[PATCH 0/6] pinctrl: qcom: convert ssbi-mpp and spmi-mpp to hierarchical IRQ

[PATCH 0/6] pinctrl: qcom: convert ssbi-mpp and spmi-mpp to hierarchical IRQ

[Dmitry Baryshkov]

In 2019 (in kernel 5.4) spmi-gpio and ssbi-gpio drivers were converted
to hierarchical IRQ helpers, however MPP drivers were not converted at
that moment. Complete this by converting MPP drivers.

----------------------------------------------------------------
Dmitry Baryshkov (6):
      dt-bindings: pinctrl: qcom,pmic-mpp: Convert qcom pmic mpp bindings to YAML
      dt-bindings: pinctrl: qcom,pmic-mpp: switch to #interrupt-cells
      pinctrl: qcom: ssbi-mpp: hardcode IRQ counts
      pinctrl: qcom: ssbi-mpp: add support for hierarchical IRQ chip
      pinctrl: qcom: spmi-mpp: hardcode IRQ counts
      pinctrl: qcom: spmi-mpp: add support for hierarchical IRQ chip

 .../devicetree/bindings/pinctrl/qcom,pmic-mpp.txt  | 187 ---------------------
 .../devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml | 177 +++++++++++++++++++
 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c            | 111 ++++++++----
 drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c            | 133 +++++++++++----
 4 files changed, 357 insertions(+), 251 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt
 create mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml

[PATCH 1/6] dt-bindings: pinctrl: qcom,pmic-mpp: Convert qcom pmic mpp bindings to YAML

[Dmitry Baryshkov]

