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dt-bindings: pinctrl: ti,dra7-iodelay: Convert to DT schema

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Convert TI IODELAY controller from text to DT schema. Document child
properties missing from text bindings for proper validation.

Signed-off-by: Bhargav Joshi <j.bhargav.u@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>
This commit is contained in:
Bhargav Joshi 2026-07-22 22:15:54 +05:30 committed by Linus Walleij
parent 35ff52e54b
commit 7716c99fa7
2 changed files with 83 additions and 47 deletions
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83
Documentation/devicetree/bindings/pinctrl/ti,dra7-iodelay.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/ti,dra7-iodelay.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Pin configuration for TI IODELAY controller
maintainers:
- Nishanth Menon <nm@ti.com>
- Bhargav Joshi <j.bhargav.u@gmail.com>
description:
TI dra7 based SoCs such as am57xx have a controller for setting the IO delay
for each pin. For most part the IO delay values are programmed by the
bootloader, but some pins need to be configured dynamically by the kernel such
as the MMC pins.
properties:
compatible:
const: ti,dra7-iodelay
reg:
maxItems: 1
'#address-cells':
const: 1
'#size-cells':
const: 0
'#pinctrl-cells':
const: 2
patternProperties:
^.*_conf$:
type: object
additionalProperties: false
properties:
pinctrl-pin-array:
$ref: /schemas/types.yaml#/definitions/uint32-array
description: |
An array of 32-bit integers defining the pin delay configuration.
required:
- pinctrl-pin-array
required:
- compatible
- reg
- '#address-cells'
- '#size-cells'
- '#pinctrl-cells'
additionalProperties: false
examples:
- |
#include <dt-bindings/pinctrl/dra.h>
padconf@4844a000 {
compatible = "ti,dra7-iodelay";
reg = <0x4844a000 0x0d1c>;
#address-cells = <1>;
#size-cells = <0>;
#pinctrl-cells = <2>;
mmc2_iodelay_3v3_conf {
pinctrl-pin-array = <
0x18c A_DELAY_PS(0) G_DELAY_PS(120) /* CFG_GPMC_A19_IN */
0x1a4 A_DELAY_PS(265) G_DELAY_PS(360) /* CFG_GPMC_A20_IN */
0x1b0 A_DELAY_PS(0) G_DELAY_PS(120) /* CFG_GPMC_A21_IN */
0x1bc A_DELAY_PS(0) G_DELAY_PS(120) /* CFG_GPMC_A22_IN */
0x1c8 A_DELAY_PS(287) G_DELAY_PS(420) /* CFG_GPMC_A23_IN */
0x1d4 A_DELAY_PS(144) G_DELAY_PS(240) /* CFG_GPMC_A24_IN */
0x1e0 A_DELAY_PS(0) G_DELAY_PS(0) /* CFG_GPMC_A25_IN */
0x1ec A_DELAY_PS(120) G_DELAY_PS(0) /* CFG_GPMC_A26_IN */
0x1f8 A_DELAY_PS(120) G_DELAY_PS(180) /* CFG_GPMC_A27_IN */
0x360 A_DELAY_PS(0) G_DELAY_PS(0) /* CFG_GPMC_CS1_IN */
>;
};
};

47
Documentation/devicetree/bindings/pinctrl/ti,iodelay.txt
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* Pin configuration for TI IODELAY controller
TI dra7 based SoCs such as am57xx have a controller for setting the IO delay
for each pin. For most part the IO delay values are programmed by the bootloader,
but some pins need to be configured dynamically by the kernel such as the
MMC pins.
Required Properties:
- compatible: Must be "ti,dra7-iodelay"
- reg: Base address and length of the memory resource used
- #address-cells: Number of address cells
- #size-cells: Size of cells
- #pinctrl-cells: Number of pinctrl cells, must be 2. See also
Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
Example
-------
In the SoC specific dtsi file:
dra7_iodelay_core: padconf@4844a000 {
compatible = "ti,dra7-iodelay";
reg = <0x4844a000 0x0d1c>;
#address-cells = <1>;
#size-cells = <0>;
#pinctrl-cells = <2>;
};
In board-specific file:
&dra7_iodelay_core {
mmc2_iodelay_3v3_conf: mmc2_iodelay_3v3_conf {
pinctrl-pin-array = <
0x18c A_DELAY_PS(0) G_DELAY_PS(120) /* CFG_GPMC_A19_IN */
0x1a4 A_DELAY_PS(265) G_DELAY_PS(360) /* CFG_GPMC_A20_IN */
0x1b0 A_DELAY_PS(0) G_DELAY_PS(120) /* CFG_GPMC_A21_IN */
0x1bc A_DELAY_PS(0) G_DELAY_PS(120) /* CFG_GPMC_A22_IN */
0x1c8 A_DELAY_PS(287) G_DELAY_PS(420) /* CFG_GPMC_A23_IN */
0x1d4 A_DELAY_PS(144) G_DELAY_PS(240) /* CFG_GPMC_A24_IN */
0x1e0 A_DELAY_PS(0) G_DELAY_PS(0) /* CFG_GPMC_A25_IN */
0x1ec A_DELAY_PS(120) G_DELAY_PS(0) /* CFG_GPMC_A26_IN */
0x1f8 A_DELAY_PS(120) G_DELAY_PS(180) /* CFG_GPMC_A27_IN */
0x360 A_DELAY_PS(0) G_DELAY_PS(0) /* CFG_GPMC_CS1_IN */
>;
};
};