linux-kernel - [PATCH v2 1/2] dt-bindings: serial: 8250

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Message-ID: <20250910-uart-daisy-chain-8250-omap-v2-1-e90d44c1a9ac@ti.com>
Date: Wed, 10 Sep 2025 16:23:31 -0500
From: Kendall Willis <k-willis@...com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby
	<jirislaby@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Vignesh Raghavendra
	<vigneshr@...com>
CC: <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <d-gole@...com>, <vishalm@...com>,
        <sebin.francis@...com>, <msp@...libre.com>, <khilman@...libre.com>,
        <a-kaur@...com>, <andriy.shevchenko@...ux.intel.com>,
        <yujiaoliang@...o.com>, <b-liu@...com>, <u.kleine-koenig@...libre.com>,
        Kendall Willis
	<k-willis@...com>
Subject: [PATCH v2 1/2] dt-bindings: serial: 8250_omap: Add wakeup pinctrl
 state

From: Markus Schneider-Pargmann <msp@...libre.com>

Pins associated with the 8250 omap unit can be the source of a wakeup in
deep sleep states. To be able to wakeup, these pins have to be
configured in a special way. To support this configuration add the
default and wakeup pinctrl states.

Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
Signed-off-by: Kendall Willis <k-willis@...com>
---
 Documentation/devicetree/bindings/serial/8250_omap.yaml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/8250_omap.yaml b/Documentation/devicetree/bindings/serial/8250_omap.yaml
index 1859f71297ff297141e5cd455574fa9ccd9dd11c..aabacca2b2fa6a7740173e6c415656360b5df4e4 100644
--- a/Documentation/devicetree/bindings/serial/8250_omap.yaml
+++ b/Documentation/devicetree/bindings/serial/8250_omap.yaml
@@ -71,6 +71,22 @@ properties:
   overrun-throttle-ms: true
   wakeup-source: true
 
+  pinctrl-0:
+    description: Default pinctrl state
+
+  pinctrl-1:
+    description: Wakeup pinctrl state
+
+  pinctrl-names:
+    description:
+      When present should contain at least "default" describing the default pin
+      states. The second state called "wakeup" describes the pins in their
+      wakeup configuration required to exit sleep states.
+    minItems: 1
+    items:
+      - const: default
+      - const: wakeup
+
 required:
   - compatible
   - reg

-- 
2.34.1