From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: f.fainelli@gmail.com, linux@roeck-us.net, jdelvare@suse.com,
wahrenst@gmx.net,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Eric Anholt" <eric@anholt.net>,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-pwm@vger.kernel.org, "Ray Jui" <rjui@broadcom.com>,
"Scott Branden" <sbranden@broadcom.com>,
"Nicolas Saenz Julienne" <nsaenzjulienne@suse.de>
Cc: linux-hwmon@vger.kernel.org, robh+dt@kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/3] dt-bindings: pwm: Add binding for RPi firmware PWM bus
Date: Fri, 9 Oct 2020 17:30:28 +0200 [thread overview]
Message-ID: <20201009153031.986-2-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201009153031.986-1-nsaenzjulienne@suse.de>
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>
---
.../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 21 +++++++++++++++++++
.../pwm/raspberrypi,firmware-pwm.h | 13 ++++++++++++
2 files changed, 34 insertions(+)
create mode 100644 include/dt-bindings/pwm/raspberrypi,firmware-pwm.h
diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
index a2c63c8b1d10..dcaf00e8602e 100644
--- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
@@ -64,6 +64,22 @@ properties:
- compatible
- "#reset-cells"
+ pwm:
+ type: object
+
+ properties:
+ compatible:
+ const: raspberrypi,firmware-pwm
+
+ "#pwm-cells":
+ const: 1
+ description: >
+ The argument is the PWM bus number.
+
+ required:
+ - compatible
+ - "#pwm-cells"
+
additionalProperties: false
required:
@@ -87,5 +103,10 @@ examples:
compatible = "raspberrypi,firmware-reset";
#reset-cells = <1>;
};
+
+ pwm: pwm {
+ compatible = "raspberrypi,firmware-pwm";
+ #pwm-cells = <1>;
+ };
};
...
diff --git a/include/dt-bindings/pwm/raspberrypi,firmware-pwm.h b/include/dt-bindings/pwm/raspberrypi,firmware-pwm.h
new file mode 100644
index 000000000000..27c5ce68847b
--- /dev/null
+++ b/include/dt-bindings/pwm/raspberrypi,firmware-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
--
2.28.0
next prev parent reply other threads:[~2020-10-09 15:30 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-09 15:30 [PATCH 0/3] Raspberry Pi 4 PoE HAT fan support Nicolas Saenz Julienne
2020-10-09 15:30 ` Nicolas Saenz Julienne [this message]
2020-10-12 7:01 ` [PATCH 1/3] dt-bindings: pwm: Add binding for RPi firmware PWM bus Uwe Kleine-König
2020-10-13 10:35 ` Nicolas Saenz Julienne
2020-10-13 12:08 ` Uwe Kleine-König
2020-10-13 12:33 ` Nicolas Saenz Julienne
2020-10-13 15:18 ` Uwe Kleine-König
2020-10-09 15:30 ` [PATCH 2/3] DO NOT MERGE: ARM: dts: Add RPi's official PoE hat support Nicolas Saenz Julienne
2020-10-09 15:30 ` [PATCH 3/3] pwm: Add Raspberry Pi Firmware based PWM bus Nicolas Saenz Julienne
2020-10-12 7:06 ` Uwe Kleine-König
2020-10-13 11:20 ` Nicolas Saenz Julienne
2020-10-13 12:17 ` Uwe Kleine-König
2020-10-13 16:50 ` Nicolas Saenz Julienne
2020-10-14 7:02 ` Uwe Kleine-König
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