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* [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC
@ 2020-05-13  9:22 Jishnu Prakash
  2020-05-13  9:22 ` [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format Jishnu Prakash
                   ` (4 more replies)
  0 siblings, 5 replies; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-13  9:22 UTC (permalink / raw)
  To: agross, bjorn.andersson, devicetree, linux-kernel, mka,
	linus.walleij, Jonathan.Cameron, andy.shevchenko, amit.kucheria,
	smohanad, kgunda, aghayal
  Cc: linux-arm-msm, linux-arm-msm-owner, Jishnu Prakash

The following changes are made in V4:

Made some recommended minor changes in the third patch. Removed
the info member from adc5_data, and adc exit function, to be
added back in fifth patch.

Added a fifth patch to clean up code common to PMIC5 and PMIC7 ADC.

Jishnu Prakash (5):
  iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format
  iio: adc: Add PMIC7 ADC bindings
  iio: adc: Add support for PMIC7 ADC
  iio: adc: Update error checks and debug prints
  iio: adc: Clean up ADC code common to PMIC5 and PMIC7

 .../devicetree/bindings/iio/adc/qcom,spmi-vadc.txt | 173 -------------
 .../bindings/iio/adc/qcom,spmi-vadc.yaml           | 278 +++++++++++++++++++++
 drivers/iio/adc/qcom-spmi-adc5.c                   | 266 ++++++++++++++++++--
 drivers/iio/adc/qcom-vadc-common.c                 | 260 +++++++++++++++++++
 drivers/iio/adc/qcom-vadc-common.h                 |  15 ++
 include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h    |  67 +++++
 include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h   |  88 +++++++
 include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h   |  46 ++++
 include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h   |  28 +++
 include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h   |  28 +++
 include/dt-bindings/iio/qcom,spmi-vadc.h           |  78 +++++-
 11 files changed, 1134 insertions(+), 193 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
 create mode 100644 Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format
  2020-05-13  9:22 [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC Jishnu Prakash
@ 2020-05-13  9:22 ` Jishnu Prakash
  2020-05-18  7:25   ` Linus Walleij
  2020-05-13  9:22 ` [PATCH V4 2/5] iio: adc: Add PMIC7 ADC bindings Jishnu Prakash
                   ` (3 subsequent siblings)
  4 siblings, 1 reply; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-13  9:22 UTC (permalink / raw)
  To: agross, bjorn.andersson, devicetree, linux-kernel, mka,
	linus.walleij, Jonathan.Cameron, andy.shevchenko, amit.kucheria,
	smohanad, kgunda, aghayal, Jonathan Cameron, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler, Rob Herring,
	Mark Rutland, Jishnu Prakash, Amit Kucheria, linux-iio
  Cc: linux-arm-msm, linux-arm-msm-owner

Convert the adc bindings from .txt to .yaml format.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/iio/adc/qcom,spmi-vadc.txt | 173 --------------
 .../bindings/iio/adc/qcom,spmi-vadc.yaml           | 252 +++++++++++++++++++++
 2 files changed, 252 insertions(+), 173 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
 create mode 100644 Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
deleted file mode 100644
index c878768..0000000
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
+++ /dev/null
@@ -1,173 +0,0 @@
-Qualcomm's SPMI PMIC ADC
-
-- SPMI PMIC voltage ADC (VADC) provides interface to clients to read
-  voltage. The VADC is a 15-bit sigma-delta ADC.
-- SPMI PMIC5 voltage ADC (ADC) provides interface to clients to read
-  voltage. The VADC is a 16-bit sigma-delta ADC.
-
-VADC node:
-
-- compatible:
-    Usage: required
-    Value type: <string>
-    Definition: Should contain "qcom,spmi-vadc".
-                Should contain "qcom,spmi-adc5" for PMIC5 ADC driver.
-                Should contain "qcom,spmi-adc-rev2" for PMIC rev2 ADC driver.
-                Should contain "qcom,pms405-adc" for PMS405 PMIC
-
-- reg:
-    Usage: required
-    Value type: <prop-encoded-array>
-    Definition: VADC base address in the SPMI PMIC register map.
-
-- #address-cells:
-    Usage: required
-    Value type: <u32>
-    Definition: Must be one. Child node 'reg' property should define ADC
-            channel number.
-
-- #size-cells:
-    Usage: required
-    Value type: <u32>
-    Definition: Must be zero.
-
-- #io-channel-cells:
-    Usage: required
-    Value type: <u32>
-    Definition: Must be one. For details about IIO bindings see:
-            Documentation/devicetree/bindings/iio/iio-bindings.txt
-
-- interrupts:
-    Usage: optional
-    Value type: <prop-encoded-array>
-    Definition: End of conversion interrupt.
-
-Channel node properties:
-
-- reg:
-    Usage: required
-    Value type: <u32>
-    Definition: ADC channel number.
-            See include/dt-bindings/iio/qcom,spmi-vadc.h
-
-- label:
-    Usage: required for "qcom,spmi-adc5" and "qcom,spmi-adc-rev2"
-    Value type: <empty>
-    Definition: ADC input of the platform as seen in the schematics.
-            For thermistor inputs connected to generic AMUX or GPIO inputs
-            these can vary across platform for the same pins. Hence select
-            the platform schematics name for this channel.
-
-- qcom,decimation:
-    Usage: optional
-    Value type: <u32>
-    Definition: This parameter is used to decrease ADC sampling rate.
-            Quicker measurements can be made by reducing decimation ratio.
-            - For compatible property "qcom,spmi-vadc", valid values are
-              512, 1024, 2048, 4096. If property is not found, default value
-              of 512 will be used.
-            - For compatible property "qcom,spmi-adc5", valid values are 250, 420
-              and 840. If property is not found, default value of 840 is used.
-            - For compatible property "qcom,spmi-adc-rev2", valid values are 256,
-              512 and 1024. If property is not present, default value is 1024.
-
-- qcom,pre-scaling:
-    Usage: optional
-    Value type: <u32 array>
-    Definition: Used for scaling the channel input signal before the signal is
-            fed to VADC. The configuration for this node is to know the
-            pre-determined ratio and use it for post scaling. Select one from
-            the following options.
-            <1 1>, <1 3>, <1 4>, <1 6>, <1 20>, <1 8>, <10 81>, <1 10>
-            If property is not found default value depending on chip will be used.
-
-- qcom,ratiometric:
-    Usage: optional
-    Value type: <empty>
-    Definition: Channel calibration type.
-            - For compatible property "qcom,spmi-vadc", if this property is
-              specified VADC will use the VDD reference (1.8V) and GND for
-              channel calibration. If property is not found, channel will be
-              calibrated with 0.625V and 1.25V reference channels, also
-              known as absolute calibration.
-            - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2",
-              if this property is specified VADC will use the VDD reference
-              (1.875V) and GND for channel calibration. If property is not found,
-              channel will be calibrated with 0V and 1.25V reference channels,
-              also known as absolute calibration.
-
-- qcom,hw-settle-time:
-    Usage: optional
-    Value type: <u32>
-    Definition: Time between AMUX getting configured and the ADC starting
-            conversion. The 'hw_settle_time' is an index used from valid values
-            and programmed in hardware to achieve the hardware settling delay.
-            - For compatible property "qcom,spmi-vadc" and "qcom,spmi-adc-rev2",
-              Delay = 100us * (hw_settle_time) for hw_settle_time < 11,
-              and 2ms * (hw_settle_time - 10) otherwise.
-              Valid values are: 0, 100, 200, 300, 400, 500, 600, 700, 800,
-              900 us and 1, 2, 4, 6, 8, 10 ms.
-              If property is not found, channel will use 0us.
-            - For compatible property "qcom,spmi-adc5", delay = 15us for
-              value 0, 100us * (value) for values < 11,
-              and 2ms * (value - 10) otherwise.
-              Valid values are: 15, 100, 200, 300, 400, 500, 600, 700, 800,
-              900 us and 1, 2, 4, 6, 8, 10 ms
-              Certain controller digital versions have valid values of
-              15, 100, 200, 300, 400, 500, 600, 700, 1, 2, 4, 8, 16, 32, 64, 128 ms
-              If property is not found, channel will use 15us.
-
-- qcom,avg-samples:
-    Usage: optional
-    Value type: <u32>
-    Definition: Number of samples to be used for measurement.
-            Averaging provides the option to obtain a single measurement
-            from the ADC that is an average of multiple samples. The value
-            selected is 2^(value).
-            - For compatible property "qcom,spmi-vadc", valid values
-              are: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
-              If property is not found, 1 sample will be used.
-            - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2",
-              valid values are: 1, 2, 4, 8, 16
-              If property is not found, 1 sample will be used.
-
-NOTE:
-
-For compatible property "qcom,spmi-vadc" following channels, also known as
-reference point channels, are used for result calibration and their channel
-configuration nodes should be defined:
-VADC_REF_625MV and/or VADC_SPARE1(based on PMIC version) VADC_REF_1250MV,
-VADC_GND_REF and VADC_VDD_VADC.
-
-Example:
-
-#include <dt-bindings/iio/qcom,spmi-vadc.h>
-#include <linux/irq.h>
-/* ... */
-
-	/* VADC node */
-	pmic_vadc: vadc@3100 {
-		compatible = "qcom,spmi-vadc";
-		reg = <0x3100>;
-		interrupts = <0x0 0x31 0x0 IRQ_TYPE_EDGE_RISING>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-		#io-channel-cells = <1>;
-		io-channel-ranges;
-
-		/* Channel node */
-		adc-chan@VADC_LR_MUX10_USB_ID {
-			reg = <VADC_LR_MUX10_USB_ID>;
-			qcom,decimation = <512>;
-			qcom,ratiometric;
-			qcom,hw-settle-time = <200>;
-			qcom,avg-samples = <1>;
-			qcom,pre-scaling = <1 3>;
-		};
-	};
-
-	/* IIO client node */
-	usb {
-		io-channels = <&pmic_vadc VADC_LR_MUX10_USB_ID>;
-		io-channel-names = "vadc";
-	};
diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
new file mode 100644
index 0000000..de8d243
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
@@ -0,0 +1,252 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/qcom,spmi-vadc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm's SPMI PMIC ADC
+
+maintainers:
+  - Andy Gross <agross@kernel.org>
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+description: |
+  SPMI PMIC voltage ADC (VADC) provides interface to clients to read
+  voltage. The VADC is a 15-bit sigma-delta ADC.
+  SPMI PMIC5 voltage ADC (ADC) provides interface to clients to read
+  voltage. The VADC is a 16-bit sigma-delta ADC.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: qcom,pms405-adc
+          - const: qcom,spmi-adc-rev2
+
+      - items:
+        - enum:
+          - qcom,spmi-vadc
+          - qcom,spmi-adc5
+          - qcom,spmi-adc-rev2
+
+  reg:
+    description: VADC base address in the SPMI PMIC register map
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  '#io-channel-cells':
+    const: 1
+
+  interrupts:
+    maxItems: 1
+    description:
+      End of conversion interrupt.
+
+required:
+  - compatible
+  - reg
+  - '#address-cells'
+  - '#size-cells'
+  - '#io-channel-cells'
+
+patternProperties:
+  "^.*@[0-9a-f]+$":
+    type: object
+    description: |
+      Represents the external channels which are connected to the ADC.
+      For compatible property "qcom,spmi-vadc" following channels, also known as
+      reference point channels, are used for result calibration and their channel
+      configuration nodes should be defined:
+      VADC_REF_625MV and/or VADC_SPARE1(based on PMIC version) VADC_REF_1250MV,
+      VADC_GND_REF and VADC_VDD_VADC.
+
+    properties:
+      reg:
+        description: |
+          ADC channel number.
+          See include/dt-bindings/iio/qcom,spmi-vadc.h
+
+      label:
+        $ref: /schemas/types.yaml#/definitions/string
+        description: |
+            ADC input of the platform as seen in the schematics.
+            For thermistor inputs connected to generic AMUX or GPIO inputs
+            these can vary across platform for the same pins. Hence select
+            the platform schematics name for this channel.
+
+      qcom,decimation:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: |
+            This parameter is used to decrease ADC sampling rate.
+            Quicker measurements can be made by reducing decimation ratio.
+
+      qcom,pre-scaling:
+        description: |
+            Used for scaling the channel input signal before the signal is
+            fed to VADC. The configuration for this node is to know the
+            pre-determined ratio and use it for post scaling. It is a pair of
+            integers, denoting the numerator and denominator of the fraction by which
+            input signal is multiplied. For example, <1 3> indicates the signal is scaled
+            down to 1/3 of its value before ADC measurement.
+            If property is not found default value depending on chip will be used.
+        allOf:
+          - $ref: /schemas/types.yaml#/definitions/uint32-array
+        oneOf:
+          - items:
+            - const: 1
+            - enum: [ 1, 3, 4, 6, 20, 8, 10 ]
+
+          - items:
+            - const: 10
+            - const: 81
+
+      qcom,ratiometric:
+        description: |
+            Channel calibration type.
+            - For compatible property "qcom,spmi-vadc", if this property is
+              specified VADC will use the VDD reference (1.8V) and GND for
+              channel calibration. If property is not found, channel will be
+              calibrated with 0.625V and 1.25V reference channels, also
+              known as absolute calibration.
+            - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2",
+              if this property is specified VADC will use the VDD reference (1.875V)
+              and GND for channel calibration. If property is not found, channel
+              will be calibrated with 0V and 1.25V reference channels, also known
+              as absolute calibration.
+        type: boolean
+
+      qcom,hw-settle-time:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: |
+            Time between AMUX getting configured and the ADC starting
+            conversion. The 'hw_settle_time' is an index used from valid values
+            and programmed in hardware to achieve the hardware settling delay.
+
+      qcom,avg-samples:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: |
+            Number of samples to be used for measurement.
+            Averaging provides the option to obtain a single measurement
+            from the ADC that is an average of multiple samples. The value
+            selected is 2^(value).
+
+    required:
+      - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,spmi-vadc
+
+    then:
+      patternProperties:
+        "^.*@[0-9a-f]+$":
+          properties:
+            qcom,decimation:
+              enum: [ 512, 1024, 2048, 4096 ]
+              default: 512
+
+            qcom,hw-settle-time:
+              enum: [ 0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2,
+                      4, 6, 8, 10 ]
+              default: 0
+
+            qcom,avg-samples:
+              enum: [ 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 ]
+              default: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,spmi-adc-rev2
+
+    then:
+      patternProperties:
+        "^.*@[0-9a-f]+$":
+          properties:
+            qcom,decimation:
+              enum: [ 256, 512, 1024 ]
+              default: 1024
+
+            qcom,hw-settle-time:
+              enum: [ 0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2,
+                      4, 6, 8, 10 ]
+              default: 0
+
+            qcom,avg-samples:
+              enum: [ 1, 2, 4, 8, 16 ]
+              default: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,spmi-adc5
+
+    then:
+      patternProperties:
+        "^.*@[0-9a-f]+$":
+          properties:
+            qcom,decimation:
+              enum: [ 250, 420, 840 ]
+              default: 840
+
+            qcom,hw-settle-time:
+              enum: [ 15, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1, 2,
+                      4, 6, 8, 10, 16, 32, 64, 128 ]
+              default: 15
+
+            qcom,avg-samples:
+              enum: [ 1, 2, 4, 8, 16 ]
+              default: 1
+
+examples:
+  - |
+    spmi_bus {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      /* VADC node */
+      pmic_vadc: adc@3100 {
+        compatible = "qcom,spmi-vadc";
+        reg = <0x3100>;
+        interrupts = <0x0 0x31 0x0 0x1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        #io-channel-cells = <1>;
+        io-channel-ranges;
+
+        /* Channel node */
+        adc-chan@39 {
+          reg = <0x39>;
+          qcom,decimation = <512>;
+          qcom,ratiometric;
+          qcom,hw-settle-time = <200>;
+          qcom,avg-samples = <1>;
+          qcom,pre-scaling = <1 3>;
+        };
+
+        adc-chan@9 {
+          reg = <0x9>;
+        };
+
+        adc-chan@a {
+          reg = <0xa>;
+        };
+
+        adc-chan@e {
+          reg = <0xe>;
+        };
+
+        adc-chan@f {
+          reg = <0xf>;
+        };
+      };
+    };
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH V4 2/5] iio: adc: Add PMIC7 ADC bindings
  2020-05-13  9:22 [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC Jishnu Prakash
  2020-05-13  9:22 ` [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format Jishnu Prakash
@ 2020-05-13  9:22 ` Jishnu Prakash
  2020-05-13  9:22 ` [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC Jishnu Prakash
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-13  9:22 UTC (permalink / raw)
  To: agross, bjorn.andersson, devicetree, linux-kernel, mka,
	linus.walleij, Jonathan.Cameron, andy.shevchenko, amit.kucheria,
	smohanad, kgunda, aghayal, Jonathan Cameron, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler, Rob Herring,
	Mark Rutland, Jishnu Prakash, Amit Kucheria, linux-iio,
	linux-arm-msm
  Cc: linux-arm-msm-owner

