Re: [PATCH 11/14] dt-bindings: pinctrl: add binding for Ralink MT7620 pinctrl

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On 13/04/2022 18:37, Krzysztof Kozlowski wrote:
On 13/04/2022 08:07, Arınç ÜNAL wrote:
Add binding for the Ralink MT7620 pin controller for MT7620, MT7628 and
MT7688 SoCs.

Signed-off-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
---
  .../pinctrl/ralink,mt7620-pinctrl.yaml        | 87 +++++++++++++++++++
  1 file changed, 87 insertions(+)
  create mode 100644 Documentation/devicetree/bindings/pinctrl/ralink,mt7620-pinctrl.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/ralink,mt7620-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/ralink,mt7620-pinctrl.yaml
new file mode 100644
index 000000000000..01578b8aa277
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/ralink,mt7620-pinctrl.yaml
@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/ralink,mt7620-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ralink MT7620 Pin Controller
+
+maintainers:
+  - Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
+  - Sergio Paracuellos <sergio.paracuellos@xxxxxxxxx>
+
+description:
+  Ralink MT7620 pin controller for MT7620, MT7628 and MT7688 SoCs.
+  The pin controller can only set the muxing of pin groups. Muxing indiviual pins

Run spellcheck on original bindings, don't copy same typos.

Will address, thanks!


+  is not supported. There is no pinconf support.
+
+properties:
+  compatible:
+    const: ralink,mt7620-pinctrl
+
+patternProperties:
+  '-pins$':
+    type: object
+    patternProperties:
+      '^(.*-)?pinmux$':

Why do you have two levels here? pins->pinmux->actual pin configuration?

Yes, pins->pinmux->pin-configuration is currently how it's done.

Cannot be something like brcm,bcm636x has?

Dunno, I'll take a look.


+        type: object
+        description: node for pinctrl.
+        $ref: pinmux-node.yaml#
+
+        properties:
+          groups:
+            description: The pin group to select.

I wonder where do you configure particular pins because these are
groups... It's a bit confusing to configure "i2c" group into "i2c" -
looks obvious.

We don't configure each pin particularly. Ralink driver only supports muxing certain functions for certain pin groups as hinted on the binding description.


+            enum: [
+              # For MT7620 SoC
+              ephy, i2c, mdio, nd_sd, pa, pcie, rgmii1, rgmii2, spi, spi refclk, uartf, uartlite, wdt, wled,
+
+              # For MT7628 and MT7688 SoCs
+              gpio, i2c, i2s, p0led_an, p0led_kn, p1led_an, p1led_kn, p2led_an, p2led_kn, p3led_an,
+              p3led_kn, p4led_an, p4led_kn, perst, pwm0, pwm1, refclk, sdmode, spi, spi cs1, spis, uart0,
+              uart1, uart2, wdt, wled_an, wled_kn,
+            ]
+
+          function:
+            description: The mux function to select.
+            enum: [
+              # For MT7620 SoC
+              ephy, gpio, gpio i2s, gpio uartf, i2c, i2s uartf, mdio, nand, pa, pcie refclk, pcie rst,
+              pcm gpio, pcm i2s, pcm uartf, refclk, rgmii1, rgmii2, sd, spi, spi refclk, uartf, uartlite,
+              wdt refclk, wdt rst, wled,
+
+              # For MT7628 and MT7688 SoCs
+              antenna, debug, gpio, i2c, i2s, jtag, p0led_an, p0led_kn, p1led_an, p1led_kn, p2led_an,
+              p2led_kn, p3led_an, p3led_kn, p4led_an, p4led_kn, pcie, pcm, perst, pwm, pwm0, pwm1,
+              pwm_uart2, refclk, rsvd, sdxc, sdxc d5 d4, sdxc d6, sdxc d7, spi, spi cs1, spis, sw_r, uart0,
+              uart1, uart2, utif, wdt, wled_an, wled_kn, -,

All these lines do not fit in 80-character limit. Linux coding style
still expects this in most of cases.

Ok, dt_binding_check warns after 110 characters so I made it fit that. I'll update to 80.

Arınç



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