[PATCH v3 5/5] dt-bindings: pinctrl: Convert Atmel PIO3 pinctrl to json-schema
From: Manikandan Muralidharan
Date: Tue Jul 09 2024 - 05:26:46 EST
Convert Atmel PIO3 pinctrl binding document to DT schema format
json-schema.
Signed-off-by: Manikandan Muralidharan <manikandan.m@xxxxxxxxxxxxx>
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
changes in v3:
- Remove quotes in $ref
- modify the gpio regex
- Remove pinmux pinctrl subnode regex and modify it since they do not
follow a particular order or pattern, Adding 'type:object' with this
'^[a-z0-9-_]+$' regex does throw DTC_CHK errors for other
pio3 pinctrl properties
changes in v2:
- Fix bot errors by fixing issues in 4/5
- remove qoutes from $ref
---
.../bindings/pinctrl/atmel,at91-pinctrl.txt | 178 -----------------
.../pinctrl/atmel,at91rm9200-pinctrl.yaml | 184 ++++++++++++++++++
2 files changed, 184 insertions(+), 178 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
create mode 100644 Documentation/devicetree/bindings/pinctrl/atmel,at91rm9200-pinctrl.yaml
diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
deleted file mode 100644
index 0aa1a53012d6..000000000000
--- a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
+++ /dev/null
@@ -1,178 +0,0 @@
-* Atmel AT91 Pinmux Controller
-
-The AT91 Pinmux Controller, enables the IC
-to share one PAD to several functional blocks. The sharing is done by
-multiplexing the PAD input/output signals. For each PAD there are up to
-8 muxing options (called periph modes). Since different modules require
-different PAD settings (like pull up, keeper, etc) the controller controls
-also the PAD settings parameters.
-
-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".
-
-Atmel AT91 pin configuration node is a node of a group of pins which can be
-used for a specific device or function. This node represents both mux and config
-of the pins in that group. The 'pins' selects the function mode(also named pin
-mode) this pin can work on and the 'config' configures various pad settings
-such as pull-up, multi drive, etc.
-
-Required properties for iomux controller:
-- compatible: "atmel,at91rm9200-pinctrl" or "atmel,at91sam9x5-pinctrl"
- or "atmel,sama5d3-pinctrl" or "microchip,sam9x60-pinctrl"
- or "microchip,sam9x7-pinctrl", "microchip,sam9x60-pinctrl"
-- atmel,mux-mask: array of mask (periph per bank) to describe if a pin can be
- configured in this periph mode. All the periph and bank need to be describe.
-
-How to create such array:
-
-Each column will represent the possible peripheral of the pinctrl
-Each line will represent a pio bank
-
-Take an example on the 9260
-Peripheral: 2 ( A and B)
-Bank: 3 (A, B and C)
-=>
-
- /* A B */
- 0xffffffff 0xffc00c3b /* pioA */
- 0xffffffff 0x7fff3ccf /* pioB */
- 0xffffffff 0x007fffff /* pioC */
-
-For each peripheral/bank we will describe in a u32 if a pin can be
-configured in it by putting 1 to the pin bit (1 << pin)
-
-Let's take the pioA on peripheral B
-From the datasheet Table 10-2.
-Peripheral B
-PA0 MCDB0
-PA1 MCCDB
-PA2
-PA3 MCDB3
-PA4 MCDB2
-PA5 MCDB1
-PA6
-PA7
-PA8
-PA9
-PA10 ETX2
-PA11 ETX3
-PA12
-PA13
-PA14
-PA15
-PA16
-PA17
-PA18
-PA19
-PA20
-PA21
-PA22 ETXER
-PA23 ETX2
-PA24 ETX3
-PA25 ERX2
-PA26 ERX3
-PA27 ERXCK
-PA28 ECRS
-PA29 ECOL
-PA30 RXD4
-PA31 TXD4
-
-=> 0xffc00c3b
-
-Required properties for pin configuration node:
-- atmel,pins: 4 integers array, represents a group of pins mux and config
- setting. The format is atmel,pins = <PIN_BANK PIN_BANK_NUM PERIPH CONFIG>.
- The PERIPH 0 means gpio, PERIPH 1 is periph A, PERIPH 2 is periph B...
- PIN_BANK 0 is pioA, PIN_BANK 1 is pioB...