Add documentation for PMIC7 ADC peripheral.
For the PMIC7-type PMICs, ADC peripheral is present in HW for the
following PMICs: PMK8350, PM8350, PM8350b, PMR735a and PMR735b.
Of these, only the ADC peripheral on PMK8350 is exposed directly to SW.
If SW needs to communicate with ADCs on other PMICs, it specifies the
PMIC to PMK8350 through the newly added SID register and communication
between PMK8350 ADC and other PMIC ADCs is carried out through
PBS(Programmable Boot Sequence) at the firmware level.

In addition, add definitions for ADC channels and virtual channel
definitions (combination of ADC channel number and PMIC SID number)
per PMIC, to be used by ADC clients for PMIC7.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/iio/adc/qcom,spmi-vadc.yaml           | 38 ++++++++--
 include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h    | 67 ++++++++++++++++
 include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h   | 88 ++++++++++++++++++++++
 include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h   | 46 +++++++++++
 include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h   | 28 +++++++
 include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h   | 28 +++++++
 include/dt-bindings/iio/qcom,spmi-vadc.h           | 78 ++++++++++++++++++-
 7 files changed, 366 insertions(+), 7 deletions(-)
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h
 create mode 100644 include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h

diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
index de8d243..e6263b6 100644
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml
@@ -13,7 +13,7 @@ maintainers:
 description: |
   SPMI PMIC voltage ADC (VADC) provides interface to clients to read
   voltage. The VADC is a 15-bit sigma-delta ADC.
-  SPMI PMIC5 voltage ADC (ADC) provides interface to clients to read
+  SPMI PMIC5/PMIC7 voltage ADC (ADC) provides interface to clients to read
   voltage. The VADC is a 16-bit sigma-delta ADC.
 
 properties:
@@ -28,6 +28,7 @@ properties:
           - qcom,spmi-vadc
           - qcom,spmi-adc5
           - qcom,spmi-adc-rev2
+          - qcom,spmi-adc7
 
   reg:
     description: VADC base address in the SPMI PMIC register map
@@ -70,6 +71,8 @@ patternProperties:
         description: |
           ADC channel number.
           See include/dt-bindings/iio/qcom,spmi-vadc.h
+          For PMIC7 ADC, the channel numbers are specified separately per PMIC
+          in the PMIC-specific files in include/dt-bindings/iio/.
 
       label:
         $ref: /schemas/types.yaml#/definitions/string
@@ -113,11 +116,11 @@ patternProperties:
               channel calibration. If property is not found, channel will be
               calibrated with 0.625V and 1.25V reference channels, also
               known as absolute calibration.
-            - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2",
-              if this property is specified VADC will use the VDD reference (1.875V)
-              and GND for channel calibration. If property is not found, channel
-              will be calibrated with 0V and 1.25V reference channels, also known
-              as absolute calibration.
+            - For compatible property "qcom,spmi-adc5", "qcom,spmi-adc7" and
+              "qcom,spmi-adc-rev2", if this property is specified VADC will use
+              the VDD reference (1.875V) and GND for channel calibration. If
+              property is not found, channel will be calibrated with 0V and 1.25V
+              reference channels, also known as absolute calibration.
         type: boolean
 
