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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: u.kleine-koenig@pengutronix.de, linux-kernel@vger.kernel.org,
	Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Ray Jui <rjui@broadcom.com>,
	Scott Branden <sbranden@broadcom.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Eric Anholt <eric@anholt.net>, Stefan Wahren <wahrenst@gmx.net>
Cc: devel@driverdev.osuosl.org, linux-pwm@vger.kernel.org,
	devicetree@vger.kernel.org, sboyd@kernel.org,
	gregkh@linuxfoundation.org, linus.walleij@linaro.org,
	dmitry.torokhov@gmail.com, linux-gpio@vger.kernel.org,
	andy.shevchenko@gmail.com, Rob Herring <robh+dt@kernel.org>,
	linux-rpi-kernel@lists.infradead.org, p.zabel@pengutronix.de,
	linux-input@vger.kernel.org, bgolaszewski@baylibre.com,
	Rob Herring <robh@kernel.org>,
	linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 09/11] dt-bindings: pwm: Add binding for RPi firmware PWM bus
Date: Thu, 12 Nov 2020 17:36:27 +0100
Message-ID: <20201112163630.17177-10-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201112163630.17177-1-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>
Reviewed-by: Rob Herring <robh@kernel.org>
---

Changes since v3:
 - Fix example

Changes since v1:
 - Update bindings to use 2 #pwm-cells

 .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 20 +++++++++++++++++++
 .../pwm/raspberrypi,firmware-pwm.h            | 13 ++++++++++++
 2 files changed, 33 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..38be3ff69609 100644
--- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
@@ -64,6 +64,21 @@ properties:
       - compatible
       - "#reset-cells"
 
+  pwm:
+    type: object
+
+    properties:
+      compatible:
+        const: raspberrypi,firmware-pwm
+
+      "#pwm-cells":
+        # See pwm.yaml in this directory for a description of the cells format.
+        const: 2
+
+    required:
+      - compatible
+      - "#pwm-cells"
+
     additionalProperties: false
 
 required:
@@ -87,5 +102,10 @@ examples:
             compatible = "raspberrypi,firmware-reset";
             #reset-cells = <1>;
         };
+
+        pwm: pwm {
+            compatible = "raspberrypi,firmware-pwm";
+            #pwm-cells = <2>;
+        };
     };
 ...
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
-- 
2.29.2

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  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-12 16:36 [PATCH v4 00/11] Raspberry Pi PoE HAT fan support Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 01/11] firmware: raspberrypi: Keep count of all consumers Nicolas Saenz Julienne
2020-11-12 17:52   ` Andy Shevchenko
2020-11-13  7:26     ` Dmitry Torokhov
2020-11-23 17:19       ` Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 02/11] firmware: raspberrypi: Introduce devm_rpi_firmware_get() Nicolas Saenz Julienne
2020-11-12 17:25   ` Bartosz Golaszewski
2020-11-13  9:21     ` Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 03/11] clk: bcm: rpi: Release firmware handle on unbind Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 04/11] gpio: raspberrypi-exp: " Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 05/11] reset: raspberrypi: " Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 06/11] soc: bcm: raspberrypi-power: " Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 07/11] staging: vchiq: " Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 08/11] input: raspberrypi-ts: Release firmware handle when not needed Nicolas Saenz Julienne
2020-11-12 16:36 ` Nicolas Saenz Julienne [this message]
2020-11-12 16:36 ` [PATCH v4 10/11] DO NOT MERGE: ARM: dts: Add RPi's official PoE hat support Nicolas Saenz Julienne
2020-11-12 16:36 ` [PATCH v4 11/11] pwm: Add Raspberry Pi Firmware based PWM bus Nicolas Saenz Julienne

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