MON, SVSEN);
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+}
+
+static inline void svs_init01_isr_handler(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+
+	dev_info(svsb->dev, "%s: VDN74~30:0x%08x~0x%08x, DC:0x%08x\n",
+		 __func__, svs_readl(svsp, VDESIGN74),
+		 svs_readl(svsp, VDESIGN30), svs_readl(svsp, DCVALUES));
+
+	svsb->phase = SVSB_PHASE_INIT01;
+	svsb->dc_voffset_in = ~(svs_readl(svsp, DCVALUES) & GENMASK(15, 0)) + 1;
+	if (svsb->volt_flags & SVSB_INIT01_VOLT_IGNORE ||
+	    (svsb->dc_voffset_in & SVSB_DC_SIGNED_BIT &&
+	     svsb->volt_flags & SVSB_INIT01_VOLT_INC_ONLY))
+		svsb->dc_voffset_in = 0;
+
+	svsb->age_voffset_in = svs_readl(svsp, AGEVALUES) & GENMASK(15, 0);
+
+	svs_writel(svsp, SVSB_EN_OFF, SVSEN);
+	svs_writel(svsp, SVSB_INTSTS_COMPLETE, INTSTS);
+
+	/* svs init01 clock gating */
+	svsb->core_sel &= ~SVSB_DET_CLK_EN;
+}
+
+static inline void svs_init02_isr_handler(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+
+	dev_info(svsb->dev, "%s: VOP74~30:0x%08x~0x%08x, DC:0x%08x\n",
+		 __func__, svs_readl(svsp, VOP74), svs_readl(svsp, VOP30),
+		 svs_readl(svsp, DCVALUES));
+
+	svsb->phase = SVSB_PHASE_INIT02;
+	svsb->get_vops(svsp);
+
+	svs_writel(svsp, SVSB_EN_OFF, SVSEN);
+	svs_writel(svsp, SVSB_INTSTS_COMPLETE, INTSTS);
+}
+
+static inline void svs_mon_mode_isr_handler(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+
+	svsb->phase = SVSB_PHASE_MON;
+	svsb->temp = svs_readl(svsp, TEMP) & GENMASK(7, 0);
+	svsb->get_vops(svsp);
+
+	svs_writel(svsp, SVSB_INTSTS_MONVOP, INTSTS);
+}
+
+static inline void svs_error_isr_handler(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+
+	dev_err(svsb->dev, "%s: CORESEL = 0x%08x\n",
+		__func__, svs_readl(svsp, CORESEL));
+	dev_err(svsb->dev, "SVSEN = 0x%08x, INTSTS = 0x%08x\n",
+		svs_readl(svsp, SVSEN), svs_readl(svsp, INTSTS));
+	dev_err(svsb->dev, "SMSTATE0 = 0x%08x, SMSTATE1 = 0x%08x\n",
+		svs_readl(svsp, SMSTATE0), svs_readl(svsp, SMSTATE1));
+	dev_err(svsb->dev, "TEMP = 0x%08x\n", svs_readl(svsp, TEMP));
+
+	svsb->mode_support = SVSB_MODE_ALL_DISABLE;
+	svsb->phase = SVSB_PHASE_ERROR;
+
+	svs_writel(svsp, SVSB_EN_OFF, SVSEN);
+	svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
+}
+
+static irqreturn_t svs_isr(int irq, void *data)
+{
+	struct svs_platform *svsp = data;
+	struct svs_bank *svsb = NULL;
+	unsigned long flags;
+	u32 idx, int_sts, svs_en;
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+		WARN_ON(!svsb);
+
+		spin_lock_irqsave(&mtk_svs_lock, flags);
+		svsp->pbank = svsb;
+
+		/* Find out which svs bank fires interrupt */
+		if (svsb->int_st & svs_readl(svsp, INTST)) {
+			spin_unlock_irqrestore(&mtk_svs_lock, flags);
+			continue;
+		}
+
+		if (!svsb->suspended) {
+			svs_switch_bank(svsp);
+			int_sts = svs_readl(svsp, INTSTS);
+			svs_en = svs_readl(svsp, SVSEN) & SVSB_EN_MASK;
+
+			if (int_sts == SVSB_INTSTS_COMPLETE &&
+			    svs_en == SVSB_EN_INIT01)
+				svs_init01_isr_handler(svsp);
+			else if (int_sts == SVSB_INTSTS_COMPLETE &&
+				 svs_en == SVSB_EN_INIT02)
+				svs_init02_isr_handler(svsp);
+			else if (int_sts & SVSB_INTSTS_MONVOP)
+				svs_mon_mode_isr_handler(svsp);
+			else
+				svs_error_isr_handler(svsp);
+		}
+
+		spin_unlock_irqrestore(&mtk_svs_lock, flags);
+		break;
+	}
+
+	if (svsb->phase != SVSB_PHASE_INIT01)
+		svs_adjust_pm_opp_volts(svsb, false);
+
+	if (svsb->phase == SVSB_PHASE_INIT01 ||
+	    svsb->phase == SVSB_PHASE_INIT02)
+		complete(&svsb->init_completion);
+
+	return IRQ_HANDLED;
+}
+
+static void svs_mon_mode(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	unsigned long flags;
+	u32 idx;
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (!(svsb->mode_support & SVSB_MODE_MON))
+			continue;
+
+		spin_lock_irqsave(&mtk_svs_lock, flags);
+		svsp->pbank = svsb;
+		svs_set_bank_phase(svsp, SVSB_PHASE_MON);
+		spin_unlock_irqrestore(&mtk_svs_lock, flags);
+	}
+}
+
+static int svs_init02(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	unsigned long flags, time_left;
+	u32 idx;
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (!(svsb->mode_support & SVSB_MODE_INIT02))
+			continue;
+
+		reinit_completion(&svsb->init_completion);
+		spin_lock_irqsave(&mtk_svs_lock, flags);
+		svsp->pbank = svsb;
+		svs_set_bank_phase(svsp, SVSB_PHASE_INIT02);
+		spin_unlock_irqrestore(&mtk_svs_lock, flags);
+
+		time_left =
+			wait_for_completion_timeout(&svsb->init_completion,
+						    msecs_to_jiffies(5000));
+		if (!time_left) {
+			dev_err(svsb->dev, "init02 completion timeout\n");
+			return -EBUSY;
+		}
+	}
+
+	return 0;
+}
+
+static int svs_init01(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	struct pm_qos_request *qos_request;
+	unsigned long flags, time_left;
+	bool search_done;
+	int ret = 0;
+	u32 opp_freqs, opp_vboot, buck_volt, idx, i;
+
+	qos_request = kzalloc(sizeof(*qos_request), GFP_KERNEL);
+	if (!qos_request)
+		return -ENOMEM;
+
+	/* Let CPUs leave idle-off state for initializing svs_init01. */
+	cpu_latency_qos_add_request(qos_request, 0);
+
+	/*
+	 * Sometimes two svs banks use the same buck.
+	 * Therefore, we set each svs bank to vboot voltage first.
+	 */
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (!(svsb->mode_support & SVSB_MODE_INIT01))
+			continue;
+
+		search_done = false;
+
+		if (svsb->pd_req) {
+			ret = regulator_enable(svsb->buck);
+			if (ret) {
+				dev_err(svsb->dev, "%s enable fail: %d\n",
+					svsb->buck_name, ret);
+				goto init01_finish;
+			}
+
+			if (!pm_runtime_enabled(svsb->pd_dev)) {
+				pm_runtime_enable(svsb->pd_dev);
+				svsb->enable_pm_runtime_ever = true;
+			}
+
+			ret = pm_runtime_get_sync(svsb->pd_dev);
+			if (ret < 0) {
+				dev_err(svsb->dev, "mtcmos on fail: %d\n", ret);
+				goto init01_finish;
+			}
+		}
+
+		if (regulator_set_mode(svsb->buck, REGULATOR_MODE_FAST))
+			dev_notice(svsb->dev, "set fast mode fail\n");
+
+		/*
+		 * Find the fastest freq that can be run at vboot and
+		 * fix to that freq until svs_init01 is done.
+		 */
+		opp_vboot = svs_bank_volt_to_opp_volt(svsb->vboot,
+						      svsb->volt_step,
+						      svsb->volt_base);
+
+		for (i = 0; i < svsb->opp_count; i++) {
+			opp_freqs = svsb->opp_freqs[i];
+			if (!search_done && svsb->opp_volts[i] <= opp_vboot) {
+				ret = dev_pm_opp_adjust_voltage(svsb->opp_dev,
+								opp_freqs,
+								opp_vboot,
+								opp_vboot,
+								opp_vboot);
+				if (ret) {
+					dev_err(svsb->dev,
+						"set voltage fail: %d\n", ret);
+					goto init01_finish;
+				}
+
+				search_done = true;
+			} else {
+				dev_pm_opp_disable(svsb->opp_dev,
+						   svsb->opp_freqs[i]);
+			}
+		}
+	}
+
+	/* svs bank init01 begins */
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (!(svsb->mode_support & SVSB_MODE_INIT01))
+			continue;
+
+		opp_vboot = svs_bank_volt_to_opp_volt(svsb->vboot,
+						      svsb->volt_step,
+						      svsb->volt_base);
+
+		buck_volt = regulator_get_voltage(svsb->buck);
+		if (buck_volt != opp_vboot) {
+			dev_err(svsb->dev,
+				"buck voltage: %u, expected vboot: %u\n",
+				buck_volt, opp_vboot);
+			ret = -EPERM;
+			goto init01_finish;
+		}
+
+		spin_lock_irqsave(&mtk_svs_lock, flags);
+		svsp->pbank = svsb;
+		svs_set_bank_phase(svsp, SVSB_PHASE_INIT01);
+		spin_unlock_irqrestore(&mtk_svs_lock, flags);
+
+		time_left =
+			wait_for_completion_timeout(&svsb->init_completion,
+						    msecs_to_jiffies(5000));
+		if (!time_left) {
+			dev_err(svsb->dev, "init01 completion timeout\n");
+			ret = -EBUSY;
+			goto init01_finish;
+		}
+	}
+
+init01_finish:
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (!(svsb->mode_support & SVSB_MODE_INIT01))
+			continue;
+
+		for (i = 0; i < svsb->opp_count; i++)
+			dev_pm_opp_enable(svsb->opp_dev, svsb->opp_freqs[i]);
+
+		if (regulator_set_mode(svsb->buck, REGULATOR_MODE_NORMAL))
+			dev_notice(svsb->dev, "fail to set normal mode\n");
+
+		if (svsb->pd_req) {
+			if (pm_runtime_put_sync(svsb->pd_dev))
+				dev_err(svsb->dev, "mtcmos off fail\n");
+
+			if (svsb->enable_pm_runtime_ever) {
+				pm_runtime_disable(svsb->pd_dev);
+				svsb->enable_pm_runtime_ever = false;
+			}
+
+			if (regulator_disable(svsb->buck))
+				dev_err(svsb->dev, "%s disable fail: %d\n",
+					svsb->buck_name, ret);
+		}
+	}
+
+	cpu_latency_qos_remove_request(qos_request);
+	kfree(qos_request);
+
+	return ret;
+}
+
+static int svs_start(struct svs_platform *svsp)
+{
+	int ret;
+
+	ret = svs_init01(svsp);
+	if (ret)
+		return ret;
+
+	ret = svs_init02(svsp);
+	if (ret)
+		return ret;
+
+	svs_mon_mode(svsp);
+
+	return 0;
+}
+
+static struct device *svs_get_subsys_device(struct svs_platform *svsp,
+					    const char *node_name)
+{
+	struct platform_device *pdev;
+	struct device_node *np;
+
+	np = of_find_node_by_name(NULL, node_name);
+	if (!np) {
+		dev_err(svsp->dev, "cannot find %s node\n", node_name);
+		return ERR_PTR(-ENODEV);
+	}
+
+	pdev = of_find_device_by_node(np);
+	if (!pdev) {
+		of_node_put(np);
+		dev_err(svsp->dev, "cannot find pdev by %s\n", node_name);
+		return ERR_PTR(-ENXIO);
+	}
+
+	of_node_put(np);
+
+	return &pdev->dev;
+}
+
+static struct device *svs_add_device_link(struct svs_platform *svsp,
+					  const char *node_name)
+{
+	struct device *dev;
+	struct device_link *sup_link;
+
+	if (!node_name) {
+		dev_err(svsp->dev, "node name cannot be null\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	dev = svs_get_subsys_device(svsp, node_name);
+	if (IS_ERR(dev))
+		return dev;
+
+	sup_link = device_link_add(svsp->dev, dev,
+				   DL_FLAG_AUTOREMOVE_CONSUMER);
+	if (!sup_link) {
+		dev_err(svsp->dev, "sup_link is NULL\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (sup_link->supplier->links.status != DL_DEV_DRIVER_BOUND)
+		return ERR_PTR(-EPROBE_DEFER);
+
+	return dev;
+}
+
+static int svs_resource_setup(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	struct dev_pm_opp *opp;
+	unsigned long freq;
+	int count, ret;
+	u32 idx, i;
+
+	dev_set_drvdata(svsp->dev, svsp);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		switch (svsb->sw_id) {
+		case SVSB_CPU_LITTLE:
+			svsb->name = "SVSB_CPU_LITTLE";
+			break;
+		case SVSB_CPU_BIG:
+			svsb->name = "SVSB_CPU_BIG";
+			break;
+		case SVSB_CCI:
+			svsb->name = "SVSB_CCI";
+			break;
+		case SVSB_GPU:
+			svsb->name = "SVSB_GPU";
+			break;
+		default:
+			WARN_ON(1);
+			return -EINVAL;
+		}
+
+		svsb->dev = devm_kzalloc(svsp->dev, sizeof(*svsb->dev),
+					 GFP_KERNEL);
+		if (!svsb->dev)
+			return -ENOMEM;
+
+		ret = dev_set_name(svsb->dev, "%s", svsb->name);
+		if (ret)
+			return ret;
+
+		dev_set_drvdata(svsb->dev, svsp);
+
+		ret = dev_pm_opp_of_add_table(svsb->opp_dev);
+		if (ret) {
+			dev_err(svsb->dev, "add opp table fail: %d\n", ret);
+			return ret;
+		}
+
+		mutex_init(&svsb->lock);
+		init_completion(&svsb->init_completion);
+
+		svsb->buck = devm_regulator_get_optional(svsb->opp_dev,
+							 svsb->buck_name);
+		if (IS_ERR(svsb->buck)) {
+			dev_err(svsb->dev, "cannot get \"%s-supply\"\n",
+				svsb->buck_name);
+			return PTR_ERR(svsb->buck);
+		}
+
+		count = dev_pm_opp_get_opp_count(svsb->opp_dev);
+		if (svsb->opp_count != count) {
+			dev_err(svsb->dev,
+				"opp_count not \"%u\" but get \"%d\"?\n",
+				svsb->opp_count, count);
+			return count;
+		}
+
+		for (i = 0, freq = U32_MAX; i < svsb->opp_count; i++, freq--) {
+			opp = dev_pm_opp_find_freq_floor(svsb->opp_dev, &freq);
+			if (IS_ERR(opp)) {
+				dev_err(svsb->dev, "cannot find freq = %ld\n",
+					PTR_ERR(opp));
+				return PTR_ERR(opp);
+			}
+
+			svsb->opp_freqs[i] = freq;
+			svsb->opp_volts[i] = dev_pm_opp_get_voltage(opp);
+			svsb->freqs_pct[i] = percent(svsb->opp_freqs[i],
+						     svsb->freq_base);
+			dev_pm_opp_put(opp);
+		}
+	}
+
+	return 0;
+}
+
+static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
+{
+	struct thermal_parameter tp;
+	struct svs_bank *svsb;
+	bool mon_mode_support = true;
+	int format[6], x_roomt[6], tb_roomt = 0;
+	struct nvmem_cell *cell;
+	u32 idx, i, ft_pgm, mts, temp0, temp1, temp2;
+
+	for (i = 0; i < svsp->efuse_num; i++)
+		if (svsp->efuse[i])
+			dev_info(svsp->dev, "M_HW_RES%d: 0x%08x\n",
+				 i, svsp->efuse[i]);
+
+	/* Svs efuse parsing */
+	ft_pgm = (svsp->efuse[0] >> 4) & GENMASK(3, 0);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (ft_pgm <= 1)
+			svsb->volt_flags |= SVSB_INIT01_VOLT_IGNORE;
+
+		switch (svsb->sw_id) {
+		case SVSB_CPU_LITTLE:
+			svsb->bdes = svsp->efuse[16] & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[16] >> 8) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[16] >> 16) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[16] >> 24) & GENMASK(7, 0);
+			svsb->mtdes  = (svsp->efuse[17] >> 16) & GENMASK(7, 0);
+
+			if (ft_pgm <= 3)
+				svsb->volt_offset += 10;
+			else
+				svsb->volt_offset += 2;
+			break;
+		case SVSB_CPU_BIG:
+			svsb->bdes = svsp->efuse[18] & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[18] >> 8) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[18] >> 16) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[18] >> 24) & GENMASK(7, 0);
+			svsb->mtdes  = svsp->efuse[17] & GENMASK(7, 0);
+
+			if (ft_pgm <= 3)
+				svsb->volt_offset += 15;
+			else
+				svsb->volt_offset += 12;
+			break;
+		case SVSB_CCI:
+			svsb->bdes = svsp->efuse[4] & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[4] >> 8) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[4] >> 16) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[4] >> 24) & GENMASK(7, 0);
+			svsb->mtdes  = (svsp->efuse[5] >> 16) & GENMASK(7, 0);
+
+			if (ft_pgm <= 3)
+				svsb->volt_offset += 10;
+			else
+				svsb->volt_offset += 2;
+			break;
+		case SVSB_GPU:
+			svsb->bdes = svsp->efuse[6] & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[6] >> 8) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[6] >> 16) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[6] >> 24) & GENMASK(7, 0);
+			svsb->mtdes  = svsp->efuse[5] & GENMASK(7, 0);
+
+			if (ft_pgm >= 2) {
+				svsb->freq_base = 800000000; /* 800MHz */
+				svsb->dvt_fixed = 2;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* Get thermal efuse by nvmem */
+	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
+	if (IS_ERR_OR_NULL(cell)) {
+		dev_err(svsp->dev, "no thermal cell, no mon mode\n");
+		for (idx = 0; idx < svsp->bank_num; idx++) {
+			svsb = &svsp->banks[idx];
+			svsb->mode_support &= ~SVSB_MODE_MON;
+		}
+
+		return true;
+	}
+
+	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_num);
+	svsp->tefuse_num /= sizeof(u32);
+	nvmem_cell_put(cell);
+
+	/* Thermal efuse parsing */
+	tp.adc_ge_t = (svsp->tefuse[1] >> 22) & GENMASK(9, 0);
+	tp.adc_oe_t = (svsp->tefuse[1] >> 12) & GENMASK(9, 0);
+
+	tp.o_vtsmcu1 = (svsp->tefuse[0] >> 17) & GENMASK(8, 0);
+	tp.o_vtsmcu2 = (svsp->tefuse[0] >> 8) & GENMASK(8, 0);
+	tp.o_vtsmcu3 = svsp->tefuse[1] & GENMASK(8, 0);
+	tp.o_vtsmcu4 = (svsp->tefuse[2] >> 23) & GENMASK(8, 0);
+	tp.o_vtsmcu5 = (svsp->tefuse[2] >> 5) & GENMASK(8, 0);
+	tp.o_vtsabb = (svsp->tefuse[2] >> 14) & GENMASK(8, 0);
+
+	tp.degc_cali = (svsp->tefuse[0] >> 1) & GENMASK(5, 0);
+	tp.adc_cali_en_t = svsp->tefuse[0] & BIT(0);
+	tp.o_slope_sign = (svsp->tefuse[0] >> 7) & BIT(0);
+
+	tp.ts_id = (svsp->tefuse[1] >> 9) & BIT(0);
+	tp.o_slope = (svsp->tefuse[0] >> 26) & GENMASK(5, 0);
+
+	if (tp.adc_cali_en_t == 1) {
+		if (!tp.ts_id)
+			tp.o_slope = 0;
+
+		if (tp.adc_ge_t < 265 || tp.adc_ge_t > 758 ||
+		    tp.adc_oe_t < 265 || tp.adc_oe_t > 758 ||
+		    tp.o_vtsmcu1 < -8 || tp.o_vtsmcu1 > 484 ||
+		    tp.o_vtsmcu2 < -8 || tp.o_vtsmcu2 > 484 ||
+		    tp.o_vtsmcu3 < -8 || tp.o_vtsmcu3 > 484 ||
+		    tp.o_vtsmcu4 < -8 || tp.o_vtsmcu4 > 484 ||
+		    tp.o_vtsmcu5 < -8 || tp.o_vtsmcu5 > 484 ||
+		    tp.o_vtsabb < -8 || tp.o_vtsabb > 484 ||
+		    tp.degc_cali < 1 || tp.degc_cali > 63) {
+			dev_err(svsp->dev, "bad thermal efuse, no mon mode\n");
+			mon_mode_support = false;
+		}
+	} else {
+		dev_err(svsp->dev, "no thermal efuse, no mon mode\n");
+		mon_mode_support = false;
+	}
+
+	if (!mon_mode_support) {
+		for (idx = 0; idx < svsp->bank_num; idx++) {
+			svsb = &svsp->banks[idx];
+			svsb->mode_support &= ~SVSB_MODE_MON;
+		}
+
+		return true;
+	}
+
+	tp.ge = ((tp.adc_ge_t - 512) * 10000) / 4096;
+	tp.oe = (tp.adc_oe_t - 512);
+	tp.gain = (10000 + tp.ge);
+
+	format[0] = (tp.o_vtsmcu1 + 3350 - tp.oe);
+	format[1] = (tp.o_vtsmcu2 + 3350 - tp.oe);
+	format[2] = (tp.o_vtsmcu3 + 3350 - tp.oe);
+	format[3] = (tp.o_vtsmcu4 + 3350 - tp.oe);
+	format[4] = (tp.o_vtsmcu5 + 3350 - tp.oe);
+	format[5] = (tp.o_vtsabb + 3350 - tp.oe);
+
+	for (i = 0; i < 6; i++)
+		x_roomt[i] = (((format[i] * 10000) / 4096) * 10000) / tp.gain;
+
+	temp0 = (10000 * 100000 / tp.gain) * 15 / 18;
+
+	if (!tp.o_slope_sign)
+		mts = (temp0 * 10) / (1534 + tp.o_slope * 10);
+	else
+		mts = (temp0 * 10) / (1534 - tp.o_slope * 10);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+		svsb->mts = mts;
+
+		switch (svsb->sw_id) {
+		case SVSB_CPU_LITTLE:
+			tb_roomt = x_roomt[3];
+			break;
+		case SVSB_CPU_BIG:
+			tb_roomt = x_roomt[4];
+			break;
+		case SVSB_CCI:
+			tb_roomt = x_roomt[3];
+			break;
+		case SVSB_GPU:
+			tb_roomt = x_roomt[1];
+			break;
+		default:
+			break;
+		}
+
+		temp0 = (tp.degc_cali * 10 / 2);
+		temp1 = ((10000 * 100000 / 4096 / tp.gain) *
+			 tp.oe + tb_roomt * 10) * 15 / 18;
+
+		if (!tp.o_slope_sign)
+			temp2 = temp1 * 100 / (1534 + tp.o_slope * 10);
+		else
+			temp2 = temp1 * 100 / (1534 - tp.o_slope * 10);
+
+		svsb->bts = (temp0 + temp2 - 250) * 4 / 10;
+	}
+
+	return true;
+}
+
+static bool svs_is_supported(struct svs_platform *svsp)
+{
+	struct nvmem_cell *cell;
+
+	/* Get svs efuse by nvmem */
+	cell = nvmem_cell_get(svsp->dev, "svs-calibration-data");
+	if (IS_ERR_OR_NULL(cell)) {
+		dev_err(svsp->dev,
+			"no \"svs-calibration-data\" from dts? disable svs\n");
+		return false;
+	}
+
+	svsp->efuse = nvmem_cell_read(cell, &svsp->efuse_num);
+	svsp->efuse_num /= sizeof(u32);
+	nvmem_cell_put(cell);
+
+	if (!svsp->efuse[svsp->efuse_check]) {
+		dev_err(svsp->dev, "svs_efuse[%u] = 0x%x?\n",
+			svsp->efuse_check, svsp->efuse[svsp->efuse_check]);
+		return false;
+	}
+
+	return svsp->efuse_parsing(svsp);
+}
+
+static int svs_suspend(struct device *dev)
+{
+	struct svs_platform *svsp = dev_get_drvdata(dev);
+	struct svs_bank *svsb;
+	unsigned long flags;
+	int ret;
+	u32 idx;
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		/* Wait if svs_isr() is still in process. */
+		spin_lock_irqsave(&mtk_svs_lock, flags);
+		svsp->pbank = svsb;
+		svs_switch_bank(svsp);
+		svs_writel(svsp, SVSB_EN_OFF, SVSEN);
+		svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
+		spin_unlock_irqrestore(&mtk_svs_lock, flags);
+
+		svsb->suspended = true;
+		if (svsb->phase != SVSB_PHASE_INIT01) {
+			svsb->phase = SVSB_PHASE_ERROR;
+			svs_adjust_pm_opp_volts(svsb, true);
+		}
+	}
+
+	if (svsp->rst) {
+		ret = reset_control_assert(svsp->rst);
+		if (ret) {
+			dev_err(svsp->dev, "cannot assert reset %d\n", ret);
+			return ret;
+		}
+	}
+
+	clk_disable_unprepare(svsp->main_clk);
+
+	return 0;
+}
+
+static int svs_resume(struct device *dev)
+{
+	struct svs_platform *svsp = dev_get_drvdata(dev);
+	struct svs_bank *svsb;
+	int ret;
+	u32 idx;
+
+	ret = clk_prepare_enable(svsp->main_clk);
+	if (ret) {
+		dev_err(svsp->dev, "cannot enable main_clk, disable svs\n");
+		return ret;
+	}
+
+	if (svsp->rst) {
+		ret = reset_control_deassert(svsp->rst);
+		if (ret) {
+			dev_err(svsp->dev, "cannot deassert reset %d\n", ret);
+			return ret;
+		}
+	}
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+		svsb->suspended = false;
+	}
+
+	ret = svs_init02(svsp);
+	if (ret)
+		return ret;
+
+	svs_mon_mode(svsp);
+
+	return 0;
+}
+
+static struct svs_bank svs_mt8183_banks[] = {
+	{
+		.sw_id			= SVSB_CPU_LITTLE,
+		.set_freqs_pct		= svs_set_freqs_pct_v2,
+		.get_vops		= svs_get_vops_v2,
+		.cpu_id			= 0,
+		.tzone_name		= "tzts4",
+		.buck_name		= "proc",
+		.pd_req			= false,
+		.volt_flags		= SVSB_INIT01_VOLT_INC_ONLY,
+		.mode_support		= SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
+		.opp_count		= 16,
+		.freq_base		= 1989000000,
+		.vboot			= 0x30,
+		.volt_step		= 6250,
+		.volt_base		= 500000,
+		.volt_offset		= 0,
+		.vmax			= 0x64,
+		.vmin			= 0x18,
+		.dthi			= 0x1,
+		.dtlo			= 0xfe,
+		.det_window		= 0xa28,
+		.det_max		= 0xffff,
+		.age_config		= 0x555555,
+		.agem			= 0,
+		.dc_config		= 0x555555,
+		.dvt_fixed		= 0x7,
+		.vco			= 0x10,
+		.chk_shift		= 0x77,
+		.temp_upper_bound	= 0x64,
+		.temp_lower_bound	= 0xb2,
+		.tzone_high_temp	= SVSB_TZONE_HIGH_TEMP_MAX,
+		.tzone_low_temp		= 25000,
+		.tzone_low_temp_offset	= 0,
+		.core_sel		= 0x8fff0000,
+		.int_st			= BIT(0),
+		.ctl0			= 0x00010001,
+	},
+	{
+		.sw_id			= SVSB_CPU_BIG,
+		.set_freqs_pct		= svs_set_freqs_pct_v2,
+		.get_vops		= svs_get_vops_v2,
+		.cpu_id			= 4,
+		.tzone_name		= "tzts5",
+		.buck_name		= "proc",
+		.pd_req			= false,
+		.volt_flags		= SVSB_INIT01_VOLT_INC_ONLY,
+		.mode_support		= SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
+		.opp_count		= 16,
+		.freq_base		= 1989000000,
+		.vboot			= 0x30,
+		.volt_step		= 6250,
+		.volt_base		= 500000,
+		.volt_offset		= 0,
+		.vmax			= 0x58,
+		.vmin			= 0x10,
+		.dthi			= 0x1,
+		.dtlo			= 0xfe,
+		.det_window		= 0xa28,
+		.det_max		= 0xffff,
+		.age_config		= 0x555555,
+		.agem			= 0,
+		.dc_config		= 0x555555,
+		.dvt_fixed		= 0x7,
+		.vco			= 0x10,
+		.chk_shift		= 0x77,
+		.temp_upper_bound	= 0x64,
+		.temp_lower_bound	= 0xb2,
+		.tzone_high_temp	= SVSB_TZONE_HIGH_TEMP_MAX,
+		.tzone_low_temp		= 25000,
+		.tzone_low_temp_offset	= 0,
+		.core_sel		= 0x8fff0001,
+		.int_st			= BIT(1),
+		.ctl0			= 0x00000001,
+	},
+	{
+		.sw_id			= SVSB_CCI,
+		.set_freqs_pct		= svs_set_freqs_pct_v2,
+		.get_vops		= svs_get_vops_v2,
+		.tzone_name		= "tzts4",
+		.buck_name		= "proc",
+		.pd_req			= false,
+		.volt_flags		= SVSB_INIT01_VOLT_INC_ONLY,
+		.mode_support		= SVSB_MODE_INIT01 | SVSB_MODE_INIT02,
+		.opp_count		= 16,
+		.freq_base		= 1196000000,
+		.vboot			= 0x30,
+		.volt_step		= 6250,
+		.volt_base		= 500000,
+		.volt_offset		= 0,
+		.vmax			= 0x64,
+		.vmin			= 0x18,
+		.dthi			= 0x1,
+		.dtlo			= 0xfe,
+		.det_window		= 0xa28,
+		.det_max		= 0xffff,
+		.age_config		= 0x555555,
+		.agem			= 0,
+		.dc_config		= 0x555555,
+		.dvt_fixed		= 0x7,
+		.vco			= 0x10,
+		.chk_shift		= 0x77,
+		.temp_upper_bound	= 0x64,
+		.temp_lower_bound	= 0xb2,
+		.tzone_high_temp	= SVSB_TZONE_HIGH_TEMP_MAX,
+		.tzone_low_temp		= 25000,
+		.tzone_low_temp_offset	= 0,
+		.core_sel		= 0x8fff0002,
+		.int_st			= BIT(2),
+		.ctl0			= 0x00100003,
+	},
+	{
+		.sw_id			= SVSB_GPU,
+		.set_freqs_pct		= svs_set_freqs_pct_v2,
+		.get_vops		= svs_get_vops_v2,
+		.tzone_name		= "tzts2",
+		.buck_name		= "mali",
+		.pd_req			= true,
+		.volt_flags		= SVSB_INIT01_VOLT_INC_ONLY,
+		.mode_support		= SVSB_MODE_INIT01 | SVSB_MODE_INIT02 |
+					  SVSB_MODE_MON,
+		.opp_count		= 16,
+		.freq_base		= 900000000,
+		.vboot			= 0x30,
+		.volt_step		= 6250,
+		.volt_base		= 500000,
+		.volt_offset		= 0,
+		.vmax			= 0x40,
+		.vmin			= 0x14,
+		.dthi			= 0x1,
+		.dtlo			= 0xfe,
+		.det_window		= 0xa28,
+		.det_max		= 0xffff,
+		.age_config		= 0x555555,
+		.agem			= 0,
+		.dc_config		= 0x555555,
+		.dvt_fixed		= 0x3,
+		.vco			= 0x10,
+		.chk_shift		= 0x77,
+		.temp_upper_bound	= 0x64,
+		.temp_lower_bound	= 0xb2,
+		.tzone_high_temp	= SVSB_TZONE_HIGH_TEMP_MAX,
+		.tzone_low_temp		= 25000,
+		.tzone_low_temp_offset	= 3,
+		.core_sel		= 0x8fff0003,
+		.int_st			= BIT(3),
+		.ctl0			= 0x00050001,
+	},
+};
+
+static int svs_get_svs_mt8183_platform_data(struct svs_platform *svsp)
+{
+	struct device *dev;
+	struct svs_bank *svsb;
+	u32 idx;
+
+	svsp->name = "mt8183-svs";
+	svsp->banks = svs_mt8183_banks;
+	svsp->efuse_parsing = svs_mt8183_efuse_parsing;
+	svsp->regs = svs_regs_v2;
+	svsp->irqflags = IRQF_TRIGGER_LOW | IRQF_ONESHOT;
+	svsp->rst = NULL;
+	svsp->bank_num = ARRAY_SIZE(svs_mt8183_banks);
+	svsp->efuse_check = 2;
+
+	dev = svs_add_device_link(svsp, "thermal");
+	if (IS_ERR(dev))
+		return PTR_ERR(dev);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		switch (svsb->sw_id) {
+		case SVSB_CPU_LITTLE:
+		case SVSB_CPU_BIG:
+			svsb->opp_dev = get_cpu_device(svsb->cpu_id);
+			break;
+		case SVSB_CCI:
+			svsb->opp_dev = svs_add_device_link(svsp, "cci");
+			break;
+		case SVSB_GPU:
+			svsb->opp_dev = svs_add_device_link(svsp, "mali");
+			svsb->pd_dev = svs_add_device_link(svsp,
+							   "mali_gpu_core2");
+			if (IS_ERR(svsb->pd_dev))
+				return PTR_ERR(svsb->pd_dev);
+			break;
+		default:
+			WARN_ON(1);
+			return -EINVAL;
+		}
+
+		if (IS_ERR(svsb->opp_dev))
+			return PTR_ERR(svsb->opp_dev);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id mtk_svs_of_match[] = {
+	{
+		.compatible = "mediatek,mt8183-svs",
+		.data = &svs_get_svs_mt8183_platform_data,
+	}, {
+		/* Sentinel */
+	},
+};
+
+static int svs_probe(struct platform_device *pdev)
+{
+	int (*svs_get_svs_platform_data)(struct svs_platform *svsp);
+	struct svs_platform *svsp;
+	unsigned int svsp_irq;
+	int ret;
+
+	svsp = devm_kzalloc(&pdev->dev, sizeof(*svsp), GFP_KERNEL);
+	if (!svsp)
+		return -ENOMEM;
+
+	svs_get_svs_platform_data = of_device_get_match_data(&pdev->dev);
+	if (!svs_get_svs_platform_data) {
+		dev_err(svsp->dev, "no svs platform data? why?\n");
+		return -EPERM;
+	}
+
+	svsp->dev = &pdev->dev;
+	ret = svs_get_svs_platform_data(svsp);
+	if (ret) {
+		dev_err_probe(svsp->dev, ret, "fail to get svsp data\n");
+		return ret;
+	}
+
+	if (!svs_is_supported(svsp)) {
+		dev_notice(svsp->dev, "svs is not supported\n");
+		return -EPERM;
+	}
+
+	ret = svs_resource_setup(svsp);
+	if (ret) {
+		dev_err(svsp->dev, "svs resource setup fail: %d\n", ret);
+		return ret;
+	}
+
+	svsp_irq = irq_of_parse_and_map(svsp->dev->of_node, 0);
+	ret = devm_request_threaded_irq(svsp->dev, svsp_irq, NULL, svs_isr,
+					svsp->irqflags, svsp->name, svsp);
+	if (ret) {
+		dev_err(svsp->dev, "register irq(%d) failed: %d\n",
+			svsp_irq, ret);
+		return ret;
+	}
+
+	svsp->main_clk = devm_clk_get(svsp->dev, "main");
+	if (IS_ERR(svsp->main_clk)) {
+		dev_err(svsp->dev, "failed to get clock: %ld\n",
+			PTR_ERR(svsp->main_clk));
+		return PTR_ERR(svsp->main_clk);
+	}
+
+	ret = clk_prepare_enable(svsp->main_clk);
+	if (ret) {
+		dev_err(svsp->dev, "cannot enable main clk: %d\n", ret);
+		return ret;
+	}
+
+	svsp->base = of_iomap(svsp->dev->of_node, 0);
+	if (IS_ERR_OR_NULL(svsp->base)) {
+		dev_err(svsp->dev, "cannot find svs register base\n");
+		ret = -EINVAL;
+		goto svs_probe_clk_disable;
+	}
+
+	ret = svs_start(svsp);
+	if (ret) {
+		dev_err(svsp->dev, "svs start fail: %d\n", ret);
+		goto svs_probe_iounmap;
+	}
+
+	return 0;
+
+svs_probe_iounmap:
+	iounmap(svsp->base);
+
+svs_probe_clk_disable:
+	clk_disable_unprepare(svsp->main_clk);
+
+	return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(svs_pm_ops, svs_suspend, svs_resume);
+
+static struct platform_driver svs_driver = {
+	.probe	= svs_probe,
+	.driver	= {
+		.name		= "mtk-svs",
+		.pm		= &svs_pm_ops,
+		.of_match_table	= of_match_ptr(mtk_svs_of_match),
+	},
+};
+
+module_platform_driver(svs_driver);
+
+MODULE_AUTHOR("Roger Lu <roger.lu@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek SVS driver");
+MODULE_LICENSE("GPL v2");
-- 
2.18.0
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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[Guenter Roeck]