Convert Qualcomm PMIC MPP bindings from .txt to .yaml format.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 .../bindings/pinctrl/qcom,pmic-mpp.txt        | 187 ------------------
 .../bindings/pinctrl/qcom,pmic-mpp.yaml       | 178 +++++++++++++++++
 2 files changed, 178 insertions(+), 187 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt
 create mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt
deleted file mode 100644
index 5363d44cbb74..000000000000
--- a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt
+++ /dev/null
@@ -1,187 +0,0 @@
-Qualcomm PMIC Multi-Purpose Pin (MPP) block
-
-This binding describes the MPP block(s) found in the 8xxx series
-of PMIC's from Qualcomm.
-
-- compatible:
-	Usage: required
-	Value type: <string>
-	Definition: Should contain one of:
-		    "qcom,pm8018-mpp",
-		    "qcom,pm8019-mpp",
-		    "qcom,pm8038-mpp",
-		    "qcom,pm8058-mpp",
-		    "qcom,pm8821-mpp",
-		    "qcom,pm8841-mpp",
-		    "qcom,pm8916-mpp",
-		    "qcom,pm8917-mpp",
-		    "qcom,pm8921-mpp",
-		    "qcom,pm8941-mpp",
-		    "qcom,pm8950-mpp",
-		    "qcom,pmi8950-mpp",
-		    "qcom,pm8994-mpp",
-		    "qcom,pma8084-mpp",
-		    "qcom,pmi8994-mpp",
-
-		    And must contain either "qcom,spmi-mpp" or "qcom,ssbi-mpp"
-		    if the device is on an spmi bus or an ssbi bus respectively.
-
-- reg:
-	Usage: required
-	Value type: <prop-encoded-array>
-	Definition: Register base of the MPP block and length.
-
-- interrupts:
-	Usage: required
-	Value type: <prop-encoded-array>
-	Definition: Must contain an array of encoded interrupt specifiers for
-		    each available MPP
-
-- gpio-controller:
-	Usage: required
-	Value type: <none>
-	Definition: Mark the device node as a GPIO controller
-
-- #gpio-cells:
-	Usage: required
-	Value type: <u32>
-	Definition: Must be 2;
-		    the first cell will be used to define MPP number and the
-		    second denotes the flags for this MPP
-
-Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for
-a general description of GPIO and interrupt bindings.
-
-Please refer to pinctrl-bindings.txt in this directory for details of the
-common pinctrl bindings used by client devices, including the meaning of the
-phrase "pin configuration node".
-
-The pin configuration nodes act as a container for an arbitrary number of
-subnodes. Each of these subnodes represents some desired configuration for a
-pin or a list of pins. This configuration can include the
-mux function to select on those pin(s), and various pin configuration
-parameters, as listed below.
-
-SUBNODES:
-
-The name of each subnode is not important; all subnodes should be enumerated
-and processed purely based on their content.
-
-Each subnode only affects those parameters that are explicitly listed. In
-other words, a subnode that lists a mux function but no pin configuration
-parameters implies no information about any pin configuration parameters.
-Similarly, a pin subnode that describes a pullup parameter implies no
-information about e.g. the mux function.
-
-The following generic properties as defined in pinctrl-bindings.txt are valid
-to specify in a pin configuration subnode:
-
-- pins:
-	Usage: required
-	Value type: <string-array>
-	Definition: List of MPP pins affected by the properties specified in
-		    this subnode.  Valid pins are:
-		    mpp1-mpp4 for pm8841
-		    mpp1-mpp4 for pm8916
-		    mpp1-mpp8 for pm8941
-		    mpp1-mpp4 for pm8950
-		    mpp1-mpp4 for pmi8950
-		    mpp1-mpp4 for pma8084
-
-- function:
-	Usage: required
-	Value type: <string>
-	Definition: Specify the alternative function to be configured for the
-		    specified pins.  Valid values are:
-		    "digital",
-		    "analog",
-		    "sink"
-
-- bias-disable:
-	Usage: optional
-	Value type: <none>
-	Definition: The specified pins should be configured as no pull.
-
-- bias-pull-up:
-	Usage: optional
-	Value type: <u32>
-	Definition: The specified pins should be configured as pull up.
-		    Valid values are 600, 10000 and 30000 in bidirectional mode
-		    only, i.e. when operating in qcom,analog-mode and input and
-		    outputs are enabled. The hardware ignores the configuration
-		    when operating in other modes.
-
-- bias-high-impedance:
-	Usage: optional
-	Value type: <none>
-	Definition: The specified pins will put in high-Z mode and disabled.
-
-- input-enable:
-	Usage: optional
-	Value type: <none>
-	Definition: The specified pins are put in input mode, i.e. their input
-		    buffer is enabled
-
-- output-high:
-	Usage: optional
-	Value type: <none>
-	Definition: The specified pins are configured in output mode, driven
-		    high.
-
-- output-low:
-	Usage: optional
-	Value type: <none>
-	Definition: The specified pins are configured in output mode, driven
-		    low.
-
-- power-source:
-	Usage: optional
-	Value type: <u32>
-	Definition: Selects the power source for the specified pins. Valid power
-		    sources are defined in <dt-bindings/pinctrl/qcom,pmic-mpp.h>
-
-- qcom,analog-level:
-	Usage: optional
-	Value type: <u32>
-	Definition: Selects the source for analog output. Valued values are
-		    defined in <dt-binding/pinctrl/qcom,pmic-mpp.h>
-		    PMIC_MPP_AOUT_LVL_*
-
-- qcom,dtest:
-	Usage: optional
-	Value type: <u32>
-	Definition: Selects which dtest rail to be routed in the various functions.
