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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: u.kleine-koenig@pengutronix.de
Cc: f.fainelli@gmail.com, linux-kernel@vger.kernel.org,
	linux-pwm@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	wahrenst@gmx.net, linux-input@vger.kernel.org,
	dmitry.torokhov@gmail.com, gregkh@linuxfoundation.org,
	devel@driverdev.osuosl.org, p.zabel@pengutronix.de,
	linux-gpio@vger.kernel.org, linus.walleij@linaro.org,
	linux-clk@vger.kernel.org, sboyd@kernel.org,
	linux-rpi-kernel@lists.infradead.org, bgolaszewski@baylibre.com,
	andy.shevchenko@gmail.com,
	Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	Rob Herring <robh@kernel.org>
Subject: [PATCH v8 09/11] dt-bindings: pwm: Add binding for RPi firmware PWM bus
Date: Fri, 12 Mar 2021 13:24:52 +0100	[thread overview]
Message-ID: <20210312122454.24480-10-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20210312122454.24480-1-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 v4:
 - Rename compatible string to be more explicit with the bus' limitations

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-poe-pwm.h        | 13 ++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 include/dt-bindings/pwm/raspberrypi,firmware-poe-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..e3664eab0f6a 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-poe-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-poe-pwm";
+            #pwm-cells = <2>;
+        };
     };
 ...
diff --git a/include/dt-bindings/pwm/raspberrypi,firmware-poe-pwm.h b/include/dt-bindings/pwm/raspberrypi,firmware-poe-pwm.h
new file mode 100644
index 000000000000..27c5ce68847b
--- /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
-- 
2.30.1


  parent reply	other threads:[~2021-03-12 12:26 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-12 12:24 [PATCH v8 00/11] Raspberry Pi PoE HAT fan support Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 01/11] firmware: raspberrypi: Keep count of all consumers Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 02/11] firmware: raspberrypi: Introduce devm_rpi_firmware_get() Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 03/11] clk: bcm: rpi: Release firmware handle on unbind Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 04/11] gpio: raspberrypi-exp: " Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 05/11] reset: raspberrypi: " Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 06/11] soc: bcm: raspberrypi-power: " Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 07/11] staging: vchiq: " Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 08/11] input: raspberrypi-ts: Release firmware handle when not needed Nicolas Saenz Julienne
2021-03-12 12:24 ` Nicolas Saenz Julienne [this message]
2021-03-12 12:24 ` [PATCH v8 10/11] DO NOT MERGE: ARM: dts: Add RPi's official PoE hat support Nicolas Saenz Julienne
2021-03-12 12:24 ` [PATCH v8 11/11] pwm: Add Raspberry Pi Firmware based PWM bus Nicolas Saenz Julienne
2021-03-12 20:12   ` Uwe Kleine-König
2021-03-15 16:12     ` Nicolas Saenz Julienne
2021-03-22 11:56   ` Thierry Reding

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