On Wed, Apr 28, 2021 at 02:54:36PM +0800, Roger Lu wrote:
> 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.
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>  drivers/soc/mediatek/Kconfig   |   10 +
>  drivers/soc/mediatek/Makefile  |    1 +
>  drivers/soc/mediatek/mtk-svs.c | 1723 ++++++++++++++++++++++++++++++++
>  3 files changed, 1734 insertions(+)
>  create mode 100644 drivers/soc/mediatek/mtk-svs.c
> 
[ ... ]

> +
> +	svsp_irq = irq_of_parse_and_map(svsp->dev->of_node, 0);
> +	ret = devm_request_threaded_irq(svsp->dev, svsp_irq, NULL, svs_isr,
> +					svsp->irqflags, svsp->name, svsp);

0-day reports:

drivers/soc/mediatek/mtk-svs.c:1663:7-32: ERROR:
	Threaded IRQ with no primary handler requested without IRQF_ONESHOT

I would be a bit concerned about this. There is no primary (hard)
interrupt handler, meaning the hard interrupt may be re-enabled after
the default hard interrupt handler runs. This might result in endless
interrupts.

Guenter

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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[Roger Lu]

Hi Guenter,

Sorry for the late reply and thanks for the notice.

On Wed, 2021-05-05 at 21:51 -0700, Guenter Roeck wrote:
> On Wed, Apr 28, 2021 at 02:54:36PM +0800, Roger Lu wrote:
> > 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.
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > ---
> >  drivers/soc/mediatek/Kconfig   |   10 +
> >  drivers/soc/mediatek/Makefile  |    1 +
> >  drivers/soc/mediatek/mtk-svs.c | 1723
> > ++++++++++++++++++++++++++++++++
> >  3 files changed, 1734 insertions(+)
> >  create mode 100644 drivers/soc/mediatek/mtk-svs.c
> > 
> 
> [ ... ]
> 
> > +
> > +	svsp_irq = irq_of_parse_and_map(svsp->dev->of_node, 0);
> > +	ret = devm_request_threaded_irq(svsp->dev, svsp_irq, NULL,
> > svs_isr,
> > +					svsp->irqflags, svsp->name,
> > svsp);
> 
> 0-day reports:
> 
> drivers/soc/mediatek/mtk-svs.c:1663:7-32: ERROR:
> 	Threaded IRQ with no primary handler requested without
> IRQF_ONESHOT
> 
> I would be a bit concerned about this. There is no primary (hard)
> interrupt handler, meaning the hard interrupt may be re-enabled after
> the default hard interrupt handler runs. This might result in endless
> interrupts.

Oh, we add IRQF_ONESHOT in "svs_get_svs_mt8183_platform_data()" for
threaded irq. So, please kindly let us know if we need to set more
flags or any other potential risks we should be aware. Thanks in
advance.

> 
> Guenter
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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[Guenter Roeck]

On 5/13/21 8:10 PM, Roger Lu wrote:
> Hi Guenter,
> 
> Sorry for the late reply and thanks for the notice.
> 
> On Wed, 2021-05-05 at 21:51 -0700, Guenter Roeck wrote:
>> On Wed, Apr 28, 2021 at 02:54:36PM +0800, Roger Lu wrote:
>>> 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.
>>>
>>> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
>>> ---
>>>   drivers/soc/mediatek/Kconfig   |   10 +
>>>   drivers/soc/mediatek/Makefile  |    1 +
>>>   drivers/soc/mediatek/mtk-svs.c | 1723
>>> ++++++++++++++++++++++++++++++++
>>>   3 files changed, 1734 insertions(+)
>>>   create mode 100644 drivers/soc/mediatek/mtk-svs.c
>>>
>>
>> [ ... ]
>>
>>> +
>>> +	svsp_irq = irq_of_parse_and_map(svsp->dev->of_node, 0);
>>> +	ret = devm_request_threaded_irq(svsp->dev, svsp_irq, NULL,
>>> svs_isr,
>>> +					svsp->irqflags, svsp->name,
>>> svsp);
>>
>> 0-day reports:
>>
>> drivers/soc/mediatek/mtk-svs.c:1663:7-32: ERROR:
>> 	Threaded IRQ with no primary handler requested without
>> IRQF_ONESHOT
>>
>> I would be a bit concerned about this. There is no primary (hard)
>> interrupt handler, meaning the hard interrupt may be re-enabled after
>> the default hard interrupt handler runs. This might result in endless
>> interrupts.
> 
> Oh, we add IRQF_ONESHOT in "svs_get_svs_mt8183_platform_data()" for
> threaded irq. So, please kindly let us know if we need to set more
> flags or any other potential risks we should be aware. Thanks in
> advance.
> 

After reviewing the code, I think this was actually a false alarm,
at least if svsp->irqflags always includes IRQF_ONESHOT.
The code is kind of unusual, though. Unless I am missing something,
svsp->irqflags is only set in one place and it is always set
to IRQF_TRIGGER_LOW | IRQF_ONESHOT. If there is a remote chance
that the flag is ever different, it would have been better (and less
confusing) to specify IRQF_ONESHOT directly when requesting the
interrupt (because it is always needed, no matter which SOC).
If the flags are always the same, there is no reason for having
the svsp->irqflags variable in the first place.

Thanks,
Guenter

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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[Roger Lu]

On Thu, 2021-05-13 at 20:33 -0700, Guenter Roeck wrote:
> On 5/13/21 8:10 PM, Roger Lu wrote:
> > Hi Guenter,
> > 
> > Sorry for the late reply and thanks for the notice.
> > 
> > On Wed, 2021-05-05 at 21:51 -0700, Guenter Roeck wrote:
> > > On Wed, Apr 28, 2021 at 02:54:36PM +0800, Roger Lu wrote:
> > > > 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.
> > > > 
> > > > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > > > ---
> > > >   drivers/soc/mediatek/Kconfig   |   10 +
> > > >   drivers/soc/mediatek/Makefile  |    1 +
> > > >   drivers/soc/mediatek/mtk-svs.c | 1723
> > > > ++++++++++++++++++++++++++++++++
> > > >   3 files changed, 1734 insertions(+)
> > > >   create mode 100644 drivers/soc/mediatek/mtk-svs.c
> > > > 
> > > 
> > > [ ... ]
> > > 
> > > > +
> > > > +	svsp_irq = irq_of_parse_and_map(svsp->dev->of_node, 0);
> > > > +	ret = devm_request_threaded_irq(svsp->dev, svsp_irq,
> > > > NULL,
> > > > svs_isr,
> > > > +					svsp->irqflags, svsp-
> > > > >name,
> > > > svsp);
> > > 
> > > 0-day reports:
> > > 
> > > drivers/soc/mediatek/mtk-svs.c:1663:7-32: ERROR:
> > > 	Threaded IRQ with no primary handler requested without
> > > IRQF_ONESHOT
> > > 
> > > I would be a bit concerned about this. There is no primary (hard)
> > > interrupt handler, meaning the hard interrupt may be re-enabled
> > > after
> > > the default hard interrupt handler runs. This might result in
> > > endless
> > > interrupts.
> > 
> > Oh, we add IRQF_ONESHOT in "svs_get_svs_mt8183_platform_data()" for
> > threaded irq. So, please kindly let us know if we need to set more
> > flags or any other potential risks we should be aware. Thanks in
> > advance.
> > 
> 
> After reviewing the code, I think this was actually a false alarm,
> at least if svsp->irqflags always includes IRQF_ONESHOT.
> The code is kind of unusual, though. Unless I am missing something,
> svsp->irqflags is only set in one place and it is always set
> to IRQF_TRIGGER_LOW | IRQF_ONESHOT. If there is a remote chance
> that the flag is ever different, it would have been better (and less
> confusing) to specify IRQF_ONESHOT directly when requesting the
> interrupt (because it is always needed, no matter which SOC).
> If the flags are always the same, there is no reason for having
> the svsp->irqflags variable in the first place.

Thanks for the advice. We still need svsp->irqflags for customizing
different SoC requirement as [1] and I'll specify IRQF_ONESHOT directly
as [2] in the next version.

[1]
mt8183 setting: svsp->irqflags = IRQF_TRIGGER_LOW | IRQF_ONESHOT;
mt8192 setting: svsp->irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
https://lore.kernel.org/patchwork/patch/1419309/ (mt8192)

[2]
ret = devm_request_threaded_irq(svsp->dev, svsp_irq, NULL, svs_isr,
				svsp->irqflags | IRQF_ONESHOT,
				svsp->name, svsp);
> 
> Thanks,
> Guenter
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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[AngeloGioacchino Del Regno]

Il 28/04/21 08:54, Roger Lu ha scritto:
> 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.
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>   drivers/soc/mediatek/Kconfig   |   10 +
>   drivers/soc/mediatek/Makefile  |    1 +
>   drivers/soc/mediatek/mtk-svs.c | 1723 ++++++++++++++++++++++++++++++++
>   3 files changed, 1734 insertions(+)
>   create mode 100644 drivers/soc/mediatek/mtk-svs.c
> 
> diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
> index fdd8bc08569e..3c3eedea35f7 100644
> --- a/drivers/soc/mediatek/Kconfig
> +++ b/drivers/soc/mediatek/Kconfig
> @@ -73,4 +73,14 @@ config MTK_MMSYS
>   	  Say yes here to add support for the MediaTek Multimedia
>   	  Subsystem (MMSYS).
>   
> +config MTK_SVS
> +	tristate "MediaTek Smart Voltage Scaling(SVS)"
> +	depends on MTK_EFUSE && NVMEM
> +	help
> +	  The Smart Voltage Scaling(SVS) engine is a piece of hardware
> +	  which has several controllers(banks) for calculating suitable
> +	  voltage to different power domains(CPU/GPU/CCI) according to
> +	  chip process corner, temperatures and other factors. Then DVFS
> +	  driver could apply SVS bank voltage to PMIC/Buck.
> +
>   endmenu
> diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
> index 90270f8114ed..0e9e703c931a 100644
> --- a/drivers/soc/mediatek/Makefile
> +++ b/drivers/soc/mediatek/Makefile
> @@ -7,3 +7,4 @@ obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
>   obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) += mtk-pm-domains.o
>   obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
>   obj-$(CONFIG_MTK_MMSYS) += mtk-mutex.o
> +obj-$(CONFIG_MTK_SVS) += mtk-svs.o
> diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
> new file mode 100644
> index 000000000000..2d2153c92373
> --- /dev/null
> +++ b/drivers/soc/mediatek/mtk-svs.c
> @@ -0,0 +1,1723 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/clk.h>
> +#include <linux/completion.h>
> +#include <linux/device.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/kthread.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/nvmem-consumer.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_domain.h>
> +#include <linux/pm_opp.h>
> +#include <linux/pm_qos.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/reset.h>
> +#include <linux/slab.h>
> +#include <linux/spinlock.h>
> +#include <linux/thermal.h>
> +
> +/* svs bank 1-line sw id */
> +#define SVSB_CPU_LITTLE			BIT(0)
> +#define SVSB_CPU_BIG			BIT(1)
> +#define SVSB_CCI			BIT(2)
> +#define SVSB_GPU			BIT(3)
> +
> +/* svs bank mode support */
> +#define SVSB_MODE_ALL_DISABLE		0
> +#define SVSB_MODE_INIT01		BIT(1)
> +#define SVSB_MODE_INIT02		BIT(2)
> +#define SVSB_MODE_MON			BIT(3)
> +
> +/* svs bank volt flags */
> +#define SVSB_INIT01_VOLT_IGNORE		BIT(1)
> +#define SVSB_INIT01_VOLT_INC_ONLY	BIT(2)
> +#define SVSB_INIT02_RM_DVTFIXED		BIT(8)
> +#define SVSB_MON_VOLT_IGNORE		BIT(16)
> +
> +/* svs bank common setting */
> +#define SVSB_DET_CLK_EN			BIT(31)
> +#define SVSB_TZONE_HIGH_TEMP_MAX	U32_MAX
> +#define SVSB_RUNCONFIG_DEFAULT		0x80000000
> +#define SVSB_DC_SIGNED_BIT		0x8000
> +#define SVSB_INTEN_INIT0x		0x00005f01
> +#define SVSB_INTEN_MONVOPEN		0x00ff0000
> +#define SVSB_EN_OFF			0x0
> +#define SVSB_EN_MASK			0x7
> +#define SVSB_EN_INIT01			0x1
> +#define SVSB_EN_INIT02			0x5
> +#define SVSB_EN_MON			0x2
> +#define SVSB_INTSTS_MONVOP		0x00ff0000
> +#define SVSB_INTSTS_COMPLETE		0x1
> +#define SVSB_INTSTS_CLEAN		0x00ffffff
> +
> +static DEFINE_SPINLOCK(mtk_svs_lock);
> +
> +/*

Thanks for using kernel-doc!! However, to be proper, this has to be
/**
  * ..........

> + * enum svsb_phase - svs bank phase enumeration
> + * @SVSB_PHASE_INIT01: basic init for svs bank
> + * @SVSB_PHASE_INIT02: svs bank can provide voltages
> + * @SVSB_PHASE_MON: svs bank can provide voltages with thermal effect
> + * @SVSB_PHASE_ERROR: svs bank encounters unexpected condition

Please move @SVSB_PHASE_ERROR before @SVSB_PHASE_INIT01: the order
is important here, and has to be the same as the actual enumeration.

> + *
> + * Each svs bank has its own independent phase. We enable each svs bank by
> + * running their phase orderly. However, When svs bank encounters unexpected
> + * condition, it will fire an irq (PHASE_ERROR) to inform svs software.
> + *
> + * svs bank general phase-enabled order:
> + * SVSB_PHASE_INIT01 -> SVSB_PHASE_INIT02 -> SVSB_PHASE_MON
> + */
> +enum svsb_phase {
> +	SVSB_PHASE_ERROR = 0,
> +	SVSB_PHASE_INIT01,
> +	SVSB_PHASE_INIT02,
> +	SVSB_PHASE_MON,
> +};
> +
> +enum svs_reg_index {
> +	DESCHAR = 0,
> +	TEMPCHAR,
> +	DETCHAR,
> +	AGECHAR,
> +	DCCONFIG,
> +	AGECONFIG,
> +	FREQPCT30,
> +	FREQPCT74,
> +	LIMITVALS,
> +	VBOOT,
> +	DETWINDOW,
> +	CONFIG,
> +	TSCALCS,
> +	RUNCONFIG,
> +	SVSEN,
> +	INIT2VALS,
> +	DCVALUES,
> +	AGEVALUES,
> +	VOP30,
> +	VOP74,
> +	TEMP,
> +	INTSTS,
> +	INTSTSRAW,
> +	INTEN,
> +	CHKINT,
> +	CHKSHIFT,
> +	STATUS,
> +	VDESIGN30,
> +	VDESIGN74,
> +	DVT30,
> +	DVT74,
> +	AGECOUNT,
> +	SMSTATE0,
> +	SMSTATE1,
> +	CTL0,
> +	DESDETSEC,
> +	TEMPAGESEC,
> +	CTRLSPARE0,
> +	CTRLSPARE1,
> +	CTRLSPARE2,
> +	CTRLSPARE3,
> +	CORESEL,
> +	THERMINTST,
> +	INTST,
> +	THSTAGE0ST,
> +	THSTAGE1ST,
> +	THSTAGE2ST,
> +	THAHBST0,
> +	THAHBST1,
> +	SPARE0,
> +	SPARE1,
> +	SPARE2,
> +	SPARE3,
> +	THSLPEVEB,
> +};
> +
> +static const u32 svs_regs_v2[] = {
> +	[DESCHAR]		= 0xc00,
> +	[TEMPCHAR]		= 0xc04,
> +	[DETCHAR]		= 0xc08,
> +	[AGECHAR]		= 0xc0c,
> +	[DCCONFIG]		= 0xc10,
> +	[AGECONFIG]		= 0xc14,
> +	[FREQPCT30]		= 0xc18,
> +	[FREQPCT74]		= 0xc1c,
> +	[LIMITVALS]		= 0xc20,
> +	[VBOOT]			= 0xc24,
> +	[DETWINDOW]		= 0xc28,
> +	[CONFIG]		= 0xc2c,
> +	[TSCALCS]		= 0xc30,
> +	[RUNCONFIG]		= 0xc34,
> +	[SVSEN]			= 0xc38,
> +	[INIT2VALS]		= 0xc3c,
> +	[DCVALUES]		= 0xc40,
> +	[AGEVALUES]		= 0xc44,
> +	[VOP30]			= 0xc48,
> +	[VOP74]			= 0xc4c,
> +	[TEMP]			= 0xc50,
> +	[INTSTS]		= 0xc54,
> +	[INTSTSRAW]		= 0xc58,
> +	[INTEN]			= 0xc5c,
> +	[CHKINT]		= 0xc60,
> +	[CHKSHIFT]		= 0xc64,
> +	[STATUS]		= 0xc68,
> +	[VDESIGN30]		= 0xc6c,
> +	[VDESIGN74]		= 0xc70,
> +	[DVT30]			= 0xc74,
> +	[DVT74]			= 0xc78,
> +	[AGECOUNT]		= 0xc7c,
> +	[SMSTATE0]		= 0xc80,
> +	[SMSTATE1]		= 0xc84,
> +	[CTL0]			= 0xc88,
> +	[DESDETSEC]		= 0xce0,
> +	[TEMPAGESEC]		= 0xce4,
> +	[CTRLSPARE0]		= 0xcf0,
> +	[CTRLSPARE1]		= 0xcf4,
> +	[CTRLSPARE2]		= 0xcf8,
> +	[CTRLSPARE3]		= 0xcfc,
> +	[CORESEL]		= 0xf00,
> +	[THERMINTST]		= 0xf04,
> +	[INTST]			= 0xf08,
> +	[THSTAGE0ST]		= 0xf0c,
> +	[THSTAGE1ST]		= 0xf10,
> +	[THSTAGE2ST]		= 0xf14,
> +	[THAHBST0]		= 0xf18,
> +	[THAHBST1]		= 0xf1c,
> +	[SPARE0]		= 0xf20,
> +	[SPARE1]		= 0xf24,
> +	[SPARE2]		= 0xf28,
> +	[SPARE3]		= 0xf2c,
> +	[THSLPEVEB]		= 0xf30,
> +};
> +
> +/*
> + * struct thermal_parameter - This is for storing thermal efuse data.
> + * We calculate thermal efuse data to produce "mts" and "bts" for
> + * svs bank mon mode.
> + */
> +struct thermal_parameter {
> +	int adc_ge_t;
> +	int adc_oe_t;
> +	int ge;
> +	int oe;
> +	int gain;
> +	int o_vtsabb;
> +	int o_vtsmcu1;
> +	int o_vtsmcu2;
> +	int o_vtsmcu3;
> +	int o_vtsmcu4;
> +	int o_vtsmcu5;
> +	int degc_cali;
> +	int adc_cali_en_t;
> +	int o_slope;
> +	int o_slope_sign;
> +	int ts_id;
> +};
> +
> +/*

Same here, use /**

> + * struct svs_platform - svs platform data
> + * @dev: svs platform device
> + * @base: svs platform register address base
> + * @main_clk: main clock for svs bank
> + * @pbank: phandle of svs bank and needs to be protected by spin_lock
> + * @banks: phandle of the banks that support
> + * @efuse_parsing: phandle of efuse parsing function
> + * @irqflags: irq settings flags
> + * @rst: svs reset control
> + * @regs: phandle to the registers map
> + * @efuse_num: the total number of svs platform efuse
> + * @tefuse_num: the total number of thermal efuse
> + * @bank_num: the total number of banks
> + * @efuse_check: the svs efuse check index
> + * @efuse: svs platform efuse data received from NVMEM framework
> + * @tefuse: thermal efuse data received from NVMEM framework
> + * @name: svs platform name
> + */
> +struct svs_platform {
> +	struct device *dev;
> +	void __iomem *base;
> +	struct clk *main_clk;
> +	struct svs_bank *pbank;
> +	struct svs_bank *banks;
> +	bool (*efuse_parsing)(struct svs_platform *svsp);
> +	unsigned long irqflags;
> +	struct reset_control *rst;
> +	const u32 *regs;
> +	char *name;
> +	size_t efuse_num;
> +	size_t tefuse_num;
> +	u32 bank_num;
> +	u32 efuse_check;
> +	u32 *efuse;
> +	u32 *tefuse;
> +};
> +
> +/*

ditto.