-		    Valid values are 1-4
-
-- qcom,amux-route:
-	Usage: optional
-	Value type: <u32>
-	Definition: Selects the source for analog input. Valid values are
-		    defined in <dt-bindings/pinctrl/qcom,pmic-mpp.h>
-		    PMIC_MPP_AMUX_ROUTE_CH5, PMIC_MPP_AMUX_ROUTE_CH6...
-- qcom,paired:
-	Usage: optional
-	Value type: <none>
-	Definition: Indicates that the pin should be operating in paired mode.
-
-Example:
-
-	mpps@a000 {
-		compatible = "qcom,pm8841-mpp", "qcom,spmi-mpp";
-		reg = <0xa000>;
-		gpio-controller;
-		#gpio-cells = <2>;
-		interrupts = <4 0xa0 0 0>, <4 0xa1 0 0>, <4 0xa2 0 0>, <4 0xa3 0 0>;
-
-		pinctrl-names = "default";
-		pinctrl-0 = <&pm8841_default>;
-
-		pm8841_default: default {
-			gpio {
-				pins = "mpp1", "mpp2", "mpp3", "mpp4";
-				function = "digital";
-				input-enable;
-				power-source = <PM8841_MPP_S3>;
-			};
-		};
-	};
diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
new file mode 100644
index 000000000000..96cb78ab6437
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
@@ -0,0 +1,178 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/qcom,pmic-mpp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm PMIC Multi-Purpose Pin (MPP) block
+
+maintainers:
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+description:
+  This binding describes the MPP block(s) found in the 8xxx series of
+  PMIC's from Qualcomm.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,pm8018-mpp
+          - qcom,pm8019-mpp
+          - qcom,pm8038-mpp
+          - qcom,pm8058-mpp
+          - qcom,pm8821-mpp
+          - qcom,pm8841-mpp
+          - qcom,pm8916-mpp
+          - qcom,pm8917-mpp
+          - qcom,pm8921-mpp
+          - qcom,pm8941-mpp
+          - qcom,pm8950-mpp
+          - qcom,pmi8950-mpp
+          - qcom,pm8994-mpp
+          - qcom,pma8084-mpp
+          - qcom,pmi8994-mpp
+
+      - enum:
+          - qcom,spmi-mpp
+          - qcom,ssbi-mpp
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    maxItems: 12
+    description:
+      Must contain an array of encoded interrupt specifiers for
+      each available MPP
+
+  gpio-controller: true
+
+  gpio-ranges:
+    maxItems: 1
+
+  '#gpio-cells':
+    const: 2
+    description:
+      The first cell will be used to define gpio number and the
+      second denotes the flags for this gpio
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - '#gpio-cells'
+  - gpio-ranges
+  - interrupt-controller
+
+patternProperties:
+  '-state$':
+    oneOf:
+      - $ref: "#/$defs/qcom-pmic-mpp-state"
+      - patternProperties:
+          ".*":
+            $ref: "#/$defs/qcom-pmic-mpp-state"
+
+$defs:
+  qcom-pmic-mpp-state:
+    type: object
+    allOf:
+      - $ref: "pinmux-node.yaml"
+      - $ref: "pincfg-node.yaml"
+    properties:
+      pins:
+        description:
+          List of gpio pins affected by the properties specified in
+          this subnode.  Valid pins are
+                 - mpp1-mpp4 for pm8841
+                 - mpp1-mpp4 for pm8916
+                 - mpp1-mpp8 for pm8941
+                 - mpp1-mpp4 for pm8950
+                 - mpp1-mpp4 for pmi8950
+                 - mpp1-mpp4 for pma8084
+
+        items:
+          pattern: "^mpp([0-9]+)$"
+
+      function:
+        items:
+          - enum:
+              - digital
+              - analog
+              - sink
+
+      bias-disable: true
+      bias-pull-up: true
+      bias-high-impedance: true
+      input-enable: true
+      output-high: true
+      output-low: true
+      power-source: true
+
+      qcom,analog-level:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Selects the source for analog output. Valued values are defined in
+          <dt-binding/pinctrl/qcom,pmic-mpp.h> PMIC_MPP_AOUT_LVL_*
+        enum: [0, 1, 2, 3, 4, 5, 6, 7]
+
+      qcom,atest:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Selects ATEST rail to route to GPIO when it's
+          configured in analog-pass-through mode.
+        enum: [1, 2, 3, 4]
+
+      qcom,dtest:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Selects DTEST rail to route to GPIO when it's
+          configured as digital input.
+        enum: [1, 2, 3, 4]
+
+      qcom,amux-route:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Selects the source for analog input. Valid values are defined in
+          <dt-bindings/pinctrl/qcom,pmic-mpp.h> PMIC_MPP_AMUX_ROUTE_CH5,
+          PMIC_MPP_AMUX_ROUTE_CH6...
+        enum: [0, 1, 2, 3, 4, 5, 6, 7]
+
+      qcom,paired:
+        - description:
+            Indicates that the pin should be operating in paired mode.
+
+    required:
+      - pins
+      - function
+
+    additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
+
+    pm8841_mpp: mpps@a000 {
+      compatible = "qcom,pm8841-mpp", "qcom,spmi-mpp";
+      reg = <0xa000 0>;
+      gpio-controller;
+      #gpio-cells = <2>;
+      gpio-ranges = <&pm8841_mpp 0 0 4>;
+      interrupts = <4 0xa0 0 0>, <4 0xa1 0 0>, <4 0xa2 0 0>, <4 0xa3 0 0>;
+
+      pinctrl-names = "default";
+      pinctrl-0 = <&pm8841_default>;
+
+      default-state {
+        gpio {
+          pins = "mpp1", "mpp2", "mpp3", "mpp4";
+          function = "digital";
+          input-enable;
+          power-source = <PM8841_MPP_S3>;
+        };
+      };
+    };
+...
-- 
2.30.2