       qcom,hw-settle-time:
@@ -208,6 +211,29 @@ allOf:
               enum: [ 1, 2, 4, 8, 16 ]
               default: 1
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,spmi-adc7
+
+    then:
+      patternProperties:
+        "^.*@[0-9a-f]+$":
+          properties:
+            qcom,decimation:
+              enum: [ 85, 340, 1360 ]
+              default: 1360
+
+            qcom,hw-settle-time:
+              enum: [ 15, 100, 200, 300, 400, 500, 600, 700, 1000, 2000, 4000,
+                      8000, 16000, 32000, 64000, 128000 ]
+              default: 15
+
+            qcom,avg-samples:
+              enum: [ 1, 2, 4, 8, 16 ]
+              default: 1
+
 examples:
   - |
     spmi_bus {
diff --git a/include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h b/include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h
new file mode 100644
index 0000000..9426f27
--- /dev/null
+++ b/include/dt-bindings/iio/qcom,spmi-adc7-pm8350.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_SPMI_VADC_PM8350_H
+#define _DT_BINDINGS_QCOM_SPMI_VADC_PM8350_H
+
+#ifndef PM8350_SID
+#define PM8350_SID					1
+#endif
+
+/* ADC channels for PM8350_ADC for PMIC7 */
+#define PM8350_ADC7_REF_GND			(PM8350_SID << 8 | 0x0)
+#define PM8350_ADC7_1P25VREF			(PM8350_SID << 8 | 0x01)
+#define PM8350_ADC7_VREF_VADC			(PM8350_SID << 8 | 0x02)
+#define PM8350_ADC7_DIE_TEMP			(PM8350_SID << 8 | 0x03)
+
+#define PM8350_ADC7_AMUX_THM1			(PM8350_SID << 8 | 0x04)
+#define PM8350_ADC7_AMUX_THM2			(PM8350_SID << 8 | 0x05)
+#define PM8350_ADC7_AMUX_THM3			(PM8350_SID << 8 | 0x06)
+#define PM8350_ADC7_AMUX_THM4			(PM8350_SID << 8 | 0x07)
+#define PM8350_ADC7_AMUX_THM5			(PM8350_SID << 8 | 0x08)
+#define PM8350_ADC7_GPIO1			(PM8350_SID << 8 | 0x0a)
+#define PM8350_ADC7_GPIO2			(PM8350_SID << 8 | 0x0b)
+#define PM8350_ADC7_GPIO3			(PM8350_SID << 8 | 0x0c)
+#define PM8350_ADC7_GPIO4			(PM8350_SID << 8 | 0x0d)
+
+/* 30k pull-up1 */
+#define PM8350_ADC7_AMUX_THM1_30K_PU		(PM8350_SID << 8 | 0x24)
+#define PM8350_ADC7_AMUX_THM2_30K_PU		(PM8350_SID << 8 | 0x25)
+#define PM8350_ADC7_AMUX_THM3_30K_PU		(PM8350_SID << 8 | 0x26)
+#define PM8350_ADC7_AMUX_THM4_30K_PU		(PM8350_SID << 8 | 0x27)
+#define PM8350_ADC7_AMUX_THM5_30K_PU		(PM8350_SID << 8 | 0x28)
+#define PM8350_ADC7_GPIO1_30K_PU		(PM8350_SID << 8 | 0x2a)
+#define PM8350_ADC7_GPIO2_30K_PU		(PM8350_SID << 8 | 0x2b)
+#define PM8350_ADC7_GPIO3_30K_PU		(PM8350_SID << 8 | 0x2c)
+#define PM8350_ADC7_GPIO4_30K_PU		(PM8350_SID << 8 | 0x2d)
+
+/* 100k pull-up2 */
+#define PM8350_ADC7_AMUX_THM1_100K_PU		(PM8350_SID << 8 | 0x44)
+#define PM8350_ADC7_AMUX_THM2_100K_PU		(PM8350_SID << 8 | 0x45)
+#define PM8350_ADC7_AMUX_THM3_100K_PU		(PM8350_SID << 8 | 0x46)
+#define PM8350_ADC7_AMUX_THM4_100K_PU		(PM8350_SID << 8 | 0x47)
+#define PM8350_ADC7_AMUX_THM5_100K_PU		(PM8350_SID << 8 | 0x48)
+#define PM8350_ADC7_GPIO1_100K_PU		(PM8350_SID << 8 | 0x4a)
+#define PM8350_ADC7_GPIO2_100K_PU		(PM8350_SID << 8 | 0x4b)
+#define PM8350_ADC7_GPIO3_100K_PU		(PM8350_SID << 8 | 0x4c)
+#define PM8350_ADC7_GPIO4_100K_PU		(PM8350_SID << 8 | 0x4d)
+
+/* 400k pull-up3 */
+#define PM8350_ADC7_AMUX_THM1_400K_PU		(PM8350_SID << 8 | 0x64)
+#define PM8350_ADC7_AMUX_THM2_400K_PU		(PM8350_SID << 8 | 0x65)
+#define PM8350_ADC7_AMUX_THM3_400K_PU		(PM8350_SID << 8 | 0x66)
+#define PM8350_ADC7_AMUX_THM4_400K_PU		(PM8350_SID << 8 | 0x67)
+#define PM8350_ADC7_AMUX_THM5_400K_PU		(PM8350_SID << 8 | 0x68)
+#define PM8350_ADC7_GPIO1_400K_PU		(PM8350_SID << 8 | 0x6a)
+#define PM8350_ADC7_GPIO2_400K_PU		(PM8350_SID << 8 | 0x6b)
+#define PM8350_ADC7_GPIO3_400K_PU		(PM8350_SID << 8 | 0x6c)
+#define PM8350_ADC7_GPIO4_400K_PU		(PM8350_SID << 8 | 0x6d)
+
+/* 1/3 Divider */
+#define PM8350_ADC7_GPIO4_DIV3			(PM8350_SID << 8 | 0x8d)
+
+#define PM8350_ADC7_VPH_PWR			(PM8350_SID << 8 | 0x8e)
+
+#endif /* _DT_BINDINGS_QCOM_SPMI_VADC_PM8350_H */
diff --git a/include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h b/include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h
new file mode 100644
index 0000000..dc2497c
--- /dev/null
+++ b/include/dt-bindings/iio/qcom,spmi-adc7-pm8350b.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_SPMI_VADC_PM8350B_H
+#define _DT_BINDINGS_QCOM_SPMI_VADC_PM8350B_H
+
+#ifndef PM8350B_SID
+#define PM8350B_SID					3
+#endif
+
+/* ADC channels for PM8350B_ADC for PMIC7 */
+#define PM8350B_ADC7_REF_GND			(PM8350B_SID << 8 | 0x0)
+#define PM8350B_ADC7_1P25VREF			(PM8350B_SID << 8 | 0x01)
+#define PM8350B_ADC7_VREF_VADC			(PM8350B_SID << 8 | 0x02)
+#define PM8350B_ADC7_DIE_TEMP			(PM8350B_SID << 8 | 0x03)
+
+#define PM8350B_ADC7_AMUX_THM1			(PM8350B_SID << 8 | 0x04)
+#define PM8350B_ADC7_AMUX_THM2			(PM8350B_SID << 8 | 0x05)
+#define PM8350B_ADC7_AMUX_THM3			(PM8350B_SID << 8 | 0x06)
+#define PM8350B_ADC7_AMUX_THM4			(PM8350B_SID << 8 | 0x07)
+#define PM8350B_ADC7_AMUX_THM5			(PM8350B_SID << 8 | 0x08)
+#define PM8350B_ADC7_AMUX_THM6			(PM8350B_SID << 8 | 0x09)
+#define PM8350B_ADC7_GPIO1			(PM8350B_SID << 8 | 0x0a)
+#define PM8350B_ADC7_GPIO2			(PM8350B_SID << 8 | 0x0b)
+#define PM8350B_ADC7_GPIO3			(PM8350B_SID << 8 | 0x0c)
+#define PM8350B_ADC7_GPIO4			(PM8350B_SID << 8 | 0x0d)
+
+#define PM8350B_ADC7_CHG_TEMP			(PM8350B_SID << 8 | 0x10)
+#define PM8350B_ADC7_USB_IN_V_16		(PM8350B_SID << 8 | 0x11)
+#define PM8350B_ADC7_VDC_16			(PM8350B_SID << 8 | 0x12)
+#define PM8350B_ADC7_CC1_ID			(PM8350B_SID << 8 | 0x13)
+#define PM8350B_ADC7_VREF_BAT_THERM		(PM8350B_SID << 8 | 0x15)
+#define PM8350B_ADC7_IIN_FB			(PM8350B_SID << 8 | 0x17)
+
+/* 30k pull-up1 */
+#define PM8350B_ADC7_AMUX_THM1_30K_PU		(PM8350B_SID << 8 | 0x24)
+#define PM8350B_ADC7_AMUX_THM2_30K_PU		(PM8350B_SID << 8 | 0x25)
+#define PM8350B_ADC7_AMUX_THM3_30K_PU		(PM8350B_SID << 8 | 0x26)
+#define PM8350B_ADC7_AMUX_THM4_30K_PU		(PM8350B_SID << 8 | 0x27)
+#define PM8350B_ADC7_AMUX_THM5_30K_PU		(PM8350B_SID << 8 | 0x28)
+#define PM8350B_ADC7_AMUX_THM6_30K_PU		(PM8350B_SID << 8 | 0x29)
+#define PM8350B_ADC7_GPIO1_30K_PU		(PM8350B_SID << 8 | 0x2a)
+#define PM8350B_ADC7_GPIO2_30K_PU		(PM8350B_SID << 8 | 0x2b)
+#define PM8350B_ADC7_GPIO3_30K_PU		(PM8350B_SID << 8 | 0x2c)
+#define PM8350B_ADC7_GPIO4_30K_PU		(PM8350B_SID << 8 | 0x2d)
+#define PM8350B_ADC7_CC1_ID_30K_PU		(PM8350B_SID << 8 | 0x33)
+
+/* 100k pull-up2 */
+#define PM8350B_ADC7_AMUX_THM1_100K_PU		(PM8350B_SID << 8 | 0x44)
+#define PM8350B_ADC7_AMUX_THM2_100K_PU		(PM8350B_SID << 8 | 0x45)
+#define PM8350B_ADC7_AMUX_THM3_100K_PU		(PM8350B_SID << 8 | 0x46)
+#define PM8350B_ADC7_AMUX_THM4_100K_PU		(PM8350B_SID << 8 | 0x47)
+#define PM8350B_ADC7_AMUX_THM5_100K_PU		(PM8350B_SID << 8 | 0x48)
+#define PM8350B_ADC7_AMUX_THM6_100K_PU		(PM8350B_SID << 8 | 0x49)
+#define PM8350B_ADC7_GPIO1_100K_PU		(PM8350B_SID << 8 | 0x4a)
+#define PM8350B_ADC7_GPIO2_100K_PU		(PM8350B_SID << 8 | 0x4b)
+#define PM8350B_ADC7_GPIO3_100K_PU		(PM8350B_SID << 8 | 0x4c)
+#define PM8350B_ADC7_GPIO4_100K_PU		(PM8350B_SID << 8 | 0x4d)
+#define PM8350B_ADC7_CC1_ID_100K_PU		(PM8350B_SID << 8 | 0x53)
+
+/* 400k pull-up3 */
+#define PM8350B_ADC7_AMUX_THM1_400K_PU		(PM8350B_SID << 8 | 0x64)
+#define PM8350B_ADC7_AMUX_THM2_400K_PU		(PM8350B_SID << 8 | 0x65)
+#define PM8350B_ADC7_AMUX_THM3_400K_PU		(PM8350B_SID << 8 | 0x66)
+#define PM8350B_ADC7_AMUX_THM4_400K_PU		(PM8350B_SID << 8 | 0x67)
+#define PM8350B_ADC7_AMUX_THM5_400K_PU		(PM8350B_SID << 8 | 0x68)
+#define PM8350B_ADC7_AMUX_THM6_400K_PU		(PM8350B_SID << 8 | 0x69)
+#define PM8350B_ADC7_GPIO1_400K_PU		(PM8350B_SID << 8 | 0x6a)
+#define PM8350B_ADC7_GPIO2_400K_PU		(PM8350B_SID << 8 | 0x6b)
+#define PM8350B_ADC7_GPIO3_400K_PU		(PM8350B_SID << 8 | 0x6c)
+#define PM8350B_ADC7_GPIO4_400K_PU		(PM8350B_SID << 8 | 0x6d)
+#define PM8350B_ADC7_CC1_ID_400K_PU		(PM8350B_SID << 8 | 0x73)
+
+/* 1/3 Divider */
+#define PM8350B_ADC7_GPIO1_DIV3			(PM8350B_SID << 8 | 0x8a)
+#define PM8350B_ADC7_GPIO2_DIV3			(PM8350B_SID << 8 | 0x8b)
+#define PM8350B_ADC7_GPIO3_DIV3			(PM8350B_SID << 8 | 0x8c)
+#define PM8350B_ADC7_GPIO4_DIV3			(PM8350B_SID << 8 | 0x8d)
+
+#define PM8350B_ADC7_VPH_PWR			(PM8350B_SID << 8 | 0x8e)
+#define PM8350B_ADC7_VBAT_SNS			(PM8350B_SID << 8 | 0x8f)
+
+#define PM8350B_ADC7_SBUx			(PM8350B_SID << 8 | 0x94)
+#define PM8350B_ADC7_VBAT_2S_MID		(PM8350B_SID << 8 | 0x96)
+
+#endif /* _DT_BINDINGS_QCOM_SPMI_VADC_PM8350B_H */
diff --git a/include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h b/include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h
new file mode 100644
index 0000000..6c29687
--- /dev/null
+++ b/include/dt-bindings/iio/qcom,spmi-adc7-pmk8350.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_SPMI_VADC_PMK8350_H
+#define _DT_BINDINGS_QCOM_SPMI_VADC_PMK8350_H
+
+#ifndef PMK8350_SID
+#define PMK8350_SID					0
+#endif
+
+/* ADC channels for PMK8350_ADC for PMIC7 */
+#define PMK8350_ADC7_REF_GND			(PMK8350_SID << 8 | 0x0)
+#define PMK8350_ADC7_1P25VREF			(PMK8350_SID << 8 | 0x01)
+#define PMK8350_ADC7_VREF_VADC			(PMK8350_SID << 8 | 0x02)
+#define PMK8350_ADC7_DIE_TEMP			(PMK8350_SID << 8 | 0x03)
+
+#define PMK8350_ADC7_AMUX_THM1			(PMK8350_SID << 8 | 0x04)
+#define PMK8350_ADC7_AMUX_THM2			(PMK8350_SID << 8 | 0x05)
+#define PMK8350_ADC7_AMUX_THM3			(PMK8350_SID << 8 | 0x06)
+#define PMK8350_ADC7_AMUX_THM4			(PMK8350_SID << 8 | 0x07)
+#define PMK8350_ADC7_AMUX_THM5			(PMK8350_SID << 8 | 0x08)
+
+/* 30k pull-up1 */
+#define PMK8350_ADC7_AMUX_THM1_30K_PU		(PMK8350_SID << 8 | 0x24)
+#define PMK8350_ADC7_AMUX_THM2_30K_PU		(PMK8350_SID << 8 | 0x25)
+#define PMK8350_ADC7_AMUX_THM3_30K_PU		(PMK8350_SID << 8 | 0x26)
+#define PMK8350_ADC7_AMUX_THM4_30K_PU		(PMK8350_SID << 8 | 0x27)
+#define PMK8350_ADC7_AMUX_THM5_30K_PU		(PMK8350_SID << 8 | 0x28)
+
+/* 100k pull-up2 */
+#define PMK8350_ADC7_AMUX_THM1_100K_PU		(PMK8350_SID << 8 | 0x44)
+#define PMK8350_ADC7_AMUX_THM2_100K_PU		(PMK8350_SID << 8 | 0x45)
+#define PMK8350_ADC7_AMUX_THM3_100K_PU		(PMK8350_SID << 8 | 0x46)
+#define PMK8350_ADC7_AMUX_THM4_100K_PU		(PMK8350_SID << 8 | 0x47)
+#define PMK8350_ADC7_AMUX_THM5_100K_PU		(PMK8350_SID << 8 | 0x48)
+
+/* 400k pull-up3 */
+#define PMK8350_ADC7_AMUX_THM1_400K_PU		(PMK8350_SID << 8 | 0x64)
+#define PMK8350_ADC7_AMUX_THM2_400K_PU		(PMK8350_SID << 8 | 0x65)
+#define PMK8350_ADC7_AMUX_THM3_400K_PU		(PMK8350_SID << 8 | 0x66)
+#define PMK8350_ADC7_AMUX_THM4_400K_PU		(PMK8350_SID << 8 | 0x67)
+#define PMK8350_ADC7_AMUX_THM5_400K_PU		(PMK8350_SID << 8 | 0x68)
+
+#endif /* _DT_BINDINGS_QCOM_SPMI_VADC_PMK8350_H */
diff --git a/include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h b/include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h
new file mode 100644
index 0000000..d6df1b1
--- /dev/null
+++ b/include/dt-bindings/iio/qcom,spmi-adc7-pmr735a.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_SPMI_VADC_PMR735A_H
+#define _DT_BINDINGS_QCOM_SPMI_VADC_PMR735A_H
+
+#ifndef PMR735A_SID
+#define PMR735A_SID					4
+#endif
+
+/* ADC channels for PMR735A_ADC for PMIC7 */
+#define PMR735A_ADC7_REF_GND			(PMR735A_SID << 8 | 0x0)
+#define PMR735A_ADC7_1P25VREF			(PMR735A_SID << 8 | 0x01)
+#define PMR735A_ADC7_VREF_VADC			(PMR735A_SID << 8 | 0x02)
+#define PMR735A_ADC7_DIE_TEMP			(PMR735A_SID << 8 | 0x03)
+
+#define PMR735A_ADC7_GPIO1			(PMR735A_SID << 8 | 0x0a)
+#define PMR735A_ADC7_GPIO2			(PMR735A_SID << 8 | 0x0b)
+#define PMR735A_ADC7_GPIO3			(PMR735A_SID << 8 | 0x0c)
+
+/* 100k pull-up2 */
+#define PMR735A_ADC7_GPIO1_100K_PU		(PMR735A_SID << 8 | 0x4a)
+#define PMR735A_ADC7_GPIO2_100K_PU		(PMR735A_SID << 8 | 0x4b)
+#define PMR735A_ADC7_GPIO3_100K_PU		(PMR735A_SID << 8 | 0x4c)
+
+#endif /* _DT_BINDINGS_QCOM_SPMI_VADC_PMR735A_H */
diff --git a/include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h b/include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h
new file mode 100644
index 0000000..8da0e7d
--- /dev/null
+++ b/include/dt-bindings/iio/qcom,spmi-adc7-pmr735b.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_QCOM_SPMI_VADC_PMR735B_H
+#define _DT_BINDINGS_QCOM_SPMI_VADC_PMR735B_H
+
+#ifndef PMR735B_SID
+#define PMR735B_SID					5
+#endif
+
+/* ADC channels for PMR735B_ADC for PMIC7 */
+#define PMR735B_ADC7_REF_GND			(PMR735B_SID << 8 | 0x0)
+#define PMR735B_ADC7_1P25VREF			(PMR735B_SID << 8 | 0x01)
+#define PMR735B_ADC7_VREF_VADC			(PMR735B_SID << 8 | 0x02)
+#define PMR735B_ADC7_DIE_TEMP			(PMR735B_SID << 8 | 0x03)
+
+#define PMR735B_ADC7_GPIO1			(PMR735B_SID << 8 | 0x0a)
+#define PMR735B_ADC7_GPIO2			(PMR735B_SID << 8 | 0x0b)
+#define PMR735B_ADC7_GPIO3			(PMR735B_SID << 8 | 0x0c)
+
+/* 100k pull-up2 */
+#define PMR735B_ADC7_GPIO1_100K_PU		(PMR735B_SID << 8 | 0x4a)
+#define PMR735B_ADC7_GPIO2_100K_PU		(PMR735B_SID << 8 | 0x4b)
+#define PMR735B_ADC7_GPIO3_100K_PU		(PMR735B_SID << 8 | 0x4c)
+
+#endif /* _DT_BINDINGS_QCOM_SPMI_VADC_PMR735B_H */
diff --git a/include/dt-bindings/iio/qcom,spmi-vadc.h b/include/dt-bindings/iio/qcom,spmi-vadc.h
index 61d556d..08adfe2 100644
--- a/include/dt-bindings/iio/qcom,spmi-vadc.h
+++ b/include/dt-bindings/iio/qcom,spmi-vadc.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (c) 2012-2014,2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2014,2018,2020 The Linux Foundation. All rights reserved.
  */
 
