[PATCH v5 0/3] riscv: sophgo: add thermal sensor support for cv180x/sg200x SoCs

[PATCH v5 0/3] riscv: sophgo: add thermal sensor support for cv180x/sg200x SoCs

[Haylen Chu]

This series implements driver for Sophgo cv180x/sg200x on-chip thermal
sensor and adds thermal zones for CV1800B SoCs.

Changed from v4:
1. support temperature threshold violation interrupts
2. completely switch codename to cv1800
3. style improvements
4. update e-mail address
Link: https://lore.kernel.org/all/SEYPR01MB422158B2766DA03728AD90CBD7A22@SEYPR01MB4221.apcprd01.prod.exchangelabs.com/

Changed from v3:
1. style improvments
2. drop unnecessary dt parameters for simplicity
Link: https://lore.kernel.org/all/SEYPR01MB42213F3A032C60C6AF5EB677D7DC2@SEYPR01MB4221.apcprd01.prod.exchangelabs.com/

Changed from v2:
1. style and code improvements
2. use human-readable value for sensor parameters
Link: https://lore.kernel.org/all/SG2PR01MB4218013241B3EED779D3BAE8D7F82@SG2PR01MB4218.apcprd01.prod.exchangelabs.com/

Changed from v1:
1. style and code improvements
2. make sample parameters configurable
3. generalize document temperature calculating formula
Link: https://lore.kernel.org/all/SEYPR01MB422119B40F4CF05B823F93DCD7F32@SEYPR01MB4221.apcprd01.prod.exchangelabs.com/

Haylen Chu (3):
  dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal
  thermal: cv1800: Add cv1800 thermal driver support
  riscv: dts: sophgo: cv18xx: Add sensor device and thermal zone

 .../thermal/sophgo,cv1800-thermal.yaml        |  57 ++++
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi       |  28 ++
 arch/riscv/boot/dts/sophgo/cv18xx.dtsi        |   8 +
 drivers/thermal/Kconfig                       |   6 +
 drivers/thermal/Makefile                      |   1 +
 drivers/thermal/cv1800_thermal.c              | 296 ++++++++++++++++++
 6 files changed, 396 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
 create mode 100644 drivers/thermal/cv1800_thermal.c

-- 
2.46.2

[PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Haylen Chu]

Add devicetree binding documentation for thermal sensors integrated in
Sophgo CV1800 SoCs.

Signed-off-by: Haylen Chu <heylenay@4d2.org>
---
 .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml

diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
new file mode 100644
index 000000000000..14abeb7a272a
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800 on-SoC Thermal Sensor
+
+maintainers:
+  - Haylen Chu <heylenay@4d2.org>
+
+description: Sophgo CV1800 on-SoC thermal sensor
+
+$ref: thermal-sensor.yaml#
+
+properties:
+  compatible:
+    enum:
+      - sophgo,cv1800-thermal
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  sample-rate-hz:
+    minimum: 1
+    maximum: 1908
+    default: 1
+
+  '#thermal-sensor-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sophgo,cv1800.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    thermal-sensor@30e0000 {
+        compatible = "sophgo,cv1800-thermal";
+        reg = <0x30e0000 0x100>;
+        clocks = <&clk CLK_TEMPSEN>;
+        interrupts = <16 IRQ_TYPE_LEVEL_HIGH>;
+        #thermal-sensor-cells = <0>;
+    };
+...
-- 
2.46.2

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Krzysztof Kozlowski]

On Mon, Oct 14, 2024 at 07:38:11AM +0000, Haylen Chu wrote:
> Add devicetree binding documentation for thermal sensors integrated in
> Sophgo CV1800 SoCs.
> 
> Signed-off-by: Haylen Chu <heylenay@4d2.org>
> ---
>  .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> 
> diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> new file mode 100644
> index 000000000000..14abeb7a272a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo CV1800 on-SoC Thermal Sensor
> +
> +maintainers:
> +  - Haylen Chu <heylenay@4d2.org>
> +
> +description: Sophgo CV1800 on-SoC thermal sensor
> +
> +$ref: thermal-sensor.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sophgo,cv1800-thermal

Not much improved, judging by other patches there is no "CV1800" SoC,
but that's a family name.  Otherwise please point us to bindings or DTS
using this SoC.