Re: [PATCH 1/6] dt-bindings: pinctrl: qcom,pmic-mpp: Convert qcom pmic mpp bindings to YAML

[Rob Herring]

On Tue, 05 Oct 2021 02:22:20 +0300, Dmitry Baryshkov wrote:
> Convert Qualcomm PMIC MPP bindings from .txt to .yaml format.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  .../bindings/pinctrl/qcom,pmic-mpp.txt        | 187 ------------------
>  .../bindings/pinctrl/qcom,pmic-mpp.yaml       | 178 +++++++++++++++++
>  2 files changed, 178 insertions(+), 187 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.txt
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.example.dt.yaml: mpps@a000: 'interrupt-controller' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1536426

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

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

pip3 install dtschema --upgrade

Please check and re-submit.

[PATCH 2/6] dt-bindings: pinctrl: qcom,pmic-mpp: switch to #interrupt-cells

[Dmitry Baryshkov]

Stop specifying individual interrupts properties. Use #interrupt-cells
instead as we are switching qcom,spmi-mpp and qcom,ssbi-mpp to
hierarchical IRQ setup.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 .../devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml  | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
index 96cb78ab6437..ba16d8553c0b 100644
--- a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
@@ -40,12 +40,10 @@ properties:
   reg:
     maxItems: 1
 
-  interrupts:
-    minItems: 1
-    maxItems: 12
-    description:
-      Must contain an array of encoded interrupt specifiers for
-      each available MPP
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
 
   gpio-controller: true
 
@@ -161,7 +159,8 @@ examples:
       gpio-controller;
       #gpio-cells = <2>;
       gpio-ranges = <&pm8841_mpp 0 0 4>;
-      interrupts = <4 0xa0 0 0>, <4 0xa1 0 0>, <4 0xa2 0 0>, <4 0xa3 0 0>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
 
       pinctrl-names = "default";
       pinctrl-0 = <&pm8841_default>;
-- 
2.30.2

[PATCH 3/6] pinctrl: qcom: ssbi-mpp: hardcode IRQ counts

[Dmitry Baryshkov]

The probing of this driver calls platform_irq_count, which will
setup all of the IRQs that are configured in device tree. In
preparation for converting this driver to be a hierarchical IRQ
chip, hardcode the IRQ count based on the hardware type so that all
the IRQs are not configured immediately and are configured on an
as-needed basis later in the boot process.

This change will also allow for the removal of the interrupts property
later in this patch series once the hierarchical IRQ chip support is in.

This patch also removes the generic qcom,ssbi-mpp OF match since we
don't know the number of pins. All of the existing upstream bindings
already include the more-specific binding.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
index 92e7f2602847..a90cada1d657 100644
--- a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
+++ b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
@@ -733,13 +733,12 @@ static int pm8xxx_pin_populate(struct pm8xxx_mpp *pctrl,
 }
 
 static const struct of_device_id pm8xxx_mpp_of_match[] = {
-	{ .compatible = "qcom,pm8018-mpp" },
-	{ .compatible = "qcom,pm8038-mpp" },
-	{ .compatible = "qcom,pm8058-mpp" },
-	{ .compatible = "qcom,pm8917-mpp" },
-	{ .compatible = "qcom,pm8821-mpp" },
-	{ .compatible = "qcom,pm8921-mpp" },
-	{ .compatible = "qcom,ssbi-mpp" },
+	{ .compatible = "qcom,pm8018-mpp", .data = (void *) 6 },
+	{ .compatible = "qcom,pm8038-mpp", .data = (void *) 6 },
+	{ .compatible = "qcom,pm8058-mpp", .data = (void *) 12 },
+	{ .compatible = "qcom,pm8821-mpp", .data = (void *) 4 },
+	{ .compatible = "qcom,pm8917-mpp", .data = (void *) 10 },
+	{ .compatible = "qcom,pm8921-mpp", .data = (void *) 12 },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, pm8xxx_mpp_of_match);
@@ -750,19 +749,14 @@ static int pm8xxx_mpp_probe(struct platform_device *pdev)
 	struct pinctrl_pin_desc *pins;
 	struct pm8xxx_mpp *pctrl;
 	int ret;
-	int i, npins;
+	int i;
 
 	pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
 	if (!pctrl)
 		return -ENOMEM;
 
 	pctrl->dev = &pdev->dev;
-	npins = platform_irq_count(pdev);
-	if (!npins)
-		return -EINVAL;
-	if (npins < 0)
-		return npins;
-	pctrl->npins = npins;
+	pctrl->npins = (uintptr_t) device_get_match_data(&pdev->dev);
 
 	pctrl->regmap = dev_get_regmap(pdev->dev.parent, NULL);
 	if (!pctrl->regmap) {
-- 
2.30.2

