The 'ata-generic' binding has been around since 2008, but never documented. Cc: Alexander Shiyan <shc_work@xxxxxxx> Signed-off-by: Rob Herring <robh@xxxxxxxxxx> --- AFAICT, the ata-generic,use16bit property has no effect in Linux. The 32-bit transfers fallback to 16-bit if ATA_PFLAG_PIO32 flag is not set which it doesn't appear to ever be set. Looking at the history, the driver always used 16-bit mode. Linus, Okay with being maintainer here? --- .../devicetree/bindings/ata/ata-generic.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/ata/ata-generic.yaml diff --git a/Documentation/devicetree/bindings/ata/ata-generic.yaml b/Documentation/devicetree/bindings/ata/ata-generic.yaml new file mode 100644 index 000000000000..0697927f3d7e --- /dev/null +++ b/Documentation/devicetree/bindings/ata/ata-generic.yaml @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/ata/ata-generic.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic Parallel ATA Controller + +maintainers: + - Linus Walleij <linus.walleij@xxxxxxxxxx> + +description: + Generic Parallel ATA controllers supporting PIO modes only. + +properties: + compatible: + items: + - enum: + - arm,vexpress-cf + - fsl,mpc8349emitx-pata + - const: ata-generic + + reg: + items: + - description: Command interface registers + - description: Control interface registers + + reg-shift: + enum: [ 1, 2 ] + + interrupts: + maxItems: 1 + + ata-generic,use16bit: + type: boolean + description: Use 16-bit accesses instead of 32-bit for data transfers + + pio-mode: + description: Maximum ATA PIO transfer mode + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 6 + default: 0 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + compact-flash@1a000 { + compatible = "arm,vexpress-cf", "ata-generic"; + reg = <0x1a000 0x100>, + <0x1a100 0xf00>; + reg-shift = <2>; + }; +... -- 2.35.1