Best regards,
Krzysztof

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Haylen Chu]

On Tue, Oct 15, 2024 at 07:52:33AM +0200, Krzysztof Kozlowski wrote:
> On Mon, Oct 14, 2024 at 07:38:11AM +0000, Haylen Chu wrote:
> > Add devicetree binding documentation for thermal sensors integrated in
> > Sophgo CV1800 SoCs.
> > 
> > Signed-off-by: Haylen Chu <heylenay@4d2.org>
> > ---
> >  .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
> >  1 file changed, 57 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> > new file mode 100644
> > index 000000000000..14abeb7a272a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> > @@ -0,0 +1,57 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Sophgo CV1800 on-SoC Thermal Sensor
> > +
> > +maintainers:
> > +  - Haylen Chu <heylenay@4d2.org>
> > +
> > +description: Sophgo CV1800 on-SoC thermal sensor
> > +
> > +$ref: thermal-sensor.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - sophgo,cv1800-thermal
> 
> Not much improved, judging by other patches there is no "CV1800" SoC,
> but that's a family name.  Otherwise please point us to bindings or DTS
> using this SoC.

"cv1800" is referenced in the clock binding[1] and usb binding[2]. I
don't think there are other CV1800 SoC variants. Usage of "CV1800"
should be specific and unambiguous.

Best regards,
Haylen Chu

[1]: https://elixir.bootlin.com/linux/v6.11.3/source/Documentation/devicetree/bindings/clock/sophgo,cv1800-clk.yaml
[2]: https://elixir.bootlin.com/linux/v6.11.3/source/Documentation/devicetree/bindings/usb/dwc2.yaml#L62

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Krzysztof Kozlowski]

On 15/10/2024 15:07, Haylen Chu wrote:
> On Tue, Oct 15, 2024 at 07:52:33AM +0200, Krzysztof Kozlowski wrote:
>> On Mon, Oct 14, 2024 at 07:38:11AM +0000, Haylen Chu wrote:
>>> Add devicetree binding documentation for thermal sensors integrated in
>>> Sophgo CV1800 SoCs.
>>>
>>> Signed-off-by: Haylen Chu <heylenay@4d2.org>
>>> ---
>>>  .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
>>>  1 file changed, 57 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
>>> new file mode 100644
>>> index 000000000000..14abeb7a272a
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
>>> @@ -0,0 +1,57 @@
>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Sophgo CV1800 on-SoC Thermal Sensor
>>> +
>>> +maintainers:
>>> +  - Haylen Chu <heylenay@4d2.org>
>>> +
>>> +description: Sophgo CV1800 on-SoC thermal sensor
>>> +
>>> +$ref: thermal-sensor.yaml#
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - sophgo,cv1800-thermal
>>
>> Not much improved, judging by other patches there is no "CV1800" SoC,
>> but that's a family name.  Otherwise please point us to bindings or DTS
>> using this SoC.
> 
> "cv1800" is referenced in the clock binding[1] and usb binding[2]. I
> don't think there are other CV1800 SoC variants. Usage of "CV1800"

There are. git grep cv1800

> should be specific and unambiguous.

And other places have different name.

Best regards,
Krzysztof

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Haylen Chu]

On Tue, Oct 15, 2024 at 03:34:39PM +0200, Krzysztof Kozlowski wrote:
> On 15/10/2024 15:07, Haylen Chu wrote:
> > On Tue, Oct 15, 2024 at 07:52:33AM +0200, Krzysztof Kozlowski wrote:
> >> On Mon, Oct 14, 2024 at 07:38:11AM +0000, Haylen Chu wrote:
> >>> Add devicetree binding documentation for thermal sensors integrated in
> >>> Sophgo CV1800 SoCs.
> >>>
> >>> Signed-off-by: Haylen Chu <heylenay@4d2.org>
> >>> ---
> >>>  .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
> >>>  1 file changed, 57 insertions(+)
> >>>  create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> >>> new file mode 100644
> >>> index 000000000000..14abeb7a272a
> >>> --- /dev/null
> >>> +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> >>> @@ -0,0 +1,57 @@
> >>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> >>> +%YAML 1.2
> >>> +---
> >>> +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
> >>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >>> +
> >>> +title: Sophgo CV1800 on-SoC Thermal Sensor
> >>> +
> >>> +maintainers:
> >>> +  - Haylen Chu <heylenay@4d2.org>
> >>> +
> >>> +description: Sophgo CV1800 on-SoC thermal sensor
> >>> +
> >>> +$ref: thermal-sensor.yaml#
> >>> +
> >>> +properties:
> >>> +  compatible:
> >>> +    enum:
> >>> +      - sophgo,cv1800-thermal
> >>
> >> Not much improved, judging by other patches there is no "CV1800" SoC,
> >> but that's a family name.  Otherwise please point us to bindings or DTS
> >> using this SoC.
> > 
> > "cv1800" is referenced in the clock binding[1] and usb binding[2]. I
> > don't think there are other CV1800 SoC variants. Usage of "CV1800"
> 
> There are. git grep cv1800
> 
> > should be specific and unambiguous.
> 
> And other places have different name.