 #ifndef _DT_BINDINGS_QCOM_SPMI_VADC_H
@@ -221,4 +221,80 @@
 
 #define ADC5_MAX_CHANNEL			0xc0
 
+/* ADC channels for ADC for PMIC7 */
+
+#define ADC7_REF_GND				0x00
+#define ADC7_1P25VREF				0x01
+#define ADC7_VREF_VADC				0x02
+#define ADC7_DIE_TEMP				0x03
+
+#define ADC7_AMUX_THM1				0x04
+#define ADC7_AMUX_THM2				0x05
+#define ADC7_AMUX_THM3				0x06
+#define ADC7_AMUX_THM4				0x07
+#define ADC7_AMUX_THM5				0x08
+#define ADC7_AMUX_THM6				0x09
+#define ADC7_GPIO1				0x0a
+#define ADC7_GPIO2				0x0b
+#define ADC7_GPIO3				0x0c
+#define ADC7_GPIO4				0x0d
+
+#define ADC7_CHG_TEMP				0x10
+#define ADC7_USB_IN_V_16			0x11
+#define ADC7_VDC_16				0x12
+#define ADC7_CC1_ID				0x13
+#define ADC7_VREF_BAT_THERM			0x15
+#define ADC7_IIN_FB				0x17
+
+/* 30k pull-up1 */
+#define ADC7_AMUX_THM1_30K_PU			0x24
+#define ADC7_AMUX_THM2_30K_PU			0x25
+#define ADC7_AMUX_THM3_30K_PU			0x26
+#define ADC7_AMUX_THM4_30K_PU			0x27
+#define ADC7_AMUX_THM5_30K_PU			0x28
+#define ADC7_AMUX_THM6_30K_PU			0x29
+#define ADC7_GPIO1_30K_PU			0x2a
+#define ADC7_GPIO2_30K_PU			0x2b
+#define ADC7_GPIO3_30K_PU			0x2c
+#define ADC7_GPIO4_30K_PU			0x2d
+#define ADC7_CC1_ID_30K_PU			0x33
+
+/* 100k pull-up2 */
+#define ADC7_AMUX_THM1_100K_PU			0x44
+#define ADC7_AMUX_THM2_100K_PU			0x45
+#define ADC7_AMUX_THM3_100K_PU			0x46
+#define ADC7_AMUX_THM4_100K_PU			0x47
+#define ADC7_AMUX_THM5_100K_PU			0x48
+#define ADC7_AMUX_THM6_100K_PU			0x49
+#define ADC7_GPIO1_100K_PU			0x4a
+#define ADC7_GPIO2_100K_PU			0x4b
+#define ADC7_GPIO3_100K_PU			0x4c
+#define ADC7_GPIO4_100K_PU			0x4d
+#define ADC7_CC1_ID_100K_PU			0x53
+
+/* 400k pull-up3 */
+#define ADC7_AMUX_THM1_400K_PU			0x64
+#define ADC7_AMUX_THM2_400K_PU			0x65
+#define ADC7_AMUX_THM3_400K_PU			0x66
+#define ADC7_AMUX_THM4_400K_PU			0x67
+#define ADC7_AMUX_THM5_400K_PU			0x68
+#define ADC7_AMUX_THM6_400K_PU			0x69
+#define ADC7_GPIO1_400K_PU			0x6a
+#define ADC7_GPIO2_400K_PU			0x6b
+#define ADC7_GPIO3_400K_PU			0x6c
+#define ADC7_GPIO4_400K_PU			0x6d
+#define ADC7_CC1_ID_400K_PU			0x73
+
+/* 1/3 Divider */
+#define ADC7_GPIO1_DIV3				0x8a
+#define ADC7_GPIO2_DIV3				0x8b
+#define ADC7_GPIO3_DIV3				0x8c
+#define ADC7_GPIO4_DIV3				0x8d
+
+#define ADC7_VPH_PWR				0x8e
+#define ADC7_VBAT_SNS				0x8f
+
+#define ADC7_SBUx				0x94
+#define ADC7_VBAT_2S_MID			0x96
+
 #endif /* _DT_BINDINGS_QCOM_SPMI_VADC_H */
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC
  2020-05-13  9:22 [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC Jishnu Prakash
  2020-05-13  9:22 ` [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format Jishnu Prakash
  2020-05-13  9:22 ` [PATCH V4 2/5] iio: adc: Add PMIC7 ADC bindings Jishnu Prakash
@ 2020-05-13  9:22 ` Jishnu Prakash
  2020-05-13  9:48   ` Andy Shevchenko
  2020-05-13  9:22 ` [PATCH V4 4/5] iio: adc: Update error checks and debug prints Jishnu Prakash
  2020-05-13  9:22 ` [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7 Jishnu Prakash
  4 siblings, 1 reply; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-13  9:22 UTC (permalink / raw)
  To: agross, bjorn.andersson, devicetree, linux-kernel, mka,
	linus.walleij, Jonathan.Cameron, andy.shevchenko, amit.kucheria,
	smohanad, kgunda, aghayal, Jonathan Cameron, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler, linux-arm-msm,
	linux-iio
  Cc: linux-arm-msm-owner, Jishnu Prakash

The ADC architecture on PMIC7 is changed as compared to PMIC5. The
major change from PMIC5 is that all SW communication to ADC goes through
PMK8350, which communicates with other PMICs through PBS when the ADC
on PMK8350 works in master mode. The SID register is used to identify the
PMICs with which the PBS needs to communicate. Add support for the same.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
---
 drivers/iio/adc/qcom-spmi-adc5.c   | 225 +++++++++++++++++++++++++++++++-
 drivers/iio/adc/qcom-vadc-common.c | 260 +++++++++++++++++++++++++++++++++++++
 drivers/iio/adc/qcom-vadc-common.h |  14 ++
 3 files changed, 495 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 21fdcde..6d6b611 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018, 2020, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/bitops.h>
@@ -23,6 +23,7 @@
 
 #define ADC5_USR_REVISION1			0x0
 #define ADC5_USR_STATUS1			0x8
+#define ADC5_USR_STATUS1_CONV_FAULT		BIT(7)
 #define ADC5_USR_STATUS1_REQ_STS		BIT(1)
 #define ADC5_USR_STATUS1_EOC			BIT(0)
 #define ADC5_USR_STATUS1_REQ_STS_EOC_MASK	0x3
@@ -65,6 +66,9 @@
 
 #define ADC5_USR_IBAT_DATA1			0x53
 
+#define ADC_CHANNEL_OFFSET			0x8
+#define ADC_CHANNEL_MASK			GENMASK(7, 0)
+
 /*
  * Conversion time varies based on the decimation, clock rate, fast average
  * samples and measurements queued across different VADC peripherals.
@@ -79,6 +83,11 @@
 #define ADC5_HW_SETTLE_DIFF_MINOR		3
 #define ADC5_HW_SETTLE_DIFF_MAJOR		5
 
+/* For PMIC7 */
+#define ADC_APP_SID				0x40
+#define ADC_APP_SID_MASK			GENMASK(3, 0)
+#define ADC7_CONV_TIMEOUT			msecs_to_jiffies(10)
+
 enum adc5_cal_method {
 	ADC5_NO_CAL = 0,
 	ADC5_RATIOMETRIC_CAL,
@@ -96,6 +105,7 @@ enum adc5_cal_val {
  * @cal_method: calibration method.
  * @cal_val: calibration value
  * @decimation: sampling rate supported for the channel.
+ * @sid: slave id of PMIC owning the channel, for PMIC7.
  * @prescale: channel scaling performed on the input signal.
  * @hw_settle_time: the time between AMUX being configured and the
  *	start of conversion.
@@ -110,6 +120,7 @@ struct adc5_channel_prop {
 	enum adc5_cal_method	cal_method;
 	enum adc5_cal_val	cal_val;
 	unsigned int		decimation;
+	unsigned int		sid;
 	unsigned int		prescale;
 	unsigned int		hw_settle_time;
 	unsigned int		avg_samples;
@@ -140,6 +151,7 @@ struct adc5_chip {
 	bool			poll_eoc;
 	struct completion	complete;
 	struct mutex		lock;
+	int			irq_eoc;
 	const struct adc5_data	*data;
 };
 
@@ -155,6 +167,8 @@ static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
 	{.num =  1, .den = 16}
 };
 
+static const struct adc5_data adc7_data_pmic;
+
 static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)
 {
 	return regmap_bulk_read(adc->regmap, adc->base + offset, data, len);
@@ -165,6 +179,11 @@ static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len)
 	return regmap_bulk_write(adc->regmap, adc->base + offset, data, len);
 }
 
+static int adc5_masked_write(struct adc5_chip *adc, u16 offset, u8 mask, u8 val)
+{
+	return regmap_update_bits(adc->regmap, adc->base + offset, mask, val);
+}
+
 static int adc5_prescaling_from_dt(u32 num, u32 den)
 {
 	unsigned int pre;
@@ -314,6 +333,47 @@ static int adc5_configure(struct adc5_chip *adc,
 	return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
 }
 