> + * struct svs_bank - svs bank representation
> + * @dev: svs bank device
> + * @opp_dev: device for opp table/buck control
> + * @pd_dev: power domain device for SoC mtcmos control
> + * @init_completion: the timeout completion for bank init
> + * @buck: phandle of the regulator
> + * @lock: mutex lock to protect voltage update process
> + * @phase: bank current phase
> + * @name: bank name
> + * @tzone_name: thermal zone name
> + * @buck_name: regulator name
> + * @suspended: suspend flag of this bank
> + * @pd_req: bank's power-domain on request
> + * @enable_pm_runtime_ever: bank enables pm-runtime flag
> + * @set_freqs_pct: phandle of set frequencies percent function
> + * @get_vops: phandle of get bank voltages function
> + * @volt_offset: bank voltage offset controlled by svs software
> + * @mode_support: bank mode support.
> + * @opp_freqs: signed-off frequencies from default opp table
> + * @opp_volts: signed-off voltages from default opp table
> + * @freqs_pct: percent of "opp_freqs / freq_base" for bank init
> + * @volts: bank voltages
> + * @freq_base: reference frequency for bank init
> + * @vboot: voltage request for bank init01 stage only
> + * @volt_step: bank voltage step
> + * @volt_base: bank voltage base
> + * @volt_flags: bank voltage flags
> + * @vmax: bank voltage maximum
> + * @vmin: bank voltage minimum
> + * @temp: bank temperature
> + * @temp_upper_bound: bank temperature upper bound
> + * @temp_lower_bound: bank temperature lower bound
> + * @tzone_high_temp: thermal zone high temperature threshold
> + * @tzone_high_temp_offset: thermal zone high temperature offset
> + * @tzone_low_temp: thermal zone low temperature threshold
> + * @tzone_low_temp_offset: thermal zone low temperature offset
> + * @core_sel: bank selection
> + * @opp_count: bank opp count
> + * @int_st: bank interrupt identification
> + * @sw_id: bank software identification
> + * @ctl0: bank thermal sensor selection
> + * @cpu_id: cpu core id for SVS CPU only
> + *
> + * Other structure members which are not listed above are svs platform
> + * efuse data for bank init
> + */
> +struct svs_bank {
> +	struct device *dev;
> +	struct device *opp_dev;
> +	struct device *pd_dev;
> +	struct completion init_completion;
> +	struct regulator *buck;
> +	struct mutex lock;	/* lock to protect voltage update process */
> +	enum svsb_phase phase;
> +	char *name;
> +	char *tzone_name;
> +	char *buck_name;
> +	bool suspended;
> +	bool pd_req;
> +	bool enable_pm_runtime_ever;
> +	void (*set_freqs_pct)(struct svs_platform *svsp);
> +	void (*get_vops)(struct svs_platform *svsp);
> +	s32 volt_offset;
> +	u32 mode_support;
> +	u32 opp_freqs[16];
> +	u32 opp_volts[16];
> +	u32 freqs_pct[16];
> +	u32 volts[16];
> +	u32 freq_base;
> +	u32 vboot;
> +	u32 volt_step;
> +	u32 volt_base;
> +	u32 volt_flags;
> +	u32 vmax;
> +	u32 vmin;
> +	u32 bts;
> +	u32 mts;
> +	u32 bdes;
> +	u32 mdes;
> +	u32 mtdes;
> +	u32 dcbdet;
> +	u32 dcmdet;
> +	u32 dthi;
> +	u32 dtlo;
> +	u32 det_window;
> +	u32 det_max;
> +	u32 age_config;
> +	u32 age_voffset_in;
> +	u32 agem;
> +	u32 dc_config;
> +	u32 dc_voffset_in;
> +	u32 dvt_fixed;
> +	u32 vco;
> +	u32 chk_shift;
> +	u32 temp;
> +	u32 temp_upper_bound;
> +	u32 temp_lower_bound;
> +	u32 tzone_high_temp;
> +	u32 tzone_high_temp_offset;
> +	u32 tzone_low_temp;
> +	u32 tzone_low_temp_offset;
> +	u32 core_sel;
> +	u32 opp_count;
> +	u32 int_st;
> +	u32 sw_id;
> +	u32 ctl0;
> +	u32 cpu_id;
> +};
> +
> +static u32 percent(u32 numerator, u32 denominator)
> +{
> +	/* If not divide 1000, "numerator * 100" will have data overflow. */
> +	numerator /= 1000;
> +	denominator /= 1000;
> +
> +	return DIV_ROUND_UP(numerator * 100, denominator);
> +}
> +
> +static u32 svs_readl(struct svs_platform *svsp, enum svs_reg_index rg_i)
> +{
> +	return readl(svsp->base + svsp->regs[rg_i]);
> +}
> +
> +static void svs_writel(struct svs_platform *svsp, u32 val,
> +		       enum svs_reg_index rg_i)
> +{
> +	writel(val, svsp->base + svsp->regs[rg_i]);
> +}
> +
> +static void svs_switch_bank(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +
> +	svs_writel(svsp, svsb->core_sel, CORESEL);
> +}
> +
> +static u32 svs_bank_volt_to_opp_volt(u32 svsb_volt, u32 svsb_volt_step,
> +				     u32 svsb_volt_base)
> +{
> +	return (svsb_volt * svsb_volt_step) + svsb_volt_base;
> +}
> +
> +static int svs_get_bank_zone_temperature(const char *tzone_name,
> +					 int *tzone_temp)
> +{
> +	struct thermal_zone_device *tzd;
> +
> +	tzd = thermal_zone_get_zone_by_name(tzone_name);
> +	if (IS_ERR(tzd))
> +		return PTR_ERR(tzd);
> +
> +	return thermal_zone_get_temp(tzd, tzone_temp);
> +}
> +
> +static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool force_update)
> +{
> +	int tzone_temp = 0, ret = -EPERM;
> +	u32 i, svsb_volt, opp_volt, temp_offset = 0;
> +
> +	mutex_lock(&svsb->lock);
> +
> +	/*
> +	 * If svs bank is suspended, it means signed-off voltages are applied.
> +	 * Don't need to update opp voltage anymore.
> +	 */
> +	if (svsb->suspended && !force_update) {
> +		dev_notice(svsb->dev, "bank is suspended\n");
> +		ret = -EPERM;
> +		goto unlock_mutex;
> +	}
> +
> +	/* Get thermal effect */
> +	if (svsb->phase == SVSB_PHASE_MON) {
> +		if (svsb->temp > svsb->temp_upper_bound &&
> +		    svsb->temp < svsb->temp_lower_bound) {
> +			dev_warn(svsb->dev, "svsb temp = 0x%x?\n", svsb->temp);
> +			ret = -EINVAL;
> +			goto unlock_mutex;
> +		}
> +
> +		ret = svs_get_bank_zone_temperature(svsb->tzone_name,
> +						    &tzone_temp);
> +		if (ret) {
> +			dev_err(svsb->dev, "no %s? (%d), run default volts\n",
> +				svsb->tzone_name, ret);
> +			svsb->phase = SVSB_PHASE_ERROR;
> +		}
> +
> +		if (tzone_temp >= svsb->tzone_high_temp)
> +			temp_offset += svsb->tzone_high_temp_offset;
> +		else if (tzone_temp <= svsb->tzone_low_temp)
> +			temp_offset += svsb->tzone_low_temp_offset;
> +	}
> +
> +	/* vmin <= svsb_volt (opp_volt) <= signed-off (default) voltage */
> +	for (i = 0; i < svsb->opp_count; i++) {

What about using switch here?

		switch (svsb->phase) {
		case SVSB_PHASE_MON:
			......
			break;
		case .......:
			.........
			break;
		default:
			dev_err(......);
			ret = -EINVAL;
			goto unlock_mutex;
		}

> +		if (svsb->phase == SVSB_PHASE_MON) {
> +			svsb_volt = max(svsb->volts[i] + svsb->volt_offset +
> +					temp_offset, svsb->vmin);
> +			opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
> +							     svsb->volt_step,
> +							     svsb->volt_base);
> +		} else if (svsb->phase == SVSB_PHASE_INIT02) {
> +			svsb_volt = max(svsb->volts[i] + svsb->volt_offset,
> +					svsb->vmin);
> +			opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
> +							     svsb->volt_step,
> +							     svsb->volt_base);
> +		} else if (svsb->phase == SVSB_PHASE_ERROR) {
> +			opp_volt = svsb->opp_volts[i];
> +		} else {
> +			dev_err(svsb->dev, "unknown phase: %u?\n", svsb->phase);
> +			ret = -EINVAL;
> +			goto unlock_mutex;
> +		}
> +
> +		opp_volt = min(opp_volt, svsb->opp_volts[i]);
> +		ret = dev_pm_opp_adjust_voltage(svsb->opp_dev,
> +						svsb->opp_freqs[i],
> +						opp_volt, opp_volt,
> +						svsb->opp_volts[i]);
> +		if (ret) {
> +			dev_err(svsb->dev, "set voltage fail: %d\n", ret);
> +			goto unlock_mutex;
> +		}
> +	}
> +
> +unlock_mutex:
> +	mutex_unlock(&svsb->lock);
> +
> +	return ret;
> +}
> +
> +static u32 interpolate(u32 f0, u32 f1, u32 v0, u32 v1, u32 fx)
> +{
> +	u32 vx;
> +
> +	if (v0 == v1 || f0 == f1)
> +		return v0;
> +
> +	/* *100 to have decimal fraction factor */
> +	vx = (v0 * 100) - ((((v0 - v1) * 100) / (f0 - f1)) * (f0 - fx));
> +
> +	return DIV_ROUND_UP(vx, 100);
> +}
> +
> +static void svs_get_vops_v2(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +	u32 temp, i;
> +
> +	if (svsb->phase == SVSB_PHASE_MON &&
> +	    svsb->volt_flags & SVSB_MON_VOLT_IGNORE)
> +		return;
> +
> +	temp = svs_readl(svsp, VOP74);
> +	svsb->volts[14] = (temp >> 24) & GENMASK(7, 0);
> +	svsb->volts[12] = (temp >> 16) & GENMASK(7, 0);
> +	svsb->volts[10] = (temp >> 8)  & GENMASK(7, 0);
> +	svsb->volts[8] = (temp & GENMASK(7, 0));
> +
> +	temp = svs_readl(svsp, VOP30);
> +	svsb->volts[6] = (temp >> 24) & GENMASK(7, 0);
> +	svsb->volts[4] = (temp >> 16) & GENMASK(7, 0);
> +	svsb->volts[2] = (temp >> 8)  & GENMASK(7, 0);
> +	svsb->volts[0] = (temp & GENMASK(7, 0));
> +
> +	for (i = 0; i <= 12; i += 2)
> +		svsb->volts[i + 1] =
> +			interpolate(svsb->freqs_pct[i],
> +				    svsb->freqs_pct[i + 2],
> +				    svsb->volts[i],
> +				    svsb->volts[i + 2],
> +				    svsb->freqs_pct[i + 1]);
> +
> +	svsb->volts[15] =
> +		interpolate(svsb->freqs_pct[12],
> +			    svsb->freqs_pct[14],
> +			    svsb->volts[12],
> +			    svsb->volts[14],
> +			    svsb->freqs_pct[15]);
> +
> +	if (svsb->volt_flags & SVSB_INIT02_RM_DVTFIXED)
> +		for (i = 0; i < svsb->opp_count; i++)
> +			svsb->volts[i] -= svsb->dvt_fixed;
> +}
> +
> +static void svs_set_freqs_pct_v2(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +
> +	svs_writel(svsp,
> +		   (svsb->freqs_pct[14] << 24) |
> +		   (svsb->freqs_pct[12] << 16) |
> +		   (svsb->freqs_pct[10] << 8) |
> +		   svsb->freqs_pct[8],
> +		   FREQPCT74);
> +
> +	svs_writel(svsp,
> +		   (svsb->freqs_pct[6] << 24) |
> +		   (svsb->freqs_pct[4] << 16) |
> +		   (svsb->freqs_pct[2] << 8) |
> +		   svsb->freqs_pct[0],
> +		   FREQPCT30);
> +}
> +
> +static void svs_set_bank_phase(struct svs_platform *svsp,
> +			       enum svsb_phase target_phase)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +	u32 des_char, temp_char, det_char, limit_vals;
> +	u32 init2vals, ts_calcs, val, filter, i;
> +
> +	svs_switch_bank(svsp);
> +
> +	des_char = (svsb->bdes << 8) | svsb->mdes;
> +	svs_writel(svsp, des_char, DESCHAR);
> +
> +	temp_char = (svsb->vco << 16) | (svsb->mtdes << 8) | svsb->dvt_fixed;
> +	svs_writel(svsp, temp_char, TEMPCHAR);
> +
> +	det_char = (svsb->dcbdet << 8) | svsb->dcmdet;
> +	svs_writel(svsp, det_char, DETCHAR);
> +
> +	svs_writel(svsp, svsb->dc_config, DCCONFIG);
> +	svs_writel(svsp, svsb->age_config, AGECONFIG);
> +
> +	if (!svsb->agem) {
> +		svs_writel(svsp, SVSB_RUNCONFIG_DEFAULT, RUNCONFIG);
> +	} else {
> +		val = 0x0;

		val = 0;

> +
> +		for (i = 0; i < 24; i += 2) {
> +			filter = 0x3 << i;
> +
> +			if (!(svsb->age_config & filter))
> +				val |= (0x1 << i);

				val |= BIT(i);

> +			else
> +				val |= (svsb->age_config & filter);
> +		}
> +		svs_writel(svsp, val, RUNCONFIG);
> +	}
> +
> +	svsb->set_freqs_pct(svsp);
> +
> +	limit_vals = (svsb->vmax << 24) | (svsb->vmin << 16) |
> +		     (svsb->dthi << 8) | svsb->dtlo;
> +	svs_writel(svsp, limit_vals, LIMITVALS);
> +	svs_writel(svsp, svsb->vboot, VBOOT);
> +	svs_writel(svsp, svsb->det_window, DETWINDOW);
> +	svs_writel(svsp, svsb->det_max, CONFIG);
> +
> +	if (svsb->chk_shift)
> +		svs_writel(svsp, svsb->chk_shift, CHKSHIFT);
> +
> +	if (svsb->ctl0)
> +		svs_writel(svsp, svsb->ctl0, CTL0);
> +
> +	svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
> +
> +	switch (target_phase) {
> +	case SVSB_PHASE_INIT01:
> +		svs_writel(svsp, SVSB_INTEN_INIT0x, INTEN);
> +		svs_writel(svsp, SVSB_EN_INIT01, SVSEN);
> +		break;
> +	case SVSB_PHASE_INIT02:
> +		svs_writel(svsp, SVSB_INTEN_INIT0x, INTEN);
> +		init2vals = (svsb->age_voffset_in << 16) | svsb->dc_voffset_in;
> +		svs_writel(svsp, init2vals, INIT2VALS);
> +		svs_writel(svsp, SVSB_EN_INIT02, SVSEN);
> +		break;
> +	case SVSB_PHASE_MON:
> +		ts_calcs = (svsb->bts << 12) | svsb->mts;
> +		svs_writel(svsp, ts_calcs, TSCALCS);
> +		svs_writel(svsp, SVSB_INTEN_MONVOPEN, INTEN);
> +		svs_writel(svsp, SVSB_EN_MON, SVSEN);
> +		break;
> +	default:
> +		WARN_ON(1);

I agree about printing a big warning in kmsg here, but you can do that in a
slightly more descriptive way:

		WARN(1, "Requested unknown target phase %u", target_phase);

> +		break;
> +	}
> +}
> +
> +static inline void svs_init01_isr_handler(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +
> +	dev_info(svsb->dev, "%s: VDN74~30:0x%08x~0x%08x, DC:0x%08x\n",
> +		 __func__, svs_readl(svsp, VDESIGN74),
> +		 svs_readl(svsp, VDESIGN30), svs_readl(svsp, DCVALUES));
> +
> +	svsb->phase = SVSB_PHASE_INIT01;
> +	svsb->dc_voffset_in = ~(svs_readl(svsp, DCVALUES) & GENMASK(15, 0)) + 1;
> +	if (svsb->volt_flags & SVSB_INIT01_VOLT_IGNORE ||
> +	    (svsb->dc_voffset_in & SVSB_DC_SIGNED_BIT &&
> +	     svsb->volt_flags & SVSB_INIT01_VOLT_INC_ONLY))
> +		svsb->dc_voffset_in = 0;
> +
> +	svsb->age_voffset_in = svs_readl(svsp, AGEVALUES) & GENMASK(15, 0);
> +
> +	svs_writel(svsp, SVSB_EN_OFF, SVSEN);
> +	svs_writel(svsp, SVSB_INTSTS_COMPLETE, INTSTS);
> +
> +	/* svs init01 clock gating */
> +	svsb->core_sel &= ~SVSB_DET_CLK_EN;
> +}
> +
> +static inline void svs_init02_isr_handler(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +
> +	dev_info(svsb->dev, "%s: VOP74~30:0x%08x~0x%08x, DC:0x%08x\n",
> +		 __func__, svs_readl(svsp, VOP74), svs_readl(svsp, VOP30),
> +		 svs_readl(svsp, DCVALUES));
> +
> +	svsb->phase = SVSB_PHASE_INIT02;
> +	svsb->get_vops(svsp);
> +
> +	svs_writel(svsp, SVSB_EN_OFF, SVSEN);
> +	svs_writel(svsp, SVSB_INTSTS_COMPLETE, INTSTS);
> +}
> +
> +static inline void svs_mon_mode_isr_handler(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +
> +	svsb->phase = SVSB_PHASE_MON;
> +	svsb->temp = svs_readl(svsp, TEMP) & GENMASK(7, 0);
> +	svsb->get_vops(svsp);
> +
> +	svs_writel(svsp, SVSB_INTSTS_MONVOP, INTSTS);
> +}
> +
> +static inline void svs_error_isr_handler(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +
> +	dev_err(svsb->dev, "%s: CORESEL = 0x%08x\n",
> +		__func__, svs_readl(svsp, CORESEL));
> +	dev_err(svsb->dev, "SVSEN = 0x%08x, INTSTS = 0x%08x\n",
> +		svs_readl(svsp, SVSEN), svs_readl(svsp, INTSTS));
> +	dev_err(svsb->dev, "SMSTATE0 = 0x%08x, SMSTATE1 = 0x%08x\n",
> +		svs_readl(svsp, SMSTATE0), svs_readl(svsp, SMSTATE1));
> +	dev_err(svsb->dev, "TEMP = 0x%08x\n", svs_readl(svsp, TEMP));
> +
> +	svsb->mode_support = SVSB_MODE_ALL_DISABLE;
> +	svsb->phase = SVSB_PHASE_ERROR;
> +
> +	svs_writel(svsp, SVSB_EN_OFF, SVSEN);
> +	svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
> +}
> +
> +static irqreturn_t svs_isr(int irq, void *data)
> +{
> +	struct svs_platform *svsp = data;
> +	struct svs_bank *svsb = NULL;
> +	unsigned long flags;
> +	u32 idx, int_sts, svs_en;
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +		WARN_ON(!svsb);
> +
> +		spin_lock_irqsave(&mtk_svs_lock, flags);
> +		svsp->pbank = svsb;
> +
> +		/* Find out which svs bank fires interrupt */
> +		if (svsb->int_st & svs_readl(svsp, INTST)) {
> +			spin_unlock_irqrestore(&mtk_svs_lock, flags);
> +			continue;
> +		}
> +
> +		if (!svsb->suspended) {
> +			svs_switch_bank(svsp);
> +			int_sts = svs_readl(svsp, INTSTS);
> +			svs_en = svs_readl(svsp, SVSEN) & SVSB_EN_MASK;
> +
> +			if (int_sts == SVSB_INTSTS_COMPLETE &&
> +			    svs_en == SVSB_EN_INIT01)
> +				svs_init01_isr_handler(svsp);
> +			else if (int_sts == SVSB_INTSTS_COMPLETE &&
> +				 svs_en == SVSB_EN_INIT02)
> +				svs_init02_isr_handler(svsp);
> +			else if (int_sts & SVSB_INTSTS_MONVOP)
> +				svs_mon_mode_isr_handler(svsp);
> +			else
> +				svs_error_isr_handler(svsp);
> +		}
> +
> +		spin_unlock_irqrestore(&mtk_svs_lock, flags);
> +		break;
> +	}
> +
> +	if (svsb->phase != SVSB_PHASE_INIT01)
> +		svs_adjust_pm_opp_volts(svsb, false);
> +
> +	if (svsb->phase == SVSB_PHASE_INIT01 ||
> +	    svsb->phase == SVSB_PHASE_INIT02)
> +		complete(&svsb->init_completion);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static void svs_mon_mode(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb;
> +	unsigned long flags;
> +	u32 idx;
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (!(svsb->mode_support & SVSB_MODE_MON))
> +			continue;
> +
> +		spin_lock_irqsave(&mtk_svs_lock, flags);
> +		svsp->pbank = svsb;
> +		svs_set_bank_phase(svsp, SVSB_PHASE_MON);
> +		spin_unlock_irqrestore(&mtk_svs_lock, flags);
> +	}
> +}
> +
> +static int svs_init02(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb;
> +	unsigned long flags, time_left;
> +	u32 idx;
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (!(svsb->mode_support & SVSB_MODE_INIT02))
> +			continue;
> +
> +		reinit_completion(&svsb->init_completion);
> +		spin_lock_irqsave(&mtk_svs_lock, flags);
> +		svsp->pbank = svsb;
> +		svs_set_bank_phase(svsp, SVSB_PHASE_INIT02);
> +		spin_unlock_irqrestore(&mtk_svs_lock, flags);
> +
> +		time_left =
> +			wait_for_completion_timeout(&svsb->init_completion,
> +						    msecs_to_jiffies(5000));

There's no need to break the line... that's going to be fine:

		time_left = wait_for_completion_timeout(&svsb->init_completion,

							msecs_to_jiffies(5000));

> +		if (!time_left) {
> +			dev_err(svsb->dev, "init02 completion timeout\n");
> +			return -EBUSY;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int svs_init01(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb;
> +	struct pm_qos_request *qos_request;
> +	unsigned long flags, time_left;
> +	bool search_done;
> +	int ret = 0;
> +	u32 opp_freqs, opp_vboot, buck_volt, idx, i;
> +
> +	qos_request = kzalloc(sizeof(*qos_request), GFP_KERNEL);
> +	if (!qos_request)
> +		return -ENOMEM;
> +
> +	/* Let CPUs leave idle-off state for initializing svs_init01. */
> +	cpu_latency_qos_add_request(qos_request, 0);
> +
> +	/*
> +	 * Sometimes two svs banks use the same buck.
> +	 * Therefore, we set each svs bank to vboot voltage first.
> +	 */
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (!(svsb->mode_support & SVSB_MODE_INIT01))
> +			continue;
> +
> +		search_done = false;
> +
> +		if (svsb->pd_req) {
> +			ret = regulator_enable(svsb->buck);
> +			if (ret) {
> +				dev_err(svsb->dev, "%s enable fail: %d\n",
> +					svsb->buck_name, ret);
> +				goto init01_finish;
> +			}
> +
> +			if (!pm_runtime_enabled(svsb->pd_dev)) {
> +				pm_runtime_enable(svsb->pd_dev);
> +				svsb->enable_pm_runtime_ever = true;
> +			}
> +
> +			ret = pm_runtime_get_sync(svsb->pd_dev);
> +			if (ret < 0) {
> +				dev_err(svsb->dev, "mtcmos on fail: %d\n", ret);
> +				goto init01_finish;
> +			}
> +		}
> +
> +		if (regulator_set_mode(svsb->buck, REGULATOR_MODE_FAST))
> +			dev_notice(svsb->dev, "set fast mode fail\n");
> +
> +		/*
> +		 * Find the fastest freq that can be run at vboot and
> +		 * fix to that freq until svs_init01 is done.
> +		 */
> +		opp_vboot = svs_bank_volt_to_opp_volt(svsb->vboot,
> +						      svsb->volt_step,
> +						      svsb->volt_base);
> +
> +		for (i = 0; i < svsb->opp_count; i++) {
> +			opp_freqs = svsb->opp_freqs[i];
> +			if (!search_done && svsb->opp_volts[i] <= opp_vboot) {
> +				ret = dev_pm_opp_adjust_voltage(svsb->opp_dev,
> +								opp_freqs,
> +								opp_vboot,
> +								opp_vboot,
> +								opp_vboot);
> +				if (ret) {
> +					dev_err(svsb->dev,
> +						"set voltage fail: %d\n", ret);
> +					goto init01_finish;
> +				}
> +
> +				search_done = true;
> +			} else {
> +				dev_pm_opp_disable(svsb->opp_dev,
> +						   svsb->opp_freqs[i]);
> +			}
> +		}
> +	}
> +
> +	/* svs bank init01 begins */
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (!(svsb->mode_support & SVSB_MODE_INIT01))
> +			continue;
> +
> +		opp_vboot = svs_bank_volt_to_opp_volt(svsb->vboot,
> +						      svsb->volt_step,
> +						      svsb->volt_base);
> +
> +		buck_volt = regulator_get_voltage(svsb->buck);
> +		if (buck_volt != opp_vboot) {
> +			dev_err(svsb->dev,
> +				"buck voltage: %u, expected vboot: %u\n",
> +				buck_volt, opp_vboot);
> +			ret = -EPERM;
> +			goto init01_finish;
> +		}
> +
> +		spin_lock_irqsave(&mtk_svs_lock, flags);
> +		svsp->pbank = svsb;
> +		svs_set_bank_phase(svsp, SVSB_PHASE_INIT01);
> +		spin_unlock_irqrestore(&mtk_svs_lock, flags);
> +
> +		time_left =
> +			wait_for_completion_timeout(&svsb->init_completion,

81 columns is ok to have.