Okay, will use cv1800b in the next revision instead. Thanks.

Best regards,
Haylen Chu

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Krzysztof Kozlowski]

On 16/10/2024 13:53, Haylen Chu wrote:
>>>>> +
>>>>> +properties:
>>>>> +  compatible:
>>>>> +    enum:
>>>>> +      - sophgo,cv1800-thermal
>>>>
>>>> Not much improved, judging by other patches there is no "CV1800" SoC,
>>>> but that's a family name.  Otherwise please point us to bindings or DTS
>>>> using this SoC.
>>>
>>> "cv1800" is referenced in the clock binding[1] and usb binding[2]. I
>>> don't think there are other CV1800 SoC variants. Usage of "CV1800"
>>
>> There are. git grep cv1800
>>
>>> should be specific and unambiguous.
>>
>> And other places have different name.
> 
> Okay, will use cv1800b in the next revision instead. Thanks.

Just to clarify: I assume the name of the SoC is cv1800b.

Best regards,
Krzysztof

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Krzysztof Kozlowski]

On Mon, Oct 14, 2024 at 07:38:11AM +0000, Haylen Chu wrote:
> Add devicetree binding documentation for thermal sensors integrated in
> Sophgo CV1800 SoCs.
> 
> Signed-off-by: Haylen Chu <heylenay@4d2.org>
> ---
>  .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> 
> diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> new file mode 100644
> index 000000000000..14abeb7a272a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo CV1800 on-SoC Thermal Sensor
> +
> +maintainers:
> +  - Haylen Chu <heylenay@4d2.org>
> +
> +description: Sophgo CV1800 on-SoC thermal sensor
> +
> +$ref: thermal-sensor.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sophgo,cv1800-thermal
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  sample-rate-hz:
> +    minimum: 1
> +    maximum: 1908
> +    default: 1

1. Why this is a property of a board?
2. I do not see this property defined in any common schema and I am not
sure if it even should. Sample rate appears from time to time, but not
in context of thermal sensors, so this should have vendor prefix.

Best regards,
Krzysztof

Re: [PATCH v5 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal

[Haylen Chu]

On Tue, Oct 15, 2024 at 07:55:10AM +0200, Krzysztof Kozlowski wrote:
> On Mon, Oct 14, 2024 at 07:38:11AM +0000, Haylen Chu wrote:
> > Add devicetree binding documentation for thermal sensors integrated in
> > Sophgo CV1800 SoCs.
> > 
> > Signed-off-by: Haylen Chu <heylenay@4d2.org>
> > ---
> >  .../thermal/sophgo,cv1800-thermal.yaml        | 57 +++++++++++++++++++
> >  1 file changed, 57 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> > new file mode 100644
> > index 000000000000..14abeb7a272a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml
> > @@ -0,0 +1,57 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Sophgo CV1800 on-SoC Thermal Sensor
> > +
> > +maintainers:
> > +  - Haylen Chu <heylenay@4d2.org>
> > +
> > +description: Sophgo CV1800 on-SoC thermal sensor
> > +
> > +$ref: thermal-sensor.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - sophgo,cv1800-thermal
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  sample-rate-hz:
> > +    minimum: 1
> > +    maximum: 1908
> > +    default: 1
> 
> 1. Why this is a property of a board?
> 2. I do not see this property defined in any common schema and I am not
> sure if it even should. Sample rate appears from time to time, but not
> in context of thermal sensors, so this should have vendor prefix.