[PATCH 4/6] pinctrl: qcom: ssbi-mpp: add support for hierarchical IRQ chip

[Dmitry Baryshkov]

ssbi-mpp did not have any irqchip support so consumers of this in
device tree would need to call gpio[d]_to_irq() in order to get the
proper IRQ on the underlying PMIC. IRQ chips in device tree should be
usable from the start without the consumer having to make an additional
call to get the proper IRQ on the parent. This patch adds hierarchical
IRQ chip support to the ssbi-mpp code to correct this issue.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c | 111 ++++++++++++++++++++----
 1 file changed, 93 insertions(+), 18 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
index a90cada1d657..842940594c4a 100644
--- a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
+++ b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c
@@ -87,7 +87,6 @@
 /**
  * struct pm8xxx_pin_data - dynamic configuration for a pin
  * @reg:		address of the control register
- * @irq:		IRQ from the PMIC interrupt controller
  * @mode:		operating mode for the pin (digital, analog or current sink)
  * @input:		pin is input
  * @output:		pin is output
@@ -103,7 +102,6 @@
  */
 struct pm8xxx_pin_data {
 	unsigned reg;
-	int irq;
 
 	u8 mode;
 
@@ -126,6 +124,7 @@ struct pm8xxx_mpp {
 	struct regmap *regmap;
 	struct pinctrl_dev *pctrl;
 	struct gpio_chip chip;
+	struct irq_chip irq;
 
 	struct pinctrl_desc desc;
 	unsigned npins;
@@ -148,6 +147,8 @@ static const struct pin_config_item pm8xxx_conf_items[] = {
 #endif
 
 #define PM8XXX_MAX_MPPS	12
+#define PM8XXX_MPP_PHYSICAL_OFFSET    1
+
 static const char * const pm8xxx_groups[PM8XXX_MAX_MPPS] = {
 	"mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
 	"mpp9", "mpp10", "mpp11", "mpp12",
@@ -492,12 +493,16 @@ static int pm8xxx_mpp_get(struct gpio_chip *chip, unsigned offset)
 	struct pm8xxx_mpp *pctrl = gpiochip_get_data(chip);
 	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
 	bool state;
-	int ret;
+	int ret, irq;
 
 	if (!pin->input)
 		return !!pin->output_value;
 
-	ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state);
+	irq = chip->to_irq(chip, offset);
+	if (irq < 0)
+		return irq;
+
+	ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state);
 	if (!ret)
 		ret = !!state;
 
@@ -524,18 +529,10 @@ static int pm8xxx_mpp_of_xlate(struct gpio_chip *chip,
 	if (flags)
 		*flags = gpio_desc->args[1];
 
-	return gpio_desc->args[0] - 1;
+	return gpio_desc->args[0] - PM8XXX_MPP_PHYSICAL_OFFSET;
 }
 
 
-static int pm8xxx_mpp_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct pm8xxx_mpp *pctrl = gpiochip_get_data(chip);
-	struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data;
-
-	return pin->irq;
-}
-
 #ifdef CONFIG_DEBUG_FS
 #include <linux/seq_file.h>
 
@@ -558,7 +555,7 @@ static void pm8xxx_mpp_dbg_show_one(struct seq_file *s,
 		"abus3",
 	};
 
-	seq_printf(s, " mpp%-2d:", offset + 1);
+	seq_printf(s, " mpp%-2d:", offset + PM8XXX_MPP_PHYSICAL_OFFSET);
 
 	switch (pin->mode) {
 	case PM8XXX_MPP_DIGITAL:
@@ -640,7 +637,6 @@ static const struct gpio_chip pm8xxx_mpp_template = {
 	.get = pm8xxx_mpp_get,
 	.set = pm8xxx_mpp_set,
 	.of_xlate = pm8xxx_mpp_of_xlate,
-	.to_irq = pm8xxx_mpp_to_irq,
 	.dbg_show = pm8xxx_mpp_dbg_show,
 	.owner = THIS_MODULE,
 };
@@ -732,6 +728,55 @@ static int pm8xxx_pin_populate(struct pm8xxx_mpp *pctrl,
 	return 0;
 }
 