+static int adc7_configure(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop)
+{
+	int ret;
+	u8 conv_req = 0, buf[4];
+
+	ret = adc5_masked_write(adc, ADC_APP_SID, ADC_APP_SID_MASK, prop->sid);
+	if (ret)
+		return ret;
+
+	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	/* Digital param selection */
+	adc5_update_dig_param(adc, prop, &buf[0]);
+
+	/* Update fast average sample value */
+	buf[1] &= ~ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK;
+	buf[1] |= prop->avg_samples;
+
+	/* Select ADC channel */
+	buf[2] = prop->channel;
+
+	/* Select HW settle delay for channel */
+	buf[3] &= ~ADC5_USR_HW_SETTLE_DELAY_MASK;
+	buf[3] |= prop->hw_settle_time;
+
+	/* Select CONV request */
+	conv_req = ADC5_USR_CONV_REQ_REQ;
+
+	if (!adc->poll_eoc)
+		reinit_completion(&adc->complete);
+
+	ret = adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
+	if (ret)
+		return ret;
+
+	return adc5_write(adc, ADC5_USR_CONV_REQ, &conv_req, 1);
+}
+
 static int adc5_do_conversion(struct adc5_chip *adc,
 			struct adc5_channel_prop *prop,
 			struct iio_chan_spec const *chan,
@@ -355,6 +415,43 @@ static int adc5_do_conversion(struct adc5_chip *adc,
 	return ret;
 }
 
+static int adc7_do_conversion(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur)
+{
+	int ret;
+	u8 status;
+
+	mutex_lock(&adc->lock);
+
+	ret = adc7_configure(adc, prop);
+	if (ret) {
+		dev_err(adc->dev, "ADC configure failed with %d\n", ret);
+		goto unlock;
+	}
+
+	/* No support for polling mode at present */
+	wait_for_completion_timeout(&adc->complete, ADC7_CONV_TIMEOUT);
+
+	ret = adc5_read(adc, ADC5_USR_STATUS1, &status, 1);
+	if (ret < 0)
+		goto unlock;
+
+	if (status & ADC5_USR_STATUS1_CONV_FAULT) {
+		dev_err(adc->dev, "Unexpected conversion fault\n");
+		ret = -EIO;
+		goto unlock;
+	}
+
+	ret = adc5_read_voltage_data(adc, data_volt);
+
+unlock:
+	mutex_unlock(&adc->lock);
+
+	return ret;
+}
+
 static irqreturn_t adc5_isr(int irq, void *dev_id)
 {
 	struct adc5_chip *adc = dev_id;
@@ -377,6 +474,22 @@ static int adc5_of_xlate(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
+static int adc7_of_xlate(struct iio_dev *indio_dev,
+				const struct of_phandle_args *iiospec)
+{
+	struct adc5_chip *adc = iio_priv(indio_dev);
+	int i, v_channel;
+
+	for (i = 0; i < adc->nchannels; i++) {
+		v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET |
+			adc->chan_props[i].channel);
+		if (v_channel == iiospec->args[0])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
 static int adc5_read_raw(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
 			 long mask)
@@ -410,11 +523,50 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 	return 0;
 }
 
+static int adc7_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	struct adc5_chip *adc = iio_priv(indio_dev);
+	struct adc5_channel_prop *prop;
+	u16 adc_code_volt, adc_code_cur;
+	int ret;
+
+	prop = &adc->chan_props[chan->address];
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		ret = adc7_do_conversion(adc, prop, chan,
+					&adc_code_volt, &adc_code_cur);
+		if (ret)
+			return ret;
+
+		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
+			&adc5_prescale_ratios[prop->prescale],
+			adc->data,
+			adc_code_volt, val);
+
+		if (ret)
+			return ret;
+
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static const struct iio_info adc5_info = {
 	.read_raw = adc5_read_raw,
 	.of_xlate = adc5_of_xlate,
 };
 
+static const struct iio_info adc7_info = {
+	.read_raw = adc7_read_raw,
+	.of_xlate = adc7_of_xlate,
+};
+
 struct adc5_channels {
 	const char *datasheet_name;
 	unsigned int prescale_index;
@@ -477,6 +629,39 @@ static const struct adc5_channels adc5_chans_pmic[ADC5_MAX_CHANNEL] = {
 					SCALE_HW_CALIB_PM5_SMB_TEMP)
 };
 
+static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = {
+	[ADC7_REF_GND]		= ADC5_CHAN_VOLT("ref_gnd", 0,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_1P25VREF]		= ADC5_CHAN_VOLT("vref_1p25", 0,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_VPH_PWR]		= ADC5_CHAN_VOLT("vph_pwr", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_VBAT_SNS]		= ADC5_CHAN_VOLT("vbat_sns", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_DIE_TEMP]		= ADC5_CHAN_TEMP("die_temp", 0,
+					SCALE_HW_CALIB_PMIC_THERM_PM7)
+	[ADC7_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM6_100K_PU] = ADC5_CHAN_TEMP("amux_thm6_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO1_100K_PU]	= ADC5_CHAN_TEMP("gpio1_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO2_100K_PU]	= ADC5_CHAN_TEMP("gpio2_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO3_100K_PU]	= ADC5_CHAN_TEMP("gpio3_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO4_100K_PU]	= ADC5_CHAN_TEMP("gpio4_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+};
+
 static const struct adc5_channels adc5_chans_rev2[ADC5_MAX_CHANNEL] = {
 	[ADC5_REF_GND]		= ADC5_CHAN_VOLT("ref_gnd", 0,
 					SCALE_HW_CALIB_DEFAULT)
@@ -511,6 +696,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 {
 	const char *name = node->name, *channel_name;
 	u32 chan, value, varr[2];
+	u32 sid = 0;
 	int ret;
 	struct device *dev = adc->dev;
 
@@ -520,6 +706,15 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 		return ret;
 	}
 
+	/* Value read from "reg" is virtual channel number */
+
+	/* virtual channel number = sid << 8 | channel number */
+
+	if (adc->data == &adc7_data_pmic) {
+		sid = chan >> ADC_CHANNEL_OFFSET;
+		chan = chan & ADC_CHANNEL_MASK;
+	}
+
 	if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA ||
 	    !data->adc_chans[chan].datasheet_name) {
 		dev_err(dev, "%s invalid channel number %d\n", name, chan);
@@ -528,6 +723,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 	/* the channel has DT description */
 	prop->channel = chan;
+	prop->sid = sid;
 
 	channel_name = of_get_property(node,
 				"label", NULL) ? : node->name;
@@ -578,8 +774,9 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 		pr_debug("dig_ver:minor:%d, major:%d\n", dig_version[0],
 						dig_version[1]);
 		/* Digital controller >= 5.3 have hw_settle_2 option */
-		if (dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
-			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR)
+		if ((dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
+			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR) ||
+			adc->data == &adc7_data_pmic)
 			ret = adc5_hw_settle_time_from_dt(value,
 							data->hw_settle_2);
 		else
@@ -639,6 +836,17 @@ static const struct adc5_data adc5_data_pmic = {
 				1, 2, 4, 8, 16, 32, 64, 128},
 };
 
+static const struct adc5_data adc7_data_pmic = {
+	.full_scale_code_volt = 0x70e4,
+	.adc_chans = adc7_chans_pmic,
+	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
+				{85, 340, 1360},
+	.hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
+				{15, 100, 200, 300, 400, 500, 600, 700,
+				1000, 2000, 4000, 8000, 16000, 32000,
+				64000, 128000},
+};
+
 static const struct adc5_data adc5_data_pmic_rev2 = {
 	.full_scale_code_volt = 0x4000,
 	.full_scale_code_cur = 0x1800,
@@ -659,6 +867,10 @@ static const struct of_device_id adc5_match_table[] = {
 		.data = &adc5_data_pmic,
 	},
 	{
+		.compatible = "qcom,spmi-adc7",
+		.data = &adc7_data_pmic,
+	},
+	{
 		.compatible = "qcom,spmi-adc-rev2",
 		.data = &adc5_data_pmic_rev2,
 	},
@@ -752,6 +964,12 @@ static int adc5_probe(struct platform_device *pdev)
 	adc->regmap = regmap;
 	adc->dev = dev;
 	adc->base = reg;
+
+	if (of_device_is_compatible(node, "qcom,spmi-adc7"))
+		indio_dev->info = &adc7_info;
+	else
+		indio_dev->info = &adc5_info;
+
 	init_completion(&adc->complete);
 	mutex_init(&adc->lock);
 
@@ -777,7 +995,6 @@ static int adc5_probe(struct platform_device *pdev)
 	indio_dev->dev.of_node = node;
 	indio_dev->name = pdev->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->info = &adc5_info;
 	indio_dev->channels = adc->iio_chans;
 	indio_dev->num_channels = adc->nchannels;
 
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c
index 2bb78d1..b6915c2 100644
--- a/drivers/iio/adc/qcom-vadc-common.c
+++ b/drivers/iio/adc/qcom-vadc-common.c
@@ -89,6 +89,195 @@ static const struct vadc_map_pt adcmap_100k_104ef_104fb_1875_vref[] = {
 	{ 46,	125000 },
 };
 
+static const struct vadc_map_pt adcmap7_die_temp[] = {
+	{ 433700, 1967},
+	{ 473100, 1964},
+	{ 512400, 1957},
+	{ 551500, 1949},
+	{ 590500, 1940},
+	{ 629300, 1930},
+	{ 667900, 1921},
+	{ 706400, 1910},
+	{ 744600, 1896},
+	{ 782500, 1878},
+	{ 820100, 1859},
+	{ 857300, 0},
+};
+
+/*
+ * Resistance to temperature table for 100k pull up for NTCG104EF104.
+ */
+static const struct vadc_map_pt adcmap7_100k[] = {
+	{ 4250657, -40960 },
+	{ 3962085, -39936 },
+	{ 3694875, -38912 },
+	{ 3447322, -37888 },
+	{ 3217867, -36864 },
+	{ 3005082, -35840 },
+	{ 2807660, -34816 },
+	{ 2624405, -33792 },
+	{ 2454218, -32768 },
+	{ 2296094, -31744 },
+	{ 2149108, -30720 },
+	{ 2012414, -29696 },
+	{ 1885232, -28672 },
+	{ 1766846, -27648 },
+	{ 1656598, -26624 },
+	{ 1553884, -25600 },
+	{ 1458147, -24576 },
+	{ 1368873, -23552 },
+	{ 1285590, -22528 },
+	{ 1207863, -21504 },
+	{ 1135290, -20480 },
+	{ 1067501, -19456 },
+	{ 1004155, -18432 },
+	{ 944935, -17408 },
+	{ 889550, -16384 },
+	{ 837731, -15360 },
+	{ 789229, -14336 },
+	{ 743813, -13312 },
+	{ 701271, -12288 },
+	{ 661405, -11264 },
+	{ 624032, -10240 },
+	{ 588982, -9216 },
+	{ 556100, -8192 },
+	{ 525239, -7168 },
+	{ 496264, -6144 },
+	{ 469050, -5120 },
+	{ 443480, -4096 },
+	{ 419448, -3072 },
+	{ 396851, -2048 },
+	{ 375597, -1024 },
+	{ 355598, 0 },
+	{ 336775, 1024 },
+	{ 319052, 2048 },
+	{ 302359, 3072 },
+	{ 286630, 4096 },
+	{ 271806, 5120 },
+	{ 257829, 6144 },
+	{ 244646, 7168 },
+	{ 232209, 8192 },
+	{ 220471, 9216 },
+	{ 209390, 10240 },
+	{ 198926, 11264 },
+	{ 189040, 12288 },
+	{ 179698, 13312 },
+	{ 170868, 14336 },
+	{ 162519, 15360 },
+	{ 154622, 16384 },
+	{ 147150, 17408 },
+	{ 140079, 18432 },
+	{ 133385, 19456 },
+	{ 127046, 20480 },
+	{ 121042, 21504 },
+	{ 115352, 22528 },
+	{ 109960, 23552 },
+	{ 104848, 24576 },
+	{ 100000, 25600 },
+	{ 95402, 26624 },
+	{ 91038, 27648 },
+	{ 86897, 28672 },
+	{ 82965, 29696 },
+	{ 79232, 30720 },
+	{ 75686, 31744 },
+	{ 72316, 32768 },
+	{ 69114, 33792 },
+	{ 66070, 34816 },
+	{ 63176, 35840 },
+	{ 60423, 36864 },
+	{ 57804, 37888 },
+	{ 55312, 38912 },
+	{ 52940, 39936 },
+	{ 50681, 40960 },
+	{ 48531, 41984 },
+	{ 46482, 43008 },
+	{ 44530, 44032 },
+	{ 42670, 45056 },
+	{ 40897, 46080 },
+	{ 39207, 47104 },
+	{ 37595, 48128 },
+	{ 36057, 49152 },
+	{ 34590, 50176 },
+	{ 33190, 51200 },
+	{ 31853, 52224 },
+	{ 30577, 53248 },
+	{ 29358, 54272 },
+	{ 28194, 55296 },
+	{ 27082, 56320 },
+	{ 26020, 57344 },
+	{ 25004, 58368 },
+	{ 24033, 59392 },
+	{ 23104, 60416 },
+	{ 22216, 61440 },
+	{ 21367, 62464 },
+	{ 20554, 63488 },
+	{ 19776, 64512 },
+	{ 19031, 65536 },
+	{ 18318, 66560 },
+	{ 17636, 67584 },
+	{ 16982, 68608 },
+	{ 16355, 69632 },
+	{ 15755, 70656 },
+	{ 15180, 71680 },
+	{ 14628, 72704 },
+	{ 14099, 73728 },
+	{ 13592, 74752 },
+	{ 13106, 75776 },
+	{ 12640, 76800 },
+	{ 12192, 77824 },
+	{ 11762, 78848 },
+	{ 11350, 79872 },
+	{ 10954, 80896 },
+	{ 10574, 81920 },
+	{ 10209, 82944 },
+	{ 9858, 83968 },
+	{ 9521, 84992 },
+	{ 9197, 86016 },
+	{ 8886, 87040 },
+	{ 8587, 88064 },
+	{ 8299, 89088 },
+	{ 8023, 90112 },
+	{ 7757, 91136 },
+	{ 7501, 92160 },
+	{ 7254, 93184 },
+	{ 7017, 94208 },
+	{ 6789, 95232 },
+	{ 6570, 96256 },
+	{ 6358, 97280 },
+	{ 6155, 98304 },
+	{ 5959, 99328 },
+	{ 5770, 100352 },
+	{ 5588, 101376 },
+	{ 5412, 102400 },
+	{ 5243, 103424 },
+	{ 5080, 104448 },
+	{ 4923, 105472 },
+	{ 4771, 106496 },
+	{ 4625, 107520 },
+	{ 4484, 108544 },
+	{ 4348, 109568 },
+	{ 4217, 110592 },
+	{ 4090, 111616 },
+	{ 3968, 112640 },
+	{ 3850, 113664 },
+	{ 3736, 114688 },
+	{ 3626, 115712 },
+	{ 3519, 116736 },
+	{ 3417, 117760 },
+	{ 3317, 118784 },
+	{ 3221, 119808 },
+	{ 3129, 120832 },
+	{ 3039, 121856 },
+	{ 2952, 122880 },
+	{ 2868, 123904 },
+	{ 2787, 124928 },
+	{ 2709, 125952 },
+	{ 2633, 126976 },
+	{ 2560, 128000 },
+	{ 2489, 129024 },
+	{ 2420, 130048 }
+};
+
 static int qcom_vadc_scale_hw_calib_volt(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -97,6 +286,10 @@ static int qcom_vadc_scale_hw_calib_therm(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
 				u16 adc_code, int *result_mdec);
+static int qcom_vadc7_scale_hw_calib_therm(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
 static int qcom_vadc_scale_hw_smb_temp(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -109,12 +302,20 @@ static int qcom_vadc_scale_hw_calib_die_temp(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
 				u16 adc_code, int *result_mdec);
+static int qcom_vadc7_scale_hw_calib_die_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
 