Thanks, I decide to remove this property.

Best regards,
Haylen Chu

[PATCH v5 2/3] thermal: cv1800: Add cv1800 thermal driver support

[Haylen Chu]

Add support for cv1800 SoC integrated thermal sensors. Temperature is
calculated with a curve-fitted formula. Threshold registers are set as
specified by trip points and the thermal zone will be updated on
threshold violation interrupts.

Signed-off-by: Haylen Chu <heylenay@4d2.org>
---
 drivers/thermal/Kconfig          |   6 +
 drivers/thermal/Makefile         |   1 +
 drivers/thermal/cv1800_thermal.c | 296 +++++++++++++++++++++++++++++++
 3 files changed, 303 insertions(+)
 create mode 100644 drivers/thermal/cv1800_thermal.c

diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 61e7ae524b1f..901524ba8b38 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -499,4 +499,10 @@ config LOONGSON2_THERMAL
 	  is higher than the high temperature threshold or lower than the low
 	  temperature threshold, the interrupt will occur.
 
+config CV1800_THERMAL
+	tristate "Temperature sensor driver for Sophgo CV1800"
+	help
+	  If you say yes here you get support for thermal sensor integrated in
+	  Sophgo CV1800 SoC.
+
 endif
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index 41c4d56beb40..b1890b570f9b 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -63,4 +63,5 @@ obj-$(CONFIG_AMLOGIC_THERMAL)     += amlogic_thermal.o
 obj-$(CONFIG_SPRD_THERMAL)	+= sprd_thermal.o
 obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL)	+= khadas_mcu_fan.o
 obj-$(CONFIG_LOONGSON2_THERMAL)	+= loongson2_thermal.o
+obj-$(CONFIG_CV1800_THERMAL)	+= cv1800_thermal.o
 obj-$(CONFIG_THERMAL_CORE_TESTING)	+= testing/
diff --git a/drivers/thermal/cv1800_thermal.c b/drivers/thermal/cv1800_thermal.c
new file mode 100644
index 000000000000..588fc2da06e1
--- /dev/null
+++ b/drivers/thermal/cv1800_thermal.c
@@ -0,0 +1,296 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Sophgo Inc.
+ * Copyright (C) 2024 Haylen Chu <heylenay@4d2.org>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/thermal.h>
+#include <linux/units.h>
+
+#define TEMPSEN_VERSION					0x0
+#define TEMPSEN_CTRL					0x4
+#define  TEMPSEN_CTRL_EN				BIT(0)
+#define  TEMPSEN_CTRL_SEL_MASK				GENMASK(7, 4)
+#define  TEMPSEN_CTRL_SEL_OFFSET			4
+#define TEMPSEN_STATUS					0x8
+#define TEMPSEN_SET					0xc
+#define  TEMPSEN_SET_CHOPSEL_MASK			GENMASK(5, 4)
+#define  TEMPSEN_SET_CHOPSEL_OFFSET			4
+#define  TEMPSEN_SET_CHOPSEL_128T			0
+#define  TEMPSEN_SET_CHOPSEL_256T			1
+#define  TEMPSEN_SET_CHOPSEL_512T			2
+#define  TEMPSEN_SET_CHOPSEL_1024T			3
+#define  TEMPSEN_SET_ACCSEL_MASK			GENMASK(7, 6)
+#define  TEMPSEN_SET_ACCSEL_OFFSET			6
+#define  TEMPSEN_SET_ACCSEL_512T			0
+#define  TEMPSEN_SET_ACCSEL_1024T			1
+#define  TEMPSEN_SET_ACCSEL_2048T			2
+#define  TEMPSEN_SET_ACCSEL_4096T			3
+#define  TEMPSEN_SET_CYC_CLKDIV_MASK			GENMASK(15, 8)
+#define  TEMPSEN_SET_CYC_CLKDIV_OFFSET			8
+#define TEMPSEN_INTR_EN					0x10
+#define TEMPSEN_INTR_CLR				0x14
+#define TEMPSEN_INTR_STA				0x18
+#define TEMPSEN_INTR_RAW				0x1c
+#define  TEMPSEN_INTR_THRESHOLD_HIGH(n)			BIT(4 + (n))
+#define  TEMPSEN_INTR_THRESHOLD_LOW(n)			BIT(8 + (n))
+#define TEMPSEN_RESULT(n)				(0x20 + (n) * 4)
+#define  TEMPSEN_RESULT_RESULT_MASK			GENMASK(12, 0)
+#define  TEMPSEN_RESULT_MAX_RESULT_MASK			GENMASK(28, 16)
+#define  TEMPSEN_RESULT_CLR_MAX_RESULT			BIT(31)
+#define TEMPSEN_THRESHOLD(n)				(0x40 + (n) * 4)
+#define  TEMPSEN_THRESHOLD_HIGH_OFFSET			0
