linux-kernel - [PATCH 2/3] dt-bindings: serial: 8250

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Message-ID: <20250904212455.3729029-3-k-willis@ti.com>
Date: Thu, 4 Sep 2025 16:24:54 -0500
From: Kendall Willis <k-willis@...com>
To: <gregkh@...uxfoundation.org>, <jirislaby@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <vigneshr@...com>,
        <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: <d-gole@...com>, <vishalm@...com>, <sebin.francis@...com>,
        <msp@...libre.com>, <khilman@...libre.com>, <a-kaur@...com>,
        <k-willis@...com>, <john.ogness@...utronix.de>,
        <andriy.shevchenko@...ux.intel.com>, <yujiaoliang@...o.com>,
        <b-liu@...com>, <u.kleine-koenig@...libre.com>
Subject: [PATCH 2/3] 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. Add support for the sleep state as
well which is in use by some devicetrees.

Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
Signed-off-by: Kendall Willis <k-willis@...com>
---
 .../devicetree/bindings/serial/8250_omap.yaml   | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/8250_omap.yaml b/Documentation/devicetree/bindings/serial/8250_omap.yaml
index 851a5291b4be4..1c4040a9f9d0b 100644
--- a/Documentation/devicetree/bindings/serial/8250_omap.yaml
+++ b/Documentation/devicetree/bindings/serial/8250_omap.yaml
@@ -77,6 +77,23 @@ properties:
         description:
           List of phandles to system idle states in which UARTs can wakeup the system.
 
+  pinctrl-0:
+    description: Default pinctrl state
+
+  pinctrl-1:
+    description: Can be "sleep" or "wakeup" pinctrl state
+
+  pinctrl-names:
+    description:
+      When present should contain at least "default" describing the default pin
+      states. Other states are "sleep" which describes the pinstate when
+      sleeping and "wakeup" describing the pins if wakeup is enabled.
+    minItems: 1
+    items:
+      - const: default
+      - const: sleep
+      - const: wakeup
+
 required:
   - compatible
   - reg
-- 
2.34.1