+static int pm8xxx_mpp_domain_translate(struct irq_domain *domain,
+				   struct irq_fwspec *fwspec,
+				   unsigned long *hwirq,
+				   unsigned int *type)
+{
+	struct pm8xxx_mpp *pctrl = container_of(domain->host_data,
+						 struct pm8xxx_mpp, chip);
+
+	if (fwspec->param_count != 2 ||
+	    fwspec->param[0] < PM8XXX_MPP_PHYSICAL_OFFSET ||
+	    fwspec->param[0] > pctrl->chip.ngpio)
+		return -EINVAL;
+
+	*hwirq = fwspec->param[0] - PM8XXX_MPP_PHYSICAL_OFFSET;
+	*type = fwspec->param[1];
+
+	return 0;
+}
+
+static unsigned int pm8xxx_mpp_child_offset_to_irq(struct gpio_chip *chip,
+						   unsigned int offset)
+{
+	return offset + PM8XXX_MPP_PHYSICAL_OFFSET;
+}
+
+static int pm8821_mpp_child_to_parent_hwirq(struct gpio_chip *chip,
+					    unsigned int child_hwirq,
+					    unsigned int child_type,
+					    unsigned int *parent_hwirq,
+					    unsigned int *parent_type)
+{
+	*parent_hwirq = child_hwirq + 24;
+	*parent_type = child_type;
+
+	return 0;
+}
+
+static int pm8xxx_mpp_child_to_parent_hwirq(struct gpio_chip *chip,
+					    unsigned int child_hwirq,
+					    unsigned int child_type,
+					    unsigned int *parent_hwirq,
+					    unsigned int *parent_type)
+{
+	*parent_hwirq = child_hwirq + 0x80;
+	*parent_type = child_type;
+
+	return 0;
+}
+
 static const struct of_device_id pm8xxx_mpp_of_match[] = {
 	{ .compatible = "qcom,pm8018-mpp", .data = (void *) 6 },
 	{ .compatible = "qcom,pm8038-mpp", .data = (void *) 6 },
@@ -746,7 +791,10 @@ MODULE_DEVICE_TABLE(of, pm8xxx_mpp_of_match);
 static int pm8xxx_mpp_probe(struct platform_device *pdev)
 {
 	struct pm8xxx_pin_data *pin_data;
+	struct irq_domain *parent_domain;
+	struct device_node *parent_node;
 	struct pinctrl_pin_desc *pins;
+	struct gpio_irq_chip *girq;
 	struct pm8xxx_mpp *pctrl;
 	int ret;
 	int i;
@@ -783,9 +831,6 @@ static int pm8xxx_mpp_probe(struct platform_device *pdev)
 
 	for (i = 0; i < pctrl->desc.npins; i++) {
 		pin_data[i].reg = SSBI_REG_ADDR_MPP(i);
-		pin_data[i].irq = platform_get_irq(pdev, i);
-		if (pin_data[i].irq < 0)
-			return pin_data[i].irq;
 
 		ret = pm8xxx_pin_populate(pctrl, &pin_data[i]);
 		if (ret)
@@ -816,6 +861,36 @@ static int pm8xxx_mpp_probe(struct platform_device *pdev)
 	pctrl->chip.of_gpio_n_cells = 2;
 	pctrl->chip.label = dev_name(pctrl->dev);
 	pctrl->chip.ngpio = pctrl->npins;
+
+	parent_node = of_irq_find_parent(pctrl->dev->of_node);
+	if (!parent_node)
+		return -ENXIO;
+
+	parent_domain = irq_find_host(parent_node);
+	of_node_put(parent_node);
+	if (!parent_domain)
+		return -ENXIO;
+
+	pctrl->irq.name = "ssbi-mpp";
+	pctrl->irq.irq_mask_ack = irq_chip_mask_ack_parent;
+	pctrl->irq.irq_unmask = irq_chip_unmask_parent;
+	pctrl->irq.irq_set_type = irq_chip_set_type_parent;
+	pctrl->irq.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE;
+
+	girq = &pctrl->chip.irq;
+	girq->chip = &pctrl->irq;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_level_irq;
+	girq->fwnode = of_node_to_fwnode(pctrl->dev->of_node);
+	girq->parent_domain = parent_domain;
+	if (of_device_is_compatible(pdev->dev.of_node, "qcom,pm8821-mpp"))
+		girq->child_to_parent_hwirq = pm8821_mpp_child_to_parent_hwirq;
+	else
+		girq->child_to_parent_hwirq = pm8xxx_mpp_child_to_parent_hwirq;
+	girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_twocell;
+	girq->child_offset_to_irq = pm8xxx_mpp_child_offset_to_irq;
+	girq->child_irq_domain_ops.translate = pm8xxx_mpp_domain_translate;
+
 	ret = gpiochip_add_data(&pctrl->chip, pctrl);
 	if (ret) {
 		dev_err(&pdev->dev, "failed register gpiochip\n");
-- 
2.30.2

[PATCH 5/6] pinctrl: qcom: spmi-mpp: hardcode IRQ counts

[Dmitry Baryshkov]

The probing of this driver calls platform_irq_count, which will
setup all of the IRQs that are configured in device tree. In
preparation for converting this driver to be a hierarchical IRQ
chip, hardcode the IRQ count based on the hardware type so that all
the IRQs are not configured immediately and are configured on an
as-needed basis later in the boot process.

This change will also allow for the removal of the interrupts property
later in this patch series once the hierarchical IRQ chip support is in.