> +						    msecs_to_jiffies(5000));
> +		if (!time_left) {
> +			dev_err(svsb->dev, "init01 completion timeout\n");
> +			ret = -EBUSY;
> +			goto init01_finish;
> +		}
> +	}
> +
> +init01_finish:
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (!(svsb->mode_support & SVSB_MODE_INIT01))
> +			continue;
> +
> +		for (i = 0; i < svsb->opp_count; i++)
> +			dev_pm_opp_enable(svsb->opp_dev, svsb->opp_freqs[i]);
> +
> +		if (regulator_set_mode(svsb->buck, REGULATOR_MODE_NORMAL))
> +			dev_notice(svsb->dev, "fail to set normal mode\n");
> +
> +		if (svsb->pd_req) {
> +			if (pm_runtime_put_sync(svsb->pd_dev))
> +				dev_err(svsb->dev, "mtcmos off fail\n");
> +
> +			if (svsb->enable_pm_runtime_ever) {
> +				pm_runtime_disable(svsb->pd_dev);
> +				svsb->enable_pm_runtime_ever = false;
> +			}
> +
> +			if (regulator_disable(svsb->buck))
> +				dev_err(svsb->dev, "%s disable fail: %d\n",
> +					svsb->buck_name, ret);
> +		}
> +	}
> +
> +	cpu_latency_qos_remove_request(qos_request);
> +	kfree(qos_request);
> +
> +	return ret;
> +}
> +
> +static int svs_start(struct svs_platform *svsp)
> +{
> +	int ret;
> +
> +	ret = svs_init01(svsp);
> +	if (ret)
> +		return ret;
> +
> +	ret = svs_init02(svsp);
> +	if (ret)
> +		return ret;
> +
> +	svs_mon_mode(svsp);
> +
> +	return 0;
> +}
> +
> +static struct device *svs_get_subsys_device(struct svs_platform *svsp,
> +					    const char *node_name)
> +{
> +	struct platform_device *pdev;
> +	struct device_node *np;
> +
> +	np = of_find_node_by_name(NULL, node_name);
> +	if (!np) {
> +		dev_err(svsp->dev, "cannot find %s node\n", node_name);
> +		return ERR_PTR(-ENODEV);
> +	}
> +
> +	pdev = of_find_device_by_node(np);
> +	if (!pdev) {
> +		of_node_put(np);
> +		dev_err(svsp->dev, "cannot find pdev by %s\n", node_name);
> +		return ERR_PTR(-ENXIO);
> +	}
> +
> +	of_node_put(np);
> +
> +	return &pdev->dev;
> +}
> +
> +static struct device *svs_add_device_link(struct svs_platform *svsp,
> +					  const char *node_name)
> +{
> +	struct device *dev;
> +	struct device_link *sup_link;
> +
> +	if (!node_name) {
> +		dev_err(svsp->dev, "node name cannot be null\n");
> +		return ERR_PTR(-EINVAL);
> +	}
> +
> +	dev = svs_get_subsys_device(svsp, node_name);
> +	if (IS_ERR(dev))
> +		return dev;
> +
> +	sup_link = device_link_add(svsp->dev, dev,
> +				   DL_FLAG_AUTOREMOVE_CONSUMER);
> +	if (!sup_link) {
> +		dev_err(svsp->dev, "sup_link is NULL\n");
> +		return ERR_PTR(-EINVAL);
> +	}
> +
> +	if (sup_link->supplier->links.status != DL_DEV_DRIVER_BOUND)
> +		return ERR_PTR(-EPROBE_DEFER);
> +
> +	return dev;
> +}
> +
> +static int svs_resource_setup(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb;
> +	struct dev_pm_opp *opp;
> +	unsigned long freq;
> +	int count, ret;
> +	u32 idx, i;
> +
> +	dev_set_drvdata(svsp->dev, svsp);
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		switch (svsb->sw_id) {
> +		case SVSB_CPU_LITTLE:
> +			svsb->name = "SVSB_CPU_LITTLE";
> +			break;
> +		case SVSB_CPU_BIG:
> +			svsb->name = "SVSB_CPU_BIG";
> +			break;
> +		case SVSB_CCI:
> +			svsb->name = "SVSB_CCI";
> +			break;
> +		case SVSB_GPU:
> +			svsb->name = "SVSB_GPU";
> +			break;
> +		default:
> +			WARN_ON(1);
> +			return -EINVAL;
> +		}
> +
> +		svsb->dev = devm_kzalloc(svsp->dev, sizeof(*svsb->dev),
> +					 GFP_KERNEL);
> +		if (!svsb->dev)
> +			return -ENOMEM;
> +
> +		ret = dev_set_name(svsb->dev, "%s", svsb->name);
> +		if (ret)
> +			return ret;
> +
> +		dev_set_drvdata(svsb->dev, svsp);
> +
> +		ret = dev_pm_opp_of_add_table(svsb->opp_dev);
> +		if (ret) {
> +			dev_err(svsb->dev, "add opp table fail: %d\n", ret);
> +			return ret;
> +		}
> +
> +		mutex_init(&svsb->lock);
> +		init_completion(&svsb->init_completion);
> +
> +		svsb->buck = devm_regulator_get_optional(svsb->opp_dev,
> +							 svsb->buck_name);
> +		if (IS_ERR(svsb->buck)) {
> +			dev_err(svsb->dev, "cannot get \"%s-supply\"\n",
> +				svsb->buck_name);
> +			return PTR_ERR(svsb->buck);
> +		}
> +
> +		count = dev_pm_opp_get_opp_count(svsb->opp_dev);
> +		if (svsb->opp_count != count) {
> +			dev_err(svsb->dev,
> +				"opp_count not \"%u\" but get \"%d\"?\n",
> +				svsb->opp_count, count);
> +			return count;
> +		}
> +
> +		for (i = 0, freq = U32_MAX; i < svsb->opp_count; i++, freq--) {
> +			opp = dev_pm_opp_find_freq_floor(svsb->opp_dev, &freq);
> +			if (IS_ERR(opp)) {
> +				dev_err(svsb->dev, "cannot find freq = %ld\n",
> +					PTR_ERR(opp));
> +				return PTR_ERR(opp);
> +			}
> +
> +			svsb->opp_freqs[i] = freq;
> +			svsb->opp_volts[i] = dev_pm_opp_get_voltage(opp);
> +			svsb->freqs_pct[i] = percent(svsb->opp_freqs[i],
> +						     svsb->freq_base);
> +			dev_pm_opp_put(opp);
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
> +{
> +	struct thermal_parameter tp;
> +	struct svs_bank *svsb;
> +	bool mon_mode_support = true;
> +	int format[6], x_roomt[6], tb_roomt = 0;
> +	struct nvmem_cell *cell;
> +	u32 idx, i, ft_pgm, mts, temp0, temp1, temp2;
> +
> +	for (i = 0; i < svsp->efuse_num; i++)
> +		if (svsp->efuse[i])
> +			dev_info(svsp->dev, "M_HW_RES%d: 0x%08x\n",
> +				 i, svsp->efuse[i]);
> +
> +	/* Svs efuse parsing */
> +	ft_pgm = (svsp->efuse[0] >> 4) & GENMASK(3, 0);
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (ft_pgm <= 1)
> +			svsb->volt_flags |= SVSB_INIT01_VOLT_IGNORE;
> +
> +		switch (svsb->sw_id) {
> +		case SVSB_CPU_LITTLE:
> +			svsb->bdes = svsp->efuse[16] & GENMASK(7, 0);
> +			svsb->mdes = (svsp->efuse[16] >> 8) & GENMASK(7, 0);
> +			svsb->dcbdet = (svsp->efuse[16] >> 16) & GENMASK(7, 0);
> +			svsb->dcmdet = (svsp->efuse[16] >> 24) & GENMASK(7, 0);
> +			svsb->mtdes  = (svsp->efuse[17] >> 16) & GENMASK(7, 0);
> +
> +			if (ft_pgm <= 3)
> +				svsb->volt_offset += 10;
> +			else
> +				svsb->volt_offset += 2;
> +			break;
> +		case SVSB_CPU_BIG:
> +			svsb->bdes = svsp->efuse[18] & GENMASK(7, 0);
> +			svsb->mdes = (svsp->efuse[18] >> 8) & GENMASK(7, 0);
> +			svsb->dcbdet = (svsp->efuse[18] >> 16) & GENMASK(7, 0);
> +			svsb->dcmdet = (svsp->efuse[18] >> 24) & GENMASK(7, 0);
> +			svsb->mtdes  = svsp->efuse[17] & GENMASK(7, 0);
> +
> +			if (ft_pgm <= 3)
> +				svsb->volt_offset += 15;
> +			else
> +				svsb->volt_offset += 12;
> +			break;
> +		case SVSB_CCI:
> +			svsb->bdes = svsp->efuse[4] & GENMASK(7, 0);
> +			svsb->mdes = (svsp->efuse[4] >> 8) & GENMASK(7, 0);
> +			svsb->dcbdet = (svsp->efuse[4] >> 16) & GENMASK(7, 0);
> +			svsb->dcmdet = (svsp->efuse[4] >> 24) & GENMASK(7, 0);
> +			svsb->mtdes  = (svsp->efuse[5] >> 16) & GENMASK(7, 0);
> +
> +			if (ft_pgm <= 3)
> +				svsb->volt_offset += 10;
> +			else
> +				svsb->volt_offset += 2;
> +			break;
> +		case SVSB_GPU:
> +			svsb->bdes = svsp->efuse[6] & GENMASK(7, 0);
> +			svsb->mdes = (svsp->efuse[6] >> 8) & GENMASK(7, 0);
> +			svsb->dcbdet = (svsp->efuse[6] >> 16) & GENMASK(7, 0);
> +			svsb->dcmdet = (svsp->efuse[6] >> 24) & GENMASK(7, 0);
> +			svsb->mtdes  = svsp->efuse[5] & GENMASK(7, 0);
> +
> +			if (ft_pgm >= 2) {
> +				svsb->freq_base = 800000000; /* 800MHz */
> +				svsb->dvt_fixed = 2;
> +			}
> +			break;
> +		default:
> +			break;
> +		}
> +	}
> +
> +	/* Get thermal efuse by nvmem */
> +	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
> +	if (IS_ERR_OR_NULL(cell)) {
> +		dev_err(svsp->dev, "no thermal cell, no mon mode\n");
> +		for (idx = 0; idx < svsp->bank_num; idx++) {
> +			svsb = &svsp->banks[idx];
> +			svsb->mode_support &= ~SVSB_MODE_MON;
> +		}
> +
> +		return true;
> +	}
> +
> +	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_num);

nvmem_cell_read may return an error pointer: you have to check that.

	if (IS_ERR(svsp->tefuse))
		.........

Failing to perform this check will produce unpredictable behavior
during the parsing stage.

> +	svsp->tefuse_num /= sizeof(u32);
> +	nvmem_cell_put(cell);
> +
> +	/* Thermal efuse parsing */
> +	tp.adc_ge_t = (svsp->tefuse[1] >> 22) & GENMASK(9, 0);
> +	tp.adc_oe_t = (svsp->tefuse[1] >> 12) & GENMASK(9, 0);
> +
> +	tp.o_vtsmcu1 = (svsp->tefuse[0] >> 17) & GENMASK(8, 0);
> +	tp.o_vtsmcu2 = (svsp->tefuse[0] >> 8) & GENMASK(8, 0);
> +	tp.o_vtsmcu3 = svsp->tefuse[1] & GENMASK(8, 0);
> +	tp.o_vtsmcu4 = (svsp->tefuse[2] >> 23) & GENMASK(8, 0);
> +	tp.o_vtsmcu5 = (svsp->tefuse[2] >> 5) & GENMASK(8, 0);
> +	tp.o_vtsabb = (svsp->tefuse[2] >> 14) & GENMASK(8, 0);
> +
> +	tp.degc_cali = (svsp->tefuse[0] >> 1) & GENMASK(5, 0);
> +	tp.adc_cali_en_t = svsp->tefuse[0] & BIT(0);
> +	tp.o_slope_sign = (svsp->tefuse[0] >> 7) & BIT(0);
> +
> +	tp.ts_id = (svsp->tefuse[1] >> 9) & BIT(0);
> +	tp.o_slope = (svsp->tefuse[0] >> 26) & GENMASK(5, 0);
> +

Regards,
- Angelo



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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[Roger Lu]

Hi AngeloGioacchino,

Sorry for the late reply and thanks for all the advices.

On Thu, 2021-10-21 at 10:46 +0200, AngeloGioacchino Del Regno wrote:
> Il 28/04/21 08:54, Roger Lu ha scritto:
> > 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.
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > ---
> >   drivers/soc/mediatek/Kconfig   |   10 +
> >   drivers/soc/mediatek/Makefile  |    1 +
> >   drivers/soc/mediatek/mtk-svs.c | 1723 ++++++++++++++++++++++++++++++++
> >   3 files changed, 1734 insertions(+)
> >   create mode 100644 drivers/soc/mediatek/mtk-svs.c

[snip]

> > +/* svs bank common setting */
> > +#define SVSB_DET_CLK_EN			BIT(31)
> > +#define SVSB_TZONE_HIGH_TEMP_MAX	U32_MAX
> > +#define SVSB_RUNCONFIG_DEFAULT		0x80000000
> > +#define SVSB_DC_SIGNED_BIT		0x8000
> > +#define SVSB_INTEN_INIT0x		0x00005f01
> > +#define SVSB_INTEN_MONVOPEN		0x00ff0000
> > +#define SVSB_EN_OFF			0x0
> > +#define SVSB_EN_MASK			0x7
> > +#define SVSB_EN_INIT01			0x1
> > +#define SVSB_EN_INIT02			0x5
> > +#define SVSB_EN_MON			0x2
> > +#define SVSB_INTSTS_MONVOP		0x00ff0000
> > +#define SVSB_INTSTS_COMPLETE		0x1
> > +#define SVSB_INTSTS_CLEAN		0x00ffffff
> > +
> > +static DEFINE_SPINLOCK(mtk_svs_lock);
> > +
> > +/*
> 
> Thanks for using kernel-doc!! However, to be proper, this has to be
> /**
>   * ..........

Oh okay. Thanks. I will use /** to add multi-line comments. However, I checked
kernel doc-guide and it uses indent as below. So, I'll follow it. If I'm doing
it wrong, please correct me. Thanks a lot.
https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html

/**
 * .........

> 
> 
> > + * enum svsb_phase - svs bank phase enumeration
> > + * @SVSB_PHASE_INIT01: basic init for svs bank
> > + * @SVSB_PHASE_INIT02: svs bank can provide voltages
> > + * @SVSB_PHASE_MON: svs bank can provide voltages with thermal effect
> > + * @SVSB_PHASE_ERROR: svs bank encounters unexpected condition
> 
> Please move @SVSB_PHASE_ERROR before @SVSB_PHASE_INIT01: the order
> is important here, and has to be the same as the actual enumeration.

Sure, I'll improve it in the next version. Thanks.

> 
> > + *
> > + * Each svs bank has its own independent phase. We enable each svs bank by
> > + * running their phase orderly. However, When svs bank encounters
> > unexpected
> > + * condition, it will fire an irq (PHASE_ERROR) to inform svs software.
> > + *
> > + * svs bank general phase-enabled order:
> > + * SVSB_PHASE_INIT01 -> SVSB_PHASE_INIT02 -> SVSB_PHASE_MON
> > + */
> > +enum svsb_phase {
> > +	SVSB_PHASE_ERROR = 0,
> > +	SVSB_PHASE_INIT01,
> > +	SVSB_PHASE_INIT02,
> > +	SVSB_PHASE_MON,
> > +};
> > 
> > 

[snip]

> > +/*
> 
> Same here, use /**

Sure, I'll improve it in the next version. Thanks.

> 
> > + * struct svs_platform - svs platform data
> > + * @dev: svs platform device
> > + * @base: svs platform register address base
> > + * @main_clk: main clock for svs bank
> > + * @pbank: phandle of svs bank and needs to be protected by spin_lock
> > + * @banks: phandle of the banks that support
> > + * @efuse_parsing: phandle of efuse parsing function
> > + * @irqflags: irq settings flags
> > + * @rst: svs reset control
> > + * @regs: phandle to the registers map
> > + * @efuse_num: the total number of svs platform efuse
> > + * @tefuse_num: the total number of thermal efuse
> > + * @bank_num: the total number of banks
> > + * @efuse_check: the svs efuse check index
> > + * @efuse: svs platform efuse data received from NVMEM framework
> > + * @tefuse: thermal efuse data received from NVMEM framework
> > + * @name: svs platform name
> > + */
> > +struct svs_platform {
> > +	struct device *dev;
> > +	void __iomem *base;
> > +	struct clk *main_clk;
> > +	struct svs_bank *pbank;
> > +	struct svs_bank *banks;
> > +	bool (*efuse_parsing)(struct svs_platform *svsp);
> > +	unsigned long irqflags;
> > +	struct reset_control *rst;
> > +	const u32 *regs;
> > +	char *name;
> > +	size_t efuse_num;
> > +	size_t tefuse_num;
> > +	u32 bank_num;
> > +	u32 efuse_check;
> > +	u32 *efuse;
> > +	u32 *tefuse;
> > +};
> > +
> > +/*
> 
> ditto.

Sure, I'll improve it in the next version. Thanks.

> 
> > + * struct svs_bank - svs bank representation
> > + * @dev: svs bank device
> > + * @opp_dev: device for opp table/buck control
> > + * @pd_dev: power domain device for SoC mtcmos control
> > + * @init_completion: the timeout completion for bank init
> > + * @buck: phandle of the regulator

[snip]

> > +static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool
> > force_update)
> > +{
> > +	int tzone_temp = 0, ret = -EPERM;
> > +	u32 i, svsb_volt, opp_volt, temp_offset = 0;
> > +
> > +	mutex_lock(&svsb->lock);
> > +
> > +	/*
> > +	 * If svs bank is suspended, it means signed-off voltages are applied.
> > +	 * Don't need to update opp voltage anymore.
> > +	 */
> > +	if (svsb->suspended && !force_update) {
> > +		dev_notice(svsb->dev, "bank is suspended\n");
> > +		ret = -EPERM;
> > +		goto unlock_mutex;
> > +	}
> > +
> > +	/* Get thermal effect */
> > +	if (svsb->phase == SVSB_PHASE_MON) {
> > +		if (svsb->temp > svsb->temp_upper_bound &&
> > +		    svsb->temp < svsb->temp_lower_bound) {
> > +			dev_warn(svsb->dev, "svsb temp = 0x%x?\n", svsb->temp);
> > +			ret = -EINVAL;
> > +			goto unlock_mutex;
> > +		}
> > +
> > +		ret = svs_get_bank_zone_temperature(svsb->tzone_name,
> > +						    &tzone_temp);
> > +		if (ret) {
> > +			dev_err(svsb->dev, "no %s? (%d), run default volts\n",
> > +				svsb->tzone_name, ret);
> > +			svsb->phase = SVSB_PHASE_ERROR;
> > +		}
> > +
> > +		if (tzone_temp >= svsb->tzone_high_temp)
> > +			temp_offset += svsb->tzone_high_temp_offset;
> > +		else if (tzone_temp <= svsb->tzone_low_temp)
> > +			temp_offset += svsb->tzone_low_temp_offset;
> > +	}
> > +
> > +	/* vmin <= svsb_volt (opp_volt) <= signed-off (default) voltage */
> > +	for (i = 0; i < svsb->opp_count; i++) {
> 
> What about using switch here?
> 
> 		switch (svsb->phase) {
> 		case SVSB_PHASE_MON:
> 			......
> 			break;
> 		case .......:
> 			.........
> 			break;
> 		default:
> 			dev_err(......);
> 			ret = -EINVAL;
> 			goto unlock_mutex;
> 		}
> 

Okay. I'll use switch here in the next version. Thanks for the advice.

> > +		if (svsb->phase == SVSB_PHASE_MON) {
> > +			svsb_volt = max(svsb->volts[i] + svsb->volt_offset +
> > +					temp_offset, svsb->vmin);
> > +			opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
> > +							     svsb->volt_step,
> > +							     svsb->volt_base);
> > +		} else if (svsb->phase == SVSB_PHASE_INIT02) {
> > +			svsb_volt = max(svsb->volts[i] + svsb->volt_offset,
> > +					svsb->vmin);
> > +			opp_volt = svs_bank_volt_to_opp_volt(svsb_volt,
> > +							     svsb->volt_step,
> > +							     svsb->volt_base);
> > +		} else if (svsb->phase == SVSB_PHASE_ERROR) {
> > +			opp_volt = svsb->opp_volts[i];
> > +		} else {
> > +			dev_err(svsb->dev, "unknown phase: %u?\n", svsb->phase);
> > +			ret = -EINVAL;
> > +			goto unlock_mutex;
> > +		}
> > +
> > +		opp_volt = min(opp_volt, svsb->opp_volts[i]);
> > +		ret = dev_pm_opp_adjust_voltage(svsb->opp_dev,
> > +						svsb->opp_freqs[i],
> > +						opp_volt, opp_volt,
> > +						svsb->opp_volts[i]);
> > +		if (ret) {
> > +			dev_err(svsb->dev, "set voltage fail: %d\n", ret);
> > +			goto unlock_mutex;
> > +		}
> > +	}
> > +
> > +unlock_mutex:
> > +	mutex_unlock(&svsb->lock);
> > +
> > +	return ret;
> > +}

[snip]

> > +static void svs_set_bank_phase(struct svs_platform *svsp,
> > +			       enum svsb_phase target_phase)
> > +{
> > +	struct svs_bank *svsb = svsp->pbank;
> > +	u32 des_char, temp_char, det_char, limit_vals;
> > +	u32 init2vals, ts_calcs, val, filter, i;
> > +
> > +	svs_switch_bank(svsp);
> > +
> > +	des_char = (svsb->bdes << 8) | svsb->mdes;
> > +	svs_writel(svsp, des_char, DESCHAR);
> > +
> > +	temp_char = (svsb->vco << 16) | (svsb->mtdes << 8) | svsb->dvt_fixed;
> > +	svs_writel(svsp, temp_char, TEMPCHAR);
> > +
> > +	det_char = (svsb->dcbdet << 8) | svsb->dcmdet;
> > +	svs_writel(svsp, det_char, DETCHAR);
> > +
> > +	svs_writel(svsp, svsb->dc_config, DCCONFIG);
> > +	svs_writel(svsp, svsb->age_config, AGECONFIG);
> > +
> > +	if (!svsb->agem) {
> > +		svs_writel(svsp, SVSB_RUNCONFIG_DEFAULT, RUNCONFIG);
> > +	} else {
> > +		val = 0x0;
> 
> 		val = 0;
> 
> > +
> > +		for (i = 0; i < 24; i += 2) {
> > +			filter = 0x3 << i;
> > +
> > +			if (!(svsb->age_config & filter))
> > +				val |= (0x1 << i);
> 
> 				val |= BIT(i);

I'll remove these if / else for "agem" in this patch as Matthias recommended in
v20 review. Thanks for the advice.

> > +			else
> > +				val |= (svsb->age_config & filter);
> > +		}
> > +		svs_writel(svsp, val, RUNCONFIG);
> > +	}
> > +
> > +	svsb->set_freqs_pct(svsp);
> > +
> > +	limit_vals = (svsb->vmax << 24) | (svsb->vmin << 16) |
> > +		     (svsb->dthi << 8) | svsb->dtlo;
> > +	svs_writel(svsp, limit_vals, LIMITVALS);
> > +	svs_writel(svsp, svsb->vboot, VBOOT);
> > +	svs_writel(svsp, svsb->det_window, DETWINDOW);
> > +	svs_writel(svsp, svsb->det_max, CONFIG);
> > +
> > +	if (svsb->chk_shift)
> > +		svs_writel(svsp, svsb->chk_shift, CHKSHIFT);
> > +
> > +	if (svsb->ctl0)
> > +		svs_writel(svsp, svsb->ctl0, CTL0);
> > +
> > +	svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
> > +
> > +	switch (target_phase) {
> > +	case SVSB_PHASE_INIT01:
> > +		svs_writel(svsp, SVSB_INTEN_INIT0x, INTEN);
> > +		svs_writel(svsp, SVSB_EN_INIT01, SVSEN);
> > +		break;
> > +	case SVSB_PHASE_INIT02:
> > +		svs_writel(svsp, SVSB_INTEN_INIT0x, INTEN);
> > +		init2vals = (svsb->age_voffset_in << 16) | svsb->dc_voffset_in;
> > +		svs_writel(svsp, init2vals, INIT2VALS);
> > +		svs_writel(svsp, SVSB_EN_INIT02, SVSEN);
> > +		break;
> > +	case SVSB_PHASE_MON:
> > +		ts_calcs = (svsb->bts << 12) | svsb->mts;
> > +		svs_writel(svsp, ts_calcs, TSCALCS);
> > +		svs_writel(svsp, SVSB_INTEN_MONVOPEN, INTEN);
> > +		svs_writel(svsp, SVSB_EN_MON, SVSEN);
> > +		break;
> > +	default:
> > +		WARN_ON(1);
> 
> I agree about printing a big warning in kmsg here, but you can do that in a
> slightly more descriptive way:
> 
> 		WARN(1, "Requested unknown target phase %u", target_phase);
> 

Okay. I'll add description in these kinds of warning kmsg. Thanks for the
advice.

> > +		break;
> > +	}
> > +}

[snip]

> > +static int svs_init02(struct svs_platform *svsp)
> > +{
> > +	struct svs_bank *svsb;
> > +	unsigned long flags, time_left;
> > +	u32 idx;
> > +
> > +	for (idx = 0; idx < svsp->bank_num; idx++) {
> > +		svsb = &svsp->banks[idx];
> > +
> > +		if (!(svsb->mode_support & SVSB_MODE_INIT02))
> > +			continue;
> > +
> > +		reinit_completion(&svsb->init_completion);
> > +		spin_lock_irqsave(&mtk_svs_lock, flags);
> > +		svsp->pbank = svsb;
> > +		svs_set_bank_phase(svsp, SVSB_PHASE_INIT02);
> > +		spin_unlock_irqrestore(&mtk_svs_lock, flags);
> > +
> > +		time_left =
> > +			wait_for_completion_timeout(&svsb->init_completion,
> > +						    msecs_to_jiffies(5000));
> 
> There's no need to break the line... that's going to be fine:
> 
> 		time_left = wait_for_completion_timeout(&svsb->init_completion,
> 
> 							msecs_to_jiffies(5000));
> 

Okay. I'll keep it one line. Thanks.

