From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Date: Thu, 8 Oct 2020 18:49:52 +0200
Subject: dt-bindings: pwm: Add binding for RPi firmware PWM bus
References: jsc#SLE-16543
Git-commit: a953e68ef2df657d8b65e16370e5808ec5819f23
Patch-mainline: v5.13-rc1

The PWM bus controlling the fan in RPi's official PoE hat can only be
controlled by the board's co-processor.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Rob Herring <robh@kernel.org>

---

Changes since v4:
 - Rename compatible to be more explicit with the bus' limitations

Changes since v3:
 - Fix example

Changes since v1:
 - Update bindings to use 2 #pwm-cells
---
 include/dt-bindings/pwm/raspberrypi,firmware-poe-pwm.h |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- /dev/null
+++ b/include/dt-bindings/pwm/raspberrypi,firmware-poe-pwm.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2020 Nicolas Saenz Julienne
+ * Author: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+ */
+
+#ifndef _DT_BINDINGS_RASPBERRYPI_FIRMWARE_PWM_H
+#define _DT_BINDINGS_RASPBERRYPI_FIRMWARE_PWM_H
+
+#define RASPBERRYPI_FIRMWARE_PWM_POE		0
+#define RASPBERRYPI_FIRMWARE_PWM_NUM		1
+
+#endif