+#define  TEMPSEN_THRESHOLD_LOW_OFFSET			16
+#define TEMPSEN_AUTO_PERIOD				0x64
+#define  TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_MASK		GENMASK(23, 0)
+#define  TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_OFFSET		0
+
+struct cv1800_thermal_zone {
+	struct device *dev;
+	void __iomem *base;
+	struct clk *clk_tempsen;
+	u32 sample_cycle;
+};
+
+static void cv1800_thermal_init(struct cv1800_thermal_zone *ctz)
+{
+	void __iomem *base = ctz->base;
+	u32 regval;
+
+	writel(readl(base + TEMPSEN_INTR_RAW), base + TEMPSEN_INTR_CLR);
+	writel(TEMPSEN_RESULT_CLR_MAX_RESULT, base + TEMPSEN_RESULT(0));
+
+	regval = readl(base + TEMPSEN_SET);
+	regval &= ~TEMPSEN_SET_CHOPSEL_MASK;
+	regval &= ~TEMPSEN_SET_ACCSEL_MASK;
+	regval &= ~TEMPSEN_SET_CYC_CLKDIV_MASK;
+	regval |= TEMPSEN_SET_CHOPSEL_1024T << TEMPSEN_SET_CHOPSEL_OFFSET;
+	regval |= TEMPSEN_SET_ACCSEL_2048T << TEMPSEN_SET_ACCSEL_OFFSET;
+	regval |= 0x31 << TEMPSEN_SET_CYC_CLKDIV_OFFSET;
+	writel(regval, base + TEMPSEN_SET);
+
+	regval = readl(base + TEMPSEN_AUTO_PERIOD);
+	regval &= ~TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_MASK;
+	regval |= ctz->sample_cycle << TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_OFFSET;
+	writel(regval, base + TEMPSEN_AUTO_PERIOD);
+
+	regval = readl(base + TEMPSEN_CTRL);
+	regval &= ~TEMPSEN_CTRL_SEL_MASK;
+	regval |= 1 << TEMPSEN_CTRL_SEL_OFFSET;
+	regval |= TEMPSEN_CTRL_EN;
+	writel(regval, base + TEMPSEN_CTRL);
+}
+
+static void cv1800_thermal_deinit(struct cv1800_thermal_zone *ctz)
+{
+	void __iomem *base = ctz->base;
+	u32 regval;
+
+	regval = readl(base + TEMPSEN_CTRL);
+	regval &= ~(TEMPSEN_CTRL_SEL_MASK | TEMPSEN_CTRL_EN);
+	writel(regval, base + TEMPSEN_CTRL);
+
+	writel(0, base + TEMPSEN_INTR_EN);
+}
+
+/*
+ *	Raw register value to temperature (mC) formula:
+ *
+ *		       read_val * 1000 * 716
+ *	Temperature = ----------------------- - 273000
+ *				divider
+ *
+ *	where divider should be ticks number of accumulation period,
+ *	e.g. 2048 for TEMPSEN_CTRL_ACCSEL_2048T
+ */
+static int cv1800_calc_temp(u32 result)
+{
+	return (result * 1000) * 716 / 2048 - 273000;
+}
+
+static u32 cv1800_calc_raw(int temp)
+{
+	return (temp + 273000) * 2048 / (1000 * 716);
+}
+
+static int cv1800_set_threshold(struct cv1800_thermal_zone *ctz,
+				int low, int high)
+{
+	writel((cv1800_calc_raw(low) << TEMPSEN_THRESHOLD_LOW_OFFSET) |
+	       (cv1800_calc_raw(high) << TEMPSEN_THRESHOLD_HIGH_OFFSET),
+	       ctz->base + TEMPSEN_THRESHOLD(0));
+	writel(TEMPSEN_INTR_THRESHOLD_LOW(0) | TEMPSEN_INTR_THRESHOLD_HIGH(0),
+	       ctz->base + TEMPSEN_INTR_EN);
+
+	return 0;
+}
+
+static irqreturn_t cv1800_irq_thread(int irq, void *dev)
+{
+	struct thermal_zone_device *tdev = dev;
+	struct cv1800_thermal_zone *ctz = thermal_zone_device_priv(tdev);
+
+	writel(readl(ctz->base + TEMPSEN_INTR_RAW),
+	       ctz->base + TEMPSEN_INTR_CLR);
+
+	thermal_zone_device_update(tdev, THERMAL_EVENT_UNSPECIFIED);
+
+	return IRQ_HANDLED;
+}
+
+static int cv1800_get_temp(struct thermal_zone_device *tdev, int *temperature)
+{
+	struct cv1800_thermal_zone *ctz = thermal_zone_device_priv(tdev);
+	void __iomem *base = ctz->base;
+	u32 result;
+
+	result = readl(base + TEMPSEN_RESULT(0)) & TEMPSEN_RESULT_RESULT_MASK;
+	*temperature = cv1800_calc_temp(result);
+
+	return 0;
+}
+
+static int cv1800_set_trips(struct thermal_zone_device *tdev, int low, int high)
+{
+	struct cv1800_thermal_zone *ctz = thermal_zone_device_priv(tdev);