> > +		if (!time_left) {
> > +			dev_err(svsb->dev, "init02 completion timeout\n");
> > +			return -EBUSY;
> > +		}
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int svs_init01(struct svs_platform *svsp)
> > +{
> > +	struct svs_bank *svsb;
> > +	struct pm_qos_request *qos_request;
> > +	unsigned long flags, time_left;
> > +	bool search_done;
> > +	int ret = 0;
> > +	u32 opp_freqs, opp_vboot, buck_volt, idx, i;
> > +
> > +	qos_request = kzalloc(sizeof(*qos_request), GFP_KERNEL);
> > +	if (!qos_request)
> > +		return -ENOMEM;
> > +
> > +	/* Let CPUs leave idle-off state for initializing svs_init01. */
> > +	cpu_latency_qos_add_request(qos_request, 0);
> > +
> > +	/*
> > +	 * Sometimes two svs banks use the same buck.
> > +	 * Therefore, we set each svs bank to vboot voltage first.
> > +	 */
> > +	for (idx = 0; idx < svsp->bank_num; idx++) {
> > +		svsb = &svsp->banks[idx];
> > +
> > +		if (!(svsb->mode_support & SVSB_MODE_INIT01))
> > +			continue;
> > +
> > +		search_done = false;
> > +
> > +		if (svsb->pd_req) {
> > +			ret = regulator_enable(svsb->buck);
> > +			if (ret) {
> > +				dev_err(svsb->dev, "%s enable fail: %d\n",
> > +					svsb->buck_name, ret);
> > +				goto init01_finish;
> > +			}
> > +
> > +			if (!pm_runtime_enabled(svsb->pd_dev)) {
> > +				pm_runtime_enable(svsb->pd_dev);
> > +				svsb->enable_pm_runtime_ever = true;
> > +			}
> > +
> > +			ret = pm_runtime_get_sync(svsb->pd_dev);
> > +			if (ret < 0) {
> > +				dev_err(svsb->dev, "mtcmos on fail: %d\n", ret);
> > +				goto init01_finish;
> > +			}
> > +		}
> > +
> > +		if (regulator_set_mode(svsb->buck, REGULATOR_MODE_FAST))
> > +			dev_notice(svsb->dev, "set fast mode fail\n");
> > +
> > +		/*
> > +		 * Find the fastest freq that can be run at vboot and
> > +		 * fix to that freq until svs_init01 is done.
> > +		 */
> > +		opp_vboot = svs_bank_volt_to_opp_volt(svsb->vboot,
> > +						      svsb->volt_step,
> > +						      svsb->volt_base);
> > +
> > +		for (i = 0; i < svsb->opp_count; i++) {
> > +			opp_freqs = svsb->opp_freqs[i];
> > +			if (!search_done && svsb->opp_volts[i] <= opp_vboot) {
> > +				ret = dev_pm_opp_adjust_voltage(svsb->opp_dev,
> > +								opp_freqs,
> > +								opp_vboot,
> > +								opp_vboot,
> > +								opp_vboot);
> > +				if (ret) {
> > +					dev_err(svsb->dev,
> > +						"set voltage fail: %d\n", ret);
> > +					goto init01_finish;
> > +				}
> > +
> > +				search_done = true;
> > +			} else {
> > +				dev_pm_opp_disable(svsb->opp_dev,
> > +						   svsb->opp_freqs[i]);
> > +			}
> > +		}
> > +	}
> > +
> > +	/* svs bank init01 begins */
> > +	for (idx = 0; idx < svsp->bank_num; idx++) {
> > +		svsb = &svsp->banks[idx];
> > +
> > +		if (!(svsb->mode_support & SVSB_MODE_INIT01))
> > +			continue;
> > +
> > +		opp_vboot = svs_bank_volt_to_opp_volt(svsb->vboot,
> > +						      svsb->volt_step,
> > +						      svsb->volt_base);
> > +
> > +		buck_volt = regulator_get_voltage(svsb->buck);
> > +		if (buck_volt != opp_vboot) {
> > +			dev_err(svsb->dev,
> > +				"buck voltage: %u, expected vboot: %u\n",
> > +				buck_volt, opp_vboot);
> > +			ret = -EPERM;
> > +			goto init01_finish;
> > +		}
> > +
> > +		spin_lock_irqsave(&mtk_svs_lock, flags);
> > +		svsp->pbank = svsb;
> > +		svs_set_bank_phase(svsp, SVSB_PHASE_INIT01);
> > +		spin_unlock_irqrestore(&mtk_svs_lock, flags);
> > +
> > +		time_left =
> > +			wait_for_completion_timeout(&svsb->init_completion,
> 
> 81 columns is ok to have.
> 

Okay. Thanks. I'll keep it one line.

> > +						    msecs_to_jiffies(5000));
> > +		if (!time_left) {
> > +			dev_err(svsb->dev, "init01 completion timeout\n");
> > +			ret = -EBUSY;
> > +			goto init01_finish;
> > +		}
> > +	}
> > +
> > +init01_finish:
> > +	for (idx = 0; idx < svsp->bank_num; idx++) {
> > +		svsb = &svsp->banks[idx];
> > +
> > +		if (!(svsb->mode_support & SVSB_MODE_INIT01))
> > +			continue;
> > +
> > +		for (i = 0; i < svsb->opp_count; i++)
> > +			dev_pm_opp_enable(svsb->opp_dev, svsb->opp_freqs[i]);
> > +
> > +		if (regulator_set_mode(svsb->buck, REGULATOR_MODE_NORMAL))
> > +			dev_notice(svsb->dev, "fail to set normal mode\n");
> > +
> > +		if (svsb->pd_req) {
> > +			if (pm_runtime_put_sync(svsb->pd_dev))
> > +				dev_err(svsb->dev, "mtcmos off fail\n");
> > +
> > +			if (svsb->enable_pm_runtime_ever) {
> > +				pm_runtime_disable(svsb->pd_dev);
> > +				svsb->enable_pm_runtime_ever = false;
> > +			}
> > +
> > +			if (regulator_disable(svsb->buck))
> > +				dev_err(svsb->dev, "%s disable fail: %d\n",
> > +					svsb->buck_name, ret);
> > +		}
> > +	}
> > +
> > +	cpu_latency_qos_remove_request(qos_request);
> > +	kfree(qos_request);
> > +
> > +	return ret;
> > +}

[snip]

> > +static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
> > +{
> > +	struct thermal_parameter tp;
> > +	struct svs_bank *svsb;
> > +	bool mon_mode_support = true;
> > +	int format[6], x_roomt[6], tb_roomt = 0;
> > +	struct nvmem_cell *cell;
> > +	u32 idx, i, ft_pgm, mts, temp0, temp1, temp2;
> > +
> > +	for (i = 0; i < svsp->efuse_num; i++)
> > +		if (svsp->efuse[i])
> > +			dev_info(svsp->dev, "M_HW_RES%d: 0x%08x\n",
> > +				 i, svsp->efuse[i]);
> > +
> > +	/* Svs efuse parsing */
> > +	ft_pgm = (svsp->efuse[0] >> 4) & GENMASK(3, 0);
> > +
> > +	for (idx = 0; idx < svsp->bank_num; idx++) {
> > +		svsb = &svsp->banks[idx];
> > +
> > +		if (ft_pgm <= 1)
> > +			svsb->volt_flags |= SVSB_INIT01_VOLT_IGNORE;
> > +
> > +		switch (svsb->sw_id) {
> > +		case SVSB_CPU_LITTLE:
> > +			svsb->bdes = svsp->efuse[16] & GENMASK(7, 0);
> > +			svsb->mdes = (svsp->efuse[16] >> 8) & GENMASK(7, 0);
> > +			svsb->dcbdet = (svsp->efuse[16] >> 16) & GENMASK(7, 0);
> > +			svsb->dcmdet = (svsp->efuse[16] >> 24) & GENMASK(7, 0);
> > +			svsb->mtdes  = (svsp->efuse[17] >> 16) & GENMASK(7, 0);
> > +
> > +			if (ft_pgm <= 3)
> > +				svsb->volt_offset += 10;
> > +			else
> > +				svsb->volt_offset += 2;
> > +			break;
> > +		case SVSB_CPU_BIG:
> > +			svsb->bdes = svsp->efuse[18] & GENMASK(7, 0);
> > +			svsb->mdes = (svsp->efuse[18] >> 8) & GENMASK(7, 0);
> > +			svsb->dcbdet = (svsp->efuse[18] >> 16) & GENMASK(7, 0);
> > +			svsb->dcmdet = (svsp->efuse[18] >> 24) & GENMASK(7, 0);
> > +			svsb->mtdes  = svsp->efuse[17] & GENMASK(7, 0);
> > +
> > +			if (ft_pgm <= 3)
> > +				svsb->volt_offset += 15;
> > +			else
> > +				svsb->volt_offset += 12;
> > +			break;
> > +		case SVSB_CCI:
> > +			svsb->bdes = svsp->efuse[4] & GENMASK(7, 0);
> > +			svsb->mdes = (svsp->efuse[4] >> 8) & GENMASK(7, 0);
> > +			svsb->dcbdet = (svsp->efuse[4] >> 16) & GENMASK(7, 0);
> > +			svsb->dcmdet = (svsp->efuse[4] >> 24) & GENMASK(7, 0);
> > +			svsb->mtdes  = (svsp->efuse[5] >> 16) & GENMASK(7, 0);
> > +
> > +			if (ft_pgm <= 3)
> > +				svsb->volt_offset += 10;
> > +			else
> > +				svsb->volt_offset += 2;
> > +			break;
> > +		case SVSB_GPU:
> > +			svsb->bdes = svsp->efuse[6] & GENMASK(7, 0);
> > +			svsb->mdes = (svsp->efuse[6] >> 8) & GENMASK(7, 0);
> > +			svsb->dcbdet = (svsp->efuse[6] >> 16) & GENMASK(7, 0);
> > +			svsb->dcmdet = (svsp->efuse[6] >> 24) & GENMASK(7, 0);
> > +			svsb->mtdes  = svsp->efuse[5] & GENMASK(7, 0);
> > +
> > +			if (ft_pgm >= 2) {
> > +				svsb->freq_base = 800000000; /* 800MHz */
> > +				svsb->dvt_fixed = 2;
> > +			}
> > +			break;
> > +		default:
> > +			break;
> > +		}
> > +	}
> > +
> > +	/* Get thermal efuse by nvmem */
> > +	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
> > +	if (IS_ERR_OR_NULL(cell)) {
> > +		dev_err(svsp->dev, "no thermal cell, no mon mode\n");
> > +		for (idx = 0; idx < svsp->bank_num; idx++) {
> > +			svsb = &svsp->banks[idx];
> > +			svsb->mode_support &= ~SVSB_MODE_MON;
> > +		}
> > +
> > +		return true;
> > +	}
> > +
> > +	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_num);
> 
> nvmem_cell_read may return an error pointer: you have to check that.
> 
> 	if (IS_ERR(svsp->tefuse))
> 		.........
> 
> Failing to perform this check will produce unpredictable behavior
> during the parsing stage.
> 

Sure. I'll add the error handling when using nvmem_cell_read(). Thanks for the
advice.

> > +	svsp->tefuse_num /= sizeof(u32);
> > +	nvmem_cell_put(cell);
> > +
> > +	/* Thermal efuse parsing */
> > +	tp.adc_ge_t = (svsp->tefuse[1] >> 22) & GENMASK(9, 0);
> > +	tp.adc_oe_t = (svsp->tefuse[1] >> 12) & GENMASK(9, 0);
> > +
> > +	tp.o_vtsmcu1 = (svsp->tefuse[0] >> 17) & GENMASK(8, 0);
> > +	tp.o_vtsmcu2 = (svsp->tefuse[0] >> 8) & GENMASK(8, 0);
> > +	tp.o_vtsmcu3 = svsp->tefuse[1] & GENMASK(8, 0);
> > +	tp.o_vtsmcu4 = (svsp->tefuse[2] >> 23) & GENMASK(8, 0);
> > +	tp.o_vtsmcu5 = (svsp->tefuse[2] >> 5) & GENMASK(8, 0);
> > +	tp.o_vtsabb = (svsp->tefuse[2] >> 14) & GENMASK(8, 0);
> > +
> > +	tp.degc_cali = (svsp->tefuse[0] >> 1) & GENMASK(5, 0);
> > +	tp.adc_cali_en_t = svsp->tefuse[0] & BIT(0);
> > +	tp.o_slope_sign = (svsp->tefuse[0] >> 7) & BIT(0);
> > +
> > +	tp.ts_id = (svsp->tefuse[1] >> 9) & BIT(0);
> > +	tp.o_slope = (svsp->tefuse[0] >> 26) & GENMASK(5, 0);
> > +
> 
> Regards,
> - Angelo
> 
> 


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Re: [PATCH v16 3/7] soc: mediatek: SVS: introduce MTK SVS engine

[AngeloGioacchino Del Regno]

Il 24/12/21 10:27, Roger Lu ha scritto:
> Hi AngeloGioacchino,
> 
> Sorry for the late reply and thanks for all the advices.
> 
> On Thu, 2021-10-21 at 10:46 +0200, AngeloGioacchino Del Regno wrote:
>> Il 28/04/21 08:54, Roger Lu ha scritto:
>>> 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.
>>>
>>> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
>>> ---
>>>    drivers/soc/mediatek/Kconfig   |   10 +
>>>    drivers/soc/mediatek/Makefile  |    1 +
>>>    drivers/soc/mediatek/mtk-svs.c | 1723 ++++++++++++++++++++++++++++++++
>>>    3 files changed, 1734 insertions(+)
>>>    create mode 100644 drivers/soc/mediatek/mtk-svs.c
> 
> [snip]
> 
>>> +/* svs bank common setting */
>>> +#define SVSB_DET_CLK_EN			BIT(31)
>>> +#define SVSB_TZONE_HIGH_TEMP_MAX	U32_MAX
>>> +#define SVSB_RUNCONFIG_DEFAULT		0x80000000
>>> +#define SVSB_DC_SIGNED_BIT		0x8000
>>> +#define SVSB_INTEN_INIT0x		0x00005f01
>>> +#define SVSB_INTEN_MONVOPEN		0x00ff0000
>>> +#define SVSB_EN_OFF			0x0
>>> +#define SVSB_EN_MASK			0x7
>>> +#define SVSB_EN_INIT01			0x1
>>> +#define SVSB_EN_INIT02			0x5
>>> +#define SVSB_EN_MON			0x2
>>> +#define SVSB_INTSTS_MONVOP		0x00ff0000
>>> +#define SVSB_INTSTS_COMPLETE		0x1
>>> +#define SVSB_INTSTS_CLEAN		0x00ffffff
>>> +
>>> +static DEFINE_SPINLOCK(mtk_svs_lock);
>>> +
>>> +/*
>>
>> Thanks for using kernel-doc!! However, to be proper, this has to be
>> /**
>>    * ..........
> 
> Oh okay. Thanks. I will use /** to add multi-line comments. However, I checked
> kernel doc-guide and it uses indent as below. So, I'll follow it. If I'm doing
> it wrong, please correct me. Thanks a lot.
> https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html
> 
> /**
>   * .........
> 

You're welcome! By the way, yes, the indentation is as shown on the documentation.

Regards,
- Angelo

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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v16 4/7] soc: mediatek: SVS: add debug commands

[Roger Lu]

The purpose of SVS is to help find the suitable voltages
for DVFS. Therefore, if SVS bank voltages are concerned
to be wrong, we can adjust SVS bank voltages by this patch.

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
---
 drivers/soc/mediatek/mtk-svs.c | 328 +++++++++++++++++++++++++++++++++
 1 file changed, 328 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index 2d2153c92373..8794a2d87baa 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -6,6 +6,7 @@
 #include <linux/bits.h>
 #include <linux/clk.h>
 #include <linux/completion.h>
+#include <linux/debugfs.h>
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -24,6 +25,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
+#include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/thermal.h>
@@ -62,6 +64,39 @@
 #define SVSB_INTSTS_COMPLETE		0x1
 #define SVSB_INTSTS_CLEAN		0x00ffffff
 
+#define debug_fops_ro(name)						\
+	static int svs_##name##_debug_open(struct inode *inode,		\
+					   struct file *filp)		\
+	{								\
+		return single_open(filp, svs_##name##_debug_show,	\
+				   inode->i_private);			\
+	}								\
+	static const struct file_operations svs_##name##_debug_fops = {	\
+		.owner = THIS_MODULE,					\
+		.open = svs_##name##_debug_open,			\
+		.read = seq_read,					\
+		.llseek = seq_lseek,					\
+		.release = single_release,				\
+	}
+
+#define debug_fops_rw(name)						\
+	static int svs_##name##_debug_open(struct inode *inode,		\
+					   struct file *filp)		\
+	{								\
+		return single_open(filp, svs_##name##_debug_show,	\
+				   inode->i_private);			\
+	}								\
+	static const struct file_operations svs_##name##_debug_fops = {	\
+		.owner = THIS_MODULE,					\
+		.open = svs_##name##_debug_open,			\
+		.read = seq_read,					\
+		.write = svs_##name##_debug_write,			\
+		.llseek = seq_lseek,					\
+		.release = single_release,				\
+	}
+
+#define svs_dentry(name)	{__stringify(name), &svs_##name##_debug_fops}
+
 static DEFINE_SPINLOCK(mtk_svs_lock);
 
 /*
@@ -83,6 +118,7 @@ enum svsb_phase {
 	SVSB_PHASE_INIT01,
 	SVSB_PHASE_INIT02,
 	SVSB_PHASE_MON,
+	SVSB_PHASE_NUM,
 };
 
 enum svs_reg_index {
@@ -140,6 +176,7 @@ enum svs_reg_index {
 	SPARE2,
 	SPARE3,
 	THSLPEVEB,
+	SVS_REG_NUM,
 };
 
 static const u32 svs_regs_v2[] = {
@@ -284,6 +321,7 @@ struct svs_platform {
  * @opp_volts: signed-off voltages from default opp table
  * @freqs_pct: percent of "opp_freqs / freq_base" for bank init
  * @volts: bank voltages
+ * @reg_data: bank register data of each phase
  * @freq_base: reference frequency for bank init
  * @vboot: voltage request for bank init01 stage only
  * @volt_step: bank voltage step
@@ -302,6 +340,7 @@ struct svs_platform {
  * @opp_count: bank opp count
  * @int_st: bank interrupt identification
  * @sw_id: bank software identification
+ * @hw_id: bank hardware identification
  * @ctl0: bank thermal sensor selection
  * @cpu_id: cpu core id for SVS CPU only
  *
@@ -330,6 +369,7 @@ struct svs_bank {
 	u32 opp_volts[16];
 	u32 freqs_pct[16];
 	u32 volts[16];
+	u32 reg_data[SVSB_PHASE_NUM][SVS_REG_NUM];
 	u32 freq_base;
 	u32 vboot;
 	u32 volt_step;
@@ -367,6 +407,7 @@ struct svs_bank {
 	u32 opp_count;
 	u32 int_st;
 	u32 sw_id;
+	u32 hw_id;
 	u32 ctl0;
 	u32 cpu_id;
 };
@@ -648,11 +689,15 @@ static void svs_set_bank_phase(struct svs_platform *svsp,
 static inline void svs_init01_isr_handler(struct svs_platform *svsp)
 {
 	struct svs_bank *svsb = svsp->pbank;
+	enum svs_reg_index rg_i;
 
 	dev_info(svsb->dev, "%s: VDN74~30:0x%08x~0x%08x, DC:0x%08x\n",
 		 __func__, svs_readl(svsp, VDESIGN74),
 		 svs_readl(svsp, VDESIGN30), svs_readl(svsp, DCVALUES));
 
+	for (rg_i = DESCHAR; rg_i < SVS_REG_NUM; rg_i++)
+		svsb->reg_data[SVSB_PHASE_INIT01][rg_i] = svs_readl(svsp, rg_i);
+
 	svsb->phase = SVSB_PHASE_INIT01;
 	svsb->dc_voffset_in = ~(svs_readl(svsp, DCVALUES) & GENMASK(15, 0)) + 1;
 	if (svsb->volt_flags & SVSB_INIT01_VOLT_IGNORE ||
@@ -672,11 +717,15 @@ static inline void svs_init01_isr_handler(struct svs_platform *svsp)
 static inline void svs_init02_isr_handler(struct svs_platform *svsp)
 {
 	struct svs_bank *svsb = svsp->pbank;
+	enum svs_reg_index rg_i;
 
 	dev_info(svsb->dev, "%s: VOP74~30:0x%08x~0x%08x, DC:0x%08x\n",
 		 __func__, svs_readl(svsp, VOP74), svs_readl(svsp, VOP30),
 		 svs_readl(svsp, DCVALUES));
 
+	for (rg_i = DESCHAR; rg_i < SVS_REG_NUM; rg_i++)
+		svsb->reg_data[SVSB_PHASE_INIT02][rg_i] = svs_readl(svsp, rg_i);
+
 	svsb->phase = SVSB_PHASE_INIT02;
 	svsb->get_vops(svsp);
 
@@ -687,6 +736,10 @@ static inline void svs_init02_isr_handler(struct svs_platform *svsp)
 static inline void svs_mon_mode_isr_handler(struct svs_platform *svsp)
 {
 	struct svs_bank *svsb = svsp->pbank;
+	enum svs_reg_index rg_i;
+
+	for (rg_i = DESCHAR; rg_i < SVS_REG_NUM; rg_i++)
+		svsb->reg_data[SVSB_PHASE_MON][rg_i] = svs_readl(svsp, rg_i);
 
 	svsb->phase = SVSB_PHASE_MON;
 	svsb->temp = svs_readl(svsp, TEMP) & GENMASK(7, 0);
@@ -698,6 +751,7 @@ static inline void svs_mon_mode_isr_handler(struct svs_platform *svsp)
 static inline void svs_error_isr_handler(struct svs_platform *svsp)
 {
 	struct svs_bank *svsb = svsp->pbank;
+	enum svs_reg_index rg_i;
 
 	dev_err(svsb->dev, "%s: CORESEL = 0x%08x\n",
 		__func__, svs_readl(svsp, CORESEL));
@@ -707,6 +761,9 @@ static inline void svs_error_isr_handler(struct svs_platform *svsp)
 		svs_readl(svsp, SMSTATE0), svs_readl(svsp, SMSTATE1));
 	dev_err(svsb->dev, "TEMP = 0x%08x\n", svs_readl(svsp, TEMP));
 
+	for (rg_i = DESCHAR; rg_i < SVS_REG_NUM; rg_i++)
+		svsb->reg_data[SVSB_PHASE_ERROR][rg_i] = svs_readl(svsp, rg_i);
+
 	svsb->mode_support = SVSB_MODE_ALL_DISABLE;
 	svsb->phase = SVSB_PHASE_ERROR;
 
@@ -1416,11 +1473,273 @@ static int svs_resume(struct device *dev)
 	return 0;
 }
 
+/*
+ * svs_dump_debug_show - dump svs/thermal efuse and svs banks' registers
+ */
+static int svs_dump_debug_show(struct seq_file *m, void *p)
+{
+	struct svs_platform *svsp = (struct svs_platform *)m->private;
+	struct svs_bank *svsb;
+	unsigned long svs_reg_addr;
+	u32 idx, i, j;
+
+	for (i = 0; i < svsp->efuse_num; i++)
+		if (svsp->efuse && svsp->efuse[i])
+			seq_printf(m, "M_HW_RES%d = 0x%08x\n",
+				   i, svsp->efuse[i]);
+
+	for (i = 0; i < svsp->tefuse_num; i++)
+		if (svsp->tefuse)
+			seq_printf(m, "THERMAL_EFUSE%d = 0x%08x\n",
+				   i, svsp->tefuse[i]);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		for (i = SVSB_PHASE_INIT01; i <= SVSB_PHASE_MON; i++) {
+			seq_printf(m, "Bank_number = %u\n", svsb->hw_id);
+
+			if (i == SVSB_PHASE_INIT01 || i == SVSB_PHASE_INIT02)
+				seq_printf(m, "mode = init%d\n", i);
+			else if (i == SVSB_PHASE_MON)
+				seq_puts(m, "mode = mon\n");
+			else
+				seq_puts(m, "mode = error\n");
+
+			for (j = DESCHAR; j < SVS_REG_NUM; j++) {
+				svs_reg_addr = (unsigned long)(svsp->base +
+							       svsp->regs[j]);
+				seq_printf(m, "0x%08lx = 0x%08x\n",
+					   svs_reg_addr, svsb->reg_data[i][j]);
+			}
+		}
+	}
+
+	return 0;
+}
+
+debug_fops_ro(dump);
+
+/*
+ * svs_enable_debug_show - show svs bank current enable phase
+ */
+static int svs_enable_debug_show(struct seq_file *m, void *v)
+{
+	struct svs_bank *svsb = (struct svs_bank *)m->private;
+
+	if (svsb->phase == SVSB_PHASE_INIT01)
+		seq_puts(m, "init1\n");
+	else if (svsb->phase == SVSB_PHASE_INIT02)
+		seq_puts(m, "init2\n");
+	else if (svsb->phase == SVSB_PHASE_MON)
+		seq_puts(m, "mon mode\n");
+	else if (svsb->phase == SVSB_PHASE_ERROR)
+		seq_puts(m, "disabled\n");
+	else
+		seq_puts(m, "unknown\n");
+
+	return 0;
+}
+
+/*
+ * svs_enable_debug_write - we only support svs bank disable control
+ */
+static ssize_t svs_enable_debug_write(struct file *filp,
+				      const char __user *buffer,
+				      size_t count, loff_t *pos)
+{
+	struct svs_bank *svsb = file_inode(filp)->i_private;
+	struct svs_platform *svsp = dev_get_drvdata(svsb->dev);
+	unsigned long flags;
+	int enabled, ret;
+	char *buf = NULL;
+
+	if (count >= PAGE_SIZE)
+		return -EINVAL;
+
+	buf = (char *)memdup_user_nul(buffer, count);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
+	ret = kstrtoint(buf, 10, &enabled);
+	if (ret)
+		return ret;
+
+	if (!enabled) {
+		spin_lock_irqsave(&mtk_svs_lock, flags);
+		svsp->pbank = svsb;
+		svsb->mode_support = SVSB_MODE_ALL_DISABLE;
+		svs_switch_bank(svsp);
+		svs_writel(svsp, SVSB_EN_OFF, SVSEN);
+		svs_writel(svsp, SVSB_INTSTS_CLEAN, INTSTS);
+		spin_unlock_irqrestore(&mtk_svs_lock, flags);
+
+		svsb->phase = SVSB_PHASE_ERROR;
+		svs_adjust_pm_opp_volts(svsb, true);
+	}
+
+	kfree(buf);
+
+	return count;
+}
+
+debug_fops_rw(enable);
+
+/*
+ * svs_status_debug_show - show svs bank's tzone_temp/voltages/freqs_pct
+ * and its corresponding opp-table's opp_freqs/opp_volts
+ */
+static int svs_status_debug_show(struct seq_file *m, void *v)
+{
+	struct svs_bank *svsb = (struct svs_bank *)m->private;
+	struct dev_pm_opp *opp;
+	int tzone_temp = 0, ret;
+	u32 i;
+
+	ret = svs_get_bank_zone_temperature(svsb->tzone_name, &tzone_temp);
+	if (ret)
+		seq_printf(m, "%s: no \"%s\" zone?\n", svsb->name,
+			   svsb->tzone_name);
+	else
+		seq_printf(m, "%s: temperature = %d\n", svsb->name, tzone_temp);
+
+	for (i = 0; i < svsb->opp_count; i++) {
+		opp = dev_pm_opp_find_freq_exact(svsb->opp_dev,
+						 svsb->opp_freqs[i], true);
+		if (IS_ERR(opp)) {
+			seq_printf(m, "%s: cannot find freq = %u (%ld)\n",
+				   svsb->name, svsb->opp_freqs[i],
+				   PTR_ERR(opp));
+			return PTR_ERR(opp);
+		}
+
+		seq_printf(m, "opp_freqs[%02u]: %u, opp_volts[%02u]: %lu, ",
+			   i, svsb->opp_freqs[i], i,
+			   dev_pm_opp_get_voltage(opp));
+		seq_printf(m, "svsb_volts[%02u]: 0x%x, freqs_pct[%02u]: %u\n",
+			   i, svsb->volts[i], i, svsb->freqs_pct[i]);
+		dev_pm_opp_put(opp);
+	}
+
+	return 0;
+}
+
+debug_fops_ro(status);
+
+/*
+ * svs_volt_offset_debug_show - show svs bank's voltage offset
+ */
+static int svs_volt_offset_debug_show(struct seq_file *m, void *v)
+{
+	struct svs_bank *svsb = (struct svs_bank *)m->private;
+
+	seq_printf(m, "%d\n", svsb->volt_offset);
+
+	return 0;
+}
+
+/*
+ * svs_volt_offset_debug_write - write svs bank's voltage offset
+ */
+static ssize_t svs_volt_offset_debug_write(struct file *filp,
+					   const char __user *buffer,
+					   size_t count, loff_t *pos)
+{
+	struct svs_bank *svsb = file_inode(filp)->i_private;
+	char *buf = NULL;
+	s32 volt_offset;
+
+	if (count >= PAGE_SIZE)
+		return -EINVAL;
+
+	buf = (char *)memdup_user_nul(buffer, count);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
+	if (!kstrtoint(buf, 10, &volt_offset)) {
+		svsb->volt_offset = volt_offset;
+		svs_adjust_pm_opp_volts(svsb, true);
+	}
+
+	kfree(buf);
+
+	return count;
+}
+
+debug_fops_rw(volt_offset);
+
+static int svs_create_svs_debug_cmds(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	struct dentry *svs_dir, *svsb_dir, *file_entry;
+	const char *d = "/sys/kernel/debug/svs";
+	u32 i, idx;
+
+	struct svs_dentry {
+		const char *name;
+		const struct file_operations *fops;
+	};
+
+	struct svs_dentry svs_entries[] = {
+		svs_dentry(dump),
+	};
+
+	struct svs_dentry svsb_entries[] = {
+		svs_dentry(enable),
+		svs_dentry(status),
+		svs_dentry(volt_offset),
+	};
+
+	svs_dir = debugfs_create_dir("svs", NULL);
+	if (IS_ERR(svs_dir)) {
+		dev_err(svsp->dev, "cannot create %s: %ld\n",
+			d, PTR_ERR(svs_dir));
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(svs_entries); i++) {
+		file_entry = debugfs_create_file(svs_entries[i].name, 0664,
+						 svs_dir, svsp,
+						 svs_entries[i].fops);
+		if (IS_ERR(file_entry)) {
+			dev_err(svsp->dev, "cannot create %s/%s: %ld\n",
+				d, svs_entries[i].name, PTR_ERR(file_entry));
+			return PTR_ERR(file_entry);
+		}
+	}
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		svsb_dir = debugfs_create_dir(svsb->name, svs_dir);
+		if (IS_ERR(svsb_dir)) {
+			dev_err(svsp->dev, "cannot create %s/%s: %ld\n",
+				d, svsb->name, PTR_ERR(svsb_dir));
+			return PTR_ERR(svsb_dir);
+		}
+
+		for (i = 0; i < ARRAY_SIZE(svsb_entries); i++) {
+			file_entry = debugfs_create_file(svsb_entries[i].name,
+							 0664, svsb_dir, svsb,
+							 svsb_entries[i].fops);
+			if (IS_ERR(file_entry)) {
+				dev_err(svsp->dev, "no %s/%s/%s?: %ld\n",
+					d, svsb->name, svsb_entries[i].name,
+					PTR_ERR(file_entry));
+				return PTR_ERR(file_entry);
+			}
+		}
+	}
+
+	return 0;
+}
+
 static struct svs_bank svs_mt8183_banks[] = {
 	{
 		.sw_id			= SVSB_CPU_LITTLE,
 		.set_freqs_pct		= svs_set_freqs_pct_v2,
 		.get_vops		= svs_get_vops_v2,
+		.hw_id			= 0,
 		.cpu_id			= 0,
 		.tzone_name		= "tzts4",
 		.buck_name		= "proc",
@@ -1458,6 +1777,7 @@ static struct svs_bank svs_mt8183_banks[] = {
 		.sw_id			= SVSB_CPU_BIG,
 		.set_freqs_pct		= svs_set_freqs_pct_v2,
 		.get_vops		= svs_get_vops_v2,
+		.hw_id			= 1,
 		.cpu_id			= 4,
 		.tzone_name		= "tzts5",
 		.buck_name		= "proc",
@@ -1495,6 +1815,7 @@ static struct svs_bank svs_mt8183_banks[] = {
 		.sw_id			= SVSB_CCI,
 		.set_freqs_pct		= svs_set_freqs_pct_v2,
 		.get_vops		= svs_get_vops_v2,
+		.hw_id			= 2,
 		.tzone_name		= "tzts4",
 		.buck_name		= "proc",
 		.pd_req			= false,
@@ -1531,6 +1852,7 @@ static struct svs_bank svs_mt8183_banks[] = {
 		.sw_id			= SVSB_GPU,
 		.set_freqs_pct		= svs_set_freqs_pct_v2,
 		.get_vops		= svs_get_vops_v2,
+		.hw_id			= 3,
 		.tzone_name		= "tzts2",
 		.buck_name		= "mali",
 		.pd_req			= true,
@@ -1694,6 +2016,12 @@ static int svs_probe(struct platform_device *pdev)
 		goto svs_probe_iounmap;
 	}
 