This patch also removes the generic qcom,spmi-mpp OF match since we
don't know the number of pins. All of the existing upstream bindings
already include the more-specific binding.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c | 25 ++++++++++---------------
 1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
index 2da9b5f68f3f..a9f994863126 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
@@ -812,11 +812,7 @@ static int pmic_mpp_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	npins = platform_irq_count(pdev);
-	if (!npins)
-		return -EINVAL;
-	if (npins < 0)
-		return npins;
+	npins = (uintptr_t) device_get_match_data(&pdev->dev);
 
 	BUG_ON(npins > ARRAY_SIZE(pmic_mpp_groups));
 
@@ -912,16 +908,15 @@ static int pmic_mpp_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id pmic_mpp_of_match[] = {
-	{ .compatible = "qcom,pm8019-mpp" },	/* 6 MPP's */
-	{ .compatible = "qcom,pm8841-mpp" },	/* 4 MPP's */
-	{ .compatible = "qcom,pm8916-mpp" },	/* 4 MPP's */
-	{ .compatible = "qcom,pm8941-mpp" },	/* 8 MPP's */
-	{ .compatible = "qcom,pm8950-mpp" },	/* 4 MPP's */
-	{ .compatible = "qcom,pmi8950-mpp" },	/* 4 MPP's */
-	{ .compatible = "qcom,pm8994-mpp" },	/* 8 MPP's */
-	{ .compatible = "qcom,pma8084-mpp" },	/* 8 MPP's */
-	{ .compatible = "qcom,pmi8994-mpp" },	/* 4 MPP's */
-	{ .compatible = "qcom,spmi-mpp" },	/* Generic */
+	{ .compatible = "qcom,pm8019-mpp", .data = (void *) 6 },
+	{ .compatible = "qcom,pm8841-mpp", .data = (void *) 4 },
+	{ .compatible = "qcom,pm8916-mpp", .data = (void *) 4 },
+	{ .compatible = "qcom,pm8941-mpp", .data = (void *) 8 },
+	{ .compatible = "qcom,pm8950-mpp", .data = (void *) 4 },
+	{ .compatible = "qcom,pmi8950-mpp", .data = (void *) 4 },
+	{ .compatible = "qcom,pm8994-mpp", .data = (void *) 8 },
+	{ .compatible = "qcom,pma8084-mpp", .data = (void *) 8 },
+	{ .compatible = "qcom,pmi8994-mpp", .data = (void *) 4 },
 	{ },
 };
 
-- 
2.30.2

[PATCH 6/6] pinctrl: qcom: spmi-mpp: add support for hierarchical IRQ chip

[Dmitry Baryshkov]

spmi-mpp did not have any irqchip support so consumers of this in
device tree would need to call gpio[d]_to_irq() in order to get the
proper IRQ on the underlying PMIC. IRQ chips in device tree should be
usable from the start without the consumer having to make an additional
call to get the proper IRQ on the parent. This patch adds hierarchical
IRQ chip support to the spmi-mpp code to correct this issue.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c | 86 ++++++++++++++++++++-----
 1 file changed, 69 insertions(+), 17 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
index a9f994863126..b80723928b7e 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
@@ -103,7 +103,6 @@
 /**
  * struct pmic_mpp_pad - keep current MPP settings
  * @base: Address base in SPMI device.
- * @irq: IRQ number which this MPP generate.
  * @is_enabled: Set to false when MPP should be put in high Z state.
  * @out_value: Cached pin output value.
  * @output_enabled: Set to true if MPP output logic is enabled.
@@ -121,7 +120,6 @@
  */
 struct pmic_mpp_pad {
 	u16		base;
-	int		irq;
 	bool		is_enabled;
 	bool		out_value;
 	bool		output_enabled;
@@ -143,6 +141,7 @@ struct pmic_mpp_state {
 	struct regmap	*map;
 	struct pinctrl_dev *ctrl;
 	struct gpio_chip chip;
+	struct irq_chip irq;
 };
 
 static const struct pinconf_generic_params pmic_mpp_bindings[] = {
@@ -622,16 +621,6 @@ static int pmic_mpp_of_xlate(struct gpio_chip *chip,
 	return gpio_desc->args[0] - PMIC_MPP_PHYSICAL_OFFSET;
 }
 