 static struct qcom_adc5_scale_type scale_adc5_fn[] = {
 	[SCALE_HW_CALIB_DEFAULT] = {qcom_vadc_scale_hw_calib_volt},
 	[SCALE_HW_CALIB_THERM_100K_PULLUP] = {qcom_vadc_scale_hw_calib_therm},
 	[SCALE_HW_CALIB_XOTHERM] = {qcom_vadc_scale_hw_calib_therm},
+	[SCALE_HW_CALIB_THERM_100K_PU_PM7] = {
+					qcom_vadc7_scale_hw_calib_therm},
 	[SCALE_HW_CALIB_PMIC_THERM] = {qcom_vadc_scale_hw_calib_die_temp},
+	[SCALE_HW_CALIB_PMIC_THERM_PM7] = {
+					qcom_vadc7_scale_hw_calib_die_temp},
 	[SCALE_HW_CALIB_PM5_CHG_TEMP] = {qcom_vadc_scale_hw_chg5_temp},
 	[SCALE_HW_CALIB_PM5_SMB_TEMP] = {qcom_vadc_scale_hw_smb_temp},
 };
@@ -291,6 +492,32 @@ static int qcom_vadc_scale_code_voltage_factor(u16 adc_code,
 	return (int) voltage;
 }
 
+static int qcom_vadc7_scale_hw_calib_therm(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+	s64 resistance = adc_code;
+	int ret, result;
+
+	if (adc_code >= RATIO_MAX_ADC7)
+		return -EINVAL;
+
+	/* (ADC code * R_PULLUP (100Kohm)) / (full_scale_code - ADC code)*/
+	resistance *= R_PU_100K;
+	resistance = div64_s64(resistance, RATIO_MAX_ADC7 - adc_code);
+
+	ret = qcom_vadc_map_voltage_temp(adcmap7_100k,
+				 ARRAY_SIZE(adcmap7_100k),
+				 resistance, &result);
+	if (ret)
+		return ret;
+
+	*result_mdec = result;
+
+	return 0;
+}
+
 static int qcom_vadc_scale_hw_calib_volt(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -330,6 +557,39 @@ static int qcom_vadc_scale_hw_calib_die_temp(
 	return 0;
 }
 
+static int qcom_vadc7_scale_hw_calib_die_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+
+	int voltage, vtemp0, temp, i = ARRAY_SIZE(adcmap7_die_temp) - 1;
+
+	voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
+				prescale, data, 1);
+
+	if (adcmap7_die_temp[0].x > voltage) {
+		*result_mdec = DIE_TEMP_ADC7_SCALE_1;
+		return 0;
+	} else if (adcmap7_die_temp[i].x <= voltage) {
+		*result_mdec = DIE_TEMP_ADC7_MAX;
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(adcmap7_die_temp); i++)
+		if (adcmap7_die_temp[i].x > voltage)
+			break;
+
+	vtemp0 = adcmap7_die_temp[i - 1].x;
+	voltage = voltage - vtemp0;
+	temp = div64_s64(voltage * DIE_TEMP_ADC7_SCALE_FACTOR,
+		adcmap7_die_temp[i - 1].y);
+	temp += DIE_TEMP_ADC7_SCALE_1 + (DIE_TEMP_ADC7_SCALE_2 * (i - 1));
+	*result_mdec = temp;
+
+	return 0;
+}
+
 static int qcom_vadc_scale_hw_smb_temp(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index e074902a..5f9e680 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -49,6 +49,14 @@
 #define ADC5_FULL_SCALE_CODE			0x70e4
 #define ADC5_USR_DATA_CHECK			0x8000
 
+#define R_PU_100K			100000
+#define RATIO_MAX_ADC7		0x4000
+
+#define DIE_TEMP_ADC7_SCALE_1				-60000
+#define DIE_TEMP_ADC7_SCALE_2				20000
+#define DIE_TEMP_ADC7_SCALE_FACTOR			1000
+#define DIE_TEMP_ADC7_MAX				160000
+
 /**
  * struct vadc_map_pt - Map the graph representation for ADC channel
  * @x: Represent the ADC digitized code.
@@ -110,8 +118,12 @@ struct vadc_prescale_ratio {
  *	lookup table. The hardware applies offset/slope to adc code.
  * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using
  *	100k pullup. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_THERM_100K_PU_PM7: Returns temperature in millidegC using
+ *	lookup table for PMIC7. The hardware applies offset/slope to adc code.
  * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
  *	The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
+ *	The hardware applies offset/slope to adc code. This is for PMIC7.
  * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5
  *	charger temperature.
  * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5
@@ -126,7 +138,9 @@ enum vadc_scale_fn_type {
 	SCALE_HW_CALIB_DEFAULT,
 	SCALE_HW_CALIB_THERM_100K_PULLUP,
 	SCALE_HW_CALIB_XOTHERM,
+	SCALE_HW_CALIB_THERM_100K_PU_PM7,
 	SCALE_HW_CALIB_PMIC_THERM,
+	SCALE_HW_CALIB_PMIC_THERM_PM7,
 	SCALE_HW_CALIB_PM5_CHG_TEMP,
 	SCALE_HW_CALIB_PM5_SMB_TEMP,
 	SCALE_HW_CALIB_INVALID,
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH V4 4/5] iio: adc: Update error checks and debug prints
  2020-05-13  9:22 [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC Jishnu Prakash
                   ` (2 preceding siblings ...)
  2020-05-13  9:22 ` [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC Jishnu Prakash
@ 2020-05-13  9:22 ` Jishnu Prakash
  2020-05-13  9:49   ` Andy Shevchenko
  2020-05-13  9:22 ` [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7 Jishnu Prakash
  4 siblings, 1 reply; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-13  9:22 UTC (permalink / raw)
  To: agross, bjorn.andersson, devicetree, linux-kernel, mka,
	linus.walleij, Jonathan.Cameron, andy.shevchenko, amit.kucheria,
	smohanad, kgunda, aghayal, Jonathan Cameron, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler, linux-arm-msm,
	linux-iio
  Cc: linux-arm-msm-owner, Jishnu Prakash

Change pr_err/pr_debug statements to dev_err/dev_dbg for
increased clarity. Also clean up some return value checks.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
---
 drivers/iio/adc/qcom-spmi-adc5.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 6d6b611..974073f 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -249,11 +249,11 @@ static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data)
 	*data = (rslt_msb << 8) | rslt_lsb;
 
 	if (*data == ADC5_USR_DATA_CHECK) {
-		pr_err("Invalid data:0x%x\n", *data);
+		dev_err(adc->dev, "Invalid data:0x%x\n", *data);
 		return -EINVAL;
 	}
 
-	pr_debug("voltage raw code:0x%x\n", *data);
+	dev_dbg(adc->dev, "voltage raw code:0x%x\n", *data);
 
 	return 0;
 }
@@ -304,7 +304,7 @@ static int adc5_configure(struct adc5_chip *adc,
 
 	/* Read registers 0x42 through 0x46 */
 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
-	if (ret < 0)
+	if (ret)
 		return ret;
 
 	/* Digital param selection */
@@ -344,7 +344,7 @@ static int adc7_configure(struct adc5_chip *adc,
 		return ret;
 
 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
-	if (ret < 0)
+	if (ret)
 		return ret;
 
 	/* Digital param selection */
@@ -385,24 +385,24 @@ static int adc5_do_conversion(struct adc5_chip *adc,
 
 	ret = adc5_configure(adc, prop);
 	if (ret) {
-		pr_err("ADC configure failed with %d\n", ret);
+		dev_err(adc->dev, "ADC configure failed with %d\n", ret);
 		goto unlock;
 	}
 
 	if (adc->poll_eoc) {
 		ret = adc5_poll_wait_eoc(adc);
 		if (ret < 0) {
-			pr_err("EOC bit not set\n");
+			dev_err(adc->dev, "EOC bit not set\n");
 			goto unlock;
 		}
 	} else {
 		ret = wait_for_completion_timeout(&adc->complete,
 							ADC5_CONV_TIMEOUT);
 		if (!ret) {
-			pr_debug("Did not get completion timeout.\n");
+			dev_dbg(adc->dev, "Did not get completion timeout.\n");
 			ret = adc5_poll_wait_eoc(adc);
 			if (ret < 0) {
-				pr_err("EOC bit not set\n");
+				dev_err(adc->dev, "EOC bit not set\n");
 				goto unlock;
 			}
 		}
@@ -435,7 +435,7 @@ static int adc7_do_conversion(struct adc5_chip *adc,
 	wait_for_completion_timeout(&adc->complete, ADC7_CONV_TIMEOUT);
 
 	ret = adc5_read(adc, ADC5_USR_STATUS1, &status, 1);
-	if (ret < 0)
+	if (ret)
 		goto unlock;
 
 	if (status & ADC5_USR_STATUS1_CONV_FAULT) {
@@ -481,8 +481,8 @@ static int adc7_of_xlate(struct iio_dev *indio_dev,
 	int i, v_channel;
 
 	for (i = 0; i < adc->nchannels; i++) {
-		v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET |
-			adc->chan_props[i].channel);
+		v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET) |
+			adc->chan_props[i].channel;
 		if (v_channel == iiospec->args[0])
 			return i;
 	}
@@ -728,7 +728,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 	channel_name = of_get_property(node,
 				"label", NULL) ? : node->name;
 	if (!channel_name) {
-		pr_err("Invalid channel name\n");
+		dev_err(dev, "Invalid channel name\n");
 		return -EINVAL;
 	}
 	prop->datasheet_name = channel_name;
@@ -766,12 +766,12 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 		ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version,
 							sizeof(dig_version));
-		if (ret < 0) {
+		if (ret) {
 			dev_err(dev, "Invalid dig version read %d\n", ret);
 			return ret;
 		}
 