+	ret = svs_create_svs_debug_cmds(svsp);
+	if (ret) {
+		dev_err(svsp->dev, "svs create debug cmds fail: %d\n", ret);
+		goto svs_probe_iounmap;
+	}
+
 	return 0;
 
 svs_probe_iounmap:
-- 
2.18.0
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Re: [PATCH v16 4/7] soc: mediatek: SVS: add debug commands

[AngeloGioacchino Del Regno]

Il 28/04/21 08:54, Roger Lu ha scritto:
> The purpose of SVS is to help find the suitable voltages
> for DVFS. Therefore, if SVS bank voltages are concerned
> to be wrong, we can adjust SVS bank voltages by this patch.
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>   drivers/soc/mediatek/mtk-svs.c | 328 +++++++++++++++++++++++++++++++++
>   1 file changed, 328 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
> index 2d2153c92373..8794a2d87baa 100644
> --- a/drivers/soc/mediatek/mtk-svs.c
> +++ b/drivers/soc/mediatek/mtk-svs.c
> @@ -6,6 +6,7 @@
>   #include <linux/bits.h>
>   #include <linux/clk.h>
>   #include <linux/completion.h>
> +#include <linux/debugfs.h>
>   #include <linux/device.h>
>   #include <linux/init.h>
>   #include <linux/interrupt.h>
> @@ -24,6 +25,7 @@
>   #include <linux/pm_runtime.h>
>   #include <linux/regulator/consumer.h>
>   #include <linux/reset.h>
> +#include <linux/seq_file.h>
>   #include <linux/slab.h>
>   #include <linux/spinlock.h>
>   #include <linux/thermal.h>
> @@ -62,6 +64,39 @@
>   #define SVSB_INTSTS_COMPLETE		0x1
>   #define SVSB_INTSTS_CLEAN		0x00ffffff
>   
> +#define debug_fops_ro(name)						\
> +	static int svs_##name##_debug_open(struct inode *inode,		\
> +					   struct file *filp)		\
> +	{								\
> +		return single_open(filp, svs_##name##_debug_show,	\
> +				   inode->i_private);			\
> +	}								\
> +	static const struct file_operations svs_##name##_debug_fops = {	\
> +		.owner = THIS_MODULE,					\
> +		.open = svs_##name##_debug_open,			\
> +		.read = seq_read,					\
> +		.llseek = seq_lseek,					\
> +		.release = single_release,				\
> +	}
> +
> +#define debug_fops_rw(name)						\
> +	static int svs_##name##_debug_open(struct inode *inode,		\
> +					   struct file *filp)		\
> +	{								\
> +		return single_open(filp, svs_##name##_debug_show,	\
> +				   inode->i_private);			\
> +	}								\
> +	static const struct file_operations svs_##name##_debug_fops = {	\
> +		.owner = THIS_MODULE,					\
> +		.open = svs_##name##_debug_open,			\
> +		.read = seq_read,					\
> +		.write = svs_##name##_debug_write,			\
> +		.llseek = seq_lseek,					\
> +		.release = single_release,				\
> +	}
> +
> +#define svs_dentry(name)	{__stringify(name), &svs_##name##_debug_fops}
> +
>   static DEFINE_SPINLOCK(mtk_svs_lock);
>   
>   /*
> @@ -83,6 +118,7 @@ enum svsb_phase {
>   	SVSB_PHASE_INIT01,
>   	SVSB_PHASE_INIT02,
>   	SVSB_PHASE_MON,
> +	SVSB_PHASE_NUM,

I would move the addition of these last members in the previous (3/7) patch,
where you introduce the driver in the first place.

Also, I think that using _MAX instead would be better, as it is pretty
much a common practice. So, this would become SVSB_PHASE_MAX.

>   };
>   
>   enum svs_reg_index {
> @@ -140,6 +176,7 @@ enum svs_reg_index {
>   	SPARE2,
>   	SPARE3,
>   	THSLPEVEB,
> +	SVS_REG_NUM,

... and this would become SVS_REG_MAX

>   };
>   
>   static const u32 svs_regs_v2[] = {

Apart from that,

Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>


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Re: [PATCH v16 4/7] soc: mediatek: SVS: add debug commands

[Roger Lu]

Hi AngeloGioacchino,

Sorry for the late reply.

On Thu, 2021-10-21 at 10:52 +0200, AngeloGioacchino Del Regno wrote:
> Il 28/04/21 08:54, Roger Lu ha scritto:
> > The purpose of SVS is to help find the suitable voltages
> > for DVFS. Therefore, if SVS bank voltages are concerned
> > to be wrong, we can adjust SVS bank voltages by this patch.
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > ---
> >   drivers/soc/mediatek/mtk-svs.c | 328 +++++++++++++++++++++++++++++++++
> >   1 file changed, 328 insertions(+)
> > 
> > diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
> > index 2d2153c92373..8794a2d87baa 100644
> > --- a/drivers/soc/mediatek/mtk-svs.c
> > +++ b/drivers/soc/mediatek/mtk-svs.c
> > @@ -6,6 +6,7 @@
> >   #include <linux/bits.h>
> >   #include <linux/clk.h>
> >   #include <linux/completion.h>
> > +#include <linux/debugfs.h>
> >   #include <linux/device.h>
> >   #include <linux/init.h>
> >   #include <linux/interrupt.h>
> > @@ -24,6 +25,7 @@
> >   #include <linux/pm_runtime.h>
> >   #include <linux/regulator/consumer.h>
> >   #include <linux/reset.h>
> > +#include <linux/seq_file.h>
> >   #include <linux/slab.h>
> >   #include <linux/spinlock.h>
> >   #include <linux/thermal.h>
> > @@ -62,6 +64,39 @@
> >   #define SVSB_INTSTS_COMPLETE		0x1
> >   #define SVSB_INTSTS_CLEAN		0x00ffffff
> >   
> > +#define debug_fops_ro(name)						
> > \
> > +	static int svs_##name##_debug_open(struct inode *inode,		\
> > +					   struct file *filp)		\
> > +	{								\
> > +		return single_open(filp, svs_##name##_debug_show,	\
> > +				   inode->i_private);			\
> > +	}								\
> > +	static const struct file_operations svs_##name##_debug_fops = {	\
> > +		.owner = THIS_MODULE,					\
> > +		.open = svs_##name##_debug_open,			\
> > +		.read = seq_read,					\
> > +		.llseek = seq_lseek,					\
> > +		.release = single_release,				\
> > +	}
> > +
> > +#define debug_fops_rw(name)						
> > \
> > +	static int svs_##name##_debug_open(struct inode *inode,		\
> > +					   struct file *filp)		\
> > +	{								\
> > +		return single_open(filp, svs_##name##_debug_show,	\
> > +				   inode->i_private);			\
> > +	}								\
> > +	static const struct file_operations svs_##name##_debug_fops = {	\
> > +		.owner = THIS_MODULE,					\
> > +		.open = svs_##name##_debug_open,			\
> > +		.read = seq_read,					\
> > +		.write = svs_##name##_debug_write,			\
> > +		.llseek = seq_lseek,					\
> > +		.release = single_release,				\
> > +	}
> > +
> > +#define svs_dentry(name)	{__stringify(name), &svs_##name##_debug_fops}
> > +
> >   static DEFINE_SPINLOCK(mtk_svs_lock);
> >   
> >   /*
> > @@ -83,6 +118,7 @@ enum svsb_phase {
> >   	SVSB_PHASE_INIT01,
> >   	SVSB_PHASE_INIT02,
> >   	SVSB_PHASE_MON,
> > +	SVSB_PHASE_NUM,
> 
> I would move the addition of these last members in the previous (3/7) patch,
> where you introduce the driver in the first place.
> 
> Also, I think that using _MAX instead would be better, as it is pretty
> much a common practice. So, this would become SVSB_PHASE_MAX.

Okay. I'll move it to previous (3/7) patch. Thanks for advice.

> 
> >   };
> >   
> >   enum svs_reg_index {
> > @@ -140,6 +176,7 @@ enum svs_reg_index {
> >   	SPARE2,
> >   	SPARE3,
> >   	THSLPEVEB,
> > +	SVS_REG_NUM,
> 
> ... and this would become SVS_REG_MAX

Okay. I'll move it to previous (3/7) patch. Thanks for advice.

> 
> >   };
> >   
> >   static const u32 svs_regs_v2[] = {
> 
> Apart from that,
> 
> Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> 


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[PATCH v16 5/7] dt-bindings: soc: mediatek: add mt8192 svs dt-bindings

[Roger Lu]

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/soc/mediatek/mtk-svs.yaml         | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml b/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
index a855ced410f8..59342e627b67 100644
--- a/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
+++ b/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
@@ -22,6 +22,7 @@ properties:
   compatible:
     enum:
       - mediatek,mt8183-svs
+      - mediatek,mt8192-svs
 
   reg:
     maxItems: 1
@@ -51,6 +52,13 @@ properties:
       - const: svs-calibration-data
       - const: t-calibration-data
 
+  resets:
+    maxItems: 1
+
+  reset-names:
+    items:
+      - const: svs_rst
+
 required:
   - compatible
   - reg
-- 
2.18.0
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[PATCH v16 6/7] arm64: dts: mt8192: add svs device information

[Roger Lu]

add compitable/reg/irq/clock/efuse/reset setting in svs node

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
---
 arch/arm64/boot/dts/mediatek/mt8192.dtsi | 34 ++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
index fe24cc66ff7a..e9816a56d87b 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
@@ -270,6 +270,14 @@
 			compatible = "mediatek,mt8192-infracfg", "syscon";
 			reg = <0 0x10001000 0 0x1000>;
 			#clock-cells = <1>;
+
+			infracfg_rst: reset-controller {
+				compatible = "mediatek,infra-reset", "ti,syscon-reset";
+				#reset-cells = <1>;
+				ti,reset-bits = <
+					0x150 5 0x154 5 0 0     (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* 0: svs */
+				>;
+			};
 		};
 
 		pericfg: syscon@10003000 {
@@ -564,6 +572,20 @@
 			status = "disabled";
 		};
 
+		svs: svs@1100b000 {
+			compatible = "mediatek,mt8192-svs";
+			reg = <0 0x1100b000 0 0x1000>;
+			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH 0>;
+			clocks = <&infracfg CLK_INFRA_THERM>;
+			clock-names = "main";
+			nvmem-cells = <&svs_calibration>,
+				      <&lvts_e_data1>;
+			nvmem-cell-names = "svs-calibration-data",
+					   "t-calibration-data";
+			resets = <&infracfg_rst 0>;
+			reset-names = "svs_rst";
+		};
+
 		spi1: spi@11010000 {
 			compatible = "mediatek,mt8192-spi",
 				     "mediatek,mt6765-spi";
@@ -681,6 +703,18 @@
 			#clock-cells = <1>;
 		};
 
+		efuse: efuse@11c10000 {
+			compatible = "mediatek,efuse";
+			reg = <0 0x11c10000 0 0x1000>;
+
+			lvts_e_data1: data1 {
+				reg = <0x1C0 0x58>;
+			};
+			svs_calibration: calib@580 {
+				reg = <0x580 0x68>;
+			};
+		};
+
 		i2c3: i2c3@11cb0000 {
 			compatible = "mediatek,mt8192-i2c";
 			reg = <0 0x11cb0000 0 0x1000>,
-- 
2.18.0
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Re: [PATCH v16 6/7] arm64: dts: mt8192: add svs device information

[AngeloGioacchino Del Regno]

Il 28/04/21 08:54, Roger Lu ha scritto:
> add compitable/reg/irq/clock/efuse/reset setting in svs node
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 34 ++++++++++++++++++++++++
>   1 file changed, 34 insertions(+)
> 

Hello Roger,
thanks for this series! However, there is an issue with this patch:

> diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> index fe24cc66ff7a..e9816a56d87b 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> @@ -270,6 +270,14 @@
>   			compatible = "mediatek,mt8192-infracfg", "syscon";
>   			reg = <0 0x10001000 0 0x1000>;
>   			#clock-cells = <1>;
> +
> +			infracfg_rst: reset-controller {
> +				compatible = "mediatek,infra-reset", "ti,syscon-reset";
> +				#reset-cells = <1>;
> +				ti,reset-bits = <
> +					0x150 5 0x154 5 0 0     (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* 0: svs */

You are using macros here, which are defined in dt-bindings/reset/ti-syscon.h
hovever, you are not including this header in this devicetree, so it's not
compiling.

Please fix it.

> +				>;
> +			};
>   		};
>   
>   		pericfg: syscon@10003000 {
> @@ -564,6 +572,20 @@
>   			status = "disabled";
>   		};
>   
> +		svs: svs@1100b000 {
> +			compatible = "mediatek,mt8192-svs";
> +			reg = <0 0x1100b000 0 0x1000>;
> +			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH 0>;
> +			clocks = <&infracfg CLK_INFRA_THERM>;
> +			clock-names = "main";
> +			nvmem-cells = <&svs_calibration>,
> +				      <&lvts_e_data1>;
> +			nvmem-cell-names = "svs-calibration-data",
> +					   "t-calibration-data";
> +			resets = <&infracfg_rst 0>;
> +			reset-names = "svs_rst";
> +		};
> +
>   		spi1: spi@11010000 {
>   			compatible = "mediatek,mt8192-spi",
>   				     "mediatek,mt6765-spi";
> @@ -681,6 +703,18 @@
>   			#clock-cells = <1>;
>   		};
>   
> +		efuse: efuse@11c10000 {
> +			compatible = "mediatek,efuse";
> +			reg = <0 0x11c10000 0 0x1000>;
> +

arch/arm64/boot/dts/mediatek/mt8192.dtsi:510.5-24: Warning (reg_format): 
/soc/efuse@11c10000/data1:reg: property has invalid length (8 bytes) 
(#address-cells == 2, #size-cells == 1)

arch/arm64/boot/dts/mediatek/mt8192.dtsi:513.5-24: Warning (reg_format): 
/soc/efuse@11c10000/calib@580:reg: property has invalid length (8 bytes) 
(#address-cells == 2, #size-cells == 1)


In short, you should add here:
			#address-cells = <1>;
			#size-cells = <1>;

> +			lvts_e_data1: data1 {
> +				reg = <0x1C0 0x58>;
> +			};
> +			svs_calibration: calib@580 {
> +				reg = <0x580 0x68>;
> +			};
> +		};
> +
>   		i2c3: i2c3@11cb0000 {
>   			compatible = "mediatek,mt8192-i2c";
>   			reg = <0 0x11cb0000 0 0x1000>,
> 

Regards,
- Angelo

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Re: [PATCH v16 6/7] arm64: dts: mt8192: add svs device information

[Roger Lu]

Hi AngeloGioacchino,

Sorry for the late reply.

On Wed, 2021-10-20 at 17:16 +0200, AngeloGioacchino Del Regno wrote:
> Il 28/04/21 08:54, Roger Lu ha scritto:
> > add compitable/reg/irq/clock/efuse/reset setting in svs node
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 34 ++++++++++++++++++++++++
> >   1 file changed, 34 insertions(+)
> > 
> 
> Hello Roger,
> thanks for this series! However, there is an issue with this patch:
> 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > index fe24cc66ff7a..e9816a56d87b 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> > @@ -270,6 +270,14 @@
> >   			compatible = "mediatek,mt8192-infracfg", "syscon";
> >   			reg = <0 0x10001000 0 0x1000>;
> >   			#clock-cells = <1>;
> > +
> > +			infracfg_rst: reset-controller {
> > +				compatible = "mediatek,infra-reset", "ti,syscon-
> > reset";
> > +				#reset-cells = <1>;
> > +				ti,reset-bits = <
> > +					0x150 5 0x154 5 0 0     (ASSERT_SET |
> > DEASSERT_SET | STATUS_NONE) /* 0: svs */
> 
> You are using macros here, which are defined in dt-bindings/reset/ti-syscon.h
> hovever, you are not including this header in this devicetree, so it's not
> compiling.
> 
> Please fix it.

Sure, I'll fix it. Thanks for the heads-up.

> 
> > +				>;
> > +			};
> >   		};
> >   
> >   		pericfg: syscon@10003000 {
> > @@ -564,6 +572,20 @@
> >   			status = "disabled";
> >   		};
> >   
> > +		svs: svs@1100b000 {
> > +			compatible = "mediatek,mt8192-svs";
> > +			reg = <0 0x1100b000 0 0x1000>;
> > +			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH 0>;
> > +			clocks = <&infracfg CLK_INFRA_THERM>;
> > +			clock-names = "main";
> > +			nvmem-cells = <&svs_calibration>,
> > +				      <&lvts_e_data1>;
> > +			nvmem-cell-names = "svs-calibration-data",
> > +					   "t-calibration-data";
> > +			resets = <&infracfg_rst 0>;
> > +			reset-names = "svs_rst";
> > +		};
> > +
> >   		spi1: spi@11010000 {
> >   			compatible = "mediatek,mt8192-spi",
> >   				     "mediatek,mt6765-spi";
> > @@ -681,6 +703,18 @@
> >   			#clock-cells = <1>;
> >   		};
> >   
> > +		efuse: efuse@11c10000 {
> > +			compatible = "mediatek,efuse";
> > +			reg = <0 0x11c10000 0 0x1000>;
> > +
> 
> arch/arm64/boot/dts/mediatek/mt8192.dtsi:510.5-24: Warning (reg_format): 
> /soc/efuse@11c10000/data1:reg: property has invalid length (8 bytes) 
> (#address-cells == 2, #size-cells == 1)
> 
> arch/arm64/boot/dts/mediatek/mt8192.dtsi:513.5-24: Warning (reg_format): 
> /soc/efuse@11c10000/calib@580:reg: property has invalid length (8 bytes) 
> (#address-cells == 2, #size-cells == 1)
> 
> 
> In short, you should add here:
> 			#address-cells = <1>;
> 			#size-cells = <1>;

Thanks for the example code and I will add them in the latest patch.

> 
> > +			lvts_e_data1: data1 {
> > +				reg = <0x1C0 0x58>;
> > +			};
> > +			svs_calibration: calib@580 {
> > +				reg = <0x580 0x68>;
> > +			};
> > +		};
> > +
> >   		i2c3: i2c3@11cb0000 {
> >   			compatible = "mediatek,mt8192-i2c";
> >   			reg = <0 0x11cb0000 0 0x1000>,
> > 
> 
> Regards,
> - Angelo


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Re: [PATCH v16 6/7] arm64: dts: mt8192: add svs device information

[AngeloGioacchino Del Regno]

Il 28/04/21 08:54, Roger Lu ha scritto:
> add compitable/reg/irq/clock/efuse/reset setting in svs node
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8192.dtsi | 34 ++++++++++++++++++++++++
>   1 file changed, 34 insertions(+)
> 

Hello Roger,

thanks for this series! However, there is an issue with this patch:

> diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> index fe24cc66ff7a..e9816a56d87b 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> @@ -270,6 +270,14 @@
>   			compatible = "mediatek,mt8192-infracfg", "syscon";
>   			reg = <0 0x10001000 0 0x1000>;
>   			#clock-cells = <1>;
> +
> +			infracfg_rst: reset-controller {
> +				compatible = "mediatek,infra-reset", "ti,syscon-reset";
> +				#reset-cells = <1>;
> +				ti,reset-bits = <
> +					0x150 5 0x154 5 0 0     (ASSERT_SET | DEASSERT_SET | STATUS_NONE) /* 0: svs */

You are using macros here, which are defined in dt-bindings/reset/ti-syscon.h

hovever, you are not including this header in this devicetree, so it's not

compiling.



Please fix it.

> +				>;
> +			};
>   		};
>   
>   		pericfg: syscon@10003000 {
> @@ -564,6 +572,20 @@
>   			status = "disabled";
>   		};
>   
> +		svs: svs@1100b000 {
> +			compatible = "mediatek,mt8192-svs";
> +			reg = <0 0x1100b000 0 0x1000>;
> +			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH 0>;
> +			clocks = <&infracfg CLK_INFRA_THERM>;
> +			clock-names = "main";
> +			nvmem-cells = <&svs_calibration>,
> +				      <&lvts_e_data1>;
> +			nvmem-cell-names = "svs-calibration-data",
> +					   "t-calibration-data";
> +			resets = <&infracfg_rst 0>;
> +			reset-names = "svs_rst";
> +		};
> +
>   		spi1: spi@11010000 {
>   			compatible = "mediatek,mt8192-spi",
>   				     "mediatek,mt6765-spi";
> @@ -681,6 +703,18 @@
>   			#clock-cells = <1>;
>   		};
>   
> +		efuse: efuse@11c10000 {
> +			compatible = "mediatek,efuse";
> +			reg = <0 0x11c10000 0 0x1000>;
> +

arch/arm64/boot/dts/mediatek/mt8192.dtsi:510.5-24: Warning (reg_format): 
/soc/efuse@11c10000/data1:reg: property has invalid length (8 bytes) 
(#address-cells == 2, #size-cells == 1)



arch/arm64/boot/dts/mediatek/mt8192.dtsi:513.5-24: Warning (reg_format): 
/soc/efuse@11c10000/calib@580:reg: property has invalid length (8 bytes) 
(#address-cells == 2, #size-cells == 1)





In short, you should add here:

             #address-cells = <1>;

             #size-cells = <1>;

> +			lvts_e_data1: data1 {
> +				reg = <0x1C0 0x58>;
> +			};
> +			svs_calibration: calib@580 {
> +				reg = <0x580 0x68>;
> +			};
> +		};
> +
>   		i2c3: i2c3@11cb0000 {
>   			compatible = "mediatek,mt8192-i2c";
>   			reg = <0 0x11cb0000 0 0x1000>,
> 

P.S.: Sorry for the double email, the previous one got sent with the wrong
       address.