+
+	return cv1800_set_threshold(ctz,
+				    clamp(low, -273 * 1000, 200 * 1000),
+				    clamp(high, -273 * 1000, 200 * 1000));
+}
+
+static const struct thermal_zone_device_ops cv1800_thermal_ops = {
+	.get_temp	= cv1800_get_temp,
+	.set_trips	= cv1800_set_trips,
+};
+
+static const struct of_device_id cv1800_thermal_of_match[] = {
+	{ .compatible = "sophgo,cv1800-thermal" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, cv1800_thermal_of_match);
+
+static int
+cv1800_parse_dt(struct cv1800_thermal_zone *ctz)
+{
+	struct device_node *np = ctz->dev->of_node;
+	u32 tmp;
+
+	if (of_property_read_u32(np, "sample-rate-hz", &tmp)) {
+		ctz->sample_cycle = 1000000;
+	} else {
+		/* sample cycle should be at least 524us */
+		if (tmp > 1000000 / 524) {
+			dev_err(ctz->dev, "invalid sample rate %d\n", tmp);
+			return -EINVAL;
+		}
+
+		ctz->sample_cycle = 1000000 / tmp;
+	}
+
+	return 0;
+}
+
+static int cv1800_thermal_probe(struct platform_device *pdev)
+{
+	struct thermal_zone_device *tdev;
+	struct cv1800_thermal_zone *ctz;
+	struct resource *res;
+	int ret, irq;
+
+	ctz = devm_kzalloc(&pdev->dev, sizeof(*ctz), GFP_KERNEL);
+	if (!ctz)
+		return -ENOMEM;
+
+	ctz->dev = &pdev->dev;
+
+	ret = cv1800_parse_dt(ctz);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to parse dt\n");
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctz->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ctz->base))
+		return dev_err_probe(&pdev->dev, PTR_ERR(ctz->base),
+				     "failed to map tempsen registers\n");
+
+	ctz->clk_tempsen = devm_clk_get_enabled(&pdev->dev, NULL);
+	if (IS_ERR(ctz->clk_tempsen))
+		return dev_err_probe(&pdev->dev, PTR_ERR(ctz->clk_tempsen),
+				     "failed to get clk_tempsen\n");
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	cv1800_thermal_init(ctz);
+
+	tdev = devm_thermal_of_zone_register(&pdev->dev, 0, ctz,
+					     &cv1800_thermal_ops);
+	if (IS_ERR(tdev))
+		return dev_err_probe(&pdev->dev, PTR_ERR(tdev),
+				     "failed to register thermal zone\n");
+
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					cv1800_irq_thread, IRQF_ONESHOT,
+					"cv1800_thermal", tdev);
+	if (ret < 0)
+		return dev_err_probe(&pdev->dev, ret, "failed to request irq\n");
+
+	platform_set_drvdata(pdev, ctz);
+
+	return 0;
+}
+
+static void cv1800_thermal_remove(struct platform_device *pdev)
+{
+	struct cv1800_thermal_zone *ctz = platform_get_drvdata(pdev);
+
+	cv1800_thermal_deinit(ctz);
+}
+
+static int __maybe_unused cv1800_thermal_suspend(struct device *dev)
+{
+	struct cv1800_thermal_zone *ctz = dev_get_drvdata(dev);
+
+	cv1800_thermal_deinit(ctz);
+	clk_disable_unprepare(ctz->clk_tempsen);
+
+	return 0;
+}
+
+static int __maybe_unused cv1800_thermal_resume(struct device *dev)
+{
+	struct cv1800_thermal_zone *ctz = dev_get_drvdata(dev);
+
+	clk_prepare_enable(ctz->clk_tempsen);
+	cv1800_thermal_init(ctz);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(cv1800_thermal_pm_ops,
+			 cv1800_thermal_suspend, cv1800_thermal_resume);
+
+static struct platform_driver cv1800_thermal_driver = {
+	.probe = cv1800_thermal_probe,
+	.remove = cv1800_thermal_remove,
+	.driver = {
+		.name = "cv1800-thermal",
+		.pm = &cv1800_thermal_pm_ops,
+		.of_match_table = cv1800_thermal_of_match,
+	},
+};
+
+module_platform_driver(cv1800_thermal_driver);
+
+MODULE_DESCRIPTION("Sophgo CV1800 thermal driver");
+MODULE_AUTHOR("Haylen Chu <heylenay@4d2.org>");
+MODULE_LICENSE("GPL");
-- 
2.46.2