-		pr_debug("dig_ver:minor:%d, major:%d\n", dig_version[0],
+		dev_dbg(dev, "dig_ver:minor:%d, major:%d\n", dig_version[0],
 						dig_version[1]);
 		/* Digital controller >= 5.3 have hw_settle_2 option */
 		if ((dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
@@ -975,7 +975,7 @@ static int adc5_probe(struct platform_device *pdev)
 
 	ret = adc5_get_dt_data(adc, node);
 	if (ret) {
-		pr_err("adc get dt data failed\n");
+		dev_err(dev, "adc get dt data failed\n");
 		return ret;
 	}
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 14+ messages in thread

* [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7
  2020-05-13  9:22 [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC Jishnu Prakash
                   ` (3 preceding siblings ...)
  2020-05-13  9:22 ` [PATCH V4 4/5] iio: adc: Update error checks and debug prints Jishnu Prakash
@ 2020-05-13  9:22 ` Jishnu Prakash
  2020-05-13  9:51   ` Andy Shevchenko
  4 siblings, 1 reply; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-13  9:22 UTC (permalink / raw)
  To: agross, bjorn.andersson, devicetree, linux-kernel, mka,
	linus.walleij, Jonathan.Cameron, andy.shevchenko, amit.kucheria,
	smohanad, kgunda, aghayal, Jonathan Cameron, Hartmut Knaack,
	Lars-Peter Clausen, Peter Meerwald-Stadler, linux-arm-msm,
	linux-iio
  Cc: linux-arm-msm-owner, Jishnu Prakash

This commit includes the following changes:
Add a common function used for read_raw callback for
both PMIC5 and PMIC7 ADCs.
Add exit function for ADC.
Add info_property under adc_data to more efficiently
distinguish PMIC5 and PMIC7 ADCs.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
---
 drivers/iio/adc/qcom-spmi-adc5.c   | 83 +++++++++++++++++++++-----------------
 drivers/iio/adc/qcom-vadc-common.h |  1 +
 2 files changed, 48 insertions(+), 36 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 974073f..fbe7a39 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -167,8 +167,6 @@ static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
 	{.num =  1, .den = 16}
 };
 
-static const struct adc5_data adc7_data_pmic;
-
 static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)
 {
 	return regmap_bulk_read(adc->regmap, adc->base + offset, data, len);
@@ -452,6 +450,13 @@ static int adc7_do_conversion(struct adc5_chip *adc,
 	return ret;
 }
 
+struct adc_do_conversion {
+	int (*adc_do_conversion)(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur);
+};
+
 static irqreturn_t adc5_isr(int irq, void *dev_id)
 {
 	struct adc5_chip *adc = dev_id;
@@ -490,9 +495,9 @@ static int adc7_of_xlate(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
-static int adc5_read_raw(struct iio_dev *indio_dev,
+static int adc_read_raw_common(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
-			 long mask)
+			 long mask, struct adc_do_conversion do_conv)
 {
 	struct adc5_chip *adc = iio_priv(indio_dev);
 	struct adc5_channel_prop *prop;
@@ -503,8 +508,9 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc5_do_conversion(adc, prop, chan,
-				&adc_code_volt, &adc_code_cur);
+		ret = do_conv.adc_do_conversion(adc, prop, chan,
+					&adc_code_volt, &adc_code_cur);
+
 		if (ret)
 			return ret;
 
@@ -512,6 +518,7 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 			&adc5_prescale_ratios[prop->prescale],
 			adc->data,
 			adc_code_volt, val);
+
 		if (ret)
 			return ret;
 
@@ -523,38 +530,28 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static int adc7_read_raw(struct iio_dev *indio_dev,
+static int adc5_read_raw(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
 			 long mask)
 {
-	struct adc5_chip *adc = iio_priv(indio_dev);
-	struct adc5_channel_prop *prop;
-	u16 adc_code_volt, adc_code_cur;
-	int ret;
-
-	prop = &adc->chan_props[chan->address];
+	struct adc_do_conversion do_conv;
 
-	switch (mask) {
-	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc7_do_conversion(adc, prop, chan,
-					&adc_code_volt, &adc_code_cur);
-		if (ret)
-			return ret;
+	do_conv.adc_do_conversion = adc5_do_conversion;
 
-		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
-			&adc5_prescale_ratios[prop->prescale],
-			adc->data,
-			adc_code_volt, val);
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, do_conv);
+}
 
-		if (ret)
-			return ret;
+static int adc7_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	struct adc_do_conversion do_conv;
 
-		return IIO_VAL_INT;
-	default:
-		return -EINVAL;
-	}
+	do_conv.adc_do_conversion = adc7_do_conversion;
 
-	return 0;
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, do_conv);
 }
 
 static const struct iio_info adc5_info = {
@@ -710,7 +707,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 	/* virtual channel number = sid << 8 | channel number */
 
-	if (adc->data == &adc7_data_pmic) {
+	if (adc->data->info == &adc7_info) {
 		sid = chan >> ADC_CHANNEL_OFFSET;
 		chan = chan & ADC_CHANNEL_MASK;
 	}
@@ -776,7 +773,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 		/* Digital controller >= 5.3 have hw_settle_2 option */
 		if ((dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
 			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR) ||
-			adc->data == &adc7_data_pmic)
+			adc->data->info == &adc7_info)
 			ret = adc5_hw_settle_time_from_dt(value,
 							data->hw_settle_2);
 		else
@@ -826,6 +823,7 @@ static const struct adc5_data adc5_data_pmic = {
 	.full_scale_code_volt = 0x70e4,
 	.full_scale_code_cur = 0x2710,
 	.adc_chans = adc5_chans_pmic,
+	.info = &adc5_info,
 	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 				{250, 420, 840},
 	.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -839,6 +837,7 @@ static const struct adc5_data adc5_data_pmic = {
 static const struct adc5_data adc7_data_pmic = {
 	.full_scale_code_volt = 0x70e4,
 	.adc_chans = adc7_chans_pmic,
+	.info = &adc7_info,
 	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 				{85, 340, 1360},
 	.hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -851,6 +850,7 @@ static const struct adc5_data adc5_data_pmic_rev2 = {
 	.full_scale_code_volt = 0x4000,
 	.full_scale_code_cur = 0x1800,
 	.adc_chans = adc5_chans_rev2,
+	.info = &adc5_info,
 	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 				{256, 512, 1024},
 	.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -965,10 +965,7 @@ static int adc5_probe(struct platform_device *pdev)
 	adc->dev = dev;
 	adc->base = reg;
 
-	if (of_device_is_compatible(node, "qcom,spmi-adc7"))
-		indio_dev->info = &adc7_info;
-	else
-		indio_dev->info = &adc5_info;
+	platform_set_drvdata(pdev, adc);
 
 	init_completion(&adc->complete);
 	mutex_init(&adc->lock);
@@ -979,6 +976,8 @@ static int adc5_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	indio_dev->info = adc->data->info;
+
 	irq_eoc = platform_get_irq(pdev, 0);
 	if (irq_eoc < 0) {
 		if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
@@ -991,6 +990,8 @@ static int adc5_probe(struct platform_device *pdev)
 			return ret;
 	}
 
+	adc->irq_eoc = irq_eoc;
+
 	indio_dev->dev.parent = dev;
 	indio_dev->dev.of_node = node;
 	indio_dev->name = pdev->name;
@@ -1001,12 +1002,22 @@ static int adc5_probe(struct platform_device *pdev)
 	return devm_iio_device_register(dev, indio_dev);
 }
 
+static int adc5_exit(struct platform_device *pdev)
+{
+	struct adc5_chip *adc = platform_get_drvdata(pdev);
+
+	if (adc->irq_eoc >= 0)
+		disable_irq(adc->irq_eoc);
+	return 0;
+}
+
 static struct platform_driver adc5_driver = {
 	.driver = {
 		.name = "qcom-spmi-adc5.c",
 		.of_match_table = adc5_match_table,
 	},
 	.probe = adc5_probe,
+	.remove = adc5_exit,
 };
 module_platform_driver(adc5_driver);
 
diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index 5f9e680..d195e83 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -150,6 +150,7 @@ struct adc5_data {
 	const u32	full_scale_code_volt;
 	const u32	full_scale_code_cur;
 	const struct adc5_channels *adc_chans;
+	const struct iio_info *info;
 	unsigned int	*decimation;
 	unsigned int	*hw_settle_1;
 	unsigned int	*hw_settle_2;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC
  2020-05-13  9:22 ` [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC Jishnu Prakash
@ 2020-05-13  9:48   ` Andy Shevchenko
  2020-05-22 11:58     ` Jishnu Prakash
  0 siblings, 1 reply; 14+ messages in thread
From: Andy Shevchenko @ 2020-05-13  9:48 UTC (permalink / raw)
  To: Jishnu Prakash
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

On Wed, May 13, 2020 at 12:23 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
>
> The ADC architecture on PMIC7 is changed as compared to PMIC5. The
> major change from PMIC5 is that all SW communication to ADC goes through
> PMK8350, which communicates with other PMICs through PBS when the ADC
> on PMK8350 works in master mode. The SID register is used to identify the
> PMICs with which the PBS needs to communicate. Add support for the same.

> +#define ADC7_CONV_TIMEOUT                      msecs_to_jiffies(10)

...

> +       ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
> +       if (ret < 0)

Is ' < 0' part necessary?
Ditto for same cases in other places in the code.

> +               return ret;

...

> +       switch (mask) {
> +       case IIO_CHAN_INFO_PROCESSED:
> +               ret = adc7_do_conversion(adc, prop, chan,
> +                                       &adc_code_volt, &adc_code_cur);
> +               if (ret)
> +                       return ret;
> +
> +               ret = qcom_adc5_hw_scale(prop->scale_fn_type,
> +                       &adc5_prescale_ratios[prop->prescale],
> +                       adc->data,
> +                       adc_code_volt, val);
> +
> +               if (ret)
> +                       return ret;
> +
> +               return IIO_VAL_INT;
> +       default:
> +               return -EINVAL;
> +       }

> +
> +       return 0;

Dead code?

...

> +static int qcom_vadc7_scale_hw_calib_die_temp(
> +                               const struct vadc_prescale_ratio *prescale,
> +                               const struct adc5_data *data,
> +                               u16 adc_code, int *result_mdec)
> +{
> +
> +       int voltage, vtemp0, temp, i = ARRAY_SIZE(adcmap7_die_temp) - 1;

How assignment to i is useful?

> +       voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
> +                               prescale, data, 1);
> +
> +       if (adcmap7_die_temp[0].x > voltage) {
> +               *result_mdec = DIE_TEMP_ADC7_SCALE_1;
> +               return 0;

> +       } else if (adcmap7_die_temp[i].x <= voltage) {

Redundant 'else'.

> +               *result_mdec = DIE_TEMP_ADC7_MAX;
> +               return 0;
> +       }
> +
> +       for (i = 0; i < ARRAY_SIZE(adcmap7_die_temp); i++)
> +               if (adcmap7_die_temp[i].x > voltage)
> +                       break;
> +
> +       vtemp0 = adcmap7_die_temp[i - 1].x;
> +       voltage = voltage - vtemp0;
> +       temp = div64_s64(voltage * DIE_TEMP_ADC7_SCALE_FACTOR,
> +               adcmap7_die_temp[i - 1].y);
> +       temp += DIE_TEMP_ADC7_SCALE_1 + (DIE_TEMP_ADC7_SCALE_2 * (i - 1));
> +       *result_mdec = temp;
> +
> +       return 0;
> +}

...

> +#define RATIO_MAX_ADC7         0x4000

Hmm... Why the last is in hex? Is it related to amount of bits in the
hardware? Then probably better to use BIT().

-- 
With Best Regards,
Andy Shevchenko

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 4/5] iio: adc: Update error checks and debug prints
  2020-05-13  9:22 ` [PATCH V4 4/5] iio: adc: Update error checks and debug prints Jishnu Prakash
@ 2020-05-13  9:49   ` Andy Shevchenko
  2020-05-22 11:58     ` Jishnu Prakash
  0 siblings, 1 reply; 14+ messages in thread
From: Andy Shevchenko @ 2020-05-13  9:49 UTC (permalink / raw)
  To: Jishnu Prakash
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

On Wed, May 13, 2020 at 12:23 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
>
> Change pr_err/pr_debug statements to dev_err/dev_dbg for
> increased clarity. Also clean up some return value checks.