Regards,

- Angelo

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v16 7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver

[Roger Lu]

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
---
 drivers/soc/mediatek/mtk-svs.c | 485 ++++++++++++++++++++++++++++++++-
 1 file changed, 479 insertions(+), 6 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index 8794a2d87baa..9a0cc9cbf679 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -36,6 +36,10 @@
 #define SVSB_CCI			BIT(2)
 #define SVSB_GPU			BIT(3)
 
+/* svs bank 2-line type */
+#define SVSB_LOW			BIT(4)
+#define SVSB_HIGH			BIT(5)
+
 /* svs bank mode support */
 #define SVSB_MODE_ALL_DISABLE		0
 #define SVSB_MODE_INIT01		BIT(1)
@@ -323,6 +327,7 @@ struct svs_platform {
  * @volts: bank voltages
  * @reg_data: bank register data of each phase
  * @freq_base: reference frequency for bank init
+ * @turn_freq_base: refenrece frequency for turn point
  * @vboot: voltage request for bank init01 stage only
  * @volt_step: bank voltage step
  * @volt_base: bank voltage base
@@ -343,6 +348,8 @@ struct svs_platform {
  * @hw_id: bank hardware identification
  * @ctl0: bank thermal sensor selection
  * @cpu_id: cpu core id for SVS CPU only
+ * @turn_pt: turn point informs which opp_volt calculated by high/low bank.
+ * @type: bank type to represent it is 2-line (high/low) bank or 1-line bank.
  *
  * Other structure members which are not listed above are svs platform
  * efuse data for bank init
@@ -371,6 +378,7 @@ struct svs_bank {
 	u32 volts[16];
 	u32 reg_data[SVSB_PHASE_NUM][SVS_REG_NUM];
 	u32 freq_base;
+	u32 turn_freq_base;
 	u32 vboot;
 	u32 volt_step;
 	u32 volt_base;
@@ -410,6 +418,8 @@ struct svs_bank {
 	u32 hw_id;
 	u32 ctl0;
 	u32 cpu_id;
+	u32 turn_pt;
+	u32 type;
 };
 
 static u32 percent(u32 numerator, u32 denominator)
@@ -445,6 +455,37 @@ static u32 svs_bank_volt_to_opp_volt(u32 svsb_volt, u32 svsb_volt_step,
 	return (svsb_volt * svsb_volt_step) + svsb_volt_base;
 }
 
+static u32 svs_opp_volt_to_bank_volt(u32 opp_u_volt, u32 svsb_volt_step,
+				     u32 svsb_volt_base)
+{
+	return (opp_u_volt - svsb_volt_base) / svsb_volt_step;
+}
+
+static int svs_sync_bank_volts_from_opp(struct svs_bank *svsb)
+{
+	struct dev_pm_opp *opp;
+	u32 i, opp_u_volt;
+
+	for (i = 0; i < svsb->opp_count; i++) {
+		opp = dev_pm_opp_find_freq_exact(svsb->opp_dev,
+						 svsb->opp_freqs[i],
+						 true);
+		if (IS_ERR(opp)) {
+			dev_err(svsb->dev, "cannot find freq = %u (%ld)\n",
+				svsb->opp_freqs[i], PTR_ERR(opp));
+			return PTR_ERR(opp);
+		}
+
+		opp_u_volt = dev_pm_opp_get_voltage(opp);
+		svsb->volts[i] = svs_opp_volt_to_bank_volt(opp_u_volt,
+							   svsb->volt_step,
+							   svsb->volt_base);
+		dev_pm_opp_put(opp);
+	}
+
+	return 0;
+}
+
 static int svs_get_bank_zone_temperature(const char *tzone_name,
 					 int *tzone_temp)
 {
@@ -460,7 +501,7 @@ static int svs_get_bank_zone_temperature(const char *tzone_name,
 static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool force_update)
 {
 	int tzone_temp = 0, ret = -EPERM;
-	u32 i, svsb_volt, opp_volt, temp_offset = 0;
+	u32 i, svsb_volt, opp_volt, temp_offset = 0, opp_start, opp_stop;
 
 	mutex_lock(&svsb->lock);
 
@@ -474,6 +515,21 @@ static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool force_update)
 		goto unlock_mutex;
 	}
 
+	/*
+	 * 2-line bank updates its corresponding opp volts.
+	 * 1-line bank updates all opp volts.
+	 */
+	if (svsb->type == SVSB_HIGH) {
+		opp_start = 0;
+		opp_stop = svsb->turn_pt;
+	} else if (svsb->type == SVSB_LOW) {
+		opp_start = svsb->turn_pt;
+		opp_stop = svsb->opp_count;
+	} else {
+		opp_start = 0;
+		opp_stop = svsb->opp_count;
+	}
+
 	/* Get thermal effect */
 	if (svsb->phase == SVSB_PHASE_MON) {
 		if (svsb->temp > svsb->temp_upper_bound &&
@@ -495,10 +551,16 @@ static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool force_update)
 			temp_offset += svsb->tzone_high_temp_offset;
 		else if (tzone_temp <= svsb->tzone_low_temp)
 			temp_offset += svsb->tzone_low_temp_offset;
+
+		/* 2-line bank takes thermal factor to update all opp volts */
+		if (svsb->type == SVSB_HIGH || svsb->type == SVSB_LOW) {
+			opp_start = 0;
+			opp_stop = svsb->opp_count;
+		}
 	}
 
 	/* vmin <= svsb_volt (opp_volt) <= signed-off (default) voltage */
-	for (i = 0; i < svsb->opp_count; i++) {
+	for (i = opp_start; i < opp_stop; i++) {
 		if (svsb->phase == SVSB_PHASE_MON) {
 			svsb_volt = max(svsb->volts[i] + svsb->volt_offset +
 					temp_offset, svsb->vmin);
@@ -549,6 +611,184 @@ static u32 interpolate(u32 f0, u32 f1, u32 v0, u32 v1, u32 fx)
 	return DIV_ROUND_UP(vx, 100);
 }
 
+static void svs_get_vops_v3(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+	u32 i, vop_i, *vop, vop74, vop30, mask7_0 = GENMASK(7, 0);
+	u32 b_sft, bits8 = 8, shift_byte = 0, reg_4bytes = 4;
+	u32 middle_index = (svsb->opp_count / 2);
+	u32 opp_start = 0, opp_stop = 0, turn_pt = svsb->turn_pt;
+
+	if (svsb->phase == SVSB_PHASE_MON &&
+	    svsb->volt_flags & SVSB_MON_VOLT_IGNORE)
+		return;
+
+	vop74 = svs_readl(svsp, VOP74);
+	vop30 = svs_readl(svsp, VOP30);
+
+	if (turn_pt < middle_index) {
+		if (svsb->type == SVSB_HIGH) {
+			/* We attain volts[0 ~ (turn_pt - 1)] */
+			for (i = 0; i < turn_pt; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				vop = (shift_byte < reg_4bytes) ? &vop30 :
+								  &vop74;
+				svsb->volts[i] = (*vop >> b_sft) & mask7_0;
+				shift_byte++;
+			}
+		} else if (svsb->type == SVSB_LOW) {
+			/*
+			 * We attain volts[turn_pt] +
+			 * volts[vop_i ~ (opp_count - 1)]
+			 */
+			vop_i = svsb->opp_count - 7;
+			svsb->volts[turn_pt] = vop30 & mask7_0;
+			shift_byte++;
+			for (i = vop_i; i < svsb->opp_count; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				vop = (shift_byte < reg_4bytes) ? &vop30 :
+								  &vop74;
+				svsb->volts[i] = (*vop >> b_sft) & mask7_0;
+				shift_byte++;
+			}
+
+			/*
+			 * We attain volts[turn_pt + 1 ~ (vop_i - 1)]
+			 * by interpolate
+			 */
+			for (i = turn_pt + 1; i < vop_i; i++)
+				svsb->volts[i] =
+					interpolate(svsb->freqs_pct[turn_pt],
+						    svsb->freqs_pct[vop_i],
+						    svsb->volts[turn_pt],
+						    svsb->volts[vop_i],
+						    svsb->freqs_pct[i]);
+		}
+	} else {
+		if (svsb->type == SVSB_HIGH) {
+			/* We attain volts[0] + volts[vop_i ~ (turn_pt - 1)] */
+			vop_i = turn_pt - 7;
+			svsb->volts[0] = vop30 & mask7_0;
+			shift_byte++;
+			for (i = vop_i; i < turn_pt; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				vop = (shift_byte < reg_4bytes) ? &vop30 :
+								  &vop74;
+				svsb->volts[i] = (*vop >> b_sft) & mask7_0;
+				shift_byte++;
+			}
+
+			/* We attain volts[1 ~ (vop_i - 1)] by interpolate */
+			for (i = 1; i < vop_i; i++)
+				svsb->volts[i] =
+					interpolate(svsb->freqs_pct[0],
+						    svsb->freqs_pct[vop_i],
+						    svsb->volts[0],
+						    svsb->volts[vop_i],
+						    svsb->freqs_pct[i]);
+		} else if (svsb->type == SVSB_LOW) {
+			/* We attain volts[turn_pt ~ (opp_count - 1)] */
+			for (i = turn_pt; i < svsb->opp_count; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				vop = (shift_byte < reg_4bytes) ? &vop30 :
+								  &vop74;
+				svsb->volts[i] = (*vop >> b_sft) & mask7_0;
+				shift_byte++;
+			}
+		}
+	}
+
+	if (svsb->volt_flags & SVSB_INIT02_RM_DVTFIXED) {
+		if (svsb->type == SVSB_HIGH) {
+			opp_start = 0;
+			opp_stop = svsb->turn_pt;
+		} else if (svsb->type == SVSB_LOW) {
+			opp_start = svsb->turn_pt;
+			opp_stop = svsb->opp_count;
+		}
+
+		for (i = opp_start; i < opp_stop; i++)
+			svsb->volts[i] -= svsb->dvt_fixed;
+	}
+}
+
+static void svs_set_freqs_pct_v3(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb = svsp->pbank;
+	u32 i, freq_i, *freq_pct, freq_pct74 = 0;
+	u32 freq_pct30 = svsb->freqs_pct[0];
+	u32 b_sft, bits8 = 8, shift_byte = 0, reg_4bytes = 4;
+	u32 middle_index = (svsb->opp_count / 2);
+	u32 turn_pt = middle_index;
+
+	for (i = 0; i < svsb->opp_count; i++) {
+		if (svsb->opp_freqs[i] <= svsb->turn_freq_base) {
+			svsb->turn_pt = i;
+			break;
+		}
+	}
+
+	turn_pt = svsb->turn_pt;
+
+	/* Target is to fill out freq_pct74 / freq_pct30 */
+	if (turn_pt < middle_index) {
+		if (svsb->type == SVSB_HIGH) {
+			/* We select freqs_pct[0 ~ (turn_pt - 1)] */
+			for (i = 0; i < turn_pt; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				freq_pct = (shift_byte < reg_4bytes) ?
+					   &freq_pct30 : &freq_pct74;
+				*freq_pct |= (svsb->freqs_pct[i] << b_sft);
+				shift_byte++;
+			}
+		} else if (svsb->type == SVSB_LOW) {
+			/*
+			 * We select freqs_pct[turn_pt] +
+			 * freqs_pct[(opp_count - 7) ~ (opp_count -1)]
+			 */
+			freq_pct30 = svsb->freqs_pct[turn_pt];
+			shift_byte++;
+			freq_i = svsb->opp_count - 7;
+			for (i = freq_i; i < svsb->opp_count; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				freq_pct = (shift_byte < reg_4bytes) ?
+					   &freq_pct30 : &freq_pct74;
+				*freq_pct |= (svsb->freqs_pct[i] << b_sft);
+				shift_byte++;
+			}
+		}
+	} else {
+		if (svsb->type == SVSB_HIGH) {
+			/*
+			 * We select freqs_pct[0] +
+			 * freqs_pct[(turn_pt - 7) ~ (turn_pt - 1)]
+			 */
+			freq_pct30 = svsb->freqs_pct[0];
+			shift_byte++;
+			freq_i = turn_pt - 7;
+			for (i = freq_i; i < turn_pt; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				freq_pct = (shift_byte < reg_4bytes) ?
+					   &freq_pct30 : &freq_pct74;
+				*freq_pct |= (svsb->freqs_pct[i] << b_sft);
+				shift_byte++;
+			}
+		} else if (svsb->type == SVSB_LOW) {
+			/* We select freqs_pct[turn_pt ~ (opp_count - 1)] */
+			for (i = turn_pt; i < svsb->opp_count; i++) {
+				b_sft = bits8 * (shift_byte % reg_4bytes);
+				freq_pct = (shift_byte < reg_4bytes) ?
+					   &freq_pct30 : &freq_pct74;
+				*freq_pct |= (svsb->freqs_pct[i] << b_sft);
+				shift_byte++;
+			}
+		}
+	}
+
+	svs_writel(svsp, freq_pct74, FREQPCT74);
+	svs_writel(svsp, freq_pct30, FREQPCT30);
+}
+
 static void svs_get_vops_v2(struct svs_platform *svsp)
 {
 	struct svs_bank *svsb = svsp->pbank;
@@ -868,6 +1108,25 @@ static int svs_init02(struct svs_platform *svsp)
 		}
 	}
 
+	/*
+	 * 2-line high/low bank update its corresponding opp voltages only.
+	 * Therefore, we sync voltages from opp for high/low bank voltages
+	 * consistency.
+	 */
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (!(svsb->mode_support & SVSB_MODE_INIT02))
+			continue;
+
+		if (svsb->type == SVSB_HIGH || svsb->type == SVSB_LOW) {
+			if (svs_sync_bank_volts_from_opp(svsb)) {
+				dev_err(svsb->dev, "sync volt fail\n");
+				return -EPERM;
+			}
+		}
+	}
+
 	return 0;
 }
 
@@ -1114,7 +1373,12 @@ static int svs_resource_setup(struct svs_platform *svsp)
 			svsb->name = "SVSB_CCI";
 			break;
 		case SVSB_GPU:
-			svsb->name = "SVSB_GPU";
+			if (svsb->type == SVSB_HIGH)
+				svsb->name = "SVSB_GPU_HIGH";
+			else if (svsb->type == SVSB_LOW)
+				svsb->name = "SVSB_GPU_LOW";
+			else
+				svsb->name = "SVSB_GPU";
 			break;
 		default:
 			WARN_ON(1);
@@ -1176,6 +1440,88 @@ static int svs_resource_setup(struct svs_platform *svsp)
 	return 0;
 }
 
+static bool svs_mt8192_efuse_parsing(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	struct nvmem_cell *cell;
+	u32 idx, i, ft_pgm, vmin, golden_temp;
+
+	for (i = 0; i < svsp->efuse_num; i++)
+		if (svsp->efuse[i])
+			dev_info(svsp->dev, "M_HW_RES%d: 0x%08x\n",
+				 i, svsp->efuse[i]);
+
+	/* Svs efuse parsing */
+	ft_pgm = svsp->efuse[0] & GENMASK(7, 0);
+	vmin = (svsp->efuse[19] >> 4) & GENMASK(1, 0);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (svsb->sw_id != SVSB_GPU)
+			return false;
+
+		if (vmin == 0x1)
+			svsb->vmin = 0x1e;
+
+		if (ft_pgm == 0)
+			svsb->volt_flags |= SVSB_INIT01_VOLT_IGNORE;
+
+		if (svsb->type == SVSB_LOW) {
+			svsb->mtdes = svsp->efuse[10] & GENMASK(7, 0);
+			svsb->bdes = (svsp->efuse[10] >> 16) & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[10] >> 24) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[17]) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[17] >> 8) & GENMASK(7, 0);
+			svsb->vmax += svsb->dvt_fixed;
+		} else if (svsb->type == SVSB_HIGH) {
+			svsb->mtdes = svsp->efuse[9] & GENMASK(7, 0);
+			svsb->bdes = (svsp->efuse[9] >> 16) & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[9] >> 24) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[17] >> 16) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[17] >> 24) & GENMASK(7, 0);
+			svsb->vmax += svsb->dvt_fixed;
+		}
+	}
+
+	/* Thermal efuse parsing */
+	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
+	if (IS_ERR_OR_NULL(cell)) {
+		dev_err(svsp->dev, "no thermal cell, no mon mode\n");
+		for (idx = 0; idx < svsp->bank_num; idx++) {
+			svsb = &svsp->banks[idx];
+			svsb->mode_support &= ~SVSB_MODE_MON;
+		}
+
+		return true;
+	}
+
+	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_num);
+	svsp->tefuse_num /= sizeof(u32);
+	nvmem_cell_put(cell);
+
+	for (i = 0; i < svsp->tefuse_num; i++)
+		if (svsp->tefuse[i] != 0)
+			break;
+
+	if (i == svsp->tefuse_num)
+		golden_temp = 50; /* All thermal efuse data are 0 */
+	else
+		golden_temp = (svsp->tefuse[0] >> 24) & GENMASK(7, 0);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (svsb->sw_id != SVSB_GPU)
+			return false;
+
+		svsb->mts = 500;
+		svsb->bts = (((500 * golden_temp + 250460) / 1000) - 25) * 4;
+	}
+
+	return true;
+}
+
 static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
 {
 	struct thermal_parameter tp;
@@ -1598,10 +1944,11 @@ static int svs_status_debug_show(struct seq_file *m, void *v)
 
 	ret = svs_get_bank_zone_temperature(svsb->tzone_name, &tzone_temp);
 	if (ret)
-		seq_printf(m, "%s: no \"%s\" zone?\n", svsb->name,
-			   svsb->tzone_name);
+		seq_printf(m, "%s: no \"%s\" zone? turn_pt = %u\n",
+			   svsb->name, svsb->tzone_name, svsb->turn_pt);
 	else
-		seq_printf(m, "%s: temperature = %d\n", svsb->name, tzone_temp);
+		seq_printf(m, "%s: temperature = %d, turn_pt = %u\n",
+			   svsb->name, tzone_temp, svsb->turn_pt);
 
 	for (i = 0; i < svsb->opp_count; i++) {
 		opp = dev_pm_opp_find_freq_exact(svsb->opp_dev,
@@ -1734,6 +2081,89 @@ static int svs_create_svs_debug_cmds(struct svs_platform *svsp)
 	return 0;
 }
 
+static struct svs_bank svs_mt8192_banks[] = {
+	{
+		.sw_id			= SVSB_GPU,
+		.set_freqs_pct		= svs_set_freqs_pct_v3,
+		.get_vops		= svs_get_vops_v3,
+		.hw_id			= 0,
+		.tzone_name		= "gpu1",
+		.buck_name		= "mali",
+		.volt_flags		= SVSB_INIT02_RM_DVTFIXED |
+					  SVSB_MON_VOLT_IGNORE,
+		.mode_support		= SVSB_MODE_INIT02,
+		.opp_count		= 16,
+		.freq_base		= 688000000,
+		.turn_freq_base		= 688000000,
+		.vboot			= 0x38,
+		.volt_step		= 6250,
+		.volt_base		= 400000,
+		.volt_offset		= 0,
+		.vmax			= 0x60,
+		.vmin			= 0x1a,
+		.dthi			= 0x1,
+		.dtlo			= 0xfe,
+		.det_window		= 0xa28,
+		.det_max		= 0xffff,
+		.age_config		= 0x555555,
+		.agem			= 0,
+		.dc_config		= 0x1,
+		.dvt_fixed		= 0x1,
+		.vco			= 0x18,
+		.chk_shift		= 0x87,
+		.temp_upper_bound	= 0x64,
+		.temp_lower_bound	= 0xb2,
+		.tzone_high_temp	= 85000,
+		.tzone_high_temp_offset	= 0,
+		.tzone_low_temp		= 25000,
+		.tzone_low_temp_offset	= 7,
+		.core_sel		= 0x0fff0100,
+		.int_st			= BIT(0),
+		.ctl0			= 0x00540003,
+		.type			= SVSB_LOW,
+	},
+	{
+		.sw_id			= SVSB_GPU,
+		.set_freqs_pct		= svs_set_freqs_pct_v3,
+		.get_vops		= svs_get_vops_v3,
+		.hw_id			= 1,
+		.tzone_name		= "gpu1",
+		.buck_name		= "mali",
+		.volt_flags		= SVSB_INIT02_RM_DVTFIXED |
+					  SVSB_MON_VOLT_IGNORE,
+		.mode_support		= SVSB_MODE_INIT02 | SVSB_MODE_MON,
+		.opp_count		= 16,
+		.freq_base		= 902000000,
+		.turn_freq_base		= 688000000,
+		.vboot			= 0x38,
+		.volt_step		= 6250,
+		.volt_base		= 400000,
+		.volt_offset		= 0,
+		.vmax			= 0x60,
+		.vmin			= 0x1a,
+		.dthi			= 0x1,
+		.dtlo			= 0xfe,
+		.det_window		= 0xa28,
+		.det_max		= 0xffff,
+		.age_config		= 0x555555,
+		.agem			= 0,
+		.dc_config		= 0x1,
+		.dvt_fixed		= 0x6,
+		.vco			= 0x18,
+		.chk_shift		= 0x87,
+		.temp_upper_bound	= 0x64,
+		.temp_lower_bound	= 0xb2,
+		.tzone_high_temp	= 85000,
+		.tzone_high_temp_offset	= 0,
+		.tzone_low_temp		= 25000,
+		.tzone_low_temp_offset	= 7,
+		.core_sel		= 0x0fff0101,
+		.int_st			= BIT(1),
+		.ctl0			= 0x00540003,
+		.type			= SVSB_HIGH,
+	},
+};
+
 static struct svs_bank svs_mt8183_banks[] = {
 	{
 		.sw_id			= SVSB_CPU_LITTLE,
@@ -1888,6 +2318,46 @@ static struct svs_bank svs_mt8183_banks[] = {
 	},
 };
 
+static int svs_get_svs_mt8192_platform_data(struct svs_platform *svsp)
+{
+	struct device *dev;
+	struct svs_bank *svsb;
+	u32 idx;
+
+	svsp->name = "mt8192-svs";
+	svsp->banks = svs_mt8192_banks;
+	svsp->efuse_parsing = svs_mt8192_efuse_parsing;
+	svsp->regs = svs_regs_v2;
+	svsp->irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
+	svsp->bank_num = ARRAY_SIZE(svs_mt8192_banks);
+	svsp->efuse_check = 9;
+
+	svsp->rst = devm_reset_control_get_optional(svsp->dev, "svs_rst");
+	if (IS_ERR(svsp->rst)) {
+		dev_err_probe(svsp->dev, PTR_ERR(svsp->rst),
+			      "cannot get svs reset control\n");
+		return PTR_ERR(svsp->rst);
+	}
+
+	dev = svs_add_device_link(svsp, "lvts");
+	if (IS_ERR(dev))
+		return PTR_ERR(dev);
+
+	for (idx = 0; idx < svsp->bank_num; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (svsb->type == SVSB_HIGH)
+			svsb->opp_dev = svs_add_device_link(svsp, "mali");
+		else if (svsb->type == SVSB_LOW)
+			svsb->opp_dev = svs_get_subsys_device(svsp, "mali");
+
+		if (IS_ERR(svsb->opp_dev))
+			return PTR_ERR(svsb->opp_dev);
+	}
+
+	return 0;
+}
+
 static int svs_get_svs_mt8183_platform_data(struct svs_platform *svsp)
 {
 	struct device *dev;
@@ -1941,6 +2411,9 @@ static const struct of_device_id mtk_svs_of_match[] = {
 	{
 		.compatible = "mediatek,mt8183-svs",
 		.data = &svs_get_svs_mt8183_platform_data,
+	}, {
+		.compatible = "mediatek,mt8192-svs",
+		.data = &svs_get_svs_mt8192_platform_data,
 	}, {
 		/* Sentinel */
 	},
-- 
2.18.0
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v16 7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver

[YT Lee]

On Wed, 2021-04-28 at 14:54 +0800, Roger Lu wrote:
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> ---
>  drivers/soc/mediatek/mtk-svs.c | 485
> ++++++++++++++++++++++++++++++++-
>  1 file changed, 479 insertions(+), 6 deletions(-)
> 