-static int pmic_mpp_to_irq(struct gpio_chip *chip, unsigned pin)
-{
-	struct pmic_mpp_state *state = gpiochip_get_data(chip);
-	struct pmic_mpp_pad *pad;
-
-	pad = state->ctrl->desc->pins[pin].drv_data;
-
-	return pad->irq;
-}
-
 static void pmic_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
 	struct pmic_mpp_state *state = gpiochip_get_data(chip);
@@ -651,7 +640,6 @@ static const struct gpio_chip pmic_mpp_gpio_template = {
 	.request		= gpiochip_generic_request,
 	.free			= gpiochip_generic_free,
 	.of_xlate		= pmic_mpp_of_xlate,
-	.to_irq			= pmic_mpp_to_irq,
 	.dbg_show		= pmic_mpp_dbg_show,
 };
 
@@ -796,13 +784,53 @@ static int pmic_mpp_populate(struct pmic_mpp_state *state,
 	return 0;
 }
 
+static int pmic_mpp_domain_translate(struct irq_domain *domain,
+				      struct irq_fwspec *fwspec,
+				      unsigned long *hwirq,
+				      unsigned int *type)
+{
+	struct pmic_mpp_state *state = container_of(domain->host_data,
+						     struct pmic_mpp_state,
+						     chip);
+
+	if (fwspec->param_count != 2 ||
+	    fwspec->param[0] < 1 || fwspec->param[0] > state->chip.ngpio)
+		return -EINVAL;
+
+	*hwirq = fwspec->param[0] - PMIC_MPP_PHYSICAL_OFFSET;
+	*type = fwspec->param[1];
+
+	return 0;
+}
+
+static unsigned int pmic_mpp_child_offset_to_irq(struct gpio_chip *chip,
+						  unsigned int offset)
+{
+	return offset + PMIC_MPP_PHYSICAL_OFFSET;
+}
+
+static int pmic_mpp_child_to_parent_hwirq(struct gpio_chip *chip,
+					   unsigned int child_hwirq,
+					   unsigned int child_type,
+					   unsigned int *parent_hwirq,
+					   unsigned int *parent_type)
+{
+	*parent_hwirq = child_hwirq + 0xc0;
+	*parent_type = child_type;
+
+	return 0;
+}
+
 static int pmic_mpp_probe(struct platform_device *pdev)
 {
+	struct irq_domain *parent_domain;
+	struct device_node *parent_node;
 	struct device *dev = &pdev->dev;
 	struct pinctrl_pin_desc *pindesc;
 	struct pinctrl_desc *pctrldesc;
 	struct pmic_mpp_pad *pad, *pads;
 	struct pmic_mpp_state *state;
+	struct gpio_irq_chip *girq;
 	int ret, npins, i;
 	u32 reg;
 
@@ -857,10 +885,6 @@ static int pmic_mpp_probe(struct platform_device *pdev)
 		pindesc->number = i;
 		pindesc->name = pmic_mpp_groups[i];
 
-		pad->irq = platform_get_irq(pdev, i);
-		if (pad->irq < 0)
-			return pad->irq;
-
 		pad->base = reg + i * PMIC_MPP_ADDRESS_RANGE;
 
 		ret = pmic_mpp_populate(state, pad);
@@ -880,6 +904,34 @@ static int pmic_mpp_probe(struct platform_device *pdev)
 	if (IS_ERR(state->ctrl))
 		return PTR_ERR(state->ctrl);
 
+	parent_node = of_irq_find_parent(state->dev->of_node);
+	if (!parent_node)
+		return -ENXIO;
+
+	parent_domain = irq_find_host(parent_node);
+	of_node_put(parent_node);
+	if (!parent_domain)
+		return -ENXIO;
+
+	state->irq.name = "spmi-mpp",
+	state->irq.irq_ack = irq_chip_ack_parent,
+	state->irq.irq_mask = irq_chip_mask_parent,
+	state->irq.irq_unmask = irq_chip_unmask_parent,
+	state->irq.irq_set_type = irq_chip_set_type_parent,
+	state->irq.irq_set_wake = irq_chip_set_wake_parent,
+	state->irq.flags = IRQCHIP_MASK_ON_SUSPEND,
+
+	girq = &state->chip.irq;
+	girq->chip = &state->irq;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_level_irq;
+	girq->fwnode = of_node_to_fwnode(state->dev->of_node);
+	girq->parent_domain = parent_domain;
+	girq->child_to_parent_hwirq = pmic_mpp_child_to_parent_hwirq;
+	girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_fourcell;
+	girq->child_offset_to_irq = pmic_mpp_child_offset_to_irq;
+	girq->child_irq_domain_ops.translate = pmic_mpp_domain_translate;
+
 	ret = gpiochip_add_data(&state->chip, state);
 	if (ret) {
 		dev_err(state->dev, "can't add gpio chip\n");
-- 
2.30.2