'Also' on the commit message == 'split this to two'.
But here is a ping pong style of patches (you introduce a problem in
one patch and fix it in the following).

-- 
With Best Regards,
Andy Shevchenko

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7
  2020-05-13  9:22 ` [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7 Jishnu Prakash
@ 2020-05-13  9:51   ` Andy Shevchenko
  2020-05-22 11:59     ` Jishnu Prakash
  0 siblings, 1 reply; 14+ messages in thread
From: Andy Shevchenko @ 2020-05-13  9:51 UTC (permalink / raw)
  To: Jishnu Prakash
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

On Wed, May 13, 2020 at 12:24 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
>
> This commit includes the following changes:
> Add a common function used for read_raw callback for
> both PMIC5 and PMIC7 ADCs.
> Add exit function for ADC.
> Add info_property under adc_data to more efficiently
> distinguish PMIC5 and PMIC7 ADCs.

Something happened to the editor settings. We have lines up to 72
(recommended) characters.

...

> @@ -512,6 +518,7 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
>                         &adc5_prescale_ratios[prop->prescale],
>                         adc->data,
>                         adc_code_volt, val);
> +
>                 if (ret)
>                         return ret;
>

Unrelated.

-- 
With Best Regards,
Andy Shevchenko

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format
  2020-05-13  9:22 ` [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format Jishnu Prakash
@ 2020-05-18  7:25   ` Linus Walleij
  0 siblings, 0 replies; 14+ messages in thread
From: Linus Walleij @ 2020-05-18  7:25 UTC (permalink / raw)
  To: Jishnu Prakash
  Cc: Andy Gross, Bjorn Andersson,
	open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
	linux-kernel, Matthias Kaehlcke, Jonathan Cameron,
	Andy Shevchenko, Amit Kucheria, smohanad, Kiran Gunda, aghayal,
	Jonathan Cameron, Hartmut Knaack, Lars-Peter Clausen,
	Peter Meerwald-Stadler, Rob Herring, Mark Rutland, Amit Kucheria,
	linux-iio, MSM, linux-arm-msm-owner

On Wed, May 13, 2020 at 11:22 AM Jishnu Prakash <jprakash@codeaurora.org> wrote:

> Convert the adc bindings from .txt to .yaml format.
>
> Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
> Reviewed-by: Rob Herring <robh@kernel.org>

Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC
  2020-05-13  9:48   ` Andy Shevchenko
@ 2020-05-22 11:58     ` Jishnu Prakash
  2020-05-22 15:31       ` Andy Shevchenko
  0 siblings, 1 reply; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-22 11:58 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

Hi Andy,

On 5/13/2020 3:18 PM, Andy Shevchenko wrote:
> On Wed, May 13, 2020 at 12:23 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
>> The ADC architecture on PMIC7 is changed as compared to PMIC5. The
>> major change from PMIC5 is that all SW communication to ADC goes through
>> PMK8350, which communicates with other PMICs through PBS when the ADC
>> on PMK8350 works in master mode. The SID register is used to identify the
>> PMICs with which the PBS needs to communicate. Add support for the same.
>> +#define ADC7_CONV_TIMEOUT                      msecs_to_jiffies(10)
> ...
>
>> +       ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
>> +       if (ret < 0)
> Is ' < 0' part necessary?
> Ditto for same cases in other places in the code.
I'll fix this at all required locations in this patch in the next post.
>
>> +               return ret;
> ...
>
>> +       switch (mask) {
>> +       case IIO_CHAN_INFO_PROCESSED:
>> +               ret = adc7_do_conversion(adc, prop, chan,
>> +                                       &adc_code_volt, &adc_code_cur);
>> +               if (ret)
>> +                       return ret;
>> +
>> +               ret = qcom_adc5_hw_scale(prop->scale_fn_type,
>> +                       &adc5_prescale_ratios[prop->prescale],
>> +                       adc->data,
>> +                       adc_code_volt, val);
>> +
>> +               if (ret)
>> +                       return ret;
>> +
>> +               return IIO_VAL_INT;
>> +       default:
>> +               return -EINVAL;
>> +       }
>> +
>> +       return 0;
> Dead code?
Right, I'll remove it in the next post.
>
> ...
>
>> +static int qcom_vadc7_scale_hw_calib_die_temp(
>> +                               const struct vadc_prescale_ratio *prescale,
>> +                               const struct adc5_data *data,
>> +                               u16 adc_code, int *result_mdec)
>> +{
>> +
>> +       int voltage, vtemp0, temp, i = ARRAY_SIZE(adcmap7_die_temp) - 1;
> How assignment to i is useful?


I'm using it in adcmap7_die_temp[i] below, to keep it within the 
character limit per line. I think it's more readable that way.

>
>> +       voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
>> +                               prescale, data, 1);
>> +
>> +       if (adcmap7_die_temp[0].x > voltage) {
>> +               *result_mdec = DIE_TEMP_ADC7_SCALE_1;
>> +               return 0;
>> +       } else if (adcmap7_die_temp[i].x <= voltage) {
> Redundant 'else'.
The expression is different, it's adcmap7_die_temp[i] here, not 
adcmap7_die_temp[0].

>
>> +               *result_mdec = DIE_TEMP_ADC7_MAX;
>> +               return 0;
>> +       }
>> +
>> +       for (i = 0; i < ARRAY_SIZE(adcmap7_die_temp); i++)
>> +               if (adcmap7_die_temp[i].x > voltage)
>> +                       break;
>> +
>> +       vtemp0 = adcmap7_die_temp[i - 1].x;
>> +       voltage = voltage - vtemp0;
>> +       temp = div64_s64(voltage * DIE_TEMP_ADC7_SCALE_FACTOR,
>> +               adcmap7_die_temp[i - 1].y);
>> +       temp += DIE_TEMP_ADC7_SCALE_1 + (DIE_TEMP_ADC7_SCALE_2 * (i - 1));
>> +       *result_mdec = temp;
>> +
>> +       return 0;
>> +}
> ...
>
>> +#define RATIO_MAX_ADC7         0x4000
> Hmm... Why the last is in hex? Is it related to amount of bits in the
> hardware? Then probably better to use BIT().
It is the upper limit reading for a ratiometric calibration measurement, 
which is reported as a 14 bit reading. I'll change this in the next post.
>

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 4/5] iio: adc: Update error checks and debug prints
  2020-05-13  9:49   ` Andy Shevchenko
@ 2020-05-22 11:58     ` Jishnu Prakash
  0 siblings, 0 replies; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-22 11:58 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

Hi Andy,

On 5/13/2020 3:19 PM, Andy Shevchenko wrote:
> On Wed, May 13, 2020 at 12:23 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
>> Change pr_err/pr_debug statements to dev_err/dev_dbg for
>> increased clarity. Also clean up some return value checks.
> 'Also' on the commit message == 'split this to two'.
I'll do the ret value changes in the third patch in my next post, 
according to your comment there.
> But here is a ping pong style of patches (you introduce a problem in
> one patch and fix it in the following).
I'll try to avoid this in the next post
>

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7
  2020-05-13  9:51   ` Andy Shevchenko
@ 2020-05-22 11:59     ` Jishnu Prakash
  0 siblings, 0 replies; 14+ messages in thread
From: Jishnu Prakash @ 2020-05-22 11:59 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

Hi Andy,

On 5/13/2020 3:21 PM, Andy Shevchenko wrote:
> On Wed, May 13, 2020 at 12:24 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
>> This commit includes the following changes:
>> Add a common function used for read_raw callback for
>> both PMIC5 and PMIC7 ADCs.
>> Add exit function for ADC.
>> Add info_property under adc_data to more efficiently
>> distinguish PMIC5 and PMIC7 ADCs.
> Something happened to the editor settings. We have lines up to 72
> (recommended) characters.
In this case, I just meant to put each change on a different line. I'll 
fix it in the next post.
>
> ...
>
>> @@ -512,6 +518,7 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
>>                          &adc5_prescale_ratios[prop->prescale],
>>                          adc->data,
>>                          adc_code_volt, val);
>> +
>>                  if (ret)
>>                          return ret;
>>
> Unrelated.
I'll remove it in the next post.
>

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC
  2020-05-22 11:58     ` Jishnu Prakash
@ 2020-05-22 15:31       ` Andy Shevchenko
  0 siblings, 0 replies; 14+ messages in thread
From: Andy Shevchenko @ 2020-05-22 15:31 UTC (permalink / raw)
  To: Jishnu Prakash
  Cc: agross, Bjorn Andersson, devicetree, Linux Kernel Mailing List,
	Matthias Kaehlcke, Linus Walleij, Jonathan Cameron,
	Amit Kucheria, smohanad, kgunda, aghayal, Jonathan Cameron,
	Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-arm-msm, linux-iio, linux-arm-msm-owner

On Fri, May 22, 2020 at 2:58 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:
> On 5/13/2020 3:18 PM, Andy Shevchenko wrote:
> > On Wed, May 13, 2020 at 12:23 PM Jishnu Prakash <jprakash@codeaurora.org> wrote:

...

> >> +static int qcom_vadc7_scale_hw_calib_die_temp(
> >> +                               const struct vadc_prescale_ratio *prescale,
> >> +                               const struct adc5_data *data,
> >> +                               u16 adc_code, int *result_mdec)
> >> +{
> >> +
> >> +       int voltage, vtemp0, temp, i = ARRAY_SIZE(adcmap7_die_temp) - 1;
> > How assignment to i is useful?
>
>
> I'm using it in adcmap7_die_temp[i] below, to keep it within the
> character limit per line. I think it's more readable that way.
>
> >
> >> +       voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
> >> +                               prescale, data, 1);
> >> +
> >> +       if (adcmap7_die_temp[0].x > voltage) {
> >> +               *result_mdec = DIE_TEMP_ADC7_SCALE_1;
> >> +               return 0;
> >> +       } else if (adcmap7_die_temp[i].x <= voltage) {

I see now i in use, please, replace with direct meaning.

> > Redundant 'else'.
> The expression is different, it's adcmap7_die_temp[i] here, not
> adcmap7_die_temp[0].

if (a) {
 ...
 return;
} else if (b) {
 ...
}

'else' is redundant due to 'return'. Same when it's 'goto'.

> >> +               *result_mdec = DIE_TEMP_ADC7_MAX;
> >> +               return 0;
> >> +       }
> >> +
> >> +       for (i = 0; i < ARRAY_SIZE(adcmap7_die_temp); i++)
> >> +               if (adcmap7_die_temp[i].x > voltage)
> >> +                       break;
> >> +
> >> +       vtemp0 = adcmap7_die_temp[i - 1].x;
> >> +       voltage = voltage - vtemp0;
> >> +       temp = div64_s64(voltage * DIE_TEMP_ADC7_SCALE_FACTOR,
> >> +               adcmap7_die_temp[i - 1].y);
> >> +       temp += DIE_TEMP_ADC7_SCALE_1 + (DIE_TEMP_ADC7_SCALE_2 * (i - 1));
> >> +       *result_mdec = temp;
> >> +
> >> +       return 0;
> >> +}

-- 
With Best Regards,
Andy Shevchenko

^ permalink raw reply	[flat|nested] 14+ messages in thread

end of thread, back to index

Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-13  9:22 [PATCH V4 0/5] iio: adc: Add support for QCOM SPMI PMIC7 ADC Jishnu Prakash
2020-05-13  9:22 ` [PATCH V4 1/5] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format Jishnu Prakash
2020-05-18  7:25   ` Linus Walleij
2020-05-13  9:22 ` [PATCH V4 2/5] iio: adc: Add PMIC7 ADC bindings Jishnu Prakash
2020-05-13  9:22 ` [PATCH V4 3/5] iio: adc: Add support for PMIC7 ADC Jishnu Prakash
2020-05-13  9:48   ` Andy Shevchenko
2020-05-22 11:58     ` Jishnu Prakash
2020-05-22 15:31       ` Andy Shevchenko
2020-05-13  9:22 ` [PATCH V4 4/5] iio: adc: Update error checks and debug prints Jishnu Prakash
2020-05-13  9:49   ` Andy Shevchenko
2020-05-22 11:58     ` Jishnu Prakash
2020-05-13  9:22 ` [PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7 Jishnu Prakash
2020-05-13  9:51   ` Andy Shevchenko
2020-05-22 11:59     ` Jishnu Prakash

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