Reviewed-by: YT Lee <yt.lee@mediatek.com>

> diff --git a/drivers/soc/mediatek/mtk-svs.c
> b/drivers/soc/mediatek/mtk-svs.c
> index 8794a2d87baa..9a0cc9cbf679 100644
> --- a/drivers/soc/mediatek/mtk-svs.c
> +++ b/drivers/soc/mediatek/mtk-svs.c
> @@ -36,6 +36,10 @@
>  #define SVSB_CCI			BIT(2)
>  #define SVSB_GPU			BIT(3)
>  
> +/* svs bank 2-line type */
> +#define SVSB_LOW			BIT(4)
> +#define SVSB_HIGH			BIT(5)
> +
>  /* svs bank mode support */
>  #define SVSB_MODE_ALL_DISABLE		0
>  #define SVSB_MODE_INIT01		BIT(1)
> @@ -323,6 +327,7 @@ struct svs_platform {
>   * @volts: bank voltages
>   * @reg_data: bank register data of each phase
>   * @freq_base: reference frequency for bank init
> + * @turn_freq_base: refenrece frequency for turn point
>   * @vboot: voltage request for bank init01 stage only
>   * @volt_step: bank voltage step
>   * @volt_base: bank voltage base
> @@ -343,6 +348,8 @@ struct svs_platform {
>   * @hw_id: bank hardware identification
>   * @ctl0: bank thermal sensor selection
>   * @cpu_id: cpu core id for SVS CPU only
> + * @turn_pt: turn point informs which opp_volt calculated by
> high/low bank.
> + * @type: bank type to represent it is 2-line (high/low) bank or 1-
> line bank.
>   *
>   * Other structure members which are not listed above are svs
> platform
>   * efuse data for bank init
> @@ -371,6 +378,7 @@ struct svs_bank {
>  	u32 volts[16];
>  	u32 reg_data[SVSB_PHASE_NUM][SVS_REG_NUM];
>  	u32 freq_base;
> +	u32 turn_freq_base;
>  	u32 vboot;
>  	u32 volt_step;
>  	u32 volt_base;
> @@ -410,6 +418,8 @@ struct svs_bank {
>  	u32 hw_id;
>  	u32 ctl0;
>  	u32 cpu_id;
> +	u32 turn_pt;
> +	u32 type;
>  };
>  
>  static u32 percent(u32 numerator, u32 denominator)
> @@ -445,6 +455,37 @@ static u32 svs_bank_volt_to_opp_volt(u32
> svsb_volt, u32 svsb_volt_step,
>  	return (svsb_volt * svsb_volt_step) + svsb_volt_base;
>  }
>  
> +static u32 svs_opp_volt_to_bank_volt(u32 opp_u_volt, u32
> svsb_volt_step,
> +				     u32 svsb_volt_base)
> +{
> +	return (opp_u_volt - svsb_volt_base) / svsb_volt_step;
> +}
> +
> +static int svs_sync_bank_volts_from_opp(struct svs_bank *svsb)
> +{
> +	struct dev_pm_opp *opp;
> +	u32 i, opp_u_volt;
> +
> +	for (i = 0; i < svsb->opp_count; i++) {
> +		opp = dev_pm_opp_find_freq_exact(svsb->opp_dev,
> +						 svsb->opp_freqs[i],
> +						 true);
> +		if (IS_ERR(opp)) {
> +			dev_err(svsb->dev, "cannot find freq = %u
> (%ld)\n",
> +				svsb->opp_freqs[i], PTR_ERR(opp));
> +			return PTR_ERR(opp);
> +		}
> +
> +		opp_u_volt = dev_pm_opp_get_voltage(opp);
> +		svsb->volts[i] = svs_opp_volt_to_bank_volt(opp_u_volt,
> +							   svsb-
> >volt_step,
> +							   svsb-
> >volt_base);
> +		dev_pm_opp_put(opp);
> +	}
> +
> +	return 0;
> +}
> +
>  static int svs_get_bank_zone_temperature(const char *tzone_name,
>  					 int *tzone_temp)
>  {
> @@ -460,7 +501,7 @@ static int svs_get_bank_zone_temperature(const
> char *tzone_name,
>  static int svs_adjust_pm_opp_volts(struct svs_bank *svsb, bool
> force_update)
>  {
>  	int tzone_temp = 0, ret = -EPERM;
> -	u32 i, svsb_volt, opp_volt, temp_offset = 0;
> +	u32 i, svsb_volt, opp_volt, temp_offset = 0, opp_start,
> opp_stop;
>  
>  	mutex_lock(&svsb->lock);
>  
> @@ -474,6 +515,21 @@ static int svs_adjust_pm_opp_volts(struct
> svs_bank *svsb, bool force_update)
>  		goto unlock_mutex;
>  	}
>  
> +	/*
> +	 * 2-line bank updates its corresponding opp volts.
> +	 * 1-line bank updates all opp volts.
> +	 */
> +	if (svsb->type == SVSB_HIGH) {
> +		opp_start = 0;
> +		opp_stop = svsb->turn_pt;
> +	} else if (svsb->type == SVSB_LOW) {
> +		opp_start = svsb->turn_pt;
> +		opp_stop = svsb->opp_count;
> +	} else {
> +		opp_start = 0;
> +		opp_stop = svsb->opp_count;
> +	}
> +
>  	/* Get thermal effect */
>  	if (svsb->phase == SVSB_PHASE_MON) {
>  		if (svsb->temp > svsb->temp_upper_bound &&
> @@ -495,10 +551,16 @@ static int svs_adjust_pm_opp_volts(struct
> svs_bank *svsb, bool force_update)
>  			temp_offset += svsb->tzone_high_temp_offset;
>  		else if (tzone_temp <= svsb->tzone_low_temp)
>  			temp_offset += svsb->tzone_low_temp_offset;
> +
> +		/* 2-line bank takes thermal factor to update all opp
> volts */
> +		if (svsb->type == SVSB_HIGH || svsb->type == SVSB_LOW)
> {
> +			opp_start = 0;
> +			opp_stop = svsb->opp_count;
> +		}
>  	}
>  
>  	/* vmin <= svsb_volt (opp_volt) <= signed-off (default) voltage
> */
> -	for (i = 0; i < svsb->opp_count; i++) {
> +	for (i = opp_start; i < opp_stop; i++) {
>  		if (svsb->phase == SVSB_PHASE_MON) {
>  			svsb_volt = max(svsb->volts[i] + svsb-
> >volt_offset +
>  					temp_offset, svsb->vmin);
> @@ -549,6 +611,184 @@ static u32 interpolate(u32 f0, u32 f1, u32 v0,
> u32 v1, u32 fx)
>  	return DIV_ROUND_UP(vx, 100);
>  }
>  
> +static void svs_get_vops_v3(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +	u32 i, vop_i, *vop, vop74, vop30, mask7_0 = GENMASK(7, 0);
> +	u32 b_sft, bits8 = 8, shift_byte = 0, reg_4bytes = 4;
> +	u32 middle_index = (svsb->opp_count / 2);
> +	u32 opp_start = 0, opp_stop = 0, turn_pt = svsb->turn_pt;
> +
> +	if (svsb->phase == SVSB_PHASE_MON &&
> +	    svsb->volt_flags & SVSB_MON_VOLT_IGNORE)
> +		return;
> +
> +	vop74 = svs_readl(svsp, VOP74);
> +	vop30 = svs_readl(svsp, VOP30);
> +
> +	if (turn_pt < middle_index) {
> +		if (svsb->type == SVSB_HIGH) {
> +			/* We attain volts[0 ~ (turn_pt - 1)] */
> +			for (i = 0; i < turn_pt; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				vop = (shift_byte < reg_4bytes) ?
> &vop30 :
> +								  &vop7
> 4;
> +				svsb->volts[i] = (*vop >> b_sft) &
> mask7_0;
> +				shift_byte++;
> +			}
> +		} else if (svsb->type == SVSB_LOW) {
> +			/*
> +			 * We attain volts[turn_pt] +
> +			 * volts[vop_i ~ (opp_count - 1)]
> +			 */
> +			vop_i = svsb->opp_count - 7;
> +			svsb->volts[turn_pt] = vop30 & mask7_0;
> +			shift_byte++;
> +			for (i = vop_i; i < svsb->opp_count; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				vop = (shift_byte < reg_4bytes) ?
> &vop30 :
> +								  &vop7
> 4;
> +				svsb->volts[i] = (*vop >> b_sft) &
> mask7_0;
> +				shift_byte++;
> +			}
> +
> +			/*
> +			 * We attain volts[turn_pt + 1 ~ (vop_i - 1)]
> +			 * by interpolate
> +			 */
> +			for (i = turn_pt + 1; i < vop_i; i++)
> +				svsb->volts[i] =
> +					interpolate(svsb-
> >freqs_pct[turn_pt],
> +						    svsb-
> >freqs_pct[vop_i],
> +						    svsb-
> >volts[turn_pt],
> +						    svsb->volts[vop_i],
> +						    svsb-
> >freqs_pct[i]);
> +		}
> +	} else {
> +		if (svsb->type == SVSB_HIGH) {
> +			/* We attain volts[0] + volts[vop_i ~ (turn_pt
> - 1)] */
> +			vop_i = turn_pt - 7;
> +			svsb->volts[0] = vop30 & mask7_0;
> +			shift_byte++;
> +			for (i = vop_i; i < turn_pt; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				vop = (shift_byte < reg_4bytes) ?
> &vop30 :
> +								  &vop7
> 4;
> +				svsb->volts[i] = (*vop >> b_sft) &
> mask7_0;
> +				shift_byte++;
> +			}
> +
> +			/* We attain volts[1 ~ (vop_i - 1)] by
> interpolate */
> +			for (i = 1; i < vop_i; i++)
> +				svsb->volts[i] =
> +					interpolate(svsb->freqs_pct[0],
> +						    svsb-
> >freqs_pct[vop_i],
> +						    svsb->volts[0],
> +						    svsb->volts[vop_i],
> +						    svsb-
> >freqs_pct[i]);
> +		} else if (svsb->type == SVSB_LOW) {
> +			/* We attain volts[turn_pt ~ (opp_count - 1)]
> */
> +			for (i = turn_pt; i < svsb->opp_count; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				vop = (shift_byte < reg_4bytes) ?
> &vop30 :
> +								  &vop7
> 4;
> +				svsb->volts[i] = (*vop >> b_sft) &
> mask7_0;
> +				shift_byte++;
> +			}
> +		}
> +	}
> +
> +	if (svsb->volt_flags & SVSB_INIT02_RM_DVTFIXED) {
> +		if (svsb->type == SVSB_HIGH) {
> +			opp_start = 0;
> +			opp_stop = svsb->turn_pt;
> +		} else if (svsb->type == SVSB_LOW) {
> +			opp_start = svsb->turn_pt;
> +			opp_stop = svsb->opp_count;
> +		}
> +
> +		for (i = opp_start; i < opp_stop; i++)
> +			svsb->volts[i] -= svsb->dvt_fixed;
> +	}
> +}
> +
> +static void svs_set_freqs_pct_v3(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb = svsp->pbank;
> +	u32 i, freq_i, *freq_pct, freq_pct74 = 0;
> +	u32 freq_pct30 = svsb->freqs_pct[0];
> +	u32 b_sft, bits8 = 8, shift_byte = 0, reg_4bytes = 4;
> +	u32 middle_index = (svsb->opp_count / 2);
> +	u32 turn_pt = middle_index;
> +
> +	for (i = 0; i < svsb->opp_count; i++) {
> +		if (svsb->opp_freqs[i] <= svsb->turn_freq_base) {
> +			svsb->turn_pt = i;
> +			break;
> +		}
> +	}
> +
> +	turn_pt = svsb->turn_pt;
> +
> +	/* Target is to fill out freq_pct74 / freq_pct30 */
> +	if (turn_pt < middle_index) {
> +		if (svsb->type == SVSB_HIGH) {
> +			/* We select freqs_pct[0 ~ (turn_pt - 1)] */
> +			for (i = 0; i < turn_pt; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				freq_pct = (shift_byte < reg_4bytes) ?
> +					   &freq_pct30 : &freq_pct74;
> +				*freq_pct |= (svsb->freqs_pct[i] <<
> b_sft);
> +				shift_byte++;
> +			}
> +		} else if (svsb->type == SVSB_LOW) {
> +			/*
> +			 * We select freqs_pct[turn_pt] +
> +			 * freqs_pct[(opp_count - 7) ~ (opp_count -1)]
> +			 */
> +			freq_pct30 = svsb->freqs_pct[turn_pt];
> +			shift_byte++;
> +			freq_i = svsb->opp_count - 7;
> +			for (i = freq_i; i < svsb->opp_count; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				freq_pct = (shift_byte < reg_4bytes) ?
> +					   &freq_pct30 : &freq_pct74;
> +				*freq_pct |= (svsb->freqs_pct[i] <<
> b_sft);
> +				shift_byte++;
> +			}
> +		}
> +	} else {
> +		if (svsb->type == SVSB_HIGH) {
> +			/*
> +			 * We select freqs_pct[0] +
> +			 * freqs_pct[(turn_pt - 7) ~ (turn_pt - 1)]
> +			 */
> +			freq_pct30 = svsb->freqs_pct[0];
> +			shift_byte++;
> +			freq_i = turn_pt - 7;
> +			for (i = freq_i; i < turn_pt; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				freq_pct = (shift_byte < reg_4bytes) ?
> +					   &freq_pct30 : &freq_pct74;
> +				*freq_pct |= (svsb->freqs_pct[i] <<
> b_sft);
> +				shift_byte++;
> +			}
> +		} else if (svsb->type == SVSB_LOW) {
> +			/* We select freqs_pct[turn_pt ~ (opp_count -
> 1)] */
> +			for (i = turn_pt; i < svsb->opp_count; i++) {
> +				b_sft = bits8 * (shift_byte %
> reg_4bytes);
> +				freq_pct = (shift_byte < reg_4bytes) ?
> +					   &freq_pct30 : &freq_pct74;
> +				*freq_pct |= (svsb->freqs_pct[i] <<
> b_sft);
> +				shift_byte++;
> +			}
> +		}
> +	}
> +
> +	svs_writel(svsp, freq_pct74, FREQPCT74);
> +	svs_writel(svsp, freq_pct30, FREQPCT30);
> +}
> +
>  static void svs_get_vops_v2(struct svs_platform *svsp)
>  {
>  	struct svs_bank *svsb = svsp->pbank;
> @@ -868,6 +1108,25 @@ static int svs_init02(struct svs_platform
> *svsp)
>  		}
>  	}
>  
> +	/*
> +	 * 2-line high/low bank update its corresponding opp voltages
> only.
> +	 * Therefore, we sync voltages from opp for high/low bank
> voltages
> +	 * consistency.
> +	 */
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (!(svsb->mode_support & SVSB_MODE_INIT02))
> +			continue;
> +
> +		if (svsb->type == SVSB_HIGH || svsb->type == SVSB_LOW)
> {
> +			if (svs_sync_bank_volts_from_opp(svsb)) {
> +				dev_err(svsb->dev, "sync volt fail\n");
> +				return -EPERM;
> +			}
> +		}
> +	}
> +
>  	return 0;
>  }
>  
> @@ -1114,7 +1373,12 @@ static int svs_resource_setup(struct
> svs_platform *svsp)
>  			svsb->name = "SVSB_CCI";
>  			break;
>  		case SVSB_GPU:
> -			svsb->name = "SVSB_GPU";
> +			if (svsb->type == SVSB_HIGH)
> +				svsb->name = "SVSB_GPU_HIGH";
> +			else if (svsb->type == SVSB_LOW)
> +				svsb->name = "SVSB_GPU_LOW";
> +			else
> +				svsb->name = "SVSB_GPU";
>  			break;
>  		default:
>  			WARN_ON(1);
> @@ -1176,6 +1440,88 @@ static int svs_resource_setup(struct
> svs_platform *svsp)
>  	return 0;
>  }
>  
> +static bool svs_mt8192_efuse_parsing(struct svs_platform *svsp)
> +{
> +	struct svs_bank *svsb;
> +	struct nvmem_cell *cell;
> +	u32 idx, i, ft_pgm, vmin, golden_temp;
> +
> +	for (i = 0; i < svsp->efuse_num; i++)
> +		if (svsp->efuse[i])
> +			dev_info(svsp->dev, "M_HW_RES%d: 0x%08x\n",
> +				 i, svsp->efuse[i]);
> +
> +	/* Svs efuse parsing */
> +	ft_pgm = svsp->efuse[0] & GENMASK(7, 0);
> +	vmin = (svsp->efuse[19] >> 4) & GENMASK(1, 0);
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (svsb->sw_id != SVSB_GPU)
> +			return false;
> +
> +		if (vmin == 0x1)
> +			svsb->vmin = 0x1e;
> +
> +		if (ft_pgm == 0)
> +			svsb->volt_flags |= SVSB_INIT01_VOLT_IGNORE;
> +
> +		if (svsb->type == SVSB_LOW) {
> +			svsb->mtdes = svsp->efuse[10] & GENMASK(7, 0);
> +			svsb->bdes = (svsp->efuse[10] >> 16) &
> GENMASK(7, 0);
> +			svsb->mdes = (svsp->efuse[10] >> 24) &
> GENMASK(7, 0);
> +			svsb->dcbdet = (svsp->efuse[17]) & GENMASK(7,
> 0);
> +			svsb->dcmdet = (svsp->efuse[17] >> 8) &
> GENMASK(7, 0);
> +			svsb->vmax += svsb->dvt_fixed;
> +		} else if (svsb->type == SVSB_HIGH) {
> +			svsb->mtdes = svsp->efuse[9] & GENMASK(7, 0);
> +			svsb->bdes = (svsp->efuse[9] >> 16) &
> GENMASK(7, 0);
> +			svsb->mdes = (svsp->efuse[9] >> 24) &
> GENMASK(7, 0);
> +			svsb->dcbdet = (svsp->efuse[17] >> 16) &
> GENMASK(7, 0);
> +			svsb->dcmdet = (svsp->efuse[17] >> 24) &
> GENMASK(7, 0);
> +			svsb->vmax += svsb->dvt_fixed;
> +		}
> +	}
> +
> +	/* Thermal efuse parsing */
> +	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
> +	if (IS_ERR_OR_NULL(cell)) {
> +		dev_err(svsp->dev, "no thermal cell, no mon mode\n");
> +		for (idx = 0; idx < svsp->bank_num; idx++) {
> +			svsb = &svsp->banks[idx];
> +			svsb->mode_support &= ~SVSB_MODE_MON;
> +		}
> +
> +		return true;
> +	}
> +
> +	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_num);
> +	svsp->tefuse_num /= sizeof(u32);
> +	nvmem_cell_put(cell);
> +
> +	for (i = 0; i < svsp->tefuse_num; i++)
> +		if (svsp->tefuse[i] != 0)
> +			break;
> +
> +	if (i == svsp->tefuse_num)
> +		golden_temp = 50; /* All thermal efuse data are 0 */
> +	else
> +		golden_temp = (svsp->tefuse[0] >> 24) & GENMASK(7, 0);
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (svsb->sw_id != SVSB_GPU)
> +			return false;
> +
> +		svsb->mts = 500;
> +		svsb->bts = (((500 * golden_temp + 250460) / 1000) -
> 25) * 4;
> +	}
> +
> +	return true;
> +}
> +
>  static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
>  {
>  	struct thermal_parameter tp;
> @@ -1598,10 +1944,11 @@ static int svs_status_debug_show(struct
> seq_file *m, void *v)
>  
>  	ret = svs_get_bank_zone_temperature(svsb->tzone_name,
> &tzone_temp);
>  	if (ret)
> -		seq_printf(m, "%s: no \"%s\" zone?\n", svsb->name,
> -			   svsb->tzone_name);
> +		seq_printf(m, "%s: no \"%s\" zone? turn_pt = %u\n",
> +			   svsb->name, svsb->tzone_name, svsb-
> >turn_pt);
>  	else
> -		seq_printf(m, "%s: temperature = %d\n", svsb->name,
> tzone_temp);
> +		seq_printf(m, "%s: temperature = %d, turn_pt = %u\n",
> +			   svsb->name, tzone_temp, svsb->turn_pt);
>  
>  	for (i = 0; i < svsb->opp_count; i++) {
>  		opp = dev_pm_opp_find_freq_exact(svsb->opp_dev,
> @@ -1734,6 +2081,89 @@ static int svs_create_svs_debug_cmds(struct
> svs_platform *svsp)
>  	return 0;
>  }
>  
> +static struct svs_bank svs_mt8192_banks[] = {
> +	{
> +		.sw_id			= SVSB_GPU,
> +		.set_freqs_pct		= svs_set_freqs_pct_v3,
> +		.get_vops		= svs_get_vops_v3,
> +		.hw_id			= 0,
> +		.tzone_name		= "gpu1",
> +		.buck_name		= "mali",
> +		.volt_flags		= SVSB_INIT02_RM_DVTFIXED |
> +					  SVSB_MON_VOLT_IGNORE,
> +		.mode_support		= SVSB_MODE_INIT02,
> +		.opp_count		= 16,
> +		.freq_base		= 688000000,
> +		.turn_freq_base		= 688000000,
> +		.vboot			= 0x38,
> +		.volt_step		= 6250,
> +		.volt_base		= 400000,
> +		.volt_offset		= 0,
> +		.vmax			= 0x60,
> +		.vmin			= 0x1a,
> +		.dthi			= 0x1,
> +		.dtlo			= 0xfe,
> +		.det_window		= 0xa28,
> +		.det_max		= 0xffff,
> +		.age_config		= 0x555555,
> +		.agem			= 0,
> +		.dc_config		= 0x1,
> +		.dvt_fixed		= 0x1,
> +		.vco			= 0x18,
> +		.chk_shift		= 0x87,
> +		.temp_upper_bound	= 0x64,
> +		.temp_lower_bound	= 0xb2,
> +		.tzone_high_temp	= 85000,
> +		.tzone_high_temp_offset	= 0,
> +		.tzone_low_temp		= 25000,
> +		.tzone_low_temp_offset	= 7,
> +		.core_sel		= 0x0fff0100,
> +		.int_st			= BIT(0),
> +		.ctl0			= 0x00540003,
> +		.type			= SVSB_LOW,
> +	},
> +	{
> +		.sw_id			= SVSB_GPU,
> +		.set_freqs_pct		= svs_set_freqs_pct_v3,
> +		.get_vops		= svs_get_vops_v3,
> +		.hw_id			= 1,
> +		.tzone_name		= "gpu1",
> +		.buck_name		= "mali",
> +		.volt_flags		= SVSB_INIT02_RM_DVTFIXED |
> +					  SVSB_MON_VOLT_IGNORE,
> +		.mode_support		= SVSB_MODE_INIT02 |
> SVSB_MODE_MON,
> +		.opp_count		= 16,
> +		.freq_base		= 902000000,
> +		.turn_freq_base		= 688000000,
> +		.vboot			= 0x38,
> +		.volt_step		= 6250,
> +		.volt_base		= 400000,
> +		.volt_offset		= 0,
> +		.vmax			= 0x60,
> +		.vmin			= 0x1a,
> +		.dthi			= 0x1,
> +		.dtlo			= 0xfe,
> +		.det_window		= 0xa28,
> +		.det_max		= 0xffff,
> +		.age_config		= 0x555555,
> +		.agem			= 0,
> +		.dc_config		= 0x1,
> +		.dvt_fixed		= 0x6,
> +		.vco			= 0x18,
> +		.chk_shift		= 0x87,
> +		.temp_upper_bound	= 0x64,
> +		.temp_lower_bound	= 0xb2,
> +		.tzone_high_temp	= 85000,
> +		.tzone_high_temp_offset	= 0,
> +		.tzone_low_temp		= 25000,
> +		.tzone_low_temp_offset	= 7,
> +		.core_sel		= 0x0fff0101,
> +		.int_st			= BIT(1),
> +		.ctl0			= 0x00540003,
> +		.type			= SVSB_HIGH,
> +	},
> +};
> +
>  static struct svs_bank svs_mt8183_banks[] = {
>  	{
>  		.sw_id			= SVSB_CPU_LITTLE,
> @@ -1888,6 +2318,46 @@ static struct svs_bank svs_mt8183_banks[] = {
>  	},
>  };
>  
> +static int svs_get_svs_mt8192_platform_data(struct svs_platform
> *svsp)
> +{
> +	struct device *dev;
> +	struct svs_bank *svsb;
> +	u32 idx;
> +
> +	svsp->name = "mt8192-svs";
> +	svsp->banks = svs_mt8192_banks;
> +	svsp->efuse_parsing = svs_mt8192_efuse_parsing;
> +	svsp->regs = svs_regs_v2;
> +	svsp->irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
> +	svsp->bank_num = ARRAY_SIZE(svs_mt8192_banks);
> +	svsp->efuse_check = 9;
> +
> +	svsp->rst = devm_reset_control_get_optional(svsp->dev,
> "svs_rst");
> +	if (IS_ERR(svsp->rst)) {
> +		dev_err_probe(svsp->dev, PTR_ERR(svsp->rst),
> +			      "cannot get svs reset control\n");
> +		return PTR_ERR(svsp->rst);
> +	}
> +
> +	dev = svs_add_device_link(svsp, "lvts");
> +	if (IS_ERR(dev))
> +		return PTR_ERR(dev);
> +
> +	for (idx = 0; idx < svsp->bank_num; idx++) {
> +		svsb = &svsp->banks[idx];
> +
> +		if (svsb->type == SVSB_HIGH)
> +			svsb->opp_dev = svs_add_device_link(svsp,
> "mali");
> +		else if (svsb->type == SVSB_LOW)
> +			svsb->opp_dev = svs_get_subsys_device(svsp,
> "mali");
> +
> +		if (IS_ERR(svsb->opp_dev))
> +			return PTR_ERR(svsb->opp_dev);
> +	}
> +
> +	return 0;
> +}
> +
>  static int svs_get_svs_mt8183_platform_data(struct svs_platform
> *svsp)
>  {
>  	struct device *dev;
> @@ -1941,6 +2411,9 @@ static const struct of_device_id
> mtk_svs_of_match[] = {
>  	{
>  		.compatible = "mediatek,mt8183-svs",
>  		.data = &svs_get_svs_mt8183_platform_data,
> +	}, {
> +		.compatible = "mediatek,mt8192-svs",
> +		.data = &svs_get_svs_mt8192_platform_data,
>  	}, {
>  		/* Sentinel */
>  	},
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Re: [PATCH v16 7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver

[AngeloGioacchino Del Regno]

> Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> Reviewed-by: YT Lee <yt.lee@mediatek.com>
> ---
>   drivers/soc/mediatek/mtk-svs.c | 485 ++++++++++++++++++++++++++++++++-
>   1 file changed, 479 insertions(+), 6 deletions(-)
> 

Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

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Re: [PATCH v16 0/7] soc: mediatek: SVS: introduce MTK SVS

[Matthias Brugger]

On 28/04/2021 08:54, Roger Lu wrote:
> 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.
> 3. SVS dts refers to reset controller [4] to help reset SVS HW.
> 
> #mt8183 SVS related patches
> [1] https://patchwork.kernel.org/patch/11193513/

Already mainline, please either refer to the commit, to make it clear it's 
maineline or drop it.

> [2] https://patchwork.kernel.org/project/linux-mediatek/patch/20201013102358.22588-2-michael.kao@mediatek.com/

Same here.

> [3] https://patchwork.kernel.org/project/linux-mediatek/patch/20200306041345.259332-3-drinkcat@chromium.org/

Same here,

> 
> #mt8192 SVS related patches
> [1] https://patchwork.kernel.org/patch/11193513/

Same here, it's actually the same link as [1].

> [2] https://patchwork.kernel.org/project/linux-mediatek/patch/20201223074944.2061-1-michael.kao@mediatek.com/
> [3] https://lore.kernel.org/patchwork/patch/1360551/
> [4] https://patchwork.kernel.org/project/linux-mediatek/patch/20200817030324.5690-5-crystal.guo@mediatek.com/

There are many dependencies for that. Some patches need resubmit, others seem to 
be stale. I'd advise to concentrate on mt8183 for now and add support for mt8192 
once dependencies have settled.

Regards,
Matthias

> 
> changes since v15:
> - Put (*set_freqs_pct) and (*get_vops) in struct svs_bank because they are part of svs bank's operation
> - Add define "SVSB_INIT02_RM_DVTFIXED" and "SVSB_MON_VOLT_IGNORE" to make control clearly.
> - Remove unnecessary parenthesis
> 
> Roger Lu (7):
>    [v16,1/7] dt-bindings: soc: mediatek: add mtk svs dt-bindings
>    [v16,2/7] arm64: dts: mt8183: add svs device information
>    [v16,3/7] soc: mediatek: SVS: introduce MTK SVS engine
>    [v16,4/7] soc: mediatek: SVS: add debug commands
>    [v16,5/7] dt-bindings: soc: mediatek: add mt8192 svs dt-bindings
>    [v16,6/7] arm64: dts: mt8192: add svs device information
>    [v16,7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver
> 
>   .../bindings/soc/mediatek/mtk-svs.yaml        |   92 +
>   arch/arm64/boot/dts/mediatek/mt8183.dtsi      |   18 +
>   arch/arm64/boot/dts/mediatek/mt8192.dtsi      |   34 +
>   drivers/soc/mediatek/Kconfig                  |   10 +
>   drivers/soc/mediatek/Makefile                 |    1 +
>   drivers/soc/mediatek/mtk-svs.c                | 2524 +++++++++++++++++
>   6 files changed, 2679 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml
>   create mode 100644 drivers/soc/mediatek/mtk-svs.c
> 
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek
> 

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Re: [PATCH v16 0/7] soc: mediatek: SVS: introduce MTK SVS

[Roger Lu]

Hi Matthias,

On Thu, 2021-12-30 at 14:18 +0100, Matthias Brugger wrote:
> 
> On 28/04/2021 08:54, Roger Lu wrote:
> > 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.
> > 3. SVS dts refers to reset controller [4] to help reset SVS HW.
> > 
> > #mt8183 SVS related patches
> > [1] 
> > https://urldefense.com/v3/__https://patchwork.kernel.org/patch/11193513/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MIscKXW-$
> >  
> 
> Already mainline, please either refer to the commit, to make it clear it's 
> maineline or drop it.
> 
> > [2] 
> > https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek/patch/20201013102358.22588-2-michael.kao@mediatek.com/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3ML35Ale5$
> >  
> 
> Same here.
> 
> > [3] 
> > https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek/patch/20200306041345.259332-3-drinkcat@chromium.org/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MMUMr7Oh$
> >  
> 
> Same here,

Thanks for the review. I'll refer to mainline or the latest reviewing patch. 

> 
> > 
> > #mt8192 SVS related patches
> > [1] 
> > https://urldefense.com/v3/__https://patchwork.kernel.org/patch/11193513/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MIscKXW-$
> >  
> 
> Same here, it's actually the same link as [1].
> 
> > [2] 
> > https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek/patch/20201223074944.2061-1-michael.kao@mediatek.com/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MEUxFEDM$
> >  
> > [3] 
> > https://urldefense.com/v3/__https://lore.kernel.org/patchwork/patch/1360551/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MNObUeLt$
> >  
> > [4] 
> > https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek/patch/20200817030324.5690-5-crystal.guo@mediatek.com/__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MMx-JKoe$
> >  
> 
> There are many dependencies for that. Some patches need resubmit, others seem
> to 
> be stale. I'd advise to concentrate on mt8183 for now and add support for
> mt8192 
> once dependencies have settled.

Sure, let's concentrate on mt8183 patches first. Thanks for sharing the advice.

> 
> Regards,
> Matthias
> 
> > 
> > changes since v15:
> > - Put (*set_freqs_pct) and (*get_vops) in struct svs_bank because they are
> > part of svs bank's operation
> > - Add define "SVSB_INIT02_RM_DVTFIXED" and "SVSB_MON_VOLT_IGNORE" to make
> > control clearly.
> > - Remove unnecessary parenthesis
> > 
> > Roger Lu (7):
> >    [v16,1/7] dt-bindings: soc: mediatek: add mtk svs dt-bindings
> >    [v16,2/7] arm64: dts: mt8183: add svs device information
> >    [v16,3/7] soc: mediatek: SVS: introduce MTK SVS engine
> >    [v16,4/7] soc: mediatek: SVS: add debug commands
> >    [v16,5/7] dt-bindings: soc: mediatek: add mt8192 svs dt-bindings
> >    [v16,6/7] arm64: dts: mt8192: add svs device information
> >    [v16,7/7] soc: mediatek: SVS: add mt8192 SVS GPU driver
> > 
> >   .../bindings/soc/mediatek/mtk-svs.yaml        |   92 +
> >   arch/arm64/boot/dts/mediatek/mt8183.dtsi      |   18 +
> >   arch/arm64/boot/dts/mediatek/mt8192.dtsi      |   34 +
> >   drivers/soc/mediatek/Kconfig                  |   10 +
> >   drivers/soc/mediatek/Makefile                 |    1 +
> >   drivers/soc/mediatek/mtk-svs.c                | 2524 +++++++++++++++++
> >   6 files changed, 2679 insertions(+)
> >   create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mtk-
> > svs.yaml
> >   create mode 100644 drivers/soc/mediatek/mtk-svs.c
> > 
> > _______________________________________________
> > Linux-mediatek mailing list
> > Linux-mediatek@lists.infradead.org
> > 
https://urldefense.com/v3/__http://lists.infradead.org/mailman/listinfo/linux-mediatek__;!!CTRNKA9wMg0ARbw!yy2e7JqE__BQAZF3jwBuR3Fbzbv8LPxwwA3l6SVu7SFAG94dCHyVq9A3MIj4Pohu$
> >  
> > 


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