Re: [PATCH V4 1/2] mfd: qcom-spmi-pmic: Convert bindings to .yaml format

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On 2020-12-20 05:17, Stephen Boyd wrote:
Quoting Kiran Gunda (2020-12-18 00:14:51)
Convert the bindings from .txt to .yaml format.

Signed-off-by: Kiran Gunda <kgunda@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/mfd/qcom,spmi-pmic.txt | 80 ------------- .../devicetree/bindings/mfd/qcom,spmi-pmic.yaml | 127 +++++++++++++++++++++
 2 files changed, 127 insertions(+), 80 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt create mode 100644 Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml

diff --git a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
deleted file mode 100644
index 79367a4..0000000
--- a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt
+++ /dev/null
@@ -1,80 +0,0 @@
-          Qualcomm SPMI PMICs multi-function device bindings
-
-The Qualcomm SPMI series presently includes PM8941, PM8841 and PMA8084
-PMICs.  These PMICs use a QPNP scheme through SPMI interface.
-QPNP is effectively a partitioning scheme for dividing the SPMI extended
-register space up into logical pieces, and set of fixed register
-locations/definitions within these regions, with some of these regions
-specifically used for interrupt handling.
-
-The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are -interfaced to the chip via the SPMI (System Power Management Interface) bus. -Support for multiple independent functions are implemented by splitting the -16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes -each. A function can consume one or more of these fixed-size register regions.
-
-Required properties:
-- compatible:      Should contain one of:
-                   "qcom,pm8941",
-                   "qcom,pm8841",
-                   "qcom,pma8084",
-                   "qcom,pm8019",
-                   "qcom,pm8226",
-                   "qcom,pm8110",
-                   "qcom,pma8084",
-                   "qcom,pmi8962",
-                   "qcom,pmd9635",
-                   "qcom,pm8994",
-                   "qcom,pmi8994",
-                   "qcom,pm8916",
-                   "qcom,pm8004",
-                   "qcom,pm8909",
-                   "qcom,pm8950",
-                   "qcom,pmi8950",
-                   "qcom,pm8998",
-                   "qcom,pmi8998",
-                   "qcom,pm8005",
-                   or generalized "qcom,spmi-pmic".
-- reg: Specifies the SPMI USID slave address for this device.
-                   For more information see:
-                   Documentation/devicetree/bindings/spmi/spmi.yaml
-
-Required properties for peripheral child nodes:
-- compatible: Should contain "qcom,xxx", where "xxx" is a peripheral name.
-
-Optional properties for peripheral child nodes:
-- interrupts: Interrupts are specified as a 4-tuple. For more information
-                   see:
- Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt -- interrupt-names: Corresponding interrupt name to the interrupts property
-
-Each child node of SPMI slave id represents a function of the PMIC. In the
-example below the rtc device node represents a peripheral of pm8941
-SID = 0. The regulator device node represents a peripheral of pm8941 SID = 1.
-
-Example:
-
-       spmi {
-               compatible = "qcom,spmi-pmic-arb";
-
-               pm8941@0 {
-                       compatible = "qcom,pm8941", "qcom,spmi-pmic";
-                       reg = <0x0 SPMI_USID>;
-
-                       rtc {
-                               compatible = "qcom,rtc";
- interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
-                               interrupt-names = "alarm";
-                       };
-               };
-
-               pm8941@1 {
-                       compatible = "qcom,pm8941", "qcom,spmi-pmic";
-                       reg = <0x1 SPMI_USID>;
-
-                       regulator {
-                               compatible = "qcom,regulator";
-                               regulator-name = "8941_boost";
-                       };
-               };
-       };
diff --git a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
new file mode 100644
index 0000000..e458dd1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
@@ -0,0 +1,127 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/qcom,spmi-pmic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SPMI PMICs multi-function device bindings
+
+maintainers:
+  - Stephen Boyd <sboyd@xxxxxxxxxx>

Someone at Qualcomm should be the maintainer here. Maybe you?

+
+description: |
+  The Qualcomm SPMI PMICs use a QPNP scheme through SPMI interface.

What is QPNP?

Qualcomm Plug And Play.
+ QPNP is effectively a partitioning scheme for dividing the SPMI extended
+  register space up into logical pieces, and set of fixed register
+ locations/definitions within these regions, with some of these regions
+  specifically used for interrupt handling.
+
+ The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are + interfaced to the chip via the SPMI (System Power Management Interface) bus. + Support for multiple independent functions are implemented by splitting the + 16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes + each. A function can consume one or more of these fixed-size register regions.
+
+properties:
+  spmi_bus:
+    type: object
+    description: SPMI bus node
+
+patternProperties:
+  "^pmic@[0-9]$":
+    description: Child PMIC nodes
+    type: object
+
+    properties:
+      compatible:
+        items:
+          - enum:
+              # Sorted based on subtype ID the device reports
+              - qcom,pm8941
+              - qcom,pm8841
+              - qcom,pma8084
+              - qcom,pm8019
+              - qcom,pm8226
+              - qcom,pm8110
+              - qcom,pma8084
+              - qcom,pmi8962
+              - qcom,pmd9635
+              - qcom,pm8994
+              - qcom,pmi8994
+              - qcom,pm8916
+              - qcom,pm8004
+              - qcom,pm8909
+              - qcom,pm8950
+              - qcom,pmi8950
+              - qcom,pm8998
+              - qcom,pmi8998
+              - qcom,pm8005
+              - qcom,pm660l
+              - qcom,pm660
+
+          - enum:
+              - qcom,spmi-pmic
+
+      reg:
+        maxItems: 1
+        description:
+          Specifies the SPMI USID slave address for this device.
+          For more information see bindings/spmi/spmi.txt
+
+    patternProperties:
+      "@[0-9a-f]$":

Is that @ sign supposed to be a ^ sign? I thought the child nodes of a
pmic node were [a-zA-Z0-9-] or some sort of regex like that. Certainly
not an address that doesn't exist. They look to be things like 'rtc' or
'regulator'.

Will fix it in next series.
+        description:
+ Each child node of SPMI slave id represents a function of the PMIC. + In the example below the rtc device node represents a peripheral of + pm8941 SID = 0. The regulator device node represents a peripheral of
+          pm8941 SID = 1.
+        type: object
+
+        properties:
+          interrupts:
+            maxItems: 4
+            description:
+ Interrupts are specified as a 4-tuple. For more information

Seems like minItems is also 4 though, so should be a const 4 instead?
But then this is about how many interrupts there are, which would be 1
or 2?  It really can't be known in case there are many interrupts for a
child node so not sure we need to specify anything.

+              see bindings/spmi/qcom,spmi-pmic-arb.txt
+
+          interrupt-names:
+            description:
+              Corresponding interrupt name to the interrupts property

I suspect we should drop these two properties and leave them up to the
binding for the function, like rtc, or regualator, etc.

Okay. I will remove these properties.
+
+    required:
+      - compatible
+      - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+
+    spmi_bus {
+        compatible = "qcom,spmi-pmic-arb";
+        #address-cells = <2>;
+        #size-cells = <0>;
+
+        pmic@0 {
+         compatible = "qcom,pm8941";
+         reg = <0x0 SPMI_USID>;
+
+         rtc {
+           compatible = "qcom,rtc";
+           interrupts = <0x0 0x61 0x1 0x1>;
+           interrupt-names = "alarm";
+          };
+        };
+
+        pmic@1 {
+         compatible = "qcom,pm8941";
+         reg = <0x1 SPMI_USID>;
+
+         regulator {
+           compatible = "qcom,regulator";
+           regulator-name = "8941_boost";
+           };
+          };
+        };
+...



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