Add hwmon driver for Moortec PVT controller

Patch 1 adds DT bindings schema in YAML format.
Patch 2 adds driver for MR75203 PVT controller.

v2:
- Address below review concerns from Andy Shevchenko
* Add more info in comments for clamp_val usage for clk sys cycles.
* Add mod_devicetable.h & property.h and remove of.h
* Remove unnecessary additional mutex lock from driver. Rely on regmap's internal lock.
* Use units in timeout macros.
* Use HZ_PER_MHZ instead of direct values.
* Use devm_platform_ioremap_resource_byname() instead of separate calls.
* Use device property read API instead of OF API.
- Address below review concerns from Guenter Roeck
* Improve commit message - add hardware monitoring driver.
* Remove unnecessary platform_set_drvdata. Instead add driver data in function args at one place where it is used. Fix a issue related to it.
* Remove unnecessary NULL assignment.
- Address below review concerns from Philipp Zabel
* Switch to devm_reset_control_get_exclusive().
* Move reset_deassert at the last after clk_enable in probe.
- Resolve make dt_binding_check error.
- Add MODULE_LICENSE

v1:
- Initial version.

Rahul Tanwar (2):
Add DT bindings schema for PVT controller
Add hardware monitoring driver for Moortec MR75203 PVT controller

 .../devicetree/bindings/hwmon/moortec,mr75203.yaml |  70 +++
 drivers/hwmon/Kconfig                              |  10 +
 drivers/hwmon/Makefile                             |   1 +
 drivers/hwmon/mr75203.c                            | 605 +++++++++++++++++++++
 4 files changed, 686 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
 create mode 100644 drivers/hwmon/mr75203.c

2.11.0

PVT controller (MR75203) is used to configure & control Moortec embedded analog IP which contains temprature sensor(TS), voltage monitor(VM) & process detector(PD) modules.

Add DT bindings schema for PVT controller.

---
 .../devicetree/bindings/hwmon/moortec,mr75203.yaml | 70 ++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml

new file mode 100644
index 000000000000..858888461bfe
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/moortec,mr75203.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Moortec Semiconductor MR75203 PVT Controller bindings
+
+maintainers:
+  - Rahul Tanwar <[email protected]>
+
+properties:
+  compatible:
+    const: moortec,mr75203
+
+  reg:
+    items:
+      - description: PVT common registers
+      - description: PVT temprature sensor registers
+      - description: PVT process detector registers
+      - description: PVT voltage monitor registers
+
+  reg-names:
+    items:
+      - const: common
+      - const: ts
+      - const: pd
+      - const: vm
+
+  vm-map:
+    description:
+      PVT controller has 5 VM (voltage monitor) sensors.
+      vm-map defines CPU core to VM instance mapping. A
+      value of 0xff means that VM sensor is unused.
+    maxItems: 5
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - vm-map
+  - clocks
+  - resets
+  - "#thermal-sensor-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    pvt: pvt@e0680000 {
+        compatible = "moortec,mr75203";
+        reg = <0xe0680000 0x80
+               0xe0680080 0x180
+               0xe0680200 0x200
+               0xe0680400 0xc00>;
+        reg-names = "common", "ts", "pd", "vm";
+        vm-map = [03 01 04 ff ff];
+        clocks = <&osc0>;
+        resets = <&rcu0 0x40 7>;
+        #thermal-sensor-cells = <1>;
+    };

2.11.0

My bot found errors running 'make dt_binding_check' on your patch:

/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/hwmon/moortec,mr75203.example.dt.yaml: example-0: pvt@e0680000:reg:0: [3764912128, 128, 3764912256, 384, 3764912640, 512, 3764913152, 3072] is too long
From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/reg.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/hwmon/moortec,mr75203.example.dt.yaml: pvt@e0680000: reg: [[3764912128, 128, 3764912256, 384, 3764912640, 512, 3764913152, 3072]] is too short
From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/hwmon/moortec,mr75203.example.dt.yaml: pvt@e0680000: vm-map: [[3, 1, 4, 255, 255]] is too short
From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/hwmon/moortec,mr75203.yaml

See https://patchwork.ozlabs.org/patch/1372474

If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure dt-schema is up to date:

pip3 install git+https://github.com/devicetree-org/dt-schema.git@master --upgrade

Please check and re-submit.

PVT controller (MR75203) is used to configure & control Moortec embedded analog IP which contains temprature sensor(TS), voltage monitor(VM) & process detector(PD) modules. Add hardware monitoring driver to support MR75203 PVT controller.

---
 drivers/hwmon/Kconfig   |  10 +
 drivers/hwmon/Makefile  |   1 +
 drivers/hwmon/mr75203.c | 605 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 616 insertions(+)
 create mode 100644 drivers/hwmon/mr75203.c

index 8dc28b26916e..2defb46677b4 100644
@@ -1112,6 +1112,16 @@ config SENSORS_MENF21BMC_HWMON
 	  This driver can also be built as a module. If so the module
 	  will be called menf21bmc_hwmon.
 
+config SENSORS_MR75203
+	tristate "Moortec Semiconductor MR75203 PVT Controller"
+	select REGMAP_MMIO
+	help
+	  If you say yes here you get support for Moortec MR75203
+	  PVT controller.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called mr75203.
+
 config SENSORS_ADCXX
 	tristate "National Semiconductor ADCxxxSxxx"
 	depends on SPI_MASTER

index a8f4b35b136b..bb4bd92a5149 100644
@@ -142,6 +142,7 @@ obj-$(CONFIG_SENSORS_MCP3021)	+= mcp3021.o
 obj-$(CONFIG_SENSORS_TC654)	+= tc654.o
 obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o
 obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o
+obj-$(CONFIG_SENSORS_MR75203)	+= mr75203.o
 obj-$(CONFIG_SENSORS_NCT6683)	+= nct6683.o
 obj-$(CONFIG_SENSORS_NCT6775)	+= nct6775.o
 obj-$(CONFIG_SENSORS_NCT7802)	+= nct7802.o

2.11.0