[PATCH v5 3/3] riscv: dts: sophgo: cv18xx: Add sensor device and thermal zone

[Haylen Chu]

Add common sensor device for Sophgo CV18xx SoCs and thermal zone for
CV1800b SoC.

Signed-off-by: Haylen Chu <heylenay@4d2.org>
---
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 28 +++++++++++++++++++++++++
 arch/riscv/boot/dts/sophgo/cv18xx.dtsi  |  8 +++++++
 2 files changed, 36 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
index ec9530972ae2..af53c9ec3197 100644
--- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
@@ -12,6 +12,34 @@ memory@80000000 {
 		device_type = "memory";
 		reg = <0x80000000 0x4000000>;
 	};
+
+	thermal-zones {
+		soc-thermal {
+			polling-delay-passive   = <1000>;
+			polling-delay           = <1000>;
+			thermal-sensors         = <&soc_temp>;
+
+			trips {
+				soc_passive: soc-passive {
+					temperature     = <75000>;
+					hysteresis      = <5000>;
+					type            = "passive";
+				};
+
+				soc_hot: soc-hot {
+					temperature     = <85000>;
+					hysteresis      = <5000>;
+					type            = "hot";
+				};
+
+				soc_critical: soc-critical {
+					temperature     = <100000>;
+					hysteresis      = <0>;
+					type            = "critical";
+				};
+			};
+		};
+	};
 };
 
 &plic {
diff --git a/arch/riscv/boot/dts/sophgo/cv18xx.dtsi b/arch/riscv/boot/dts/sophgo/cv18xx.dtsi
index b724fb6d9689..0465561f7043 100644
--- a/arch/riscv/boot/dts/sophgo/cv18xx.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv18xx.dtsi
@@ -133,6 +133,14 @@ portd: gpio-controller@0 {
 			};
 		};
 
+		soc_temp: thermal-sensor@30e0000 {
+			compatible = "sophgo,cv1800-thermal";
+			reg = <0x30e0000 0x100>;
+			clocks = <&clk CLK_TEMPSEN>;
+			interrupts = <16 IRQ_TYPE_LEVEL_HIGH>;
+			#thermal-sensor-cells = <0>;
+		};
+
 		i2c0: i2c@4000000 {
 			compatible = "snps,designware-i2c";
 			reg = <0x04000000 0x10000>;
-- 
2.46.2