-
-Bits used for CONFIG:
-PULL_UP (1 << 0): indicate this pin needs a pull up.
-MULTIDRIVE (1 << 1): indicate this pin needs to be configured as multi-drive.
- Multi-drive is equivalent to open-drain type output.
-DEGLITCH (1 << 2): indicate this pin needs deglitch.
-PULL_DOWN (1 << 3): indicate this pin needs a pull down.
-DIS_SCHMIT (1 << 4): indicate this pin needs to the disable schmitt trigger.
-DRIVE_STRENGTH (3 << 5): indicate the drive strength of the pin using the
- following values:
- 00 - No change (reset state value kept)
- 01 - Low
- 10 - Medium
- 11 - High
-OUTPUT (1 << 7): indicate this pin need to be configured as an output.
-OUTPUT_VAL (1 << 8): output val (1 = high, 0 = low)
-SLEWRATE (1 << 9): slew rate of the pin: 0 = disable, 1 = enable
-DEBOUNCE (1 << 16): indicate this pin needs debounce.
-DEBOUNCE_VAL (0x3fff << 17): debounce value.
-
-NOTE:
-Some requirements for using atmel,at91rm9200-pinctrl binding:
-1. We have pin function node defined under at91 controller node to represent
- what pinmux functions this SoC supports.
-2. The driver can use the function node's name and pin configuration node's
- name describe the pin function and group hierarchy.
- For example, Linux at91 pinctrl driver takes the function node's name
- as the function name and pin configuration node's name as group name to
- create the map table.
-3. Each pin configuration node should have a phandle, devices can set pins
- configurations by referring to the phandle of that pin configuration node.
-4. The gpio controller must be describe in the pinctrl simple-bus.
-
-For each bank the required properties are:
-- compatible: "atmel,at91sam9x5-gpio" or "atmel,at91rm9200-gpio" or
- "microchip,sam9x60-gpio"
- or "microchip,sam9x7-gpio", "microchip,sam9x60-gpio", "atmel,at91rm9200-gpio"
-- reg: physical base address and length of the controller's registers
-- interrupts: interrupt outputs from the controller
-- interrupt-controller: marks the device node as an interrupt controller
-- #interrupt-cells: should be 2; refer to ../interrupt-controller/interrupts.txt
- for more details.
-- gpio-controller
-- #gpio-cells: should be 2; the first cell is the GPIO number and the second
- cell specifies GPIO flags as defined in <dt-bindings/gpio/gpio.h>.
-- clocks: bank clock
-
-Examples:
-
-pinctrl@fffff400 {
- #address-cells = <1>;
- #size-cells = <1>;
- ranges;
- compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
- reg = <0xfffff400 0x600>;
-
- pioA: gpio@fffff400 {
- compatible = "atmel,at91sam9x5-gpio";
- reg = <0xfffff400 0x200>;
- interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
- #gpio-cells = <2>;
- gpio-controller;
- interrupt-controller;
- #interrupt-cells = <2>;
- clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
- };
-
- atmel,mux-mask = <
- /* A B */
- 0xffffffff 0xffc00c3b /* pioA */
- 0xffffffff 0x7fff3ccf /* pioB */
- 0xffffffff 0x007fffff /* pioC */
- >;
-
- /* shared pinctrl settings */
- dbgu {
- pinctrl_dbgu: dbgu-0 {
- atmel,pins =
- <1 14 0x1 0x0 /* PB14 periph A */
- 1 15 0x1 0x1>; /* PB15 periph A with pullup */
- };
- };
-};
-
-dbgu: serial@fffff200 {
- compatible = "atmel,at91sam9260-usart";
- reg = <0xfffff200 0x200>;
- interrupts = <1 4 7>;
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_dbgu>;
-};
diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91rm9200-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/atmel,at91rm9200-pinctrl.yaml
new file mode 100644
index 000000000000..1bb386b42039
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/atmel,at91rm9200-pinctrl.yaml
@@ -0,0 +1,184 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/atmel,at91rm9200-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PIO3 Pinmux Controller
+
+maintainers:
+ - Manikandan Muralidharan <manikandan.m@xxxxxxxxxxxxx>
+
+description:
+ The AT91 Pinmux Controller, enables the IC to share one PAD to several
+ functional blocks. The sharing is done by multiplexing the PAD input/output
+ signals. For each PAD there are up to 8 muxing options (called periph modes).
