On Mon, Aug 24, 2020 at 08:58:01AM +0200, Sascha Hauer wrote:

On Mon, Aug 24, 2020 at 08:38:06AM +0200, Krzysztof Kozlowski wrote:

quoted

On Mon, Aug 24, 2020 at 07:24:46AM +0200, Sascha Hauer wrote:

quoted

On Sun, Aug 23, 2020 at 06:15:30PM +0200, Krzysztof Kozlowski wrote:

quoted

The GPIO controller node can have gpio-ranges property.  This fixes
dtbs_check warnings like:

  arch/arm64/boot/dts/freescale/imx8mm-evk.dt.yaml: gpio@30200000: 'gpio-ranges' does not match any of the regexes: 'pinctrl-[0-9]+'
    From schema: Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 .../devicetree/bindings/gpio/fsl-imx-gpio.yaml    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
index 454db20c2d1a..1fac69573bb9 100644
--- a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml

@@ -51,6 +51,9 @@ properties:
 
   gpio-controller: true
 
+  gpio-ranges:
+    maxItems: 1
+
 required:
   - compatible
   - reg

@@ -62,6 +65,18 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8mp-gpio
+    then:
+      properties:
+        gpio-ranges:
+          minItems: 1
+          maxItems: 2

Why do you limit this to fsl,imx8mp-gpio? The i.MX5,6,7 dtsi files use
gpio-ranges as well and other i.MX dtsi files could also use it.

All other cases use maximum one element in gpio-ranges, so they are
covered so I assumed they are continuous. But if it not the case, I can
make all them maximum 2.

I misread this, I thought you allow gpio-ranges only for imx8mp, but
it's only the maxItems you set differently for that SoC. Anyway,
arch/arm/boot/dts/imx6dl.dtsi has this:

&gpio1 {
        gpio-ranges = <&iomuxc  0 131 2>, <&iomuxc  2 137 8>, <&iomuxc 10 189 2>,
                      <&iomuxc 12 194 1>, <&iomuxc 13 193 1>, <&iomuxc 14 192 1>,
                      <&iomuxc 15 191 1>, <&iomuxc 16 185 2>, <&iomuxc 18 184 1>,
                      <&iomuxc 19 187 1>, <&iomuxc 20 183 1>, <&iomuxc 21 188 1>,
                      <&iomuxc 22 123 3>, <&iomuxc 25 121 1>, <&iomuxc 26 127 1>,
                      <&iomuxc 27 126 1>, <&iomuxc 28 128 1>, <&iomuxc 29 130 1>,
                      <&iomuxc 30 129 1>, <&iomuxc 31 122 1>;
};

I don't think it makes sense to specify maxItems.

Indeed, I will skip the max limit.

Best regards,
Krzysztof