+ Since different modules require different PAD settings (like pull up, keeper,
+ etc) the controller controls also the PAD settings parameters.
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - atmel,at91rm9200-pinctrl
+ - atmel,at91sam9x5-pinctrl
+ - atmel,sama5d3-pinctrl
+ - microchip,sam9x60-pinctrl
+ - const: simple-mfd
+ - items:
+ - enum:
+ - microchip,sam9x7-pinctrl
+ - const: microchip,sam9x60-pinctrl
+ - const: simple-mfd
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 1
+
+ ranges: true
+
+ atmel,mux-mask:
+ $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ description: |
+ Array of mask (periph per bank) to describe if a pin can be
+ configured in this periph mode. All the periph and bank need to
+ be described.
+
+ #How to create such array:
+
+ Each column will represent the possible peripheral of the pinctrl
+ Each line will represent a pio bank
+
+ #Example:
+
+ In at91sam9260.dtsi,
+ Peripheral: 2 ( A and B)
+ Bank: 3 (A, B and C)
+
+ # A B
+ 0xffffffff 0xffc00c3b # pioA
+ 0xffffffff 0x7fff3ccf # pioB
+ 0xffffffff 0x007fffff # pioC
+
+ For each peripheral/bank we will describe in a u32 if a pin can be
+ configured in it by putting 1 to the pin bit (1 << pin)
+
+ Let's take the pioA on peripheral B whose value is 0xffc00c3b
+ From the datasheet Table 10-2.
+ Peripheral B
+ PA0 MCDB0
+ PA1 MCCDB
+ PA2
+ PA3 MCDB3
+ PA4 MCDB2
+ PA5 MCDB1
+ PA6
+ PA7
+ PA8
+ PA9
+ PA10 ETX2
+ PA11 ETX3
+ PA12
+ PA13
+ PA14
+ PA15
+ PA16
+ PA17
+ PA18
+ PA19
+ PA20
+ PA21
+ PA22 ETXER
+ PA23 ETX2
+ PA24 ETX3
+ PA25 ERX2
+ PA26 ERX3
+ PA27 ERXCK
+ PA28 ECRS
+ PA29 ECOL
+ PA30 RXD4
+ PA31 TXD4
+
+allOf:
+ - $ref: pinctrl.yaml#
+
+required:
+ - compatible
+ - ranges
+ - "#address-cells"
+ - "#size-cells"
+ - atmel,mux-mask
+
+patternProperties:
+ 'gpio@[0-9a-f]+$':
+ $ref: /schemas/gpio/atmel,at91rm9200-gpio.yaml
+ unevaluatedProperties: false
+
+additionalProperties:
+ type: object
+ additionalProperties:
+ type: object
+ additionalProperties: false
+
+ properties:
+ atmel,pins:
+ $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ description: |
+ Each entry consists of 4 integers and represents the pins
+ mux and config setting.The format is
+ atmel,pins = <PIN_BANK PIN_BANK_NUM PERIPH CONFIG>.
+ Supported pin number and mux varies for different SoCs, and
+ are defined in <include/dt-bindings/pinctrl/at91.h>.
+ items:
+ items:
+ - description:
+ Pin bank
+ - description:
+ Pin bank index
+ - description:
+ Peripheral function
+ - description:
+ Pad configuration
+
+examples:
+ - |
+ #include <dt-bindings/clock/at91.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/pinctrl/at91.h>
+
+ pinctrl@fffff400 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "atmel,at91rm9200-pinctrl", "simple-mfd";
+ ranges = <0xfffff400 0xfffff400 0x600>;
+
+ atmel,mux-mask = <
+ /* A B */
+ 0xffffffff 0xffc00c3b /* pioA */
+ 0xffffffff 0x7fff3ccf /* pioB */
+ 0xffffffff 0x007fffff /* pioC */
+ >;
+
+ dbgu {
+ pinctrl_dbgu: dbgu-0 {
+ atmel,pins =
+ <AT91_PIOB 14 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
+ AT91_PIOB 15 AT91_PERIPH_A AT91_PINCTRL_NONE>;
+ };
+ };
+
+ pioA: gpio@fffff400 {
+ compatible = "atmel,at91rm9200-gpio";
+ reg = <0xfffff400 0x200>;
+ interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
+ };
+ };
+...